Four-wheeler convenient to fold

Abstract

The invention discloses a four-wheeler convenient to fold. The four-wheeler comprises a frame, a cross frame, a handle and a brake handle, wherein the cross frame is mounted between the frames, and the handle and the brake handle are mounted on the frames; a connecting rod is movably connected between the cross frame and the frame; the foldable baby carriage is characterized in that a wheel fixing frame and wheels mounted on the wheel fixing frame are mounted at the bottom of the carriage frame in a foldable manner; the frame is also provided with a fixed seat; the fixing seat is sleeved with a locking sleeve which is connected with the cross frame and can rotate to lock or unlock the wheel fixing frame when the cross frame is unfolded or folded. A locking table facilitating locking of the locking sleeve is arranged on the wheel fixing frame. The locking sleeve rotates when the cross frame is unfolded or folded, the frame and the wheel fixing frame are locked when the locking sleeve makes contact with the locking table, unlocking is conducted when the locking sleeve is separated from the locking table, folding is conducted along with the cross frame at the same time, and therefore locking or folding between the frame and the wheel fixing frame is facilitated; and the use convenience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of four-wheeled vehicles, in particular to a four-wheeled vehicle which is easy to fold. Background Art

[0002] A four-wheeled vehicle that can assist walking, also known as a four-wheeled walker, is designed to help people with limited mobility, such as the elderly, the disabled, or patients undergoing rehabilitation training, to support their walking and standing balance; in order to facilitate the carrying of the four-wheeled vehicle and reduce the volume of the packaging shell, the four-wheeled vehicle is set to a foldable structure, but in the existing technology, the folding of the four-wheeled vehicle can only fold the frame of the four-wheeled vehicle to the left and right, but the wheel fixing frame and the wheels at the bottom of the frame cannot be folded. When packing the four-wheeled vehicle, the frame fixing frame and the wheels can only be removed from the frame, and then the frame fixing frame and the wheels are installed to the bottom of the frame when in use. This method reduces the convenience of use and is also prone to missing when packing. For this reason, a four-wheeled vehicle that is easy to fold and can improve the convenience of use is proposed. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide a foldable four-wheeled vehicle.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a four-wheeled vehicle that is easy to fold, comprising a frame, a cross frame installed between the frames, and a handle and a brake handle installed on the frame; a connecting rod movably connected between the cross frame and the frame; it is characterized in that a wheel fixing frame and a wheel installed on the wheel fixing frame can be folded and installed at the bottom of the frame; a fixing seat is also installed on the frame; a locking sleeve is mounted on the fixing seat, which is connected to the cross frame and can be rotated when the cross frame is opened or folded to lock or unlock the wheel fixing frame; and a locking platform is provided on the wheel fixing frame for facilitating the locking of the locking sleeve.

[0005] Preferably, a rotating shaft for limiting the axial position of the locking sleeve is also installed on the fixing seat, so that the locking sleeve can rotate along the rotating shaft.

[0006] Preferably, the locking sleeve is provided with a locking hook adapted to the locking platform.

[0007] Preferably, a rotation pin is installed between the vehicle frame and the wheel fixing frame, so that the wheel fixing frame can be rotated and folded along the rotation pin.

[0008] Preferably, the frame includes a left frame and a right frame connected via a cross frame; a locking plate, an unlocking belt connected to the locking plate, and a locking rod arranged on the connecting rod and capable of locking the cross frame are movably mounted on the cross frame.

[0009] Preferably, the locking piece is provided with a pressure rod and a locking groove adapted to the locking rod; and a connecting pin is installed between the locking piece and the cross frame.

[0010] Preferably, a torsion spring of an integrated structure is installed between the locking plate, the connecting pin and the cross frame; one end of the torsion spring is fixed between the connecting pin and the cross frame, one end is fixed to the cross frame and the locking plate, and the other end is sleeved on the pressure rod.

[0011] Preferably, a seat cushion and an article placement box are also installed on the cross frame; the unlocking belt passes through the seat cushion and is connected to locking pieces on both sides of the cross frame.

[0012] Preferably, a crutch fixing clip for fixing the crutch is also installed on the left frame.

[0013] The beneficial effects of the present invention are as follows: the locking sleeve rotates as the cross frame is opened or folded, so that the frame and the wheel fixing frame are locked when the locking sleeve contacts the locking platform, and the frame and the wheel fixing frame are unlocked when the locking sleeve is separated from the locking platform, and the frame and the wheel fixing frame are folded simultaneously with the cross frame, thereby facilitating the locking or folding of the frame and the wheel fixing frame, improving the convenience of use, and reducing the footprint of the overall folding of the four-wheeled vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 It is a schematic diagram of the local structure of the present invention.

[0016] Figure 3 It is a schematic diagram of the local structure of the present invention.

[0017] Figure 4 The present invention Figure 3 A partial enlarged view of point A in the middle.

[0018] Figure 5 It is a partial structural schematic diagram of the cross frame of the present invention.

[0019] Legend: 1. Frame; 101. Fixed seat; 102. Rotating shaft; 103. Left frame; 104. Right frame; 105. Locking plate; 106. Unlocking belt; 107. Pressure rod; 108. Locking slot; 109. Connecting pin; 110. Torsion spring; 111. Crutch fixing clip; 2. Cross frame; 201. Locking sleeve; 202. Locking hook; 203. Cushion; 204. Item storage box; 3. Handle; 4. Brake handle; 5. Connecting rod; 501. Locking rod; 6. Wheel fixing frame; 601. Wheel; 602. Locking platform; 603. Rotating pin. DETAILED DESCRIPTION

[0020] The following is a further description of the foldable four-wheeled vehicle according to the present invention with reference to the accompanying drawings.

[0021] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0022] See attached Figure 1-5 As shown, in this embodiment, a foldable four-wheeled vehicle comprises a frame 1, a cross frame 2 installed between the frames 1, and a handle 3 and a brake handle 4 installed on the frame 1; a connecting rod 5 movably connected between the cross frame 2 and the frame 1; it is characterized in that a wheel fixing frame 6 and a wheel 601 installed on the wheel fixing frame 6 are foldably installed at the bottom of the frame 1; a fixing seat 101 is also installed on the frame 1; a fixing seat 101 is mounted on the fixing seat 101, which is connected to the cross frame 2 and can be rotated when the cross frame 2 is opened or folded to lock or unlock the wheel fixing frame 6. The locking sleeve 201 is provided on the wheel fixing frame 6 to facilitate locking of the locking sleeve 201. The locking sleeve 201 rotates when the cross frame 2 is opened or folded, so that when the locking sleeve 201 contacts the locking platform 602, the frame 1 and the wheel fixing frame 6 are locked. When the locking sleeve 201 is separated from the locking platform 602, the frame 1 and the wheel fixing frame 6 are unlocked, and the cross frame 2 is folded at the same time, thereby facilitating locking or folding of the frame 1 and the wheel fixing frame 6, improving convenience of use, and reducing the footprint of the overall folding of the four-wheeled vehicle.

[0023] See attached Figure 1-2 As shown, a rotating shaft 102 for limiting the axial position of the locking sleeve 201 is also installed on the fixing seat 101, so that the locking sleeve 201 can rotate along the rotating shaft 102; a locking hook 202 adapted to the locking platform 602 is provided on the locking sleeve 201; a rotating pin 603 is installed between the frame 1 and the wheel fixing frame 6, so that the wheel fixing frame 6 can be rotated and folded along the rotating pin 603; the locking hook 202 is driven by the locking sleeve 201 to rotate along the rotating shaft 102, and the locking hook 202 is separated from the locking platform 602, so that the wheel fixing frame 6 can be folded along the rotating pin 603, and when the locking hook 202 hooks the locking platform 602, the wheel fixing frame 6 and the frame 1 are locked, thereby facilitating the folding and locking of the wheel fixing frame 6.

[0024] See attached Figure 3-5As shown, the frame 1 includes a left frame 103 and a right frame 104 connected via a cross frame 2; a locking piece 105, an unlocking belt 106 connected to the locking piece 105, and a locking rod 501 arranged on the connecting rod 5 and capable of locking the cross frame 2 are movably mounted on the cross frame 2; a pressing rod 107 and a locking groove 108 adapted to the locking rod 501 are arranged on the locking piece 105; a connecting pin 109 is installed between the locking piece 105 and the cross frame 2; an integrated torsion spring 110 is installed between the locking piece 105, the connecting pin 109 and the cross frame 2; the torsion spring 110 0 One end is fixed between the connecting pin 109 and the cross frame 2, one end is fixed between the cross frame 2 and the locking piece 105, and the other end is sleeved on the pressure rod 107; the unlocking belt 106 passes through the seat cushion 203 and is connected with the locking pieces 105 on both sides of the cross frame 2; by pulling the unlocking belt 106, the unlocking belt 106 pulls the locking piece 105 to rotate along the connecting pin 109, and the locking groove 108 on the locking piece 105 is separated from the locking rod 501, so that the cross frame 2 is folded, thereby driving the left frame 103 and the right frame 104 to fold, thereby facilitating the folding of the left frame 103 and the right frame 104.

[0025] See attached Figure 1 As shown, a seat cushion 203 and an article placement box 204 are also installed on the cross frame 2; a crutch fixing clip 111 for fixing a crutch is also installed on the left frame 103; the crutch is fixed by using the crutch fixing clip 111, thereby facilitating the fixing of the crutch.

[0026] During the use of the present invention, when the four-wheeled vehicle is folded, the unlocking belt 106 is pulled, and the unlocking belt 106 pulls the locking piece 105 to rotate along the connecting pin 109, and the locking groove 108 on the locking piece 105 is separated from the locking rod 501, so that the cross frame 2 is folded, thereby driving the left frame 103 and the right frame 104 to fold. When the cross frame 2 is folded, it also drives the locking sleeve 201 to rotate along the rotating shaft 102, and the locking sleeve 201 drives the locking hook 202 to rotate along the rotating shaft 102, and the locking hook 202 is separated from the locking platform 602, and the wheel fixing frame 6 can be folded along the rotating pin 603, so that the wheel fixing frame 6 and the left frame 103 and the right frame 104 are folded; When the four-wheel vehicle needs to be used, the cross frame 2 is spread outwards, and one end of the cross frame 2 drives the locking sleeve 201 to rotate along the rotating shaft 102, and the locking sleeve 201 drives the locking hook 202 to rotate along the rotating shaft 102 until the locking hook 202 on the locking sleeve 201 hooks the locking platform 602 on the left frame 103 and the right frame 104, thereby locking the left frame 103 and the right frame 104 with the wheel fixing frame 6, and while the cross frame 2 is spread outwards, the locking groove 108 on the locking piece 105 connected to the other end of the cross frame 2 hooks the locking rod 501, and the cross frame 2 is fixed, so that the four-wheel vehicle can be used normally.

[0027] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A foldable four-wheeled vehicle, comprising a frame (1), a cross frame (2) mounted between the frames (1), and a handle (3) and a brake handle (4) mounted on the frames (1); a connecting rod (5) movably connected between the cross frame (2) and the frame (1); wherein: The bottom of the vehicle frame (1) is foldably mounted with a wheel fixing frame (6) and a wheel (601) mounted on the wheel fixing frame (6); the vehicle frame (1) is also mounted with a fixing seat (101); the fixing seat (101) is sleeved with a locking sleeve (201) which is connected to the cross frame (2) and can rotate when the cross frame (2) is opened or folded to lock or unlock the wheel fixing frame (6); and the wheel fixing frame (6) is provided with a locking platform (602) for facilitating the locking of the locking sleeve (201).

2. A foldable four-wheeled vehicle according to claim 1, characterized in that: A rotating shaft (102) for limiting the axial position of the locking sleeve (201) is also mounted on the fixing seat (101), so that the locking sleeve (201) can rotate along the rotating shaft (102).

3. A foldable four-wheeled vehicle according to claim 2, characterized in that: The locking sleeve (201) is provided with a locking hook (202) adapted to the locking platform (602).

4. The foldable four-wheeled vehicle according to claim 1, characterized in that: A rotating pin (603) is installed between the vehicle frame (1) and the wheel fixing frame (6), so that the wheel fixing frame (6) can be rotated and folded along the rotating pin (603).

5. The foldable four-wheeled vehicle according to claim 1, characterized in that: The vehicle frame (1) comprises a left vehicle frame (103) and a right vehicle frame (104) connected via a cross frame (2); a locking piece (105), an unlocking belt (106) connected to the locking piece (105), and a locking rod (501) arranged on a connecting rod (5) and capable of locking the cross frame (2) are movably mounted on the cross frame (2).

6. The foldable four-wheeled vehicle according to claim 5, characterized in that: The locking piece (105) is provided with a pressing rod (107) and a locking groove (108) adapted to the locking rod (501); a connecting pin (109) is installed between the locking piece (105) and the cross frame (2).

7. The foldable four-wheeled vehicle according to claim 6, characterized in that: A torsion spring (110) of an integrated structure is installed between the locking piece (105), the connecting pin (109) and the cross frame (2); one end of the torsion spring (110) is fixed between the connecting pin (109) and the cross frame (2), one end is fixed to the cross frame (2) and the locking piece (105), and the other end is sleeved on the pressure rod (107).

8. The foldable four-wheeled vehicle according to claim 5, characterized in that: A seat cushion (203) and an item placement box (204) are also installed on the cross frame (2); the unlocking belt (106) passes through the seat cushion (203) and is connected to locking pieces (105) on both sides of the cross frame (2).

9. The foldable four-wheeled vehicle according to claim 5, characterized in that: The left vehicle frame (103) is also provided with a crutch fixing clamp (111) for fixing the crutch.

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