A collapsible trike with anti-tip wheels

Abstract

The utility model discloses a collapsible three -wheel walking aid with anti -tilt wheel, including left support structure and right support structure, and the front end of left support structure and right support structure is installed with front wheel through first hinged structure, and the rear end is connected through connecting rod mechanism and realizes unfolding and folding, and the rear end of left support structure is installed with left rear wheel, and the rear end of right support structure is installed with right rear wheel, and one side of left support structure is equipped with left anti -tilt bar, and the end of left anti -tilt bar is installed with left anti -tilt wheel, and one side of right support structure is equipped with right anti -tilt bar, and the end of right anti -tilt bar is installed with right anti -tilt wheel, and this patent has the structure design of light and clever, and has the anti -tilt structure design, and the body is stable, portable, this patent is through the main body design of simplifying traditional three -wheel walking aid, and the whole is decomposed into left support structure and right support structure, and two support structures are connected through connecting rod mechanism to make the whole body can fold, and the volume is greatly reduced after folding, so that it becomes very convenient to be transported and carried.

Description

Technical Field

[0001] This utility model relates to the field of walking aid technology, and in particular to a foldable three-wheeled walking aid with anti-tilt wheels. Background Technology

[0002] Walking aids (walking trolleys) are assistive medical devices that help people with mobility impairments walk. Traditional three-wheeled walking aids are made very wide to achieve a wide support surface, making them less prone to tipping over. However, with the current trend towards lightweight designs, people are pursuing lightweight and portable designs that can be transported by vehicles. Most three-wheeled walking aids on the market today adopt a narrow-body design. This narrow-body design reduces the stability of the vehicle, especially the front, which is prone to swaying. Therefore, it is particularly important to design a narrow-body design that can maintain stability and also has folding characteristics for easy transport by vehicles. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a foldable three-wheeled walking vehicle with anti-tilt wheels to solve the technical problems mentioned in the background art.

[0004] To solve the technical problem, this utility model adopts the following technical solution: A foldable three-wheeled walking vehicle with anti-roll wheels includes a left support structure and a right support structure. The front ends of the left and right support structures are connected by a first hinge structure to install front wheels, and the rear ends are connected by a linkage mechanism to enable unfolding and folding. The rear end of the left support structure is equipped with a left rear wheel, and the rear end of the right support structure is equipped with a right rear wheel. A left anti-roll bar is provided on one side of the left support structure, and a left anti-roll wheel is installed at the end of the left anti-roll bar. A right anti-roll bar is provided on one side of the right support structure, and a right anti-roll wheel is installed at the end of the right anti-roll bar.

[0005] Specifically, the left support structure includes a left upper control arm, a left front control arm, and a left rear control arm distributed in a triangular fork structure, wherein the left rear wheel is installed at the left rear control arm, a left handrail is installed at the upper end of the left upper control arm, and the left anti-roll bar is located on one side of the left front control arm and extends to the left front. The right support structure includes a right upper control arm, a right front control arm, and a right rear control arm distributed in a triangular fork structure, wherein the right rear wheel is installed at the right rear control arm, a right handrail is installed at the upper end of the right upper control arm, and the right anti-roll bar is located on one side of the right front control arm and extends to the right front.

[0006] Specifically, the first hinge structure includes a left support rod, a right support rod, a hinge pin, a front fork, a first coupling, and a second coupling. The left and right front support arms are respectively connected to the left and right support rods on one side. The first coupling has a first shaft hole and a second shaft hole, wherein the hinge pin passes through the first shaft hole and the left support rod passes through the second shaft hole. The second coupling has a third shaft hole and a fourth shaft hole, wherein the hinge pin passes through the third shaft hole and the right support rod passes through the fourth shaft hole. The lower end of the hinge pin is hinged to the front fork. The front wheel is mounted on the lower end of the front fork. The second coupling is located between the two first couplings.

[0007] Specifically, the linkage mechanism includes a left lug, a right lug, a left connecting rod, a right connecting rod, a left bolt, a right bolt, and a middle bolt. The left lug and the right lug are respectively located on the inner sides of the left and right rear arms. One end of the left connecting rod is hinged to one end of the left lug via the left bolt. One end of the right connecting rod is connected to one end of the right lug via the right bolt. The other ends of the left and right connecting rods are hinged to the middle bolt.

[0008] Specifically, the right connecting rod is also provided with a limiting plate on the side near the middle bolt shaft. The working end of the limiting plate faces the front wheel. When the connecting rod mechanism transitions from the folded state to the unfolded state, the limiting plate limits the connecting rod mechanism to prevent it from continuing to fold in the opposite direction.

[0009] Specifically, both the left and right anti-roll bars include an upper support rod and a lower support rod. One end of the upper support rod is fixedly connected to the left or right front control arm, while the lower support rod is detachably connected to the other end of the upper support rod via a quick-release mechanism. The quick-release mechanism includes a C-shaped buckle assembly, a first insertion hole, and a second insertion hole. The upper support rod has a first insertion hole, and the lower support rod has a second insertion hole. The C-shaped buckle assembly includes a C-shaped buckle and a plug rod. The plug rod passes through the outside of the C-shaped buckle from the inside and is fixedly connected. When the lower support rod is inserted into the cavity of the upper support rod and the first and second insertion holes are aligned, the plug rod is simultaneously inserted into the first and second insertion holes, and the C-shaped buckle simultaneously wraps around and holds the outer periphery of the upper support rod.

[0010] Specifically, the front fork includes an axle joint and a wheel joint. The axle joint is located at the upper end and has a through groove structure. The inner side of the axle joint is provided with an annular axle edge. The upper and lower ends of the annular axle edge form an upper nesting position and a lower nesting position, respectively. The wheel joint has a symmetrically distributed forked structure. The front wheel is installed in the middle position of the forked structure through the front wheel axle. The lower end of the hinge bolt axle is fitted with an upper bearing and a lower bearing, wherein the upper bearing is nested in the upper nesting position and the lower bearing is nested in the lower nesting position.

[0011] Specifically, the lower support rod includes an upper straight connection part, a lower straight connection part, and a folding part. The upper straight connection part is located at the upper end and the second insertion hole is located at the upper straight connection part. The lower straight connection part is located at the lower end and the left or right anti-roll wheel is installed at the lower end of the lower straight connection part. The upper end of the folding part is connected to the upper straight connection part, the lower end is connected to the lower straight connection part, and the folding part has an outward folding angle relative to the upper straight connection part.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) This patent features a lightweight structural design with an anti-roll structure, ensuring vehicle stability and portability; (2) This patent simplifies the main design of the traditional three-wheeled walking cart by decomposing it into a left support structure and a right support structure. The two support structures are connected by a linkage mechanism so that the whole vehicle can be folded. After folding, the volume is greatly reduced, making it very convenient to transport and carry. At the same time, the warehousing and logistics costs for manufacturers are also greatly reduced. Attached Figure Description

[0013] Figure 1 : Axonometric view of the overall structure of the three-wheeled walking vehicle of this patent Figure 1 ; Figure 2 : Axonometric view of the overall structure of the three-wheeled walking vehicle of this patent Figure 2 ; Figure 3 : This is a side view of the overall structure of the three-wheeled walking vehicle of this patent; Figure 4 This is the second schematic diagram of the linkage mechanism in the three-wheeled walking vehicle of this patent. Figure 5 This is a breakdown of the linkage mechanism and the first articulated structure in the three-wheeled walking vehicle of this patent. Figure 6 This is a schematic diagram of the quick-release mechanism in the three-wheeled walking vehicle of this patent. Figure 7 : Axonometric view of the front fork structure in the three-wheeled walking vehicle of this patent Figure 1 ; Figure 8 : Axonometric view of the front fork structure in the three-wheeled walking vehicle of this patent Figure 2 ; Figure 9 : This is a front view of the overall structure of the three-wheeled walking vehicle of this patent; Figure 10 This is one of the reference images of the folded state of the three-wheeled walking vehicle of this patent; Figure 11 This is the second reference image of the folded state of the three-wheeled walking aid of this patent. Figure 12 This is the third reference image of the folded state of the three-wheeled walking aid of this patent; Figure 13: This is a reference diagram of the cloth bag structure installed on the three-wheeled walking vehicle of this patent; In the diagram: Left support structure 1A, right support structure 1B, first hinge structure 1C, front wheel 101, linkage mechanism 1D, left rear wheel 102, right rear wheel 103, left anti-roll bar 3, left anti-roll wheel 301, right anti-roll bar 4, right anti-roll wheel 401, left upper control arm 11, left front control arm 12, left rear control arm 13, left handrail 14, right upper control arm 21, right front control arm 22, right rear control arm 23, right handrail 24, left support rod 31, right support rod 32, hinge bolt 33, front fork 34, first coupling 35, second coupling 36, first shaft hole 351, second shaft hole 352, third shaft hole 361, fourth shaft hole 36 2. Left support lug 41, right support lug 42, left connecting rod 43, right connecting rod 44, left bolt shaft 45, right bolt shaft 46, middle bolt shaft 47, limiting piece 48, upper support rod 51, lower support rod 52, quick release mechanism 53, C-shaped buckle assembly 531, first insertion hole 511, second insertion hole 521, C-shaped buckle 531a, insertion rod 531b, shaft connection part 341, wheel connection part 342, annular shaft edge 343, upper nesting position 344, lower nesting position 345, forked structure 346, front wheel axle 30a, upper bearing 347, lower bearing 348, upper direct connection part 521, lower direct connection part 522, folding part 523, cloth bag 1E. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0015] refer to Figures 1 to 13 : This utility model discloses a foldable three-wheeled walking vehicle with anti-roll wheels, including a left support structure 1A and a right support structure 1B. The front ends of the left support structure 1A and the right support structure 1B are connected by a first hinge structure 1C to mount a front wheel 101, and their rear ends are connected by a linkage mechanism 1D to achieve unfolding and folding. A left rear wheel 102 is mounted on the rear end of the left support structure 1A, and a right rear wheel 103 is mounted on the rear end of the right support structure 1B. A left anti-roll bar 3 is provided on one side of the left support structure 1A, and a left anti-roll wheel 301 is mounted at the end of the left anti-roll bar 3. The right support structure... One side of structure 1B is provided with a right anti-roll bar 4, and the end of the right anti-roll bar 4 is equipped with a right anti-roll wheel 401. Unlike traditional three-wheeled vehicles with complex main structure designs, in this patent, the structure is integrated into the left support structure 1A and the right support structure 1B. The front ends of the two support structures are hinged to the front wheel 101, and the rear wheel is folded and unfolded through a linkage structure, which greatly simplifies the main structure and achieves a lightweight effect. In addition, with the design of the anti-roll structure, the left anti-roll wheel 301 and the right anti-roll wheel 401 extend to the position of the vehicle body near the front wheel 101, making the front of the vehicle body more stable.

[0016] Specifically, the left support structure 1A includes a left upper control arm 11, a left front control arm 12, and a left rear control arm 13 arranged in a triangular fork structure 346. The left rear wheel 102 is installed on the left rear control arm 13. A left handrail 14 is installed at the upper end of the left upper control arm 11. The left anti-roll bar 3 is located on one side of the left front control arm 12 and extends to the left front. The right support structure 1B includes a right upper control arm 21, a right front control arm 22, and a right rear control arm 23 arranged in a triangular fork structure 346. The right rear wheel 103 is installed at the right rear control arm 23. The upper end of the right upper control arm 21 is equipped with a right handrail 24. The right anti-roll bar 4 is located on one side of the right front control arm 22 and extends to the right front. Specifically, a braking system can also be installed at the position of the left handrail 14 or the right handrail 24 to facilitate speed control on downhill sections. In the aforementioned triangular fork structure 346, the supporting forces of the left and right sides of the vehicle body are concentrated in the triangular fork structure 346, making the structure more stable and simpler.

[0017] Specifically, the first hinge structure 1C includes a left support rod 31, a right support rod 32, a hinge pin 33, a front fork 34, a first coupling 35, and a second coupling 36. The left front support arm 12 and the right front support arm 22 are respectively connected to one side of the left support rod 31 and the right support rod 32. The first coupling 35 has a first shaft hole 351 and a second shaft hole 352, wherein the hinge pin 33 passes through the first shaft hole 351 and the left support rod 31 passes through the second shaft hole 352. The second coupling has a third shaft hole 361 and a fourth shaft hole 362, wherein the hinge pin 33 passes through... The third shaft hole 361 and the right support rod 32 pass through the fourth shaft hole 362. The lower end of the hinge bolt shaft 33 is hinged to the front fork 34. The front wheel 101 is installed at the lower end of the front fork 34. The second coupling member 36 is located between the two first coupling members 35. As mentioned above, the hinge between each coupling member and each support rod can be a bearing connection or a bolt damping structure connection. Here, the left support rod 31 and the right support rod 32 are both angled structures. One end of them is inserted into the left front support arm 12 or the right front support arm 22, and the other end is inserted into and hinged to the second shaft hole 352 or the fourth shaft hole 362.

[0018] Specifically, the linkage mechanism 1D includes a left lug 41, a right lug 42, a left connecting rod 43, a right connecting rod 44, a left bolt 45, a right bolt 46, and a middle bolt 47. The left lug 41 and the right lug 42 are respectively located on the inner sides of the left rear support arm 13 and the right rear support arm 23. One end of the left connecting rod 43 is hinged to one end of the left lug 41 via the left bolt 45. One end of the right connecting rod 44 is connected to one end of the right lug 42 via the right bolt 46. The other ends of the left connecting rod 43 and the right connecting rod 44 are hinged via the middle bolt 47. Preferably, the left lug 41, the right lug 42, the left connecting rod 43, and the right connecting rod 44 in the linkage mechanism 1D all adopt a double-plate design, so that each link has two hinge points, making the rotation more stable.

[0019] Specifically, in order to achieve unidirectional folding and unfolding, the right connecting rod 44 is provided with a limiting piece 48 on the side near the middle bolt 47. The functional end of the limiting piece 48 faces the front wheel 101. When the connecting rod mechanism 1D transitions from the folded state to the unfolded state, the limiting piece 48 limits the connecting rod mechanism 1D to prevent it from continuing to fold in the opposite direction. When unfolding, the limiting piece 48 restricts the unfolding stroke of the connecting rod mechanism 1D. When folding, because the two side structures are close together, they act as a stroke limit for folding.

[0020] Specifically, both the left anti-roll bar 3 and the right anti-roll bar 4 include an upper support rod 51 and a lower support rod 52. One end of the upper support rod 51 is fixedly connected to the left front control arm 12 or the right front control arm 22. The lower support rod 52 is detachably connected to the other end of the upper support rod 51 via a quick-release mechanism 53. The quick-release mechanism 53 includes a C-shaped buckle 531a assembly 531, a first insertion hole 511, and a second insertion hole 521. The upper support rod 51 has the first insertion hole 511, and the lower support rod 52 has the second insertion hole 521. The C-shaped buckle 531a assembly 531 includes a C-shaped buckle 531a and a plug rod 531b. The plug rod 531b passes through and is fixedly connected from the outside to the inside of the C-shaped buckle 531a. When the lower support rod 52 is inserted into the upper support rod 51, the lower support rod 52 is detachably connected to the upper support rod 51. When the first insertion hole 511 and the second insertion hole 521 are aligned within the cavity, the insertion rod 531b is simultaneously inserted into the first insertion hole 511 and the second insertion hole 521, and is simultaneously secured to the outer periphery of the upper support rod 51 by the C-shaped buckle 531a. Here, due to the circumferential gripping characteristic of the C-shaped buckle 531a, it can hold the outer periphery of the upper support rod 51 tightly, thereby preventing the insertion rod 531b from coming out of the first insertion hole 511 and the second insertion hole 521. Preferably, the end of the insertion rod 531b is provided with an enlarged area, which is made of soft material and its diameter is slightly larger than the diameter of the first insertion hole 511 and the second insertion hole 521. When the insertion rod 531b is inserted into the two insertion holes and reaches the outer side, the enlarged area acts as an anti-dislodgement function, which is equivalent to forming two anti-dislodgement mechanisms.

[0021] Specifically, the front fork 34 includes an axle connection portion 341 and a wheel connection portion 342. The axle connection portion 341 is located at the upper end and has a through groove structure. The inner side of the axle connection portion 341 is provided with an annular axle edge 343. The upper and lower ends of the annular axle edge 343 respectively form an upper nesting position 344 and a lower nesting position 345. The wheel connection portion 342 has symmetrically distributed forked structures 346. The front wheel 101 is mounted in the middle position of the forked structures 346 through the front wheel axle 30a. The lower end of the hinge bolt axle 33 is sleeved with an upper bearing 347. The upper bearing 347 is nested at the upper nesting position 344, and the lower bearing 348 is nested at the lower nesting position 345. Here, it is equivalent to having two shaft rotation mechanisms, the upper bearing 347 and the lower bearing 348. The annular shaft edge 343 is sandwiched between the two bearings, and the outer rings of the upper bearing 347 and the lower bearing 348 are nested on the upper nesting position 344 and the lower nesting position 345 respectively. The inner rings of the upper bearing 347 and the lower bearing 348 are sleeved on the hinge pin shaft 33. As a result, the rotation of the front fork 34 is more flexible and stable.

[0022] Specifically, the lower support rod 52 includes an upper straight connection part 521, a lower straight connection part 522, and a folding part 523. The upper straight connection part 521 is located at the upper end, and the second insertion hole 521 is located at the upper straight connection part 521. The lower straight connection part 522 is located at the lower end, and the left anti-roll wheel 301 or the right anti-roll wheel 401 is installed at the lower end of the lower straight connection part 522. The upper end of the folding part 523 is connected to the upper straight connection part 521, and the lower end is connected to the lower straight connection part 522. The folding part 523 has a relative position to the upper straight connection part 521. The outward folding angle of part 521 is an extension feature of this patent. Due to the detachability of the C-shaped buckle 531a component 531 and the outward folding characteristic of the upper direct connection part 521, when running on a normal smooth road surface, the lower support rod 52 can be rotated 180 degrees and then connected to the upper support rod 51 to reduce the support wheel distance between the two anti-tilt wheels, so as to obtain a faster pushing speed. When running on a bumpy road surface, the lower support rod 52 can be rotated 180 degrees to form a wide support wheel distance, which enhances its pushing stability.

[0023] When in use, a cloth bag 1E is also hung on the upper left arm 11 and the upper right arm 21 for use together.

[0024] It should be understood that the aforementioned bolt shaft is a shaft made of bolts (screws, nuts, washers, etc.).

[0025] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A foldable three-wheeled walking aid with anti-tilt wheels, characterized in that, It includes a left support structure and a right support structure. The front ends of the left and right support structures are equipped with front wheels through a first hinge structure, and the rear ends are connected by a linkage mechanism to enable unfolding and folding. The rear end of the left support structure is equipped with a left rear wheel, and the rear end of the right support structure is equipped with a right rear wheel. A left anti-roll bar is provided on one side of the left support structure, and a left anti-roll wheel is installed at the end of the left anti-roll bar. A right anti-roll bar is provided on one side of the right support structure, and a right anti-roll wheel is installed at the end of the right anti-roll bar.

2. A foldable three-wheeled walking aid with anti-tilt wheels as described in claim 1, characterized in that, The left support structure includes a left upper control arm, a left front control arm, and a left rear control arm distributed in a triangular fork structure, wherein the left rear wheel is installed at the left rear control arm, and a left handrail is installed at the upper end of the left upper control arm. The left anti-roll bar is located on one side of the left front control arm and extends to the left front. The right support structure includes a right upper control arm, a right front control arm, and a right rear control arm distributed in a triangular fork structure, wherein the right rear wheel is installed at the right rear control arm, and a right handrail is installed at the upper end of the right upper control arm. The right anti-roll bar is located on one side of the right front control arm and extends to the right front.

3. A foldable three-wheeled walking aid with anti-tilt wheels as described in claim 2, characterized in that, The first hinge structure includes a left support rod, a right support rod, a hinge pin, a front fork, a first coupling, and a second coupling. The left and right front support arms are respectively connected to the left and right support rods on one side. The first coupling has a first shaft hole and a second shaft hole, wherein the hinge pin passes through the first shaft hole and the left support rod passes through the second shaft hole. The second coupling has a third shaft hole and a fourth shaft hole, wherein the hinge pin passes through the third shaft hole and the right support rod passes through the fourth shaft hole. The lower end of the hinge pin is hinged to the front fork. The front wheel is mounted on the lower end of the front fork. The second coupling is located between the two first couplings.

4. A foldable three-wheeled walking aid with anti-tilt wheels as described in claim 1, characterized in that, The linkage mechanism includes a left lug, a right lug, a left connecting rod, a right connecting rod, a left bolt, a right bolt, and a middle bolt. The left lug and the right lug are respectively located on the inner sides of the left and right rear support arms. One end of the left connecting rod is hinged to one end of the left lug via the left bolt, and one end of the right connecting rod is connected to one end of the right lug via the right bolt. The other ends of the left and right connecting rods are hinged to the middle bolt.

5. A foldable three-wheeled walking aid with anti-tilt wheels as described in claim 4, characterized in that, The right connecting rod is also provided with a limiting plate on the side near the middle bolt shaft. The working end of the limiting plate faces the front wheel. When the connecting rod mechanism transitions from the folded state to the unfolded state, the limiting plate limits the connecting rod mechanism to prevent it from continuing to fold in the opposite direction.

6. A foldable three-wheeled walking aid with anti-tilt wheels as described in claim 1, characterized in that, Both the left and right anti-roll bars include an upper support rod and a lower support rod. One end of the upper support rod is fixedly connected to the left or right front control arm, while the lower support rod is detachably connected to the other end of the upper support rod via a quick-release mechanism. The quick-release mechanism includes a C-shaped buckle assembly, a first insertion hole, and a second insertion hole. The upper support rod has a first insertion hole, and the lower support rod has a second insertion hole. The C-shaped buckle assembly includes a C-shaped buckle and a plug rod. The plug rod passes through the outside of the C-shaped buckle from the inside and is fixedly connected. When the lower support rod is inserted into the cavity of the upper support rod and the first and second insertion holes are aligned, the plug rod is simultaneously inserted into the first and second insertion holes, and the C-shaped buckle simultaneously wraps around and holds the outer periphery of the upper support rod.

7. A foldable three-wheeled walking aid with anti-tilt wheels as described in claim 3, characterized in that, The front fork includes an axle joint and a wheel joint. The axle joint is located at the upper end and has a through groove structure. The inner side of the axle joint is provided with an annular axle edge. The upper and lower ends of the annular axle edge form an upper nesting position and a lower nesting position, respectively. The wheel joint has a symmetrically distributed forked structure. The front wheel is mounted in the middle position of the forked structure through the front wheel axle. The lower end of the hinge bolt axle is fitted with an upper bearing and a lower bearing, wherein the upper bearing is nested in the upper nesting position and the lower bearing is nested in the lower nesting position.

8. A foldable three-wheeled walking aid with anti-tilt wheels as described in claim 6, characterized in that, The lower support rod includes an upper straight connection part, a lower straight connection part, and a folding part. The upper straight connection part is located at the upper end and the second insertion hole is located at the upper straight connection part. The lower straight connection part is located at the lower end and the left anti-roll wheel or the right anti-roll wheel is installed at the lower end of the lower straight connection part. The upper end of the folding part is connected to the upper straight connection part, the lower end is connected to the lower straight connection part, and the folding part has an outward folding angle relative to the upper straight connection part.

Images