WO2020010799A1

WO2020010799A1 - Frame and tricycle

Info

Publication number: WO2020010799A1
Application number: PCT/CN2018/121063
Authority: WO
Inventors: 丁峰; 赖春华
Original assignee: 江苏小小恐龙儿童用品集团有限公司
Priority date: 2018-07-10
Filing date: 2018-12-14
Publication date: 2020-01-16
Also published as: CN108674550A; CN108674550B

Abstract

A frame, comprising: a front fork (1); a front wheel (2) provided at a lower portion of the front fork (1); a handlebar (3) provided on the front fork (1) and provided to control the steering of the front wheel; a rear support (4); a push bar (6), rotatably connected to the rear support (4); a head pipe (7), provided on the front fork (1); a main frame (8), rotatably connected to the head pipe (7) and the rear support (4), and the main frame (8) being able to slide along the push bar (6); and a link bar (10). The head pipe (7), the main frame (8), the rear support (4) and the link bar (10) form a four-bar linkage.

Description

Frame and tricycle

This application claims priority from a Chinese patent application with a filing date of July 10, 2018 and application number 201810753420.5, the entire contents of which are incorporated herein by reference.

Technical field

The present disclosure relates to the technical field of baby carriages, for example, to a frame and a tricycle.

Background technique

A tricycle for children in the related art includes a front fork, a front wheel provided at a lower portion of the front fork, a handlebar provided on the front fork and capable of controlling front wheel steering, a main frame extending in a front-rear direction, and A seat on the frame, a rear bracket provided on the frame, and a rear wheel provided on the rear bracket.

In the related art, the two ends of the main frame of the children's tricycle are fixedly connected to the front fork and the rear bracket, respectively. Therefore, the main frame cannot be folded, and can only be presented in the posture when riding. In addition, after the existing folding tricycles on the market are folded, the putter for adult operation cannot be linked with the frame, so when it is folded twice, not only the folding volume is large and the operation is inconvenient, but it also causes higher costs during transportation.

Summary of the invention

The present disclosure provides a frame and a tricycle, which can be quickly folded according to user needs, and when the main frame is folded, it can be folded in conjunction with a push rod, which is not only convenient to operate and small in size, but also reduces transportation costs.

An embodiment provides a vehicle frame including: a front fork; a front wheel provided at a lower portion of the front fork; a handlebar provided on the front fork and configured to control steering of the front wheel; a rear bracket; two Two rear wheels respectively arranged on both sides of the rear bracket; a push rod is rotatably connected to the rear bracket; a head pipe is provided on the front fork; a main frame is rotatably connected to the head pipe and the rear A bracket, and the main frame includes a sliding portion sleeved on the push rod, the sliding portion is slidable along the push rod; and a link, a first end of the link is rotatably connected to the push rod The head pipe, the second end of the connecting rod is rotatably connected to the rear bracket, and the head pipe, the main frame, the rear bracket and the connecting rod form a four-link mechanism.

An embodiment also provides a tricycle including a seat assembly and the above-mentioned frame, the seat assembly including a seat provided on the main frame and a front armrest both rotated on the seat And poncho.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of a vehicle frame in a fully deployed state according to an embodiment;

FIG. 2 is a schematic structural view of a vehicle frame in a half-folded state from one perspective according to an embodiment; FIG.

3 is a schematic structural view of a vehicle frame provided in an embodiment from another perspective in a half-folded state;

FIG. 4 is a schematic structural diagram of a vehicle frame in a fully folded state according to an embodiment.

In the picture:

1. Front fork; 2. Front wheel; 3. Handlebar; 4. Rear bracket; 5. Rear wheel; 6. Push rod; 7. Head tube; 8. Main frame; 9. Locking mechanism; 10. Poles; 11, seats; 12, front armrests; 13, tent poles;

41. Side beams;

61. Limit block;

81. Support rod; 82. Sliding sleeve;

91. Locking bar; 92. Locking piece; 921. Groove; 93. Connecting piece.

detailed description

This embodiment provides a tricycle. In one embodiment, the tricycle is a children's tricycle. As shown in FIG. 1, the children's tricycle includes a seat assembly and a frame, and the seat assembly includes a main frame 8. The seat 11 and the front armrest 12 and the canopy 13 provided on the seat 11 are rotated. In the children's tricycle, both the front armrest 12 and the canopy rod 13 have a rotation function, which is not only convenient to operate and small in volume after being folded, but also can be folded according to user needs, which is convenient for storage and carrying, and reduces transportation costs.

This embodiment also provides a vehicle frame, as shown in FIGS. 1-4. The vehicle frame includes a front fork 1, a front wheel disposed on a lower portion of the front fork 1, and a front wheel 1 disposed on the front fork 1 and capable of controlling the front wheel. 2 Steering handlebar 3, rear bracket 4, two rear wheels provided on both sides of the rear bracket 4, and 5 a push rod 6, head tube 7, main frame 8, connecting rod 10 and The locking mechanism 9 is provided with a head pipe 7 on the front fork 1; the main frame 8 is rotatably connected to the head pipe 7 and the rear bracket 4, respectively, and the main frame 8 includes a sliding part, which is sleeved on the push rod 6. And can slide along the push rod 6; both ends of the connecting rod 10 are respectively connected to the head pipe 7 and the rear bracket 4, the head pipe 7, the main frame 8, the rear bracket 4 and the connecting rod 10 form a four-link mechanism; The mechanism 9 is provided to lock and unlock between the main frame 8 and the rear bracket 4.

The main frame 8 is rotatably connected to the head pipe 7 and the rear bracket 4, respectively, and both ends of the connecting rod 10 are rotatably connected to the head pipe 7 and the rear bracket 4, respectively, so that the head pipe 7, the main frame 8, the rear bracket 4 and the connection The lever 10 forms a four-link mechanism. When the frame needs to be folded, the lock between the frame and the rear bracket 4 is released first. Since the main frame 8 is partially sleeved on the push rod 6, the main frame 8 slides. The part slides up along the push rod 6, and drives the head tube 7, the connecting rod 10, the rear bracket 4 and the front fork 1 to move closer to the push rod 6 to achieve the folding of the frame; when the frame needs to be unfolded, the main frame The sliding part of 8 slides down the push rod 6 and drives the head tube 7, the connecting rod 10, the rear bracket 4 and the front fork 1 to spread away from the push rod 6, and then the main frame 8 and The rear bracket 4 is locked, and then the frame is unfolded and locked.

The frame can be unfolded when you need to ride, and folded when you need to carry, store, and transport. It can be freely switched between folded and unfolded states according to user needs, and it is convenient for users to use. At the same time, the frame is small after folding. It occupies a small space, is easy to store and carry, and reduces transportation costs.

As shown in Figures 1-2, in order to facilitate the user to slide the main frame 8 along the push rod 6, the main frame 8 includes a support rod 81, wherein the sliding portion is a sliding sleeve 82, wherein the first end of the support rod 81 The second end of the support rod 81 is rotatably connected to the first end of the sliding sleeve 82, and the middle portion of the support rod 81 is rotatably connected to the rear bracket 4. The head pipe 7 and the rear bracket 4, and the upper ends of the rear bracket 4 are rotatably connected to the connecting rod 10 and the supporting rod 81, respectively. Therefore, the head pipe 7, the supporting rod 81, the rear bracket 4 and the connecting rod 10 form a four-link 10 mechanism. At the same time, the first end of the sliding sleeve 82 is rotatably connected to the second end of the support rod 81, and the second end of the sliding sleeve 82 is sleeved on the push rod 6 and can slide along the push rod 6. When the frame needs to be folded, the sliding sleeve 82 is slid upward along the push rod 6 and is limited by a limit block 61 provided on the upper end of the push rod 6.

As shown in FIG. 1 to FIG. 2, the rear bracket 4 includes two side beams 41 arranged in parallel. The link 10 and the main frame 8 are both disposed between the two side beams 41. The use of two side beams 41 has a good load bearing effect, thereby enhancing the stability of the overall structure of the frame. At the same time, the side beam 41 is an arc-shaped structure, which not only has beautiful appearance, but also avoids the sharp edges and corners from harming children and improves the safety performance.

As shown in FIGS. 1-4, the above-mentioned locking mechanism 9 includes a locking component rotatably disposed on the support rod 81 and a locking crossbar 91 provided between the two side beams 41. The locking component is detachably connected to the lock The cross bar 91 is used for locking and unlocking between the support bar 81 and the rear bracket 4.

The above-mentioned locking assembly includes two locking pieces 92 which are rotatably disposed on both sides of the support rod 81, and the two locking pieces 92 are connected through a connecting piece provided above the main frame 8, so that the two locking pieces 92 Form a complete whole. The first end of the locking piece 92 is provided with a rotating portion configured to be rotatably connected to the main frame 8, and the second end is provided with a groove 921 capable of snapping the locking crossbar 91. Compared with related technologies, the locking mechanism has a simple structure, is easy to operate, and has low production cost, which is suitable for mass production.

The working process of the frame provided in this embodiment is as follows:

When the frame needs to be folded, the portion connecting the locking piece 92 and the connecting piece is lifted upward, and the locking piece 92 is turned away from the locking crossbar 91, so that the groove 921 of the locking piece 92 is disengaged. Lock the crossbar 91, and then release the lock between the support rod 81 and the rear bracket 4, and then slide the sliding sleeve 82 upward along the push rod 6, and drive the head tube 7, the connecting rod 10, the rear bracket 4 and the front fork 1 to push The directions of the rods 6 are brought closer together to realize the folding of the frame.

When the frame needs to be unfolded, slide the sliding sleeve 82 down along the push rod 6, and drive the head tube 7, the connecting rod 10, the rear bracket 4 and the front fork 1 to diffuse away from the push rod 6, and then complete the vehicle. After the rack is unfolded, first press down the portion where the locking piece 92 is connected to the connecting piece, and rotate the locking piece 92 in a direction close to the locking crossbar 91, so that the groove 921 of the locking piece 92 is engaged with the locking cross The lever 91 further locks the support lever 81 and the rear bracket 4.

Claims

A vehicle frame including:

Fork (1);

A front wheel (2) arranged below the front fork (1);

A handlebar (3) arranged on the front fork (1) and configured to control the steering of the front wheel (2);

Rear bracket (4);

Two rear wheels (5) respectively arranged on both sides of the rear bracket (4);

The push rod (6) is rotatably connected to the rear bracket (4);

A head pipe (7) is arranged on the front fork (1);

The main frame (8) is rotatably connected to the head pipe (7) and the rear bracket (4), respectively, and the main frame (8) includes a slide sleeved on the push rod (6) Part, the sliding part is slidable along the push rod (6); and

A connecting rod (10), a first end of the connecting rod (10) is rotatably connected to the head pipe (7), and a second end of the connecting rod (10) is rotatably connected to the rear bracket (4), The head pipe (7), the main frame (8), the rear bracket (4), and the link (10) form a four-link mechanism.
The frame according to claim 1, further comprising a locking mechanism (9) configured to lock and unlock the main frame (8) and the rear bracket (4) .
The frame according to claim 1, wherein the main frame (8) includes a support rod (81) rotatably connected to the head pipe (7) and the rear bracket (4), respectively.
The frame according to claim 3, wherein the sliding portion is a sliding sleeve (82), and a first end of the sliding sleeve (82) is rotatably connected to the support rod (81), and the sliding sleeve (82 82) The second end is sleeved on the push rod (6) and can slide along the push rod (6).
The vehicle frame according to claim 4, wherein the push rod (6) includes a limit block (61) configured to limit the slide sleeve (82).
The frame according to claim 2, wherein the locking mechanism (9) comprises a locking component rotatably provided on the main frame (8) and a locking cross provided on the rear bracket (4). A lever (91), and the locking component is detachably connected to the locking crossbar (91).
The frame according to claim 6, wherein the locking assembly comprises two locking pieces (92) rotatably provided on both sides of the main frame (8) and the main frame ( 8) The upper connecting piece (93), and the two locking pieces (92) are connected through the connecting piece (93).
The vehicle frame according to claim 7, wherein the first end of the locking piece (92) is provided with a rotating portion rotatably connected to the main frame (8), and the locking piece (92) The second end is provided with a groove (921) for locking the locking crossbar (91).
The frame according to claim 1, wherein the rear bracket (4) comprises two side beams (41) arranged in parallel, and the link (10) and the main frame (8) are both provided Between two side beams (41).
A tricycle includes a seat assembly and a frame according to any one of claims 1-9, wherein the seat assembly includes a seat (11) disposed on the main frame (8) and both are rotatably disposed on A front armrest (12) and a canopy rod (13) on the seat (11).