Parking device and walking aid

Abstract

The utility model discloses a kind of parking device and walking aid car, parking device includes connecting rod, wheel, telescopic component and control module.Wheel is rotatably connected to connecting rod, and the inner peripheral wall of wheel is equipped with multiple limit grooves, and multiple limit grooves are distributed along the circumference of wheel.Wheel is rotatably connected to connecting rod, and the inner peripheral wall of wheel is equipped with multiple limit grooves, and multiple limit grooves are distributed along the circumference of wheel.Telescopic component is installed in connecting rod.Control module is electrically connected with telescopic component, and control module is used to control telescopic component to insert or separate limit groove;When telescopic component inserts limit groove, wheel and connecting rod are relatively fixed.Walking aid car uses the parking device, when needing parking, wheel stops rotating, control module controls telescopic component to insert into limit groove, so that wheel and connecting rod are relatively fixed, and parking is completed;When not needing parking, control module controls telescopic component to separate limit groove, and wheel can rotate relative to connecting rod.When using the parking device, user can open parking mode or close parking mode through control module, avoid needing artificial control parking pedal, and it is convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of mobility aids, and in particular to a parking device and a mobility aid vehicle. Background Technology

[0002] Currently, infants, people with physical disabilities, the elderly, and post-operative rehabilitation patients may all use mobility aids such as strollers and wheelchairs for travel. These vehicles are basically parked by using a foot pedal to activate the parking mechanism. The parking switch is mostly installed at the rear of the vehicle. This type of parking requires the person to bend down and manually operate the parking pedal each time they park. In addition, some people with leg disabilities may need to seek assistance from others to park when using wheelchairs, which is inconvenient. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. To this end, this utility model proposes a parking device and a walking aid.

[0004] In a first aspect, this utility model provides a parking device, the parking device comprising:

[0005] link;

[0006] A wheel is rotatably connected to the connecting rod. The inner circumferential wall of the wheel has multiple limiting grooves distributed along the circumference of the wheel. The connecting rod is connected to a bearing, which passes through and connects to the wheel. The connecting rod, the bearing, and the wheel are coaxially arranged. The bearing includes an outer wheel, an inner wheel, and balls. The outer wheel is sleeved on and rotatably connected to the inner wheel. The balls are located between the inner circumferential wall of the outer wheel and the outer circumferential wall of the inner wheel. The outer wheel is fitted and fixedly connected to the inner circumferential wall of the wheel. The inner wheel is fixedly connected to the connecting rod.

[0007] A telescopic component is installed on the connecting rod, and the telescopic component can be inserted into or disengaged from the limiting groove; when the telescopic component is inserted into the limiting groove, the wheel and the connecting rod are relatively fixed.

[0008] According to some embodiments of the present invention, the parking device further includes a control module, which is electrically connected to the telescopic component and is used to control the telescopic component to insert into or disengage from the limiting groove.

[0009] According to some embodiments of the present invention, the telescopic component includes a driving component and a driving rod. The driving end of the driving component is connected to the driving rod. The driving component is located inside the inner wheel and is fixedly installed on the inner wheel. The driving component can drive the driving rod to move radially along the inner wheel so that the driving rod can be inserted into or disengaged from the limiting groove. The control module is electrically connected to the driving component.

[0010] According to some embodiments of the present invention, the outer peripheral wall of the inner wheel is provided with a first through hole communicating with the inner cavity of the inner wheel, and the drive rod can be inserted into the limiting groove through the first through hole.

[0011] According to some embodiments of the present invention, the outer peripheral wall of the inner wheel is provided with a countersunk hole, and the parking device further includes a bolt, which passes through the countersunk hole and is threadedly connected to the drive component.

[0012] According to some embodiments of the present invention, the connecting rod has an inner cavity, the inner cavity of the connecting rod is connected to the inner cavity of the inner wheel, the outer peripheral wall of the connecting rod is provided with a second through hole connected to the inner cavity of the connecting rod, and the wire of the control module can pass through the second through hole, the inner cavity of the connecting rod and the inner cavity of the inner wheel in sequence to be electrically connected to the drive component.

[0013] According to some embodiments of the present invention, the control module includes a fingerprint recognition module, a circuit board, and a power supply. The power supply is connected to the power supply interface of the circuit board, the fingerprint recognition module is electrically connected to the circuit board, and the driving component is electrically connected to the circuit board.

[0014] According to some embodiments of the present invention, the two wheels are rotatably connected to both ends of the connecting rod.

[0015] According to some embodiments of this utility model, the limiting groove is V-shaped or U-shaped.

[0016] The parking device according to the embodiments of this utility model has at least the following technical effects:

[0017] 1. When parking is required, the wheels stop rotating. The telescopic component is inserted into the limiting groove to fix the wheels and connecting rods relative to each other, thus completing the parking process.

[0018] 2. When parking is not required, the telescopic component is disengaged from the limit groove, allowing the wheels to rotate relative to the connecting rod.

[0019] 3. When using this parking device, users can open or close the parking mode by controlling the telescopic component, avoiding the need for manual operation of the parking pedal, which is convenient and quick.

[0020] Secondly, this utility model embodiment also provides a walking aid vehicle, including a parking device according to the first aspect embodiment of this utility model described above.

[0021] The walking aid according to this utility model embodiment has at least the following technical effects: When the walking aid uses this parking device, when parking is required, the wheels stop rotating, and the telescopic component is inserted into the limiting groove to fix the wheels and connecting rods relative to each other, thus completing parking. When parking is not required, the telescopic component is disengaged from the limiting groove, and the wheels can rotate relative to the connecting rods. Using this parking device, the user can activate or deactivate the parking mode by controlling the telescopic component, avoiding the need for manual operation of the parking pedal, making it convenient and quick.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the parking device according to some embodiments of the present invention;

[0025] Figure 2 This is a cross-sectional view of a portion of the structure of the parking device according to some embodiments of this utility model;

[0026] Figure 3 This is an exploded view of a portion of the structure of a parking device according to some embodiments of the present invention.

[0027] Icon labels:

[0028] Linkage 100; Second through hole 101; Wheel 110; Limiting groove 111;

[0029] Bearing 200; Ball bearing 210; Outer wheel 220; Inner wheel 230; First through hole 231; Countersunk hole 232; Bolt 240;

[0030] Telescopic component 300; Drive component 310; Drive rod 320;

[0031] Control module 400; fingerprint recognition module 410; circuit board 420; power supply 430; wire 440. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0037] According to some embodiments of this utility model, refer to Figures 1 to 3 The parking device includes a connecting rod 100, a wheel 110, a telescopic component 300, and a control module 400. The axis of the connecting rod 100 is oriented left-right. The wheel 110 is rotatably connected to the connecting rod 100. The inner circumferential wall of the wheel 110 has multiple limiting grooves 111, distributed circumferentially around the wheel 110. The multiple limiting grooves 111 improve the response speed and convenience of parking. When the wheel 110 stops, it does not need to be precisely rotated to a specific angle; a small rotation is sufficient to align one of the limiting grooves 111 with the telescopic component 300, thus quickly locking the vehicle. This increases the system's fault tolerance. The limiting groove 111 can be designed as a V-shaped or U-shaped groove to facilitate smooth insertion and engagement of the drive end of the telescopic component 300. The telescopic component 300 is mounted on the connecting rod 100. The control module 400 is electrically connected to the telescopic component 300. The control module 400 controls the insertion and disengagement of the telescopic component 300 into the limiting groove 111. When the telescopic component 300 is inserted into the limiting groove 111, the wheel 110 and the connecting rod 100 are relatively fixed. The connecting rod 100 is made of high-strength, lightweight metal materials, such as aluminum alloy or high-carbon steel, to ensure sufficient structural rigidity and load-bearing capacity while controlling the overall vehicle weight. The telescopic component 300 is the actuator, which converts electrical signals into precise linear mechanical motion.

[0038] Understandably, when the walking aid uses this parking device, when parking is required, the wheel 110 stops rotating, and the control module 400 controls the telescopic component 300 to insert into the limiting groove 111, fixing the wheel 110 and the connecting rod 100 relative to each other, thus completing parking. When parking is not required, the control module 400 controls the telescopic component 300 to disengage from the limiting groove 111, allowing the wheel 110 to rotate relative to the connecting rod 100. Using this parking device, the user can activate or deactivate the parking mode via the control module 400, avoiding the need for manual operation of the parking pedal, making it convenient and quick.

[0039] The control module 400 receives user commands and drives the telescopic component 300 via electrical signals. The extended end of the telescopic component 300 inserts into the limiting groove 111 on the inner wall of the wheel 110. Utilizing the principle of mechanical engagement, the rotating wheel 110 is rigidly connected to the fixed connecting rod 100, thereby achieving the purpose of parking brake. This transfers the parking operation from the mechanical pedal at the bottom of the wheel 110 to a readily accessible electronic control button or interface, greatly improving the user experience. This is especially beneficial for elderly people with difficulty bending over or disabled people who cannot operate with their feet, achieving barrier-free parking operation and possessing extremely high practical value.

[0040] According to some embodiments of this utility model, refer to Figures 1 to 3 A connecting rod 100 is connected to a bearing 200, which passes through and connects to the wheel 110. The connecting rod 100, bearing 200, and wheel 110 are coaxially arranged with their axes pointing left and right, significantly reducing the frictional resistance when the wheel 110 rotates. The use of bearing 200 ensures that the wheel 110 can roll smoothly, easily, and effortlessly, improving the overall driving performance of the walking aid. It also ensures rotational accuracy and stability. The coaxial arrangement of the connecting rod 100, bearing 200, and wheel 110 ensures that the wheel 110 will not wobble or sway during rotation, which is crucial for enhancing driving safety and ride comfort.

[0041] According to some embodiments of this utility model, refer to Figures 1 to 3The bearing 200 includes an outer wheel 220, an inner wheel 230, and balls 210. The outer wheel 220 is fitted and rotatably connected to the inner wheel 230. The balls 210 are located between the inner peripheral wall of the outer wheel 220 and the outer peripheral wall of the inner wheel 230. The outer wheel 220 is fitted and fixedly connected to the inner peripheral wall of the wheel 110. The inner wheel 230 is fixedly connected to the connecting rod 100. Since both the inner wheel 230 and the connecting rod 100 are stationary, the connecting rod 100 is fixedly mounted on the frame of the walking aid. The outer wheel 220 is fixedly connected to the inner peripheral wall of the wheel 110. The outer wheel 220 and the wheel 110 can be fixedly connected by interference fit, bonding, or screw fixing, and the outer wheel 220 can rotate with the wheel 110. The balls 210 roll between the inner and outer wheels 220, achieving low-friction rotation of the outer wheel 220 relative to the inner wheel 230. The stationary inner wheel 230 provides a mounting carrier for the telescopic component 300. The telescopic component 300 is built into the bearing 200 structure, making the entire wheel 110 structure more compact and more integrated. It can also effectively protect the internal precision components from damage caused by external dust, moisture and physical impact, and improve the reliability and durability of the parking system.

[0042] According to some embodiments of this utility model, refer to Figures 1 to 3 The telescopic component 300 includes a drive component 310 and a drive rod 320, with the drive end of the drive component 310 connected to the drive rod 320. The drive component 310 is located inside the inner wheel 230 and is fixedly installed thereon. The drive component 310 can drive the drive rod 320 to move vertically, i.e., it can drive the drive rod 320 to move radially along the inner wheel 230, allowing the drive rod 320 to insert into or disengage from the limiting groove 111. The control module 400 is electrically connected to the drive component 310. The drive component 310 is either a push rod motor or a linear solenoid valve. A push rod motor is a lead screw motor, which offers the advantages of providing greater thrust and precise position control, and typically self-locking after power failure, providing additional safety assurance—that is, even if there is an unexpected power failure after parking, the vehicle remains in a braking state. A linear solenoid valve, on the other hand, has the advantages of simple structure, fast response speed, and low cost, making it suitable for applications requiring rapid locking and unlocking.

[0043] According to some embodiments of this utility model, refer to Figures 1 to 3The outer peripheral wall of the inner wheel 230 is provided with a first through hole 231 communicating with the inner cavity of the inner wheel 230. The drive rod 320 can be inserted into the limiting groove 111 through the first through hole 231. The first through hole 231 extends axially through the right end face of the inner wheel 230, facilitating the assembly of the drive component 310 into the inner wheel 230 from right to left, and the drive rod 320 into the first through hole 231 from right to left, thus avoiding collision interference. The first through hole 231 is the channel through which the drive rod 320 extends out of the inner wheel 230 and engages with the limiting groove 111 of the wheel 110. During assembly, the drive component 310 is axially slid into the inner cavity of the inner wheel 230 from the right end face of the inner wheel 230 and fixed; then, the drive rod 320 can also be axially inserted into the drive component 310 from this side and pass through the first through hole 231. It avoids the need for complex and interference-prone lateral or multi-angle installation operations in narrow cavities, greatly simplifies the assembly process, reduces production costs, and effectively ensures the relative positional accuracy of each component after assembly. It avoids interference or jamming problems caused by assembly errors, thereby improving the qualification rate and operational reliability of the final product.

[0044] According to some embodiments of this utility model, refer to Figures 1 to 3 The inner wheel 230 has a countersunk hole 232 on its outer peripheral wall. The parking device also includes a bolt 240, which passes through the countersunk hole 232 and is threadedly connected to the drive component 310. The threaded connection via the bolt 240 provides high connection strength and good vibration resistance, ensuring that the drive component 310 will not loosen or shift during vehicle travel. Simultaneously, the threaded connection is detachable, facilitating subsequent maintenance or replacement of the drive component 310. Furthermore, the bolt 240 head is recessed into the countersunk hole 232, making its top surface lower than or flush with the outer peripheral wall of the inner wheel 230, preventing the bolt 240 head from protruding and scraping or interfering with other components.

[0045] According to some embodiments of this utility model, refer to Figures 1 to 3The connecting rod 100 has an inner cavity that communicates with the inner cavity of the inner wheel 230. The outer peripheral wall of the connecting rod 100 has a second through hole 101 communicating with the inner cavity of the connecting rod 100. The wire 440 of the control module 400 can sequentially pass through the second through hole 101, the inner cavity of the connecting rod 100, and the inner cavity of the inner wheel 230 to electrically connect to the drive component 310. The cooperation between the connecting rod 100 and the inner cavity creates an internal wiring channel from the frame to the drive component 310. The second through hole 101 is the entrance to this internal channel. After the wire 440 is led out from the control module 400 on the frame, it enters the inner cavity of the connecting rod 100 through the second through hole 101. The wire 440 sequentially passes through the inner cavity of the connecting rod 100 and the inner cavity of the inner wheel 230, finally connecting to the drive component 310. This built-in wiring method prevents the wire 440 from being exposed, eliminating the impact of physical damage and environmental corrosion on the wiring and improving its service life. This prevents users from touching the wire 440 and also prevents the wire 440 from getting caught in moving parts such as the wheel 110.

[0046] According to some embodiments of this utility model, refer to Figures 1 to 3 The control module 400 includes a fingerprint recognition module 410, a circuit board 420, and a power supply 430. The power supply 430 is connected to the power supply interface of the circuit board 420, the fingerprint recognition module 410 is electrically connected to the circuit board 420, and the drive component 310 is electrically connected to the circuit board 420. The circuit board 420 is responsible for processing input signals and outputting control commands. The power supply 430 is a rechargeable lithium battery or a replaceable battery, providing power to the entire system. The fingerprint recognition module 410 has a high level of security and anti-theft functions. Only authorized users' fingerprints can lock or unlock the vehicle, effectively preventing the risk of strollers or wheelchairs being accidentally operated or stolen by others. The fingerprint recognition module 410 system can register multiple authorized fingerprints, enabling joint management by family members or caregivers. Compared to passwords or keys, fingerprint recognition is unique and cannot be copied, and it is more convenient to use, requiring no memorization or carrying of extra items, making it easy for the elderly to use.

[0047] According to some embodiments of this utility model, refer to Figures 1 to 3 Two wheels 110 are rotatably connected to both ends of the connecting rod 100. Each wheel 110 has an independent bearing 200, drive component 310, and drive rod 320, and both drive components 310 are controlled by the same control module 400. Simultaneous parking of both wheels 110 provides stronger and more balanced braking force. Locking both drive wheels simultaneously effectively prevents the vehicle from rotating or skidding while parked, especially on slopes, where safety is far superior to single-wheel braking. It also enhances system redundancy and reliability. Even if one parking device malfunctions, the other can still provide some braking capability, avoiding the risk of complete failure.

[0048] The workflow of this embodiment includes:

[0049] When a user needs to stop the walking aid, they place their finger on the fingerprint recognition module 410, which is installed in a convenient location such as the handrail, on the control module 400. The fingerprint recognition module 410 collects fingerprint information and sends it to the internal circuit board 420. The microprocessor on the circuit board 420 compares the collected fingerprint with a pre-stored authorized fingerprint database. If the fingerprint verification is successful, the circuit board 420 confirms that the operation is by an authorized user and generates a "park" command. Subsequently, the circuit board 420 outputs a corresponding drive current or voltage signal to the wire 440 connected to the drive component 310. This electrical signal enters the hollow inner cavity of the connecting rod 100 through the second through hole 101 on the outer peripheral wall of the connecting rod 100 via the wire 440. The wire 440 extends along the inner cavity of the connecting rod 100 to both ends and passes through the inner cavity of the inner wheel 230 of the bearing 200, which communicates with the inner cavity of the connecting rod 100, and finally reliably connects to the electrical interface of the drive component 310 fixed inside the inner wheel 230. Throughout the transmission process, the wire 440 is protected by the connecting rod 100 and the inner wheel 230, completely isolated from the outside world. The drive component 310, installed in the bearings 200 of the left and right wheels 110 and the inner wheel 230, immediately actuates upon receiving an electrical signal. The drive end of the drive component 310 pushes the drive rod 320, causing it to move radially along the inner wheel 230, passing through the first through hole 231 on the outer peripheral wall of the inner wheel 230, and extending outwards. At this time, the wheels 110 of the walking aid may be stationary or moving slowly under the user's control. With a slight rotation of the wheel 110, one of the multiple circumferentially distributed limiting grooves 111 on its inner peripheral wall will quickly align with the extended drive rod 320. The end of the drive rod 320 smoothly inserts into the limiting groove 111, forming a secure mechanical engagement. Since the other end of the drive rod 320 is connected to the fixed drive component 310, and the drive component 310 is firmly fixed to the inner wheel 230 fixed to the connecting rod 100 by bolts 240, this engagement creates a relatively fixed connection between the originally freely rotating wheel 110 and the stationary connecting rod 100. The parking devices of the left and right wheels 110 complete this action synchronously, thereby firmly locking the entire walking vehicle in place and completing the parking process.

[0050] In this specification, the reference to the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A parking device, characterized in that, include: Linkage (100); A wheel (110) is rotatably connected to the connecting rod (100). The inner circumferential wall of the wheel (110) is provided with multiple limiting grooves (111), which are distributed circumferentially along the wheel (110). A bearing (200) is connected to the connecting rod (100), passing through and connecting to the wheel (110). The connecting rod (100), the bearing (200), and the wheel (110) are coaxially arranged. The bearing (200) includes an outer wheel (220), an inner wheel (230), and balls (210). The outer wheel (220) is sleeved and rotatably connected to the inner wheel (230). The balls (210) are located between the inner peripheral wall of the outer wheel (220) and the outer peripheral wall of the inner wheel (230). The outer wheel (220) is fitted and fixedly connected to the inner peripheral wall of the wheel (110). The inner wheel (230) is fixedly connected to the connecting rod (100). A telescopic component (300) is installed on the connecting rod (100), and the telescopic component (300) can be inserted into or disengaged from the limiting groove (111); when the telescopic component (300) is inserted into the limiting groove (111), the wheel (110) and the connecting rod (100) are relatively fixed.

2. The parking device according to claim 1, characterized in that, The parking device also includes a control module (400), which is electrically connected to the telescopic component (300) and is used to control the telescopic component (300) to insert into or disengage from the limiting groove (111).

3. The parking device according to claim 2, characterized in that, The telescopic component (300) includes a drive component (310) and a drive rod (320). The drive end of the drive component (310) is connected to the drive rod (320). The drive component (310) is located inside the inner wheel (230) and is fixedly installed on the inner wheel (230). The drive component (310) can drive the drive rod (320) to move radially along the inner wheel (230) so that the drive rod (320) can be inserted into or disengaged from the limiting groove (111). The control module (400) is electrically connected to the drive component (310).

4. The parking device according to claim 3, characterized in that, The outer peripheral wall of the inner wheel (230) is provided with a first through hole (231) communicating with the inner cavity of the inner wheel (230), and the drive rod (320) can be inserted into the limiting groove (111) through the first through hole (231).

5. The parking device according to claim 3, characterized in that, The outer peripheral wall of the inner wheel (230) is provided with a countersunk hole (232), and the parking device also includes a bolt (240), which passes through the countersunk hole (232) and is threadedly connected to the drive component (310).

6. The parking device according to claim 3, characterized in that, The connecting rod (100) has an inner cavity, which is connected to the inner cavity of the inner wheel (230). The outer peripheral wall of the connecting rod (100) is provided with a second through hole (101) that is connected to the inner cavity of the connecting rod (100). The wire (440) of the control module (400) can pass through the second through hole (101), the inner cavity of the connecting rod (100) and the inner cavity of the inner wheel (230) in sequence to be electrically connected to the drive component (310).

7. The parking device according to claim 3, characterized in that, The control module (400) includes a fingerprint recognition module (410), a circuit board (420) and a power supply (430). The power supply (430) is connected to the power supply interface of the circuit board (420), the fingerprint recognition module (410) is electrically connected to the circuit board (420), and the driving component (310) is electrically connected to the circuit board (420).

8. The parking device according to claim 1, characterized in that, The two wheels (110) are rotatably connected to the two ends of the connecting rod (100).

9. The parking device according to claim 1, characterized in that, The limiting groove (111) is V-shaped or U-shaped.

10. A walking aid, characterized in that, It includes a parking device as described in any one of claims 1 to 9.

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