Wheelchair and electric vehicle head connecting device

Abstract

The invention relates to the technical field of wheelchairs, in particular to a wheelchair and electric vehicle head connecting device which comprises a rear connecting mechanism, a front connecting mechanism and an aligning mechanism, the rear connecting mechanism, the front connecting mechanism and the aligning mechanism form a connecting component set, and the connecting component set is used for quickly connecting a wheelchair body and an electric vehicle head. Rapid and reliable connection and separation of the wheelchair and the electric vehicle head are achieved through a simplified mechanical interface without tools, the integrated aligning mechanism automatically aligns the vehicle head so as to relieve the operation burden, and the driving safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wheelchairs, in particular to a wheelchair and electric car head connecting device. BACKGROUND

[0002] The combination of traditional manual wheelchair and independent electric power-assisted car head provides a flexible electric travel solution for users. The common connection method on the market usually relies on simple pins, clamps or straps to mechanically fix the steering column of the electric car and the wheelchair frame.

[0003] However, such existing connection solutions have many inconveniences and potential hazards in use. First of all, the connection process is often cumbersome, requiring users to accurately align multiple hole positions and manually tighten the bolts, which is not user-friendly for users with limited upper limb strength or flexibility. Secondly, simple mechanical fixation is prone to looseness under long-term use or bumpy road conditions, causing the connection to shake or make noise, affecting the stability and safety of control. More notably, most traditional connection devices only achieve physical coupling without any steering assistance function. After completing the steering, users need to manually return the car head to the straight line to maintain straight-line travel, which increases the operation burden; if the user's hands are temporarily away from the controller, the vehicle may deviate from the straight line due to the front wheels not being returned, which poses a safety risk. In addition, poor universality is also a big problem, as many connectors can only adapt to specific models of wheelchairs or car heads, limiting the application range of the product. SUMMARY

[0004] In order to overcome the above technical problems, the purpose of the present application is to provide a wheelchair and electric car head connecting device to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: A wheelchair and electric car head connecting device, comprising a wheelchair body and an electric car head, the electric car head comprising a head inner shaft, wherein it further comprises: a rear connecting mechanism for connecting with the wheelchair body; a front connecting mechanism for connecting with the electric car head, the front connecting mechanism comprising a front arm body and a clamping assembly provided thereon, the clamping assembly being detachably clamped and matched with the rear connecting mechanism to realize quick connection and locking of the wheelchair body and the electric car head; a return mechanism connected between the head inner shaft of the electric car head and the front connecting mechanism for applying an automatic return force to the head inner shaft; a release mechanism comprising an operating push member and a steel wire, the steel wire connecting the operating push member and being linked with the clamping assembly and the return mechanism respectively; wherein operating the push member can synchronously drive the clamping assembly to release the locking of the rear connecting mechanism and drive the return mechanism to release the return constraint of the head inner shaft through the steel wire.

[0006] Preferably, the rear connecting mechanism comprises a rear arm body, which is mounted to the bottom of the wheelchair body through adjustable connecting member one and connecting member two, and the end of the rear arm body away from the wheelchair body is provided with a main clamping rod and a hook.

[0007] Preferably, the front connecting mechanism further comprises a front connecting member adjustably mounted to the head shell of the electric vehicle head, and the front arm body is connected to the front connecting member.

[0008] Preferably, the clamping assembly comprises a clamping box, which is provided with a slot for the main clamping rod to enter and a side hanging member matched with the hook, and the inside of the clamping box is provided with a rotatable hook clamping member and a metal spring member for driving the hook clamping member to have a locking tendency, and the hook clamping member is provided with a clamping groove for clamping the main clamping rod.

[0009] Preferably, the clamping assembly is provided with an inner connecting rod one connected with the steel wire, and the push clamping member is operated to drive the hook clamping member to rotate through the steel wire and the inner connecting rod one to release the clamping of the main clamping rod.

[0010] Preferably, the returning mechanism comprises a pneumatic spring member and an end box mechanism, one end of the pneumatic spring member is connected to the inner shaft of the head, and the other end is releasably connected to the end box mechanism, and the end box mechanism is mounted to the front connecting mechanism.

[0011] Preferably, the pneumatic spring member is used to accumulate returning force when the inner shaft of the head is turned, and drive the inner shaft of the head to automatically return to the straight driving position after the turning operation is completed.

[0012] Preferably, the end box mechanism comprises an end box body and a vertical clamping member and a horizontal clamping member arranged in the end box body, the vertical clamping member is connected with one end of the pneumatic spring member, and is matched with the horizontal clamping member through a clamping groove to realize locking.

[0013] Preferably, the horizontal clamping member is connected with a secondary wire member, the secondary wire member is connected with the steel wire of the releasing mechanism, and when the push clamping member is operated, the steel wire pulls the horizontal clamping member to move through the secondary wire member to release the locking of the vertical clamping member.

[0014] Preferably, the connection position between the front connecting member and the head shell is adjustable, so that the front connecting mechanism can adapt to electric vehicle heads of different specifications.

[0015] Preferably, the connecting member one and the connecting member two are connected with the wheelchair body through bolts to realize the adjustment of the mounting position of the rear arm body.

[0016] Preferably, the clamping assembly further comprises an inner connecting rod two, which is connected between the inner connecting rod one and the hook clamping member.

[0017] Compared with the prior art, the present application has the following advantages: Through the simplified mechanical interface design, the user can complete the reliable connection and separation between the wheelchair, the connecting device and the electric car head without tools, significantly reducing the operation complexity and physical requirements, especially facilitating independent operation of users with limited upper limb strength; The multi-point and multi-direction locking mechanism ensures that the connection part does not loosen or shake during driving, so that the wheelchair and the car head form a rigid whole, which not only eliminates the control delay and abnormal sound caused by the connection gap, but also provides more direct and accurate steering feedback; The integrated return mechanism can automatically and smoothly restore the electric car head to the straight driving position after the user finishes the steering operation, which reduces the user's burden of continuously manually correcting the direction and effectively prevents accidental deviation caused by the direction not being returned, thereby enhancing the driving safety; Adopting the modular design idea, the core frame of the connecting device remains unchanged, while the key interface components for connecting different wheelchair frames and electric car heads can be flexibly adjusted or replaced, which enables a single set of device to adapt to multiple specifications of products, improving the application range and economy; When the user operates the unlocking mechanism to separate the electric car head, the return mechanism will automatically release its return force maintaining state, which avoids the return mechanism still applying force to the connection part during disassembly, making the separation action more smooth and smooth, without the need for additional steps to manually release the return function, further optimizing the overall user experience. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the connection component group structure of the present application Figure 1 ; Figure 3 is a schematic diagram of the structure of the front and rear connecting mechanisms of the present application; Figure 4 is a schematic diagram of the structure of the release mechanism part of the present application; Figure 5 is a schematic diagram of the connection component group structure of the present application Figure 2 ; Figure 6 is a schematic diagram of the structure of the return mechanism part of the present application; Figure 7 is a schematic diagram of the cross-sectional structure of the return mechanism part of the present application; Figure 8 is a schematic diagram of the internal structure of the return mechanism of the present application.

[0019] In the figure: 11, wheelchair body; 12, electric car head; 121, car head shell; 122, car head inner shaft; 02, rear connecting mechanism; 21, rear arm body; 22, connecting piece one; 23, connecting piece two; 24, hook piece; 25, main clamping rod; 03, front connecting mechanism; 31, front arm body; 32, front connecting piece; 33, clamping assembly; 331, clamping box; 3311, notch; 332, side hanging piece; 333, inner connecting rod one; 334, inner connecting rod two; 335, hook clamping piece; 336, metal spring piece; 34, release mechanism; 341, push clamping piece; 342, seat body; 04, self-righting mechanism; 41, pneumatic spring piece; 42, end box mechanism; 421, end box body; 422, vertical clamping piece; 423, horizontal clamping piece; 424, guide sleeve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] An embodiment provided by the present application comprises: Reference Figure 1 And Figure 2 A wheelchair and electric car head connecting device comprises a wheelchair body 11 and an electric car head 12. The bottom of the wheelchair body 11 is provided with a bottom cross frame and main side frames. The electric car head 12 comprises a car head shell 121 and a car head inner shaft 122. The top end of the car head inner shaft 122 is connected to a handlebar, and the bottom end of the car head inner shaft 122 is connected to a wheel. The device further comprises: Reference Figure 2 A rear connecting mechanism 02, a front connecting mechanism 03 and a self-righting mechanism 04. The rear connecting mechanism 02, the front connecting mechanism 03 and the self-righting mechanism 04 form a linking component group, and the linking component group is used for quickly connecting the wheelchair body 11 and the electric car head 12. Reference Figure 2 And Figure 5 The self-righting mechanism 04 is installed on the front connecting mechanism 03, and is used for self-righting the car head inner shaft 122. When the rear connecting mechanism 02 and the front connecting mechanism 03 are disconnected, the self-righting is released.

[0022] The rear connecting mechanism 02 is installed at the bottom of the wheelchair body 11, and the rear connecting mechanism 02 comprises a rear arm body 21, one end of the rear arm body 21 is connected with a connecting piece one 22, the connecting piece one 22 is used for connecting the bottom cross frame of the wheelchair body 11, the rear arm body 21 is adjustably installed with a connecting piece two 23, the connecting piece two 23 is connected with the rear arm body 21 through bolts, and the connecting piece two 23 is used for connecting the main side frame of the wheelchair body 11, and the end of the rear arm body 21 away from the connecting piece one 22 is connected with a main clamping rod 25 and a hook piece 24.

[0023] The front connecting mechanism 03 comprises a front arm body 31, one end of the front arm body 31 is adjustably connected with a front connecting piece 32, the front connecting piece 32 is connected with the front arm body 31 through bolts, the end of the front arm body 31 away from the front connecting piece 32 is connected with a clamping assembly 33, and the front connecting mechanism 03 further comprises a releasing mechanism 34, the releasing mechanism 34 comprises a pushing piece 341 and a seat body 342, the pushing piece 341 is rotationally connected with the seat body 342, the seat body 342 is connected with the handlebar at the top end of the inner shaft 122 of the vehicle head, and the pushing piece 341 is connected with a steel wire.

[0024] The clamping assembly 33 comprises a clamping box 331, the clamping box 331 is provided with a notch 3311 corresponding to the main clamping rod 25, the clamping box 331 is provided with a side hanging piece 332 corresponding to the hook piece 24, the side hanging piece 332 is in contact with the hook piece 24, and the clamping box 331 is provided with an inner connecting rod one 333, an inner connecting rod two 334, a hooking piece 335 and a metal spring piece 336.

[0025] The middle part of the inner connecting rod one 333 is rotationally connected with the clamping box 331 through a rotating shaft, the top end of the inner connecting rod one 333 is slidingly connected with the clamping box 331, the bottom end of the inner connecting rod one 333 is connected with the steel wire, one end of the inner connecting rod two 334 is connected with the inner connecting rod one 333, the other end of the inner connecting rod two 334 is rotationally connected with the hooking piece 335, the hooking piece 335 is provided with a clamping groove corresponding to the main clamping rod 25, and the metal spring piece 336 is connected between the clamping box 331 and the hooking piece 335.

[0026] It should be noted that the connection between the front connecting piece 32 and the vehicle head shell 121 is through bolts, and the front connecting piece 32 can be adjusted in the position height installed on the vehicle head shell 121, thereby meeting various use conditions.

[0027] The back-to-normal mechanism 04 is connected between the inner shaft 122 of the vehicle head and the front connecting piece 32, and the back-to-normal mechanism 04 comprises a pneumatic spring piece 41 and an end box mechanism 42, one end of the pneumatic spring piece 41 is connected with the inner shaft 122 of the vehicle head, and the other end of the pneumatic spring piece 41 is detachably connected with the end box mechanism 42. The end box mechanism 42 includes an end box body 421. A vertical locking member 422 is in contact with the end box body 421 through a groove. A horizontal locking member 423 is connected to the vertical locking member 422 through a slot. A guide sleeve 424 is provided on one side of the horizontal locking member 423. The end box body 421 is connected to the front connecting member 32 by bolts. One end of the vertical locking member 422 is connected to a pneumatic spring member 41. The guide sleeve 424 is installed inside the end box body 421. A secondary wire member is movably disposed inside the guide sleeve 424. One end of the auxiliary wire component is connected to the horizontal clamp 423, and the other end of the auxiliary wire component is connected to the steel wire. When the steel wire is pulled, it drives the auxiliary wire component to move. The auxiliary wire component will pull the horizontal clamp 423 out of contact with the slot of the vertical clamp 422, thereby releasing the constraint on the vertical clamp 422. At this time, rotating the inner shaft 122 of the car head will not automatically return to the center position. After the rear connecting mechanism 02 and the front connecting mechanism 03 are separated, it is convenient to adjust the rotation angle of the inner shaft 122 of the car head, which is convenient for subsequent storage or relocation.

[0028] Working principle: The core working principle of this solution lies in using an integrated mechanical linkage system to achieve rapid connection and locking between the electric drive unit and the wheelchair body, and to simultaneously release the automatic steering return function upon separation. The entire process can be divided into the following two core stages: I. Connection and Automatic Locking Process When it is necessary to connect the electric vehicle head 12 to the wheelchair body 11, the user moves the head of the vehicle so that the snap-fit ​​component 33 of the front connecting mechanism 03 is aligned with the rear connecting mechanism 02.

[0029] Guiding and positioning: The hook 24 on the rear connecting mechanism 02 first engages with the side hanger 332 of the snap-fit ​​assembly 33 for initial positioning and suspension. At the same time, the main locking rod 25 on the rear arm body 21 slides into the slot 3311 of the card box 331.

[0030] Triggering and Locking: During the entry of the main locking lever 25, it presses against the hook locking component 335, forcing the hook locking component 335 to overcome the tension of the metal spring component 336 and rotate counterclockwise around the axis (towards...). Figure 3 (For reference only). When the main locking rod 25 is fully engaged, the hook locking piece 335 quickly returns to its original position clockwise under the restoring force of the metal spring piece 336, and its groove firmly holds the main locking rod 25, forming the main locking point. At this time, the synchronous hook piece 24 and the suspension cooperation of the side hanging piece 332 further enhance the lateral stability of the connection, thereby completing a quick and secure connection.

[0031] II. Separation and Return-to-Order Decoupling Process When separation is required, the user can operate the release mechanism 34 with one hand to trigger the chain reaction of unlocking and returning to center.

[0032] Main unlocking trigger: push the push button 341 on the handlebar to rotate it counterclockwise (with reference to Figure 4 the figure). This action pulls the steel wire and in turn rotates the inner connecting rod 333 in the clamping assembly 33.

[0033] Quick release mechanism unlocking: the inner connecting rod 333 transmits the rotation to the hooking member 335 through the inner connecting rod 334, so that it rotates counterclockwise again. The clamping groove of the hooking member 335 is disengaged from the constraint of the main clamping rod 25, and the main locking point is released. At this time, the electric vehicle head 12 can be pressed down to make the side hanging member 332 and the hooking member 24 disengage, thereby realizing the separation of the rear connecting mechanism 02 and the front connecting mechanism 03.

[0034] Return-to-normal mechanism linkage release: in the above process, the movement of the same steel wire acts on the return-to-normal mechanism 04 synchronously. The steel wire drives the auxiliary wire member in the guide sleeve 424, pulls the horizontal clamping member 423 to the left (with reference to Figure 7 the figure), compresses the spring and disengages from the clamping groove of the vertical clamping member 422.

[0035] Function failure and free steering: once the horizontal clamping member 423 is unlocked, the vertical clamping member 422 is no longer constrained by the end box body 421. At this time, one end of the pneumatic spring member 41 connected with the vertical clamping member 422 is disengaged, and its automatic return-to-normal function is immediately disabled. The inner shaft 122 of the vehicle head can rotate freely and no longer has a return-to-normal force, greatly facilitating the steering adjustment, movement and storage of the electric vehicle head 12 after separation.

[0036] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A wheelchair-electric motor connection device, comprising a wheelchair body and an electric motor, wherein the electric motor includes an inner axle, characterized in that, Also includes: Rear connection mechanism for connection with the wheelchair body; A front connection mechanism for connecting to the electric vehicle head, the front connection mechanism includes a forearm body and a snap-fit ​​component disposed thereon, the snap-fit ​​component being detachably snap-fitted into the rear connection mechanism to achieve quick connection and locking between the wheelchair body and the electric vehicle head; A self-aligning mechanism is connected between the inner axle of the electric vehicle head and the front connecting mechanism, and is used to apply an automatic self-aligning force to the inner axle of the head. The release mechanism includes an operating push handle and a steel wire, the steel wire being connected to the operating push handle and being linked to the locking assembly and the return mechanism respectively. Specifically, operating the push handle can synchronously drive the locking assembly to release the locking of the rear connection mechanism via the steel wire, and drive the return mechanism to release the return constraint on the inner axle of the front of the vehicle.

2. The wheelchair-electric vehicle head unit connection device according to claim 1, characterized in that: The rear connection mechanism includes a rear arm body, which is installed to the bottom of the wheelchair body via adjustable connector one and connector two, and a main locking rod and hook are provided at the end of the rear arm body away from the wheelchair body.

3. The wheelchair-electric vehicle head unit connection device according to claim 1, characterized in that: The front connection mechanism also includes a front connector that is adjustablely mounted on the front shell of the electric vehicle head, and the forearm body is connected to the front connector.

4. The wheelchair-electric vehicle head unit connection device according to claim 2, characterized in that: The snap-fit ​​assembly includes a snap-fit ​​box, which has a slot for the main snap-fit ​​rod to enter and a side hanger that cooperates with the hook. The snap-fit ​​box contains a rotatable hook and a metal spring that drives the hook to lock. The hook has a slot for securing the main snap-fit ​​rod.

5. The wheelchair-electric vehicle head unit connection device according to claim 4, characterized in that: The snap-fit ​​assembly is provided with an inner connecting rod connected to the steel wire. By operating the push handle, the hook and latch are driven to rotate through the steel wire and the inner connecting rod to release the hook and latch from the main clamp.

6. The wheelchair-electric vehicle head unit connection device according to claim 5, characterized in that: The return mechanism includes a pneumatic spring and an end box mechanism. One end of the pneumatic spring is connected to the inner axle of the vehicle head, and the other end is releasably connected to the end box mechanism. The end box mechanism is installed on the front connection mechanism.

7. The wheelchair-electric vehicle head unit connection device according to claim 6, characterized in that: The pneumatic spring is used to accumulate a return force when the inner axle of the vehicle head turns, and to drive the inner axle of the vehicle head to automatically return to the straight driving position after the turning operation is completed.

8. The wheelchair-electric vehicle head unit connection device according to claim 6, characterized in that: The end box mechanism includes an end box body and a vertical locking member and a horizontal locking member disposed therein. The vertical locking member is connected to one end of the pneumatic spring member and engages with the horizontal locking member through a slot to achieve locking.

9. A wheelchair-electric vehicle head unit connection device according to claim 8, characterized in that: The horizontal locking member is connected to a secondary wire member, which is connected to the steel wire of the release mechanism. When the push handle is operated, the steel wire pulls the horizontal locking member to move through the secondary wire member, thereby releasing its lock on the vertical locking member.

10. A wheelchair-electric vehicle head unit connection device according to claim 3, characterized in that: The connection position between the front connector and the front shell is adjustable, allowing the front connection mechanism to adapt to different specifications of electric vehicle front ends.

11. A wheelchair-electric vehicle head unit connection device according to claim 2, characterized in that: The first connector and the second connector are connected to the wheelchair body by bolts to adjust their mounting position on the rear arm.

12. The wheelchair-electric vehicle head unit connection device according to claim 4, characterized in that: The snap-fit ​​assembly also includes an inner connecting rod two, which is connected between the inner connecting rod one and the hook fastener.

Images