Four-wheeled vehicle with static brakes

Abstract

The utility model discloses a four -wheeled vehicle with static brake contains a pedestal, a handle is set up in the pedestal, a seat pad is set up in the handle, several rear wheel assemblies are set up below the pedestal, several front wheel assemblies, and each front wheel assembly contains a wheel foot, at least one rotatable device under the state of pushing and automatic locking device under the state of stopping, a front wheel body and a brake adjusting device, one end of wheel foot is set up in the pedestal, one end of rotatable device under the state of pushing and automatic locking device under the state of stopping is pivoted to the other end of wheel foot, the other end of rotatable device under the state of pushing and automatic locking device under the state of stopping is rotatably set up in front wheel body, and brake adjusting device is set up in wheel foot, when front wheel body is in static state, brake adjusting device is attached to front wheel body, when front wheel body is in rolling state, rotatable device under the state of pushing and automatic locking device under the state of stopping are deflected so that brake adjusting device is not attached to front wheel body.

Description

Technical Field

[0001] This utility model relates to a four-wheeled vehicle, and more particularly to a four-wheeled vehicle with static brakes. Background Technology

[0002] Four-wheeled trolleys, such as walking aids, are widely used in hospitals, nursing homes, and long-term care centers. Their four-wheeled support structure provides stability, and a braking mechanism ensures safe use. Typically, four-wheeled trolleys have brake handles on both sides of the frame, connected to the brakes on each wheel via steel cables or brake lines to achieve braking. However, existing technology still has several drawbacks and shortcomings.

[0003] First, most existing four-wheeled trolleys use exposed brake cables, meaning the brake cables are laid along the outside of the frame and secured with buckles or clips. This exposed wiring is prone to wear, deformation, or loosening during pushing due to collisions with walls, bedside, or other equipment, affecting brake sensitivity and safety. Furthermore, exposed brake cables are easily contaminated with dust, bodily fluids, or cleaning agents in a medical environment, increasing cleaning difficulties and the risk of cross-infection.

[0004] Secondly, exposed brake cables may get caught on clothing, medical tubing, or assistive devices during patient use, causing accidental tripping or abnormal braking system failure. This risk is particularly pronounced for patients with limited mobility or slower reaction times, posing a threat to their safety.

[0005] Furthermore, the braking system of existing four-wheeled trolleys is inconvenient to repair. When the exposed brake lines are damaged or stuck, they must be replaced or adjusted by professionals, which increases maintenance costs and time. It may also cause the trolley to be unusable during the repair period, affecting the efficiency of medical operations.

[0006] In addition, existing designs mostly only improve the braking function, with insufficient improvements to the wiring and protection of the brake cables. As a result, even if the frame and wheelset have good structural strength, the overall safety is still limited by the insufficient durability and protection of the brake cables.

[0007] Therefore, the aforementioned problems and shortcomings need to be improved. Utility Model Content

[0008] In view of the shortcomings and deficiencies of the prior art, this utility model provides a four-wheeled vehicle with static braking, which achieves the purpose of braking in a static state by setting a rotating device between the front wheel body and the wheel foot in a pushing state and an automatic locking device in a stopping state, and setting a brake adjustment device at the wheel foot.

[0009] To achieve the above objectives, the technical means adopted by this utility model is to design a four-wheeled vehicle with static braking, which includes: A base; The top leader is positioned on this base; A cushion is placed on the handle; Several rear wheel assemblies are disposed below the base, and each rear wheel assembly includes a rotatable rear wheel body; Several front wheel assemblies, each front wheel assembly including a wheel mount, at least one rotatable device in a pushing state and an automatic locking device in a stopped state, a front wheel body, and a brake adjustment device. One end of the wheel mount is disposed below the base. One end of the rotatable device in a pushing state and the automatic locking device in a stopped state are pivotally connected to the other end of the wheel mount. The front wheel body is rotatably disposed at the other end of the rotatable device in a pushing state and the automatic locking device in a stopped state. The brake adjustment device is disposed on the wheel mount. When the front wheel body is stationary, the brake adjustment device is against the front wheel body. When the front wheel body is rolling, the rotatable device in a pushing state and the automatic locking device in a stopped state sway so that the brake adjustment device is not against the front wheel body.

[0010] Furthermore, in the four-wheeled vehicle with static brakes, the brake adjustment device includes a seat and a resistance fine-tuning device. The seat is located near the front wheel, and the resistance fine-tuning device is located on the seat and can selectively be attached to or separated from the front wheel.

[0011] Furthermore, in the four-wheeled vehicle with static brakes, the resistance fine-tuning device is a screw that passes through the seat and extends toward the front wheel.

[0012] Furthermore, in the four-wheeled vehicle with static brakes, the handlebar includes two telescopic tube assemblies and a grip bar. The two ends of the grip bar are respectively connected to one end of the two telescopic tube assemblies, which are height-adjustable and whose other ends are connected to the base.

[0013] Furthermore, in the aforementioned four-wheeled vehicle with static brakes, the base is provided with two diagonal rods. Each telescopic tube assembly includes an outer tube, an inner tube, a lower temporary locking device, and an upper temporary locking device. The front side of the outer tube is provided with several external fixing holes, which are spaced apart and extend along the axial direction of the outer tube. The front side of the inner tube is provided with several internal fixing holes, which are spaced apart and extend along the axial direction of the inner tube. One end of the outer tube is movably inserted through the corresponding diagonal rod, and the inner tube is movably inserted through the outer tube. The lower temporary locking device is provided on the corresponding diagonal rod and inserted through one of the external fixing holes of the outer tube. The upper temporary locking device is inserted through one of the external fixing holes of the outer tube and one of the internal fixing holes of the inner tube.

[0014] Furthermore, in the aforementioned four-wheeled vehicle with static brakes, the lower temporary locking device has a lower fixing plate and a lower fixing rod, the lower fixing rod protruding from one side of the lower fixing plate, the lower temporary locking device being pivotally mounted on the inclined rod with the lower fixing plate and the lower fixing rod passing through the outer fixing hole.

[0015] Furthermore, in the four-wheeled vehicle with static brakes, the upper temporary locking device has an upper fixing plate and an upper fixing rod. The upper fixing rod protrudes from one side of the upper fixing plate. The upper temporary locking device is pivotally mounted on the outer tube with the upper fixing plate and the upper fixing rod passes through the outer fixing hole located at the uppermost end.

[0016] Furthermore, in the four-wheeled vehicle with static braking, the base is provided with a segmented section, and a gravity auxiliary support rod is provided at the bottom of the seat cushion. One end of the gravity auxiliary support rod is pivotally connected to the seat cushion, and the other end of the gravity auxiliary support rod is provided to the segmented section.

[0017] Furthermore, in the four-wheeled vehicle with static braking, the segment has several slots arranged longitudinally at intervals, and the other end of the gravity assist support rod is located in one of the slots.

[0018] Furthermore, in the four-wheeled vehicle with static brakes, the base is provided with a retractable buckle device that can pivot relative to the base. Each rear wheel assembly further includes a rear foot, one end of which is pivotally mounted to the base, and the other end of which is provided with the rear wheel body. The rear foot can be positioned against the front or rear side by pivoting the retractable buckle device.

[0019] The advantages of this utility model are that it can achieve the braking effect without the use of the existing brake cable assembly. It is easy to maintain and clean, prevents the user's devices or clothing from being caught on the component and causing danger, increases service life and reduces usage costs. In addition, the user can adjust the braking sensitivity by rotating the resistance fine-tuning device to meet actual usage needs, which is highly convenient. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the present invention.

[0021] Figure 2 This is another perspective view of the present invention.

[0022] Figure 3 This is a side view of the present invention.

[0023] Figure 4 This is a cross-sectional view of the present invention.

[0024] Figure 5 This is a diagram showing the folded state of this utility model.

[0025] Figure 6 This is a diagram of the front wheel assembly in a stationary state according to this utility model.

[0026] Figure 7 This is a diagram of the front wheel assembly in its moving state according to this utility model.

[0027] Figure 8 This is an exploded view of the telescopic tube assembly of this utility model.

[0028] Figure 9 This is a schematic diagram illustrating the operation of this utility model. Detailed Implementation

[0029] The following, in conjunction with the accompanying drawings and preferred embodiments of the present invention, further illustrates the technical means employed by the present invention to achieve its intended purpose.

[0030] Please see Figure 1 As shown, the four-wheeled vehicle with static braking of this utility model includes a base 10, a handlebar 20, a seat cushion 30, several rear wheel assemblies 40 and several front wheel assemblies 50.

[0031] Please see Figure 1 and Figure 2 As shown, the base 10 includes two straight rods 11, two lower crossbars 12, a segment 13, an upper crossbar 14, two diagonal rods 15, and two reinforcing rods 16. The two straight rods 11 are arranged in parallel and connected by the two lower crossbars 12 to form a rectangular frame. The segment 13 has several segment slots 131 and is connected to the two lower crossbars 12. The segment slots 131 are arranged longitudinally at intervals. A receiving slot 111 is opened below each of the two straight rods 11. The receiving slot 111 is a long slot and extends in the axial direction of the straight rod 11. The two diagonal rods 15 are respectively inclined upward from one end of the straight rod 11. Extending, the upper horizontal bar 14 connects to two diagonal bars 15, and the two diagonal bars 15 are hollow rods. An opening 151 is formed in front of each diagonal bar 15, and the opening 151 extends in the axial direction of the diagonal bar 15. A lower locking part 152 is formed on the inner side wall of the diagonal bar 15 near the upper end of the opening 151. In this embodiment, the lower locking part 152 is a soft material with friction, but it is not limited thereto. Two reinforcing bars 16 are respectively connected to the straight bar 11 and the diagonal bar 15 on this side, but it is not limited thereto. The segmented part 13 may not be provided. The form of the base 10 can be changed according to the user's needs.

[0032] Please see Figure 1 , Figure 2 and Figure 8As shown, the handle 20 includes two telescopic tube assemblies 21 and a grip bar 22. The height adjustment assembly includes an outer tube 23, an inner tube 24, a lower temporary latching device 25, and an upper temporary latching device 26 in each telescopic tube assembly 21. Several external fixing holes 231 are provided on the front side of the outer tube 23. The external fixing holes 231 extend along the axial direction of the outer tube 23 and are arranged at intervals. An upper locking part 232 is formed on the inner sidewall of the upper end of the outer tube 23 near the front side. In this embodiment, the upper locking part 232 is made of a soft material with friction, but it is not limited to this. The inner tube 24 has several internal fixing holes 241 on its front side, and each internal fixing hole 241 extends along the axial direction of the inner tube 24 and is arranged at intervals. One end of the outer tube 23 is movably inserted into the inclined rod 15. The lower temporary locking device 25 has a lower fixing piece 251 and a lower fixing rod 252. The lower fixing rod 252 protrudes from one side of the lower fixing piece 251. The lower temporary locking device 25 has the lower fixing piece 251 pivotally mounted at the opening 151 of the inclined rod 15, and the lower fixing rod 252 can selectively pass through one of the external fixing holes 231. Please refer to [link / reference]. Figure 9 As shown, during adjustment, the lower fixing piece 251 can be flipped over and clamped and fixed by the lower locking part 152. Temporarily fixing the lower fixing piece 251 helps to adjust the height. The upper temporary locking device 26 has an upper fixing piece 261 and an upper fixing rod 262. The upper fixing rod 262 protrudes from one side of the upper fixing piece 261. The upper temporary locking device 26 has the upper fixing piece 261 pivotally mounted on the other end of the outer tube 23, and the upper fixing rod 262 can selectively pass through the outer fixing hole 231 located at the uppermost end. During adjustment, the upper fixing piece 261 can be flipped over and clamped and fixed by the upper locking part 232. Temporarily fixing the upper fixing piece 261 helps to adjust the height.

[0033] One end of the inner tube 24 is movably inserted into the outer tube 23, and the position of each inner fixing hole 241 corresponds to the position of each outer fixing hole 231. The upper fixing rod 262 can be selectively inserted into the outer fixing hole 231 and one of the inner fixing holes 241. The outer tube 23 can move up and down relative to the inclined rod 15 and its length is fixed by the lower temporary buckle device 25. The inner tube 24 can move up and down relative to the outer tube 23 and its length is fixed by the upper temporary buckle device 26.

[0034] The handle 22 is a U-shaped rod with its two ends fixed to the other ends of the inner tubes 24 on both sides. In this embodiment, the other end of the inner tube 24 is also provided with a socket 242. The socket 242 can be used to install an insert lighting device 243, but it is not limited thereto, and the socket 242 and the insert lighting device 243 may not be provided.

[0035] Please see Figure 1 , Figure 2 and Figure 4As shown, the two sides of the seat cushion 30 are fixed to the outer tube 23, and a gravity auxiliary support rod 31 is provided at the bottom of the seat cushion 30. The gravity auxiliary support rod 31 is a U-shaped rod with both ends pivotally mounted on the seat cushion 30. The gravity auxiliary support rod 31 can pivot relative to the seat cushion 30, and the gravity auxiliary support rod 31 can be selectively set in one of the grooves 131 of the segmented part 13 according to the height of the seat cushion 30, thereby achieving the function of bearing weight. A storage basket 32 ​​is provided at the bottom of the seat cushion 30, and a beverage placement device 33 is also provided on the side. However, this is not a limitation. The gravity auxiliary support rod 31, storage basket 32 ​​and beverage placement device 33 may not be provided, or they may be changed according to the user's needs.

[0036] Please see Figures 2 to 4 As shown, each rear wheel assembly 40 includes a rear foot 41, a rear link 42, a rear wheel body 43, a rear brake assembly 44, and a rear elastic member 45. One end of the rear foot 41 is pivotally mounted to the straight rod 11 of the base 10, and the rear link 42 is pivotally connected to the other end of the rear foot 41. The rear link 42 is a U-shaped bent plate, and there is an accommodating space between the two parallel plates formed therein. The rear wheel body 43 is rotatably disposed between the two plates and located at the rear end. The rear elastic member 45 is disposed between the two plates and located at the front end. The rear brake assembly 44 is disposed on the rear foot 41 adjacent to the rear wheel body 43. The rear brake assembly 44 can selectively abut against the rear wheel body 43 to prevent its rotation. This is a standard assembly in the prior art, and its detailed structure will not be described in detail. The rear wheel assembly 40 can achieve braking by pivoting the rear link 42 and abutting against the rear elastic member 45, allowing the rear wheel to selectively abut against the rear foot 41. Furthermore, please refer to... Figure 5 As shown, the rear leg 41 can be pivoted relative to the straight rod 11 to achieve the function of folding. A retractable fastening device 60 can be provided on the side of the straight rod 11. The retractable fastening device 60 has a foldable body that can be flipped, so that the retractable fastening device 60 can selectively abut against the front or rear side of the rear leg 41. Specifically, when the rear leg 41 is located in the receiving groove 111, the retractable fastening device 60 abuts against the front side of the rear leg 41 to fix it in place and prevents it from pivoting. When the rear leg 41 pivots towards the front, it can be fixed and folded by abutting against the rear side of the rear leg 41 through the retractable fastening device 60.

[0037] Please see Figure 2 , Figure 3 and Figure 6As shown, each front wheel assembly 50 includes a wheel base 51, at least one rotatable device in a pushing state and an automatic locking device 52 in a stopped state, a front wheel body 53, and a brake adjustment device 54. In this embodiment, the wheel base 51 consists of two parallel rods, one end of which is located below the base 10 and connected to the diagonal rod 15. The number of rotatable devices in a pushing state and automatic locking devices 52 in a stopped state are two, with one end of each pivotally connected to the other end of the wheel base 51. The front wheel body 53 is rotatably mounted in a pushing state. More specifically, the wheel center of the front wheel body 53 is connected to the other end of the device that can rotate in the two-push state and the device that can automatically lock in the stop state, so that the device that can rotate in the two-push state and the device that can automatically lock in the stop state are in an approximately vertical state when stationary, with the wheel center located between the two parallel rods of the wheel foot 51. However, this is not a limitation, and it can also be in the form of a device that can rotate in the single-push state and a device that can automatically lock in the stop state.

[0038] The brake adjustment device 54 includes a seat 541 and a resistance fine-tuning device 542. The seat 541 is located on the wheel base 51 near the front wheel body 53. The resistance fine-tuning device 542 is a screw that passes through the seat 541 and extends towards the front wheel body 53. When the front wheel body 53 is stationary, the resistance fine-tuning device 542 is against the front wheel body 53. When the front wheel body 53 is rolling, the rotatable device 52 in the pushing state and the automatic locking device 52 in the stopping state swing to make the resistance fine-tuning device 542 not against the front wheel body 53. The resistance fine-tuning device 542 can be rotated to fine-tune the distance between itself and the front wheel body 53, thereby changing the brake sensitivity.

[0039] This utility model has a stationary state and a moving state in use. Please refer to [link / reference]. Figure 6 As shown, when stationary, the rotatable device in the pushing state and the automatically locking device 52 in the stopped state are in a roughly vertical position. The resistance fine-tuning device 542 abuts against the front wheel body 53 to achieve the braking effect and prevent the present invention from moving; please refer to Figure 7As shown, when moving forward, if the user pushes the present invention, the rotatable device in the pushing state and the automatic locking device 52 in the stopped state will swing slightly backward, so that the front wheel 53 and the resistance fine-tuning device 542 are not in contact, thereby releasing the brake. Alternatively, the user can pull the present invention backward, so that the rotatable device in the pushing state and the automatic locking device 52 in the stopped state will swing slightly forward, releasing the brake. Therefore, the present invention can achieve the braking effect without the use of the existing brake cable assembly. It has the advantages of easy maintenance and cleaning, preventing the user's devices or clothing from being caught on the components and causing danger, increasing service life and reducing usage costs. In addition, the user can also adjust the braking sensitivity by rotating the resistance fine-tuning device 542 to meet actual usage needs, which is highly convenient.

[0040] In the aforementioned process, since the seat cushion 30 is equipped with a gravity-assisted support rod 31, the load-bearing capacity and stability of the seat cushion 30 can be improved, thereby enhancing the safety of use.

[0041] During the aforementioned process, the installation of the plug-in lighting device 243 provides illumination for nighttime use and enhances safety during nighttime movement.

[0042] In the aforementioned process, since the rear wheel assembly 40 can generate a braking function by the user pressing the present invention, the safety of the present invention can be further improved, and the braking function can be provided in different ways.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Anyone skilled in the art can make some modifications or alterations to the above-disclosed technical content as equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A four-wheeled vehicle with static braking, characterized in that, Include: A base; The top leader is positioned on this base; A cushion is placed on the handle; Several rear wheel assemblies are disposed below the base, and each rear wheel assembly includes a rotatable rear wheel body; Several front wheel assemblies, each front wheel assembly including a wheel mount, at least one rotatable device in a pushing state and an automatic locking device in a stopped state, a front wheel body, and a brake adjustment device. One end of the wheel mount is disposed below the base. One end of the rotatable device in a pushing state and the automatic locking device in a stopped state are pivotally connected to the other end of the wheel mount. The front wheel body is rotatably disposed at the other end of the rotatable device in a pushing state and the automatic locking device in a stopped state. The brake adjustment device is disposed on the wheel mount. When the front wheel body is stationary, the brake adjustment device is against the front wheel body. When the front wheel body is rolling, the rotatable device in a pushing state and the automatic locking device in a stopped state sway so that the brake adjustment device is not against the front wheel body.

2. The four-wheeled vehicle with static brakes as described in claim 1, characterized in that, The brake adjustment device includes a seat and a resistance fine-tuning device. The seat is located near the front wheel and the resistance fine-tuning device is located on the seat and can selectively be attached to or detached from the front wheel.

3. The four-wheeled vehicle with static brakes as described in claim 2, characterized in that, The resistance fine-tuning device is a screw that passes through the base and extends toward the front wheel body.

4. The four-wheeled vehicle with static braking as described in any one of claims 1 to 3, characterized in that, The handle includes two telescopic tube assemblies and a grip bar. The two ends of the grip bar are respectively connected to one end of the two telescopic tube assemblies. The two telescopic tube assemblies are height-adjustable and the other end is connected to the base.

5. The four-wheeled vehicle with static brakes as described in claim 4, characterized in that, The base is provided with two diagonal rods. Each telescopic tube assembly includes an outer tube, an inner tube, a lower temporary locking device, and an upper temporary locking device. The front side of the outer tube is provided with several external fixing holes, which are spaced apart and extend along the axial direction of the outer tube. The front side of the inner tube is provided with several internal fixing holes, which are spaced apart and extend along the axial direction of the inner tube. One end of the outer tube is movably inserted through the corresponding diagonal rod, and the inner tube is movably inserted through the outer tube. The lower temporary locking device is provided on the corresponding diagonal rod and inserted through one of the external fixing holes of the outer tube. The upper temporary locking device is inserted through one of the external fixing holes of the outer tube and one of the internal fixing holes of the inner tube.

6. The four-wheeled vehicle with static brakes as described in claim 5, characterized in that, The lower temporary locking device has a lower fixing piece and a lower fixing rod. The lower fixing rod protrudes from one side of the lower fixing piece. The lower temporary locking device is pivotally mounted on the inclined rod with the lower fixing piece and the lower fixing rod passes through the outer fixing hole.

7. The four-wheeled vehicle with static brakes as described in claim 5, characterized in that, The upper temporary buckle device has an upper fixing plate and an upper fixing rod. The upper fixing rod protrudes from one side of the upper fixing plate. The upper temporary buckle device is pivotally mounted on the outer tube with the upper fixing plate and the upper fixing rod passes through the outer fixing hole located at the uppermost end.

8. The four-wheeled vehicle with static brakes as described in claim 1, characterized in that, The base is provided with a segmented part, and a gravity auxiliary support rod is provided at the bottom of the seat cushion. One end of the gravity auxiliary support rod is pivotally connected to the seat cushion, and the other end of the gravity auxiliary support rod is provided to the segmented part.

9. The four-wheeled vehicle with static brakes as described in claim 8, characterized in that, The segment has several slots arranged longitudinally at intervals, and the other end of the gravity auxiliary support rod is located in one of the slots.

10. The four-wheeled vehicle with static brakes as described in claim 1, characterized in that, The base is provided with a retractable fastener device that can pivot relative to the base. Each rear wheel assembly further includes a rear foot, one end of which is pivotally mounted to the base and the other end of which is provided with the rear wheel body. The rear foot can be positioned against the front or rear side by pivoting the retractable fastener device.

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