CN116142368B

CN116142368B - A foldable car

Info

Publication number: CN116142368B
Application number: CN202310165491.4A
Authority: CN
Inventors: 周应燕
Original assignee: Yongkang Yabu Industry & Trade Co ltd
Current assignee: Yongkang Yabu Industry & Trade Co ltd
Priority date: 2023-02-24
Filing date: 2023-02-24
Publication date: 2025-08-29
Anticipated expiration: 2043-02-24
Also published as: CN116142368A

Abstract

A foldable bicycle comprises a bicycle frame, wherein the bicycle frame comprises a front wheel frame, a pedal frame, a rear wheel frame and a seat frame, and is characterized by further comprising a locking mechanism, one end of the pedal frame is rotationally connected with the front wheel frame, the other end of the pedal frame is rotationally connected with the rear wheel frame, the seat frame is rotationally connected with the rear wheel frame, the bicycle frame can be switched between a folded state and an unfolded state, the connection part of the pedal frame and the rear wheel frame is arched upwards in the folded state to enable the front wheel frame, the pedal frame, the rear wheel frame and the seat frame to be mutually close, the bicycle frame is unfolded in the unfolded state to enable the pedal frame to be approximately horizontally arranged, and the locking mechanism enables the bicycle frame to be kept in the folded state or the unfolded state, namely, the front wheel frame, the pedal frame, the rear wheel frame and the seat frame are approximately overlapped and close in the folded state, so that the size of the bicycle frame after being folded is greatly reduced, and the bicycle frame is convenient to store and transport.

Description

Foldable vehicle

Technical Field

The invention relates to a foldable vehicle, which is particularly suitable for the elderly to walk instead of walk.

Background

The Chinese patent document CN114104151A discloses an electric folding seat for an old people recreational vehicle, which comprises a backrest frame, a cushion frame and a seat folding device, wherein the seat folding device comprises a left main support, a right main support, an upper support, a left lower support and a right lower support, shock absorbers, the two ends of the left main support and the right main support are hinged on front supports on the two sides of the cushion frame and the two sides of a vehicle frame, the upper parts of the left lower support and the right lower support are rotatably connected on the upper support, the lower parts of the left lower support and the right lower support are hinged on rear supports on the two sides of the vehicle frame, the shock absorbers are hinged between the cushion frame and the upper support, an inner lock hole and a track groove are correspondingly arranged on the left main support and the right main support, a spring and spring pins on the two sides of the spring are correspondingly arranged in a central tube of the upper support, a lock column section matched with the inner lock hole and a guide column section matched with the track groove are correspondingly arranged on the spring pins, and the guide column section extends out of the track groove and is connected with the locking mechanism. Can realize seat folding fast through seat folding device, can realize seat folding device's locking and unblock fast through locking mechanical system, folding is convenient fast, locks safe and reliable, but the old recreational vehicle of above-mentioned structure still has great volume after folding, is unfavorable for accomodating of old recreational vehicle.

Disclosure of Invention

The invention aims at overcoming the defects of the prior art and providing a foldable vehicle which can greatly reduce the volume after being folded.

The aim of the invention is realized by the following technical scheme:

The foldable bicycle comprises a bicycle frame, wherein the bicycle frame comprises a front wheel frame, a pedal frame, a rear wheel frame and a seat frame, and is characterized by further comprising a locking mechanism, wherein one end of the pedal frame is rotationally connected with the front wheel frame, the other end of the pedal frame is rotationally connected with the rear wheel frame, the seat frame is rotationally connected with the rear wheel frame, the bicycle frame can be switched between a folded state and an unfolded state, the connection part of the pedal frame and the rear wheel frame is upwards arched to enable the front wheel frame, the pedal frame, the rear wheel frame and the seat frame to be mutually close, and the bicycle frame is unfolded to enable the pedal frame to be approximately horizontally arranged in the unfolded state, namely, the front wheel frame, the pedal frame, the rear wheel frame and the seat frame are approximately overlapped and close in the folded state, so that the size of the folded bicycle frame is greatly reduced, and the folded bicycle frame is convenient to store and transport products.

The bicycle frame comprises a bicycle frame body, a bicycle frame, a rear wheel frame, a first locking arm, a second locking arm, a linkage rod, a locking rod and a spring, wherein the locking mechanism is arranged at the joint of the bicycle frame and the rear wheel frame and comprises a first locking arm, a second locking arm, the linkage rod, the locking rod and the spring, the locking rod is fixedly arranged on the rear wheel frame, the first locking arm and the second locking arm can be arranged on the bicycle frame in a swinging mode, the linkage rod is connected between the first locking arm and the second locking arm, the first locking arm is provided with an operating handle and a first hook, the second locking arm is provided with a second hook, the bicycle frame is in a unfolding state, the first hook hooks the locking rod and is kept through the spring, the bicycle frame and the rear wheel frame cannot rotate relatively through the operating handle, the bicycle frame can be folded to the second hook the locking rod through the spring, the bicycle frame can be folded relatively conveniently through the upward pulling operation handle, the bicycle frame can be folded and locked through the swinging operation handle, and the second hook can be automatically unfolded through the linkage rod under the action of the gravity when the bicycle frame is unfolded, and the bicycle frame can be unfolded conveniently.

The bicycle frame is characterized by further comprising a limiting mechanism arranged between the front wheel frame and the rear wheel frame, wherein the limiting mechanism comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotationally connected with the rear wheel frame through a first rotating shaft, the other end of the first connecting rod is rotationally connected with the front wheel frame through a second rotating shaft, one end of the second connecting rod is rotationally connected with the first connecting rod through a third rotating shaft, the other end of the second connecting rod can be movably connected with the front wheel frame between a first position and a second position, the third rotating shaft is arranged close to the second rotating shaft, when the bicycle frame is in a unfolding state, the other end of the second connecting rod moves to the first position, the first connecting rod and the second connecting rod limit the front wheel frame to rotate clockwise relative to the pedal frame, and when the bicycle frame is in a folding state, the other end of the second connecting rod moves to the second position, and the first connecting rod and the second connecting rod limit the front wheel frame to rotate anticlockwise relative to the pedal frame.

The front wheel frame is provided with a long hole, the other end of the second connecting rod is provided with a movable shaft positioned in the long hole, and two ends of the long hole are defined as a first position and a second position.

A first abutting part is arranged between the front wheel frame and the pedal frame, and the first abutting part limits the front wheel frame to rotate anticlockwise relative to the pedal frame when the frame is in a unfolding state.

Be provided with the bracing piece between the pedal frame with the seat frame, bracing piece one end with pedal frame rotates to be connected, the other end with the seat frame rotates to be connected, and this bracing piece can support the seat frame when the frame is expanded, makes the seat frame keep approximately vertical state, can drive the seat frame again towards the rear wheel frame and draw close in the frame folding process.

The first locking arm is connected with the pedal frame in a swinging way through the first swinging shaft, one end of the supporting rod is connected with the first swinging shaft in a rotating way, namely the supporting rod and the first locking arm share the same rotating shaft, so that the whole structure is more compact and reasonable.

The rear wheel frame is rotatably connected with the bottom of the pedal frame, and when the frame is in a unfolding state, the pedal frame is provided with a second abutting part which abuts against the top of the rear wheel frame.

The second locking arm can swing around the second swinging shaft and is arranged at the bottom of the pedal frame, the second locking arm is provided with a limiting surface which is propped against the bottom surface of the pedal frame, and the limiting surface limits the swinging angle of the second locking arm, so that the first locking arm and the second locking arm can still be kept at a position which can be used for the locking rod to enter after the first locking arm and the second locking arm are separated from the locking rod.

The first hook and/or the second hook are formed with a guide surface for guiding the locking lever into the hook, which can guide the locking lever to be smoothly hooked by the first hook and the second hook, thereby achieving smooth locking of the frame in the folded state and the unfolded state.

The spring is connected between the first locking arm and the pedal frame, so that the first locking arm and the second locking arm linked with the first locking arm can be driven to swing.

Drawings

The invention is described in further detail below with reference to the accompanying drawings.

Fig. 1 is a perspective view of the present invention with the frame in an extended state.

Fig. 2 is a perspective view of the present invention with the frame in a folded condition.

Fig. 3 is a perspective view of another view of the present invention with the frame in an extended state.

Fig. 4 is a perspective view of another view of the present invention, with the frame in a folded condition.

Fig. 5 is a schematic view of the locking mechanism in a deployed state of the frame.

Fig. 6 is a schematic view of the locking mechanism in a folded state of the frame.

Fig. 7 is a schematic structural view of the second locking arm.

Fig. 8 is a partial schematic view of the frame in a folded condition.

Fig. 9 is a partial schematic view of the frame in an expanded state.

Fig. 10 is a partial schematic view of the frame in another view with the frame in a folded condition.

Detailed Description

Referring to fig. 1 to 10, a foldable wagon includes a frame, a locking mechanism 6 and a limiting mechanism.

The frame comprises a front wheel frame 1, a pedal frame 2, a rear wheel frame 3 and a seat frame 4, one end of the pedal frame 2 is rotationally connected with the front wheel frame 1, the other end of the pedal frame 2 is rotationally connected with the rear wheel frame 3, the seat frame 4 is rotationally connected with the rear wheel frame 3, the frame can be switched between a folded state and an unfolded state, the joint of the pedal frame 2 and the rear wheel frame 3 is arched upwards in the folded state to enable the front wheel frame 1, the pedal frame 2, the rear wheel frame 3 and the seat frame 4 to be close to each other, and the frame is unfolded in the unfolded state to enable the pedal frame 2 to be approximately horizontally arranged.

The bottom of the front wheel frame 1 is provided with two front wheels 11, the top of the front wheel frame 1 is provided with an upwardly extending handlebar 12, the structure and mounting manner of the front wheels 11 and the handlebar 12 are well known in the prior art, the pedal frame 2 is in a generally rectangular plate-shaped structure, the specific pedal frame 2 comprises two pedal beams 2a which are arranged in parallel at intervals, one end of the pedal frame 2 is rotatably connected with the front wheel frame 1 through a first rotating shaft 21, the other end of the pedal frame 2 is rotatably connected with the rear wheel frame 3 through a second rotating shaft 31, the bottom of the rear wheel frame 3 is provided with two rear wheels 33, the specific mounting manner and structure of the rear wheels 33 are well known in the prior art, the rear wheel frame 3 comprises two rear wheel beams 3a which are arranged in parallel at intervals, one end of the rear wheel beam 3a is rotatably connected with the bottom of the pedal beam 2a close to the end through the second rotating shaft 31, the bottom of the end of the pedal beam 2a is provided with a second abutting part 22 which can abut against the top of the pedal beam 2a, the second abutting part 22 is composed of a cushion block of plastic, the structure can keep the pedal frame 2 in a horizontal state and keep the pedal frame 2 in a stable state in a unfolded state, and the buffer beam 3 plays a role in preventing the impact of the frame from being caused in the stable state.

The seat frame 4 comprises seat beams 4a which are arranged at intervals in parallel, a seat 41 is arranged at the top of the seat frame 4, a storage basket 42 is arranged at the rear side of the seat frame 4, the other end of the rear wheel beam 3a is rotationally connected with the lower end of the seat beam 4a through a third rotating shaft 32, a supporting rod 5 is arranged between the pedal frame 2 and the seat beam 4a, one end of the supporting rod 5 is rotationally connected with the pedal frame 2 through a first swinging shaft 613, the other end of the supporting rod 5 is rotationally connected with the seat beam 4a through a pivoting shaft 51, the supporting rod 5 can support the seat frame 4 when the frame is unfolded, the seat frame 4 is kept in a generally vertical state, the seat frame can drive the seat frame 4 to be drawn towards the rear wheel frame 3 in the folding process, the rear wheel beam 3a and the seat beam 4a are all made of round metal tubes, the pedal beam 2a is made of square metal tubes, and the first rotating shaft 21, the second rotating shaft 31, the third rotating shaft 32, the first swinging shaft 613 and the pivoting shaft 51 can be formed by bolts, rivets or the like.

The locking mechanism 6 is disposed at the connection position of the pedal frame 2 and the rear wheel frame 3, the locking mechanism 6 comprises a first locking arm 61, a second locking arm 65, a linkage rod 64, a locking rod 62 and a spring 63, the locking rod 62 is fixedly disposed on the rear wheel frame 3, the first locking arm 61 and the second locking arm 65 are respectively swingably disposed on the pedal frame 2 through a plurality of first swinging shafts 613 and second swinging shafts 651, one end of the linkage rod 64 is rotatably connected with the first locking arm 61 through a first pivot shaft 641, the other end is rotatably connected with the second locking arm 65 through a second pivot shaft 642, the first locking arm 61 is provided with a first hook 611, the second locking arm 65 is provided with a second hook 653, one end of the spring 63 is connected with the first locking arm 61, the other end is connected with the pedal frame 2 through a mounting plate 631, and the first hook 611 hooks the locking rod 62 and is held by the spring 63 when the pedal frame is in the unfolded state, so that the pedal frame 2 and the rear wheel frame 3 cannot rotate relatively, as shown in fig. 5.

The locking mechanism 6 comprises two groups which are symmetrically arranged, an operating handle 612 is arranged between the first locking arms 61 of the two groups of locking mechanisms 6, when the folding is needed, the operating handle 612 is pushed to enable the first locking arms 61 to swing to be separated from the locking rods 62 against the elastic force of the springs 63, then the operating handle 612 is lifted upwards to enable the bicycle frame to be folded to the second hooks 653 to hook the locking rods 62 and be kept by the springs 63, the bicycle frame 2 and the rear wheel frame 3 cannot rotate relatively, as shown in fig. 6, the folding operation is very convenient, folding and locking of the bicycle frame can be completed only by pushing the lifting operating handle 612, when the unfolding is needed, the operating handle 612 is pushed to enable the first locking arms 61 to swing and the second locking arms 65 to swing through the linkage rods 64, finally the second hooks 653 are separated from the locking rods 62, and the bicycle frame can be automatically unfolded and locked under the action of gravity, so that the operation is very convenient.

The limiting mechanism is arranged between the front wheel frame 1 and the rear wheel frame 3, the limiting mechanism comprises a first connecting rod 72 and a second connecting rod 71, one end of the first connecting rod 72 is rotationally connected with the rear wheel frame 3 through a first rotating shaft 722, the other end of the first connecting rod 72 is rotationally connected with the front wheel frame 1 through a second rotating shaft 721, one end of the second connecting rod 71 is rotationally connected with the first connecting rod 72 through a third rotating shaft 711, the other end of the second connecting rod is movably connected with the front wheel frame 1 between a first position and a second position, the third rotating shaft 711 is arranged close to the second rotating shaft 721, an elongated hole 13 is arranged on the front wheel frame 1, the other end of the second connecting rod 71 is provided with a moving shaft positioned in the elongated hole 13, two ends of the elongated hole 13 are defined as a first position and a second position, a first abutting part 14 is arranged between the front wheel frame 1 and the pedal frame 2, the first abutting part 14 limits the front wheel frame 1 to rotate anticlockwise relative to the pedal frame 2 when the frame is in an unfolding state, the other end of the second connecting rod 71 moves to a first position when the frame is in the unfolding state, as shown in fig. 9, the first connecting rod 72 and the second connecting rod 71 cooperate to pull the front wheel frame 1, so that the front wheel frame 1 cannot rotate clockwise relative to the pedal frame 2, and when the frame is in a folding state, the other end of the second connecting rod 71 moves to a second position, as shown in fig. 10, the first connecting rod 72 and the second connecting rod 71 cooperate to push the front wheel frame 1, so that the front wheel frame 1 cannot rotate anticlockwise relative to the pedal frame 2, and the front wheel frame 1 is prevented from rotating relative to the pedal frame 2 in the unfolding state and the folding state.

The second locking arm 65 is swingably disposed at the bottom of the pedal frame 2 around the second swing axis 651, the bottom of the pedal frame 2 is provided with a mounting seat 652 for mounting the second swing axis 651, the second locking arm 65 has a limiting surface abutting against the bottom surface of the pedal frame 2, the limiting surface limits the swing range of the second locking arm 65, it is ensured that the first locking arm 61 and the second locking arm 65 can still be kept at a position allowing the locking rod 62 to enter after being separated from the locking rod 62, the specific second locking arm 65 is in a plate-shaped structure, one side of the top of the second locking arm 65 is a right angle 655, the opposite side is a round angle 653, the top surface of the right angle 655 forms a limiting surface, the first hook 611 and/or the second hook 653 is formed with guiding surfaces 614 and 654 for guiding the locking rod 62 to enter the hooks, and the guiding surfaces 614 and 654 can guide the locking rod 62 to be smoothly hooked by the first hook 611 and the second hook 653, thereby realizing smooth locking of the frame in the folded state and the unfolded state.

When the bicycle frame is required to be folded, the operation handle 612 is pushed to enable the first hook 611 of the first locking arm 61 to swing to be separated from the locking rod 62 against the elastic force of the spring 63, then the operation handle 612 is pulled upwards to enable the bicycle frame to be folded to the second hook 653 to hook the locking rod 62 and be kept by the spring 63, the bicycle frame 2 and the rear wheel frame 3 cannot rotate relatively, in the folding process of the bicycle frame, the first connecting rod 72 drives the second connecting rod 71 to move to the second position, the first connecting rod 72 and the second connecting rod 71 are matched to prop against the front wheel frame 1, the front wheel frame 1 cannot rotate anticlockwise relative to the bicycle frame 2, and the bicycle frame can be kept in a folded state;

When the bicycle frame needs to be unfolded, the first locking arm 61 is swung by pushing the operating handle 612, the second locking arm 65 is driven to swing by the linkage rod 64, finally the second hook 653 is separated from the locking rod 62, the bicycle frame can be automatically unfolded under the action of gravity, the first hook 611 of the first locking arm 61 hooks the locking rod 62, in the process, the first connecting rod 72 and the second connecting rod 71 are linked, the other end of the second connecting rod 71 moves to the first position, as shown in fig. 9, the first connecting rod 72 and the second connecting rod 71 cooperate to pull the front wheel frame 1, so that the front wheel frame 1 cannot rotate clockwise relative to the pedal frame 2, and the unfolded state of the bicycle frame can be maintained.

The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, i.e., the invention is not to be limited to the details of the claims and the description, but rather is to cover all modifications which are within the scope of the invention.

Claims

1. A foldable bicycle, comprising a bicycle frame, wherein the bicycle frame comprises a front wheel frame (1), a pedal frame (2), a rear wheel frame (3) and a seat frame (4), characterized in that: the bicycle frame further comprises a locking mechanism (6), one end of the pedal frame (2) is rotatably connected to the front wheel frame (1), and the other end is rotatably connected to the rear wheel frame (3), and the seat frame (4) is rotatably connected to the rear wheel frame (3), and the bicycle frame can be switched between a folded state and an unfolded state, in which the connection between the pedal frame (2) and the rear wheel frame (3) is arched upward so that the front wheel frame (1), the pedal frame (2), the rear wheel frame (3) and the seat frame (4) are brought closer to each other, and in the unfolded state, the bicycle frame is unfolded so that the pedal frame (2) is arranged approximately horizontally;

The invention also includes a locking mechanism (6) for keeping the frame in a folded state or an unfolded state. The locking mechanism (6) is arranged at the connection between the pedal frame (2) and the rear wheel frame (3), and includes a first locking arm (61), a second locking arm (65), a linkage rod (64), a locking rod (62) and a spring (63). The locking rod (62) is fixedly arranged on the rear wheel frame (3). The first locking arm (61) and the second locking arm (65) are both swingably arranged on the pedal frame (2). The linkage rod (64) is connected between the first locking arm (61) and the second locking arm (65). The first locking arm (61) is provided with an operating handle (612). and a first hook (611), the second locking arm (65) is provided with a second hook (653), when the frame is in the unfolded state, the first hook (611) hooks the locking rod (62) and is held by the spring (63), so that the pedal frame (2) and the rear wheel frame (3) cannot rotate relative to each other; when it is necessary to fold, the first locking arm (61) is swung to disengage from the locking rod (62) by the operating handle (612), and then the operating handle (612) is pulled upward to make the frame close and fold until the second hook (653) hooks the locking rod (62) and is held by the spring (63), so that the pedal frame (2) and the rear wheel frame (3) cannot rotate relative to each other;

The invention also includes a limiting mechanism arranged between the front wheel frame (1) and the rear wheel frame (3), the limiting mechanism including a first connecting rod (72) and a second connecting rod (71), one end of the first connecting rod (72) is rotatably connected to the rear wheel frame (3) through a first rotating shaft (722), and the other end is rotatably connected to the front wheel frame (1) through a second rotating shaft (721), one end of the second connecting rod (71) is rotatably connected to the first connecting rod (72) through a third rotating shaft (711), and the other end can be movably connected to the front wheel frame (1) between a first position and a second position, and the third rotating shaft (711) is rotatably connected to the first connecting rod (72) through a third rotating shaft (711). The shaft (711) is arranged close to the second rotating shaft (721). When the frame is in an unfolded state, the other end of the second connecting rod (71) moves to a first position, and the first connecting rod (72) and the second connecting rod (71) restrict the front wheel frame (1) from rotating clockwise relative to the pedal frame (2). When the frame is in a folded state, the other end of the second connecting rod (71) moves to a second position, and the first connecting rod (72) and the second connecting rod (71) restrict the front wheel frame (1) from rotating counterclockwise relative to the pedal frame (2). Two rear wheels (33) are arranged at the bottom of the rear wheel frame (3).

2. A foldable vehicle according to claim 1, characterized in that: an elongated hole (13) is provided on the front wheel frame (1), and the other end of the second connecting rod (71) is provided with a movable shaft (712) located in the elongated hole (13), and the two ends of the elongated hole (13) are defined as the first position and the second position.

3. A foldable vehicle according to claim 1, characterized in that a first abutment portion (14) is provided between the front wheel frame (1) and the footrest frame (2), and the first abutment portion (14) limits the front wheel frame (1) from rotating counterclockwise relative to the footrest frame (2) when the frame is in the unfolded state.

4. A foldable vehicle according to any one of claims 1 to 3, characterized in that a support rod (5) is provided between the footrest frame (2) and the seat frame (4), one end of the support rod (5) is rotatably connected to the footrest frame (2), and the other end is rotatably connected to the seat frame (4).

5. A foldable vehicle according to claim 4, characterized in that: the first locking arm (61) is swingably connected to the pedal frame (2) through a first swing shaft (613), and one end of the support rod (5) is rotationally connected to the first swing shaft (613).

6. A foldable vehicle according to any one of claims 1 to 3, characterized in that the rear wheel frame (3) is rotatably connected to the bottom of the footrest frame (2), and when the frame is in the unfolded state, the footrest frame (2) has a second abutment portion (22) abutting against the top of the rear wheel frame (3).

7. A foldable vehicle according to any one of claims 1 to 3, characterized in that the first hook (611) and/or the second hook (653) is formed with a guide surface (614, 654) for guiding the locking rod (62) into the hook.

8. A foldable vehicle according to any one of claims 1 to 3, characterized in that the spring (63) is connected between the first locking arm (61) and the footrest (2).