Three-wheel rollator

Abstract

A three-wheel rollator comprises a frame, the frame comprises a front fork, a first frame body and a second frame body, the first frame body and the second frame body are arranged left and right, hinge mechanisms are arranged among the first frame body, the second frame body and the front fork, and the first frame body and the second frame body are mutually folded or unfolded left and right through the hinge mechanisms. According to the three-wheel rollator, the hinging mechanisms are arranged among the first frame body, the second frame body and the front fork, the first frame body and the second frame body are mutually folded or unfolded left and right through the hinging mechanisms, and the hinging mechanisms are rotationally matched with the hinging shafts through the hinging pieces, so that the first frame body and the second frame body are mutually hinged; the matching friction between the hinge piece and the hinge shaft is small, so that after the first frame body and the second frame body are used for a long time or rotated, folded and unfolded for multiple times, the hinge mechanism is basically not damaged to cause looseness of the first frame body and the second frame body, and the stability of the frame and the long-term use experience of a user are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of rehabilitation equipment technology, and in particular to a three-wheeled walking aid. Background Technology

[0002] like Figure 12 As shown, a traditional tricycle includes a left frame 101 and a right frame 102. The right frame 102 is clamped and fixed by a mounting base 103 at its front. The left frame 101 and the right frame 102 are fixed to the riser tube 104 at the front of the frame by fork screws. The left frame 101 and the right frame 102 can rotate on the mounting base 103, so that the left frame 101 and the right frame 102 move closer to each other or further away from each other, so as to realize the folding or unfolding of the tricycle.

[0003] The problem is that the mounting bracket 103 is generally made of plastic. After long-term use or after repeated rotation, folding and unfolding, the mounting bracket 103 is prone to damage, which can cause the left frame 101 and right frame 102 to loosen. This is not conducive to the stability of the frame and the long-term user experience, and has certain limitations. Therefore, it is necessary to make further improvements. Utility Model Content

[0004] The purpose of this utility model is to provide a three-wheeled walking vehicle that is simple in structure, easy to carry and store, occupies little space, is convenient to use, and is highly practical, so as to overcome the shortcomings of the existing technology.

[0005] A three-wheeled walking vehicle designed for this purpose includes a frame, the frame including a front fork and a first frame and a second frame arranged on the left and right, characterized in that: a hinge mechanism is provided between the first frame, the second frame and the front fork, and the first frame and the second frame can be folded or unfolded to each other on the left and right through the hinge mechanism.

[0006] The hinge mechanism includes a first hinge member disposed at the front end of the first frame, a second hinge member disposed at the front end of the second frame, and a hinge shaft assembly disposed on the front fork. The hinge shaft assembly is rotatably connected to the first hinge member and the second hinge member respectively, so that the first frame and the second frame are hinged to each other.

[0007] The hinge shaft assembly includes a hinge shaft, a rotating shaft, and a bushing. The hinge shaft and the rotating shaft are connected in a mating manner. The bushing is fixedly fitted onto the hinge shaft. A first hinge member is provided with a first hinge hole, and a second hinge member is provided with a second hinge hole. The bushing is rotatably connected to the first hinge hole and the second hinge hole, respectively.

[0008] The two shaft sleeves are arranged on the hinge shafts in an up-down manner, the first hinge member is provided with first hinge portions arranged in an up-down manner, each first hinge portion corresponds to a shaft sleeve, a first hinge hole is arranged on each first hinge portion, and each first hinge hole is rotationally connected with a corresponding shaft sleeve; the second hinge member is provided with second hinge portions, a second hinge hole is arranged on each second hinge portion, and each second hinge hole is rotationally connected with a corresponding shaft sleeve.

[0009] The second hinge portions are arranged between the two first hinge portions, and a gasket is arranged between each second hinge portion and the two first hinge portions.

[0010] The top of the hinge shaft is provided with a gland, the shaft sleeve on the upper part of the hinge shaft is arranged between the gland and the first hinge portion, and the shaft sleeve on the lower part of the hinge shaft is arranged between the hinge shaft and the second hinge portion.

[0011] The upper end of the front fork is provided with bearings arranged in an up-down manner, the bearings are rotationally connected with the rotating shaft, so that the front fork is rotationally arranged on the hinge shaft assembly, the lower end of the front fork is provided with a front wheel, and the rear ends of the first frame body and the second frame body are respectively provided with rear wheels.

[0012] A limiting connection mechanism is arranged between the first frame body and the second frame body, the first frame body and the second frame body are connected through the limiting connection mechanism, and the limiting connection mechanism rotationally limits the first frame body and the second frame body when the first frame body and the second frame body are folded or unfolded left and right relative to each other.

[0013] The limiting connection mechanism comprises first folding arms and second folding arms rotationally connected with each other, the first folding arms are rotationally connected with the first frame body, the second folding arms are rotationally connected with the second frame body, the first frame body and the second frame body drive the first folding arms and the second folding arms to be folded relative to each other when the first frame body and the second frame body are folded left and right relative to each other, and the first frame body and the second frame body drive the first folding arms and the second folding arms to be unfolded relative to each other when the first frame body and the second frame body are unfolded left and right relative to each other.

[0014] The first folding arms are provided with limiting grooves, the second folding arms are provided with limiting ribs, the limiting ribs are inserted into the limiting grooves, and the limiting ribs are limited to move on the limiting grooves when the first folding arms and the second folding arms are rotationally connected with each other, so as to rotationally limit the first folding arms and the second folding arms.

[0015] The limiting connection mechanism further comprises a locking assembly arranged between the first folding arms and the second folding arms, the locking assembly comprises a pressing member, a locking member and an elastic member, the first folding arms are provided with non-circular first locking grooves, the second folding arms are provided with non-circular second locking grooves, the elastic member is arranged between the locking member and the first folding arms, the pressing member is movably arranged on the second folding arms, and the bottom of the pressing member is pressed on the locking member.

[0016] When the pressing member is in a standby state, the locking member is locked between the first locking grooves and the second locking grooves under the elastic force of the elastic member, so as to lock the first folding arms and the second folding arms relative to each other.

[0017] The pressing of the pressing piece drives the locking piece to move to the first locking groove to unlock the first folding arm and the second folding arm.

[0018] The storage bag is further included, the first frame body comprises a first cross beam and a first vertical rod arranged above the first cross beam, the second frame body comprises a second cross beam and a second vertical rod arranged above the second cross beam, the left and right sides of the storage bag are respectively provided with a first lug and a second lug, the first lug is sleeved on the first vertical rod, and the second lug is sleeved on the second vertical rod, so that the storage bag is fixed on the frame.

[0019] The upper end of the first vertical rod is provided with a first handle, and the upper end of the second vertical rod is provided with a second handle.

[0020] The three-wheeled walking aid of the utility model is provided with a hinge mechanism between the first frame body, the second frame body and the front fork, the first frame body and the second frame body are folded or unfolded left and right through the hinge mechanism, the hinge mechanism is matched through the rotation of the hinge piece and the hinge shaft, the first frame body and the second frame body are hingedly connected to each other, the matching friction of the hinge piece and the hinge shaft is small, so that after the first frame body and the second frame body are used for a long time or are folded and unfolded for many times, the hinge mechanism will not be damaged to cause the loosening of the first frame body and the second frame body, and the stability of the frame and the long-term use experience of the user are improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an overall structure schematic view of the three-wheeled walking aid unfolded in an embodiment of the utility model.

[0022] Figure 2 It is an overall structure schematic view of the three-wheeled walking aid folded in an embodiment of the utility model.

[0023] Figure 3 It is a sectional view of the three-wheeled walking aid unfolded in an embodiment of the utility model.

[0024] Figure 4 It is Figure 3 It is an enlarged structure schematic view of the position C.

[0025] Figure 5 It is a partial structure schematic view of the hinge mechanism in an embodiment of the utility model.

[0026] Figure 6 It is an exploded structure schematic view of the hinge mechanism in an embodiment of the utility model.

[0027] Figure 7 It is an overall structure schematic view of the three-wheeled walking aid unfolded from another direction in an embodiment of the utility model.

[0028] Figure 8The sectional view of the limiting connection mechanism when the pressing piece is in the waiting state in an embodiment of the utility model.

[0029] Figure 9 The sectional view of the limiting connection mechanism when the pressing piece is pressed in an embodiment of the utility model.

[0030] Figure 10 The exploded structural schematic view of the limiting connection mechanism in an embodiment of the utility model.

[0031] Figure 11 The overall structural schematic view of the second folding arm in an embodiment of the utility model.

[0032] Figure 12 The overall structural schematic view of the traditional three-wheel walking aid. DETAILED DESCRIPTION

[0033] The utility model will be further described below in combination with the drawings and embodiments.

[0034] Reference Figures 1-11 , the three-wheel walking aid, including frame 1, frame 1 includes front fork 49 and left and right first frame body 2, second frame body 3, first frame body 2, second frame body 3 and front fork 49 are provided with hinge mechanism A, first frame body 2 and second frame body 3 are folded or unfolded left and right through hinge mechanism A, when carrying or storing three-wheel walking aid, first frame body 2 and second frame body 3 can be folded left and right, when using three-wheel walking aid, first frame body 2 and second frame body 3 can be unfolded left and right;Front fork 49 is arranged at the front end of first frame body 2 and second frame body 3;The three-wheel walking aid can be applied to the field of rehabilitation equipment.

[0035] Hinge mechanism A includes first hinge piece 4 arranged at the front end of first frame body 2, second hinge piece 5 arranged at the front end of second frame body 3 and hinge shaft assembly 6 arranged on front fork 49, hinge shaft assembly 6 is respectively connected with first hinge piece 4, second hinge piece 5 rotationally connected to make first frame body 2 and second frame body 3 hinge each other;First hinge piece 4 is welded at the front end of first frame body 2, second hinge piece 5 is welded at the front end of second frame body 3, and then hinge shaft assembly 6 is respectively connected with first frame body 2 and second frame body 3 rotationally connected.

[0036] Hinge shaft assembly 6 includes hinge shaft 7, rotating shaft 8 and shaft sleeve 9, hinge shaft 7 and rotating shaft 8 are connected, shaft sleeve 9 is fixedly sleeved on hinge shaft 7, first hinge hole 10 is arranged on first hinge piece 4, second hinge hole 11 is arranged on second hinge piece 5, shaft sleeve 9 is respectively connected with first hinge hole 10 and second hinge hole 11 rotationally connected, hinge shaft 7 and rotating shaft 8 are mutually inserted.

[0037] The shaft sleeve 9 is arranged two and arranged on the hinge shaft 7 up and down, the first hinge piece 4 is arranged with the first hinge part 12 distributed up and down, the first hinge part 12 corresponds to the shaft sleeve 9, the first hinge hole 10 is arranged on the first hinge part 12, the first hinge hole 10 is rotatably connected with the corresponding shaft sleeve 9, the second hinge piece 5 is arranged with the second hinge part 13, the second hinge hole 11 is arranged on the second hinge part 13, and the second hinge hole 11 is rotatably connected with each shaft sleeve 9.

[0038] The second hinge part 13 is located between the two first hinge parts 12, and the second hinge part 13 is arranged with the gasket 14 between the two first hinge parts 12, respectively. The first hinge piece 4 and the second hinge piece 5 are made of metal material, and the gasket 14 can prevent the first hinge piece 4 and the second hinge piece 5 from rubbing and causing wear when rotating.

[0039] The top of the hinge shaft 7 is provided with a gland 47, the shaft sleeve 9 of the upper part of the hinge shaft 7 is arranged between the gland 47 and the first hinge part 12, and the shaft sleeve 9 of the lower part of the hinge shaft 7 is arranged between the hinge shaft 7 and the second hinge part 13.

[0040] The upper end of the front fork 49 is provided with a bearing mounting hole 18, the bearing mounting hole 18 is arranged with the bearings 15 distributed up and down, the bearings 15 are rotatably connected with the rotating shaft 8, so that the front fork 49 is rotatably arranged on the hinge shaft assembly 6, thereby realizing the steering of the front wheel 16, that is, realizing the steering of the three-wheeled scooter, the lower end of the front fork 49 is provided with the front wheel 16, and the rear ends of the first frame body 2 and the second frame body 3 are respectively provided with the rear wheels 17.

[0041] The first frame body 2 and the second frame body 3 are arranged with the limiting connection mechanism B, the first frame body 2 and the second frame body 3 are connected through the limiting connection mechanism B, when the first frame body 2 and the second frame body 3 are folded or unfolded left and right, the limiting connection mechanism B limits the rotation of the first frame body 2 and the second frame body 3, prevents the first frame body 2 and the second frame body 3 from rotating excessively, and simultaneously makes the first frame body 2 and the second frame body 3 not naturally rotate after being folded or unfolded left and right.

[0042] The limiting connection mechanism B includes the first folding arm 28 and the second folding arm 29 rotatably connected with each other, the first folding arm 28 is hingedly connected with the first frame body 2, and the second folding arm 29 is hingedly connected with the second frame body 3; when the first frame body 2 and the second frame body 3 are folded left and right, the first folding arm 28 and the second folding arm 29 are folded, and when the first frame body 2 and the second frame body 3 are unfolded left and right, the first folding arm 28 and the second folding arm 29 are unfolded.

[0043] The limiting connecting mechanism B further comprises a locking assembly arranged between the first folding arm 28 and the second folding arm 29, the locking assembly comprising a pressing piece 30, a locking piece 31 and an elastic piece 32, the elastic piece 32 being a spring, the first folding arm 28 being provided with a non-circular first locking groove 33, the second folding arm 29 being provided with a non-circular second locking groove 34, the locking piece 31, the first locking groove 33 and the second locking groove 34 being of the same shape and in the form of a cam, the elastic piece 32 being arranged between the locking piece 31 and the first folding arm 28, the pressing piece 30 being movably arranged on the second folding arm 29, the bottom of the pressing piece 30 being pressed on the locking piece 31.

[0044] When the pressing piece 30 is in the standby state, the locking piece 31 is locked between the first locking groove 33 and the second locking groove 34 under the elastic force of the elastic piece 32, that is, the lower part of the locking piece 31 is located in the first locking groove 33, and the upper part of the locking piece 31 is located in the second locking groove 34, so as to lock the first folding arm 28 and the second folding arm 29 relative to each other, at this time, the first folding arm 28 and the second folding arm 29 cannot rotate relative to each other.

[0045] When the pressing piece 30 is pressed downward, the locking piece 31 is moved downward to the first locking groove 33, so as to unlock the first folding arm 28 and the second folding arm 29, at this time, the first folding arm 28 and the second folding arm 29 can rotate relative to each other.

[0046] When the first folding arm 28 rotates, the locking piece 31 rotates, when the first folding arm 28 and the second folding arm 29 are folded relative to each other, when the pressing piece 30 is released, since the locking piece 31, the first locking groove 33 and the second locking groove 34 are non-circular, the horizontal positions of the locking piece 31 and the second locking groove 34 do not coincide, so that the locking piece 31 cannot move upward into the second locking groove 34.

[0047] When the first folding arm 28 and the second folding arm 29 are unfolded relative to each other, at this time, the horizontal positions of the locking piece 31 and the second locking groove 34 coincide, when the pressing piece 30 is released, the locking piece 31 moves upward to reset under the elastic force of the elastic piece 32, and then the locking piece 31 returns to the position between the first locking groove 33 and the second locking groove 34.

[0048] The first folding arm 28 is provided with a positioning column 37, the locking piece 31 and the elastic piece 32 are respectively sleeved on the positioning column 37, the positioning column 37 is provided with a first mounting hole 38, the second folding arm 29 is provided with a second mounting hole 39, a screw 47 passes through the first mounting hole 38 and the second mounting hole 39 in sequence, the tail of the screw 47 is locked with a nut 48, and then the first folding arm 28 and the second folding arm 29 are rotationally connected.

[0049] A plurality of limiting buckles 40 are arranged annularly on the lower part of the pressing piece 30, a plurality of through holes 41 are arranged annularly on the second folding arm 29, the limiting buckles 40 are arranged on the through holes 41, the limiting buckles 40 can move up and down on the through holes 41, the second folding arm 29 is provided with a limiting surface 42 at the position on both sides of the bottom of the through hole 41, the limiting buckles 40 are arranged on the limiting surface 42 after the pressing piece 30 is moved upward and reset, so as to prevent the pressing piece 30 from being separated from the second folding arm 29; the limiting buckles 40 are pressed on the locking piece 31.

[0050] The first folding arm 28 is provided with a limiting groove 35, the second folding arm 29 is provided with a limiting rib 36, the limiting rib 36 is inserted into the limiting groove 35, when the first folding arm 28 and the second folding arm 29 rotate relative to each other, the limiting rib 36 is limited to move on the limiting groove 35, so as to limit the rotation of the first folding arm 28 and the second folding arm 29, the first folding arm 28 and the second folding arm 29 can rotate 180 degrees relative to each other at most, so that the first frame body 2 and the second frame body 3 can rotate 180 degrees relative to each other at most.

[0051] Further comprising a storage bag 19, the first frame body 2 comprises a first cross beam 26 and a first vertical rod 20 arranged above the first cross beam 26, the second frame body 3 comprises a second cross beam 27 and a second vertical rod 21 arranged above the second cross beam 27, the left and right sides of the storage bag 19 are respectively provided with a first lug 22 and a second lug 23, the first lug 22 is sleeved on the first vertical rod 20, the second lug 23 is sleeved on the second vertical rod 21, so as to fix the storage bag 19 on the frame 1.

[0052] The upper end of the first vertical rod 20 is provided with a first handle 24, and the upper end of the second vertical rod 21 is provided with a second handle 25.

[0053] The first hinge 4 is arranged at the front end of the first cross beam 26, the second hinge 5 is arranged at the front end of the second cross beam 27, and the rear wheels 17 are arranged at the rear ends of the first cross beam 26 and the second cross beam 27 respectively; the first cross beam 26 and the first vertical rod 20 are welded with each other, and the second cross beam 27 and the second vertical rod 21 are welded with each other.

[0054] One end of the first folding arm 28 is connected with a first connecting rod 43, the upper part of the first vertical rod 20 is provided with a first lug 44, the first connecting rod 43 and the first lug 44 are hingedly connected with each other through a hinge shaft, one end of the second folding arm 29 is connected with a second connecting rod 45, the upper part of the second vertical rod 21 is provided with a second lug 46, and the second connecting rod 45 and the second lug 46 are hingedly connected with each other through a hinge shaft.

[0055] The above is the preferred scheme of the utility model, and the basic principle, main features and advantages of the utility model are displayed and described. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only for illustrating the principle of the utility model. The utility model can have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A three-wheeled walking vehicle, comprising a frame (1), the frame (1) including a front fork (49) and a first frame (2) and a second frame (3) arranged on the left and right sides, characterized in that: A hinge mechanism (A) is provided between the first frame (2), the second frame (3) and the front fork (49). The first frame (2) and the second frame (3) can be folded or unfolded to each other by the hinge mechanism (A). The hinge mechanism (A) includes a first hinge member (4) disposed at the front end of the first frame (2), a second hinge member (5) disposed at the front end of the second frame (3), and a hinge shaft assembly (6) disposed on the front fork (49). The hinge shaft assembly (6) is rotatably connected to the first hinge member (4) and the second hinge member (5) respectively, so that the first frame (2) and the second frame (3) are hinged to each other. The hinge shaft assembly (6) includes a hinge shaft (7), a rotating shaft (8), and a bushing (9). The hinge shaft (7) and the rotating shaft (8) are connected in a fitment. The bushing (9) is fixedly fitted on the hinge shaft (7). The first hinge member (4) is provided with a first hinge hole (10), and the second hinge member (5) is provided with a second hinge hole (11). The bushing (9) is rotatably connected to the first hinge hole (10) and the second hinge hole (11) respectively.

2. The three-wheeled walking aid according to claim 1, characterized in that: Two bushings (9) are provided and are respectively positioned on the hinge shaft (7) one above the other. The first hinge member (4) is provided with a first hinge part (12) distributed vertically. The first hinge part (12) corresponds to the bushing (9) one by one. The first hinge hole (10) is provided on the first hinge part (12). The first hinge hole (10) is rotatably connected to the corresponding bushing (9). The second hinge member (5) is provided with a second hinge part (13). The second hinge hole (11) is provided on the second hinge part (13). The second hinge hole (11) is rotatably connected to each bushing (9). The second hinge (13) is located between the two first hinges (12), and a gasket (14) is provided between the second hinge (13) and the two first hinges (12).

3. The three-wheeled walking aid according to claim 1, characterized in that: A pressure cap (47) is provided on the top of the hinge shaft (7). The bushing (9) on the upper part of the hinge shaft (7) is pressed between the pressure cap (47) and the first hinge part (12). The bushing (9) on the lower part of the hinge shaft (7) is pressed between the hinge shaft (7) and the second hinge part (13).

4. The three-wheeled walking aid according to claim 1, characterized in that: The upper end of the fork (49) is equipped with bearings (15) distributed vertically. The bearings (15) are rotatably connected to the rotating shaft (8) so that the fork (49) is rotatably mounted on the hinge shaft assembly (6). The lower end of the fork (49) is provided with a front wheel (16). The rear ends of the first frame (2) and the second frame (3) are respectively provided with rear wheels (17).

5. The three-wheeled walking aid according to claim 1, characterized in that: A limiting connection mechanism (B) is provided between the first frame (2) and the second frame (3). The first frame (2) and the second frame (3) are connected by the limiting connection mechanism (B). When the first frame (2) and the second frame (3) are folded or unfolded to the left or right, the limiting connection mechanism (B) limits the rotation of the first frame (2) and the second frame (3).

6. The three-wheeled walking aid according to claim 5, characterized in that: The limiting connection mechanism (B) includes a first folding arm (28) and a second folding arm (29) that are rotatably connected to each other. The first folding arm (28) is hinged to the first frame (2), and the second folding arm (29) is hinged to the second frame (3). When the first frame (2) and the second frame (3) fold to each other left and right, the first folding arm (28) and the second folding arm (29) fold to each other. When the first frame (2) and the second frame (3) unfold to each other left and right, the first folding arm (28) and the second folding arm (29) unfold to each other. The first folding arm (28) is provided with a limiting groove (35), and the second folding arm (29) is provided with a limiting rib (36). The limiting rib (36) is inserted into the limiting groove (35). When the first folding arm (28) and the second folding arm (29) rotate relative to each other, the limiting rib (36) is limited to move on the limiting groove (35) to limit the rotation of the first folding arm (28) and the second folding arm (29).

7. The three-wheeled walking aid according to claim 6, characterized in that: The limiting connection mechanism (B) also includes a locking component disposed between the first folding arm (28) and the second folding arm (29). The locking component includes a pressing member (30), a locking member (31), and an elastic member (32). The first folding arm (28) is provided with a non-circular first locking groove (33), and the second folding arm (29) is provided with a non-circular second locking groove (34). The elastic member (32) is disposed between the locking member (31) and the first folding arm (28). The pressing member (30) is movably disposed on the second folding arm (29), and the bottom of the pressing member (30) presses against the locking member (31). When the pressing part (30) is in the waiting state, the locking part (31) is locked between the first locking groove (33) and the second locking groove (34) under the elastic force of the elastic part (32) so as to lock the first folding arm (28) and the second folding arm (29) together. When the pressing member (30) is pressed, it causes the locking member (31) to move onto the first locking groove (33) to unlock the first folding arm (28) and the second folding arm (29).

8. The three-wheeled walking aid according to claim 1, characterized in that: It also includes a storage bag (19), the first frame (2) includes a first crossbeam (26) and a first vertical bar (20) set above the first crossbeam (26), the second frame (3) includes a second crossbeam (27) and a second vertical bar (21) set above the second crossbeam (27), the storage bag (19) is provided with a first lug (22) and a second lug (23) on the left and right sides respectively, the first lug (22) is fitted on the first vertical bar (20), and the second lug (23) is fitted on the second vertical bar (21), thereby fixing the storage bag (19) on the frame (1); The upper end of the first vertical bar (20) is equipped with a first handle (24), and the upper end of the second vertical bar (21) is equipped with a second handle (25).

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