Connecting mechanism for wheelchair electric car head

Abstract

The utility model belongs to the technical field of connecting mechanism, specifically relates to a connecting mechanism for wheelchair electric car head, and the new type includes: chuck holder and two symmetrical chuck head of rotationally connected chuck holder, the opposite sides of two chuck head are equipped with clamping part, two elastic shims are arranged in the clamping part of corresponding chuck head respectively, swing locking assembly is connected with two chuck head, wherein swing locking assembly is suitable for making two chuck head rotate around chuck holder when swinging, so that the elastic shims in the clamping part are close to or away from each other, the connecting mechanism for wheelchair electric car head is provided with elastic shims in the clamping part, avoids the direct contact between metal and metal, significantly reduces the wear and tear and noise problem in long -term use, and the buffering effect of elastic shims also protects the wheelchair frame surface, avoids the scratch, prolongs the service life of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of connection mechanism technology, specifically relating to a connection mechanism for the head of a wheelchair electric vehicle. Background Technology

[0002] A wheelchair motor is a power unit that can be attached to a wheelchair to propel it forward; the connection mechanism between the motor and the wheelchair is particularly critical, requiring both quick assembly and disassembly as well as secure clamping.

[0003] Existing patent CN209925362U discloses a "quick-gripping mechanism" that uses a handle to drive a horizontal pull rod, linking the left and right clamps to clamp and release a wheelchair. Specifically, this mechanism consists of components such as a sleeve, a swing shaft, a guide sleeve, and a connecting plate. It utilizes the lever principle to convert the swinging motion of the handle into the opening and closing action of the clamps, offering advantages such as quick and effortless operation. However, in practical applications, this type of mechanism still has the following significant problems: First, traditional clamps (left clamp 3, right clamp 4) typically have metal in direct contact with the frame. Over time, this can lead to surface wear due to friction, reducing clamping force and potentially affecting the precision of the mechanism due to metal debris. Furthermore, this rigid contact can generate noise during clamping and scratch the frame surface, affecting aesthetics and lifespan.

[0004] Secondly, when the horizontal lever 9 is driven to unlock the clamps (left clamp 3, right clamp 4), the clamps (left clamp 3, right clamp 4) will not swing outward automatically. The user still needs to apply external force to pry open the clamps (left clamp 3, right clamp 4) so ​​that the electric wheelchair head is detached from the frame 20, which is inconvenient for the user.

[0005] Therefore, in order to solve the above problems, it is necessary to design a connecting mechanism for the electric wheelchair head unit. Utility Model Content

[0006] The purpose of this invention is to provide a connecting mechanism for the head of an electric wheelchair to solve the technical problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model provides a connecting mechanism for the head unit of a wheelchair electric vehicle, comprising: A chuck holder and two symmetrically arranged chucks rotatably connected to the chuck holder; wherein Both of the aforementioned clamps have clamping portions on opposite sides; Two elastic pads are respectively set in the clamping part of the corresponding chuck; A swing locking assembly is connected to two clamps; among which... The swing locking assembly is adapted to rotate the two clamps around the clamp seat during swinging, so that the elastic pads in the clamping part move closer or further apart.

[0008] Furthermore, the inner side of the clamping part is provided with at least two dovetail recesses; The outer side of the elastic gasket has at least two dovetail protrusions; wherein The dovetail protrusion and the dovetail concave are adapted to each other and are slidably connected.

[0009] Furthermore, the clamping part is provided with at least one threaded hole; The elastic gasket is provided with at least one first through portion; wherein The clamping part is bolted to the elastic washer; and The bolt is adapted to pass through the first through portion and then be screwed into the threaded hole to secure the elastic washer.

[0010] Furthermore, the swing locking assembly includes: a connecting rod passing through the two clamps, a nut sleeved on the connecting rod, and a handle seat rotatably connected to one end of the connecting rod; wherein The other end of the connecting rod is provided with a threaded portion on the outer side; The nut is threadedly connected to the threaded portion and is located on the outside of any chuck; The handle base is provided with a clearance portion; wherein The clearance portion is adapted to avoid the connecting rod; and The handle seat is adapted to move downwards during swinging, one end of the connecting rod is located in the clearance part, and the nut and handle seat respectively press the two clamps to bring the two clamps closer together.

[0011] Furthermore, the swing locking assembly further includes: a positioning seat located between any of the clamps and the handle seat, and connecting pieces disposed on both sides of the positioning seat; wherein The positioning seat has a long through hole in the middle; The connecting rod is located inside the through hole; and One end of each of the two connecting pieces is rotatably connected to both sides of the positioning seat; The other ends of the two connecting pieces are rotatably connected to both sides of the handle seat.

[0012] Furthermore, a countersunk through hole is provided on the outer surface of the chuck; wherein The connecting rod is located inside the countersunk through hole of the two clamps; The nut is located within any countersunk through hole; and The positioning seat is located inside another countersunk through hole.

[0013] Furthermore, the side of the chuck is provided with mounting holes; wherein The mounting hole communicates with the countersunk through hole; and A pin is provided inside the mounting hole; The pin is adapted to rotate within the mounting hole; The pin has a second through portion in its middle; wherein The connecting rod is located within the second through portion of the two pins; and The threaded portion is located at any of the second through portions; The link is adapted to slide in another second passage.

[0014] Furthermore, the pin shaft has a flat portion on its arc surface; The nut contacts the flat portion of any pin. The positioning seat is connected to the flat portion of another pin.

[0015] Furthermore, a spring is sleeved on the outer side of the connecting rod; The two ends of the spring abut against the two pins.

[0016] Furthermore, a screw is provided at the bottom of the chuck seat; wherein The screw is adapted for threaded connection with the electric vehicle head unit.

[0017] The beneficial effects of this utility model are: (i) By operating the swing locking assembly, the user drives the chuck to rotate around the chuck seat. Under the action of the swing locking assembly, the clamping part of the chuck moves inward, and the elastic pad contacts the wheelchair frame and generates clamping force. The user then operates the swing locking assembly in the opposite direction, driving the chuck to rotate outward around the chuck seat. Under the action of the swing locking assembly, the clamping part of the chuck moves outward, and the elastic pad disengages from the wheelchair frame, thus releasing the chuck. By setting the elastic pad inside the clamping part, direct metal-to-metal contact is avoided, significantly reducing wear and noise problems during long-term use. At the same time, the cushioning effect of the elastic pad also protects the surface of the wheelchair frame, preventing scratches and extending the service life of the equipment.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 The three-dimensional representation of the preferred embodiment of this utility model. Figure 1 ; Figure 2 This is an exploded view of a preferred embodiment of the clamp and elastic washer of this utility model; Figure 3 This is an exploded view of a preferred embodiment of the swing locking assembly of this utility model; Figure 4 This is a perspective view of a preferred embodiment of the swing locking assembly of this utility model; Figure 5 This is a perspective view of a preferred embodiment of the positioning seat of this utility model; Figure 6 This is a perspective view of a preferred embodiment of the pin of this utility model; Figure 7 This is an exploded view of a preferred embodiment of the present invention. Figure 8 The three-dimensional representation of the preferred embodiment of this utility model. Figure 2 .

[0022] In the picture: Chuck 1; 2. Chuck 2, clamping part 21, dovetail recess 211, threaded hole 212, countersunk through hole 22, mounting hole 23; Elastic gasket 3, dovetail protrusion 31, first through part 32; Swing locking assembly 4, connecting rod 41, threaded part 411, nut 42, handle seat 43, clearance part 431, positioning seat 44, long through hole 441, connecting piece 45; Pin 5, second through part 51, flat part 52; Spring 6, screw 7. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Example 1

[0024] like Figures 1 to 8 As shown, this embodiment provides a connecting mechanism for a wheelchair electric motor head unit, including: The chuck base 1 and two symmetrically arranged chucks 2 rotatably connected to the chuck base 1; wherein each of the two chucks 2 has a clamping part 21 on its opposite side; two elastic pads 3 are respectively disposed in the clamping part 21 of the corresponding chuck 2; a swing locking assembly 4 is connected to the two chucks 2; wherein the swing locking assembly 4 is adapted to make the two chucks 2 rotate around the chuck base 1 when swinging, so that the elastic pads 3 in the clamping part 21 move closer or further away from each other; wherein the clamping part 21 is V-shaped or arc-shaped to accommodate wheelchair frames of different diameters; wherein the elastic pads 3 are made of, but not limited to, rubber or silicone materials.

[0025] In this embodiment, the user operates the swing locking assembly 4 to drive the chuck 2 to rotate around the chuck seat 1. Under the action of the swing locking assembly 4, the clamping part 21 of the chuck 2 moves inward, and the elastic pad 3 contacts the wheelchair frame and generates a clamping force. The user then operates the swing locking assembly 4 in the opposite direction to drive the chuck 2 to rotate outward around the chuck seat 1. Under the action of the swing locking assembly 4, the clamping part 21 of the chuck 2 separates outward, and the elastic pad 3 disengages from the wheelchair frame, thus achieving release. By setting the elastic pad 3 inside the clamping part 21, direct metal-to-metal contact is avoided, significantly reducing wear and noise problems during long-term use. At the same time, the cushioning effect of the elastic pad 3 also protects the surface of the wheelchair frame, preventing scratches and extending the service life of the equipment.

[0026] The clamping part 21 has at least two dovetail recesses 211 on its inner side; the elastic pad 3 has at least two dovetail protrusions 31 on its outer side; wherein the dovetail protrusions 31 are adapted to the dovetail recesses 211 and are slidably connected; wherein the slidable connection between the dovetail recesses 211 and the dovetail protrusions 31 makes the installation and removal of the elastic pad 3 more convenient, and the user can complete the installation without the use of tools; wherein the shape design of the dovetail structure allows the elastic pad 3 to be firmly fixed in the clamping part 21 after installation, avoiding the elastic pad 3 from falling off or shifting during use.

[0027] The clamping part 21 is provided with at least one threaded hole 212; the elastic gasket 3 is provided with at least one first through part 32; wherein the clamping part 21 is bolted to the elastic gasket 3; and the bolt is adapted to pass through the first through part 32 and then screw into the threaded hole 212 to fix the elastic gasket 3; wherein the position of the threaded hole 212 corresponds to the first through part 32 on the elastic gasket 3 to ensure that the bolt can pass through and screw in smoothly; at the same time, the number of threaded holes 212 is the same as the number of first through parts 32; wherein the elastic gasket 3 is fixed to the clamping part 21 by bolts to ensure that the elastic gasket 3 will not fall off or shift during the clamping process, and further ensures the firmness of the connection of the elastic gasket 3 on the basis of the dovetail structure.

[0028] The swing locking assembly 4 includes: a connecting rod 41 passing through the two clamps 2, a nut 42 sleeved on the connecting rod 41, and a handle seat 43 rotatably connected to one end of the connecting rod 41; wherein the other end of the connecting rod 41 is provided with a threaded portion 411; the nut 42 is threadedly connected to the threaded portion 411 and is located outside either clamp 2; the handle seat 43 is provided with a clearance portion 431; wherein the clearance portion 431 is adapted to clearance the connecting rod 41; and the handle seat 43 is adapted to move downward during swinging, with one end of the connecting rod 41 located inside the clearance portion 431, and the nut 42 and the handle seat 43 respectively pressing the two clamps 2 to bring the two clamps 2 closer together; wherein the clamps 2 are pressed and locked by the threaded connection between the nut 42 and the threaded portion 411; at the same time, the length of the connecting rod 41 can be adjusted by tightening or loosening it to adjust the opening angle of the two clamps 2.

[0029] In this embodiment, when the user swings the handle seat 43 downwards, the clearance portion 431 of the handle seat 43 clears the connecting rod 41, so that one end of the connecting rod 41 is located inside the clearance portion 431. The swinging of the handle seat 43 causes the side of the handle seat 43 and the nut 42 to jointly press the chuck 2, and the two chucks 2 approach each other. The elastic pad 3 in the clamping portion 21 contacts the wheelchair frame and generates a clamping force. When the user swings the handle seat 43 upwards, the connecting rod 41 moves out of the clearance portion 431 of the handle seat 43. The handle seat 43 reduces the squeezing force on the chuck 2, and the two chucks 2 can move away from each other. The elastic pad 3 in the clamping portion 21 disengages from the wheelchair frame, achieving release, thereby realizing the opening and closing of the chuck 2. The operation is simple and labor-saving, and suitable for users to quickly disassemble and assemble.

[0030] The swing locking assembly 4 further includes: a positioning seat 44 located between any of the clamps 2 and the handle seat 43, and connecting pieces 45 disposed on both sides of the positioning seat 44; wherein the positioning seat 44 has a long through hole 441 in the middle; the connecting rod 41 is located in the long through hole 441; and one end of the two connecting pieces 45 is rotatably connected to both sides of the positioning seat 44; the other end of the two connecting pieces 45 is rotatably connected to both sides of the handle seat 43; by setting the positioning seat 44, the contact area between the handle seat 43 and the clamp 2 is increased. When the handle seat 43 swings, it presses against the positioning seat 44, which in turn presses against the chuck. By setting the connecting piece 45, the handle seat 43 and the positioning seat 44 are connected, which enhances the overall stability of the swing locking assembly 4. By setting the positioning seat 44 and the connecting piece 45, the length of the connecting rod 41 is compressed when the handle seat 43 swings, which further controls the opening and closing angle of the two chucks 2. By setting the elongated through hole 441, the connecting rod 41 is avoided, preventing it from affecting the movement of the connecting rod 41.

[0031] The outer surface of the chuck 2 is provided with a countersunk through hole 22; wherein the connecting rod 41 is located in the countersunk through holes 22 of the two chucks 2; the nut 42 is located in any one of the countersunk through holes 22; and the positioning seat 44 is located in the other countersunk through hole 22; wherein by setting the countersunk through hole 22, the nut 42 and the positioning seat 44 are accommodated, so as to avoid excessive protrusion affecting the appearance or use; wherein the countersunk portion of the countersunk through hole 22 accommodating the positioning seat 44 is elliptical to avoid and accommodate the connecting piece 45.

[0032] The chuck 2 has a mounting hole 23 on its side; wherein the mounting hole 23 communicates with the countersunk through hole 22; and a pin 5 is provided in the mounting hole 23; the pin 5 is adapted to rotate in the mounting hole 23; a second through part 51 is provided in the middle of the pin 5; wherein the connecting rod 41 is located in the second through part 51 of the two pins 5; and the threaded part 411 is located in either of the second through parts 51; the connecting rod 41 is adapted to slide in the other second through part 51; wherein since the two chucks 2 are rotating, the connecting rod 41 will generate a certain bending stress when it moves, and the pin 5 is adapted to rotate in the mounting hole 23, thereby adapting to the rotation of the connecting rod 41 and preventing the connecting rod 41 from bending.

[0033] The pin 5 has a flat portion 52 on its arc surface; the nut 42 contacts the flat portion 52 of any pin 5; the positioning seat 44 is connected to the flat portion 52 of another pin 5; by providing the flat portion 52, the contact area is increased, stress concentration is avoided, and the connection is also made more stable.

[0034] A spring 6 is sleeved on the outer side of the connecting rod 41; the two ends of the spring 6 abut against the two pins 5; by setting the spring 6, when the two clamps 2 are close together, the two pins 5 compress the spring 6, and when the two clamps 2 are unlocked, the spring 6 deforms and rebounds, automatically opening the two pins 5 so that the two clamps 2 automatically move away.

[0035] The bottom of the chuck seat 1 is provided with a screw 7; wherein the screw 7 is adapted to be threadedly connected to the electric vehicle head; wherein the screw 7 is threadedly connected to the electric vehicle head, thereby facilitating quick installation and disassembly.

[0036] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0037] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A connecting mechanism for the head unit of an electric wheelchair, characterized in that, include: Chuck seat (1) and two symmetrically arranged chucks (2) rotatably connected to chuck seat (1); in Both of the clamps (2) are provided with clamping parts (21) on opposite sides; Two elastic pads (3) are respectively set in the clamping part (21) of the corresponding chuck (2); The swing locking assembly (4) is connected to the two clamps (2); wherein The swing locking assembly (4) is adapted to rotate the two clamps (2) around the clamp seat (1) during swinging, so that the elastic pads (3) in the clamping part (21) move closer or further apart from each other.

2. The connecting mechanism for the electric wheelchair head unit as described in claim 1, characterized in that, The clamping part (21) has at least two dovetail recesses (211) on its inner side. The elastic pad (3) has at least two dovetail protrusions (31) on its outer side; wherein The dovetail protrusion (31) is adapted to the dovetail recess (211) and is slidably connected.

3. The connecting mechanism for the electric wheelchair head unit as described in claim 2, characterized in that, The clamping part (21) is provided with at least one threaded hole (212); The elastic gasket (3) is provided with at least one first through portion (32); wherein The clamping part (21) is bolted to the elastic washer (3); and The bolt is adapted to pass through the first through part (32) and then be screwed into the threaded hole (212) to fix the elastic gasket (3).

4. The connecting mechanism for the electric wheelchair drive unit as described in claim 3, characterized in that, The swing locking assembly (4) includes: a connecting rod (41) passing through the two clamps (2), a nut (42) sleeved on the connecting rod (41), and a handle seat (43) rotatably connected to one end of the connecting rod (41); wherein The other end of the connecting rod (41) is provided with a threaded part (411). The nut (42) is threaded to the threaded portion (411) and is located outside any of the chucks (2); The handle base (43) is provided with a clearance part (431); wherein The avoidance part (431) is adapted to avoid the connecting rod (41); and The handle seat (43) is adapted to move downward during swinging, one end of the connecting rod (41) is located in the clearance part (431), and the nut (42) and the handle seat (43) respectively press the two clamps (2) so that the two clamps (2) are close together.

5. The connecting mechanism for the electric wheelchair drive unit as described in claim 4, characterized in that, The swing locking assembly (4) further includes: a positioning seat (44) located between any of the clamps (2) and the handle seat (43) and connecting pieces (45) disposed on both sides of the positioning seat (44); wherein The positioning seat (44) has a long through hole (441) in the middle. The connecting rod (41) is located within the through hole (441); and One end of each of the two connecting pieces (45) is rotatably connected to both sides of the positioning seat (44); The other ends of the two connecting pieces (45) are rotatably connected to both sides of the handle seat (43).

6. The connecting mechanism for the electric wheelchair head unit as described in claim 5, characterized in that, The outer surface of the chuck (2) is provided with a countersunk through hole (22); wherein The connecting rod (41) is located in the countersunk through hole (22) of the two clamps (2); The nut (42) is located within any countersunk hole (22); and The positioning seat (44) is located inside another countersunk through hole (22).

7. The connecting mechanism for the electric wheelchair drive unit as described in claim 6, characterized in that, The chuck (2) has mounting holes (23) on its side; wherein The mounting hole (23) communicates with the countersunk through hole (22); and A pin (5) is provided inside the mounting hole (23); The pin (5) is adapted to rotate within the mounting hole (23); The pin (5) has a second through part (51) in the middle; wherein The connecting rod (41) is located within the second through portion (51) of the two pins (5); and The threaded portion (411) is located at any of the second through portions (51). The link (41) is adapted to slide in another second passage (51).

8. The connecting mechanism for the electric wheelchair head unit as described in claim 7, characterized in that, The pin (5) has a flat part (52) on its arc surface; The nut (42) contacts the flat portion (52) of any pin (5); The positioning seat (44) is connected to the flat part (52) of another pin (5).

9. The connecting mechanism for the electric wheelchair head unit as described in claim 8, characterized in that, A spring (6) is sleeved on the outside of the connecting rod (41). The two ends of the spring (6) abut against the two pins (5).

10. The connecting mechanism for the electric wheelchair head unit as described in claim 9, characterized in that, The bottom of the chuck (1) is provided with a screw (7); wherein The screw (7) is adapted to be threadedly connected to the electric vehicle head.

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