Connecting device and wheelchair

Abstract

The present application discloses a connecting device, comprising a cross bar and a mounting plate arranged at both ends of the cross bar, wherein the mounting plate is provided with a toggle clamping assembly for connecting to a wheelchair body, wherein the toggle clamping assembly comprises an adjusting shaft rotatably arranged on the mounting plate, a first clamping block coaxially rotatably connected to the adjusting shaft, an eccentric rod eccentrically fixed to the end of the adjusting shaft, and a second clamping block coaxially rotatably connected to the eccentric rod, wherein the mounting plate is located between the first clamping block and the second clamping block, a connecting shaft is slidingly arranged on the mounting plate, and a sliding direction of the connecting shaft is perpendicular to the axial direction of the adjusting shaft, a pull rod is provided between the second clamping block and the connecting shaft, one end of the pull rod is hinged to the second clamping block, and the other end is hinged to the connecting shaft, the first clamping block is rotatably provided with a handle near one end of the connecting shaft, and the handle is rotatably connected to the connecting shaft near one end of the connecting shaft. Through the above scheme, clamping is convenient and no special tools are required during the clamping process.

Description

Technical Field

[0001] The present application relates to the field of wheelchairs, and in particular to a connecting device and a wheelchair. Background Art

[0002] Patent document CN209662011U discloses a wheelchair head connector, which is a clamping structure for connecting the wheelchair head. It consists of a head connecting part and a connector body. A cylindrical cavity is provided on the side of the connector body, and a rotating wheel is placed in the cavity. The rotating wheel is a cylinder with a gear on the side wall. Fixed ear plates are provided on both end faces of the cylinder. The fixed ear plates are fixed to the connecting rod. The other end of the connecting rod is fixed to the wheelchair. A locking rod is also provided in a cavity perpendicular to the length direction of the rotating wheel in the connector body. The locking rod is provided with a tooth structure that cooperates with the rotating wheel. A threaded hole is provided on the end face of the connector body, and the direction of the threaded hole is perpendicular to the side wall of the locking rod. The clamping structure is connected to the head of the vehicle and the wheelchair respectively. The angle between the head of the vehicle and the wheelchair can be easily adjusted through the rotating wheel structure of the connector. The connector can be controlled by the finger on the head handle through the wire control switch.

[0003] During installation, this clamping structure consists of two clamping plates at the front of the vehicle. One clamping plate is fixed to the connector body. Bolts secure one end of the connector body to the vehicle head. The shape of the clamping plates matches the vertical connecting rod of the vehicle head. Fasteners secure the wheelchair connector to the vehicle head. Connecting the clamping structure to the wheelchair is complex and requires specialized tools for assembly and disassembly, making it extremely inconvenient. Summary of the Invention

[0004] In order to quickly connect the front of a wheelchair to the body of the wheelchair, the present application discloses a connecting device and a wheelchair.

[0005] In a first aspect, the present application provides a connection device, which adopts the following technical solution:

[0006] The wheelchair is connected to the control wheel shaft by the second adjusting device and the control wheel is connected to the control wheel shaft by the second adjusting device.

[0007] By adopting the above technical solution, when it is necessary to connect two objects, the cross bar is installed on the side wall of the first object, and the handle is turned to form an opening between the first clamp and the second clamp. The line connecting the rotation point between the handle and the first clamp to the connecting axis is called a virtual line. At this time, the opening formed between the virtual line and the pull rod is facing away from the direction of clamping the second object. The second object is then placed between the first clamp and the second clamp, and the handle is then turned in the opposite direction. When the virtual line and the pull rod are on the same straight line, this is called a pre-clamping state. The handle is continued to be turned so that the virtual line and the pull rod form an angle, and the opening of the angle is facing the direction of clamping the second object. At this time, when there is no external force to pull the handle, the first clamp and the second clamp are locked, and rotation is difficult to occur. The entire process only requires turning the handle to achieve clamping, and no special tools are required for operation, making clamping convenient.

[0008] Optionally, a fan-shaped plate is coaxially fixed to the end of the eccentric rod, an arc-shaped adjustment hole is opened on the side wall of the fan-shaped plate, a display rod is fixed on the side wall of the second clamp, the display rod slides in the arc-shaped adjustment hole, the center of the fan-shaped plate and the arc-shaped adjustment hole is set to coincide with the center of the eccentric rod, and the fan-shaped plate is rotated to adjust the tightness of the clamping of the first clamp and the second clamp.

[0009] By adopting the above technical solution, the sector plate is rotated so that the sector plate and the eccentric rod rotate synchronously. The position of the display rod in the arc-shaped adjustment hole can be used to determine the adjusted distance of the second clamping block and the degree of clamping tightness between the second clamping block.

[0010] Optionally, a first spring is provided on the side wall of the mounting plate, and one end of the first spring away from the mounting plate is connected to the side wall of the second clamping block.

[0011] By adopting the above technical solution, when the handle is rotated so that the handle is rotated in a direction away from the mounting plate, the first spring is stretched. When the object is clamped between the first clamping block and the second clamping block, the handle is rotated in the opposite direction. Under the action of the first spring, a quick reset can be achieved, so that the object can be clamped more tightly.

[0012] Optionally, a mounting block is provided between the cross bar and the mounting plate, and a clamping groove is provided on the mounting block, the end of the cross bar is embedded in the clamping groove, and the cross bar is fixed in the clamping groove by bolts; a mounting rod is fixed to the end of the mounting block away from the cross bar, a first block is fixed to the end of the mounting rod, and a second block is fixed to the end of the mounting plate, and teeth are provided on the opposite side walls of the first block and the second block, and are engaged with each other, and the first block and the second block are fixedly connected by bolts.

[0013] By adopting the above technical solution, the installation block and the crossbar can be adjusted to adjust the rotation angle of the installation block. At the same time, the rotation angle between the first block and the second block can also be adjusted, which makes disassembly and assembly convenient.

[0014] Optionally, a fixed seat is provided on one side of the cross bar, and a first clamping block for clamping the cross bar and a second clamping block used in conjunction with the first clamping block are rotatably provided on the fixed seat. Slots are provided on the opposite surfaces of the first clamping block and the second clamping block. The cross bar is clamped in the slot, a hanging rod is provided on the fixed seat, and a locking structure for adjusting the position of the cross bar is provided on the first clamping block.

[0015] By adopting the above technical solution, when the cross bar needs to be pulled toward the direction close to the fixed seat, the cross bar is hung on the hanging rod through the locking structure, thereby pulling the cross bar upward and locking it.

[0016] Optionally, the locking structure includes a handle rotated on the first clamping block, a second spring hung between the handle and the first clamping block, and a hook groove opened on the side wall of the handle. Rotating the handle can embed the hanging rod in the hook groove.

[0017] By adopting the above technical solution, when the horizontal bar needs to be lifted upward, the handle is rotated so that the second spring is in a stretched state. At this time, an opening is formed between the end of the handle with the hook groove and the first clamping block. At this time, the entire first clamping block is rotated so that the hanging rod is in the hook groove. Then, the handle is released and the hanging rod is engaged in the hook groove.

[0018] Optionally, a gear sleeve is coaxially fixed on the side wall of the cross bar, and a plurality of embedding grooves for embedding the teeth of the gear sleeve are provided on the inner wall of the slot.

[0019] By adopting the above technical solution, the stability of the clamping between the cross bar and the gear sleeve is improved, making it difficult for the cross bar to rotate along its own axis.

[0020] Optionally, a first positioning spring pin is installed on the side wall of the handle, and a second positioning spring pin is installed on the side wall of the handle.

[0021] By adopting the above technical solution, it is difficult to rotate the handle too far during rotation. The first positioning spring pin plays a limiting role. When the handle is rotated to fit with the first clamping block, the second spring positioning pin fixes the handle and the first clamping block relative to each other, further ensuring the stability of the clamping between the first clamping block and the second clamping block.

[0022] In a second aspect, the present application provides a wheelchair that adopts the following technical solution:

[0023] A wheelchair comprises a front wheelchair and a seat body, and comprises the connecting device, wherein the connecting device is installed between the front wheelchair and the seat body, the first clamping block and the second clamping block are clamped on the seat body, and the cross bar is installed on the front wheelchair.

[0024] By adopting the above technical solution, the front of the vehicle can be an electric front of the vehicle, and the chair body can be a wheelchair without a power source. When it is necessary to connect the front of the vehicle to the body to convert it into an electric power-assisted wheelchair, the fixing seat is fixed to the outside of the front of the vehicle so that the first clamping block and the second clamping block clamp the chair body, thereby realizing the conversion into an electric power-assisted wheelchair.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. Turn the handle to lock the first clamping block with the second clamping block, making it difficult to rotate. The entire process can be clamped by simply turning the handle. No special tools are required for operation, making clamping convenient.

[0027] 2. By setting the eccentric rod and the fan-shaped plate, the clamping force between the first clamping block and the second clamping block can be adjusted, further ensuring the stability of the clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the connecting device.

[0029] Figure 2 It is a schematic diagram of the fixed seat portion in the connecting device.

[0030] Figure 3 This is an exploded view of the fixed seat in the connection device.

[0031] Figure 4 It is a schematic diagram of the fixed seat portion in the connecting device, mainly used to show the second spring.

[0032] Figure 5 It is a schematic diagram of the overall structure of the toggle clamping assembly.

[0033] Figure 6 is an exploded view of the toggle clamp assembly.

[0034] Figure 7 This is a schematic diagram of the back of the toggle clamp assembly, mainly used to show the fan-shaped plate.

[0035] Figure 8 This is a schematic diagram of the end of the adjusting shaft and the eccentric rod.

[0036] Figure 9 It is a schematic diagram of the overall structure of a wheelchair using a connecting device.

[0037] Figure numerals: 1. cross bar; 2. mounting plate; 3. toggle clamping assembly; 4. adjusting shaft; 5. first clamping block; 6. eccentric rod; 7. second clamping block; 8. connecting shaft; 9. pull rod; 10. handle; 11. fan-shaped plate; 12. arc-shaped adjustment hole; 13. display rod; 14. first spring; 15. mounting block; 16. clamping groove; 17. mounting rod; 18. first block; 19. second block; 20. fixing seat; 21. first clamping block; 22. second clamping block; 23. clamping groove; 24. hanging rod; 25. handle; 26. second spring; 27. hook groove; 28. gear sleeve; 29. ​​embedded groove; 30. first positioning spring pin; 31. second positioning spring pin; 32. car head; 33. chair body. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-9 This application is described in further detail.

[0039] In a first aspect, an embodiment of the present application discloses a connection device.

[0040] Reference Figure 1 A connecting device includes a crossbar 1 with a toggle clamping assembly 3 disposed at each end thereof for clamping an object. In this embodiment, the clamped object is not limited to the body of a wheelchair. A fixing seat 20 is also disposed on one side of the crossbar 1, which allows the crossbar 1 to be mounted on the side wall of an object.

[0041] Reference Figure 1 In this embodiment, the connection between the wheelchair head and the wheelchair body is used as the background. The wheelchair body is a conventional non-powered wheelchair. Non-powered wheelchairs typically include a seat frame, small support wheels disposed on the front side of the seat frame, and large support wheels. When using the connection device of this embodiment, the fixing base 20 needs to be fixedly mounted on the wheelchair head.

[0042] Reference Figure 2 The fixing base 20 is a U-shaped cavity formed of sheet metal. A first clamping block 21 is rotatably mounted within the cavity of the fixing base 20. A second clamping block 22 is mounted on the side of the first clamping block 21 facing away from the fixing base 20. Slots 23 are defined on the opposing surfaces of the first and second clamping blocks 21, 22. The crossbar 1 is inserted into the slots 23, with the axial direction of the crossbar 1 being parallel to the axis of the rotation axis of the first clamping block 21.

[0043] Reference Figure 2 and Figure 3 To prevent the crossbar 1 from rotating along its own axis when installed in the slot 23, a gear sleeve 28 is coaxially disposed on the outside of the crossbar 1. The gear sleeve 28 is integrally formed with the crossbar 1. A plurality of embedded grooves 29 are formed in the slot 23. When the gear sleeve 28 is installed in the slot 23, the teeth of the gear sleeve 28 are embedded in the embedded grooves 29, thereby restricting the crossbar 1 from rotating about its own axis.

[0044] Reference Figure 3 When connecting the electric wheelchair head to the body of the non-powered wheelchair, it is necessary to adjust the position of the crossbar 1 to lift the small support wheel on the front of the chair frame, thereby facilitating the electric wheelchair head to drive the large support wheel. To achieve this effect, a hanging rod 24 is installed on the fixed seat 20. When the first clamping block 21 is rotatably connected to the upper end of the fixed seat 20, the hanging rod 24 is fixed to the lower end of the fixed seat 20 and is arranged parallel to the crossbar 1. The first clamping block 21 is also provided with a locking structure for hanging on the hanging rod 24 and adjusting the position of the crossbar 1.

[0045] Reference Figure 4 The locking structure includes a handle 25, a second spring 26, and a hook groove 27. The handle 25 is rotatably connected to the side wall of the first clamping block 21. The handle 25 is hook-shaped, and the pivot point between the handle 25 and the first clamping block 21 is located between the two ends of the handle 25, at the bend of the handle 25. One end of the second spring 26 is hooked to the bend of the handle 25, and the other end is hooked to the end of the first clamping block 21 near the hanging rod 24. Under the action of the second spring 26, the end of the handle 25 near the second spring 26 tends to be pulled toward the hanging rod 24.

[0046] Reference Figure 4 The hook groove 27 is opened on the side wall of the end of the handle 25 close to the hanging rod 24. During actual use, the handle 25 is rotated in advance so that the second spring 26 is stretched, and then the first block 21 and the handle 25 are rotated as a whole toward the direction close to the inner cavity of the fixing seat 20 until the hanging rod 24 is embedded in the hook groove 27. Under the action of the second spring 26, the handle 25 is tightly hooked on the hanging rod 24.

[0047] Reference Figure 2 In the process of rotating the handle 25, in order to prevent the handle 25 from rotating too far, a first positioning spring pin 30 is installed on the side wall of the handle 25. When the handle 25 is rotated, the contact of the first positioning spring pin 30 abuts against the side edge of the second block 22, making it difficult for the handle 25 to continue rotating.

[0048] Reference Figure 1 In order to achieve a wider range of adjustment for the toggle clamping assembly 3, a mounting block 15 is provided between the cross bar 1 and the toggle clamping assembly 3. A clamping groove 16 is penetrated through the side wall of the mounting block 15. The end of the cross bar 1 is embedded in the clamping groove 16. A bolt is passed through the clamping groove 16 and the cross bar 1 in the clamping groove 16, so that the cross bar 1 is locked in the clamping groove 16.

[0049] Reference Figure 1 and Figure 5Mounting block 15 is bent 90 degrees to form two ends. A mounting rod 17 is fixed to the end of mounting block 15 away from crossbar 1, perpendicular to crossbar 1. A circular first block 18 is fixed to the end of mounting rod 17 away from mounting block 15. Mounting plate 2 is located on one side of first block 18, and a circular second block 19 is fixed to the side wall of mounting plate 2. First block 18 and second block 19 are locked together by bolts.

[0050] Reference Figure 1 and Figure 5 In order to ensure the stability of the installation between the first block 18 and the second block 19 and to prevent the second block 19 from rotating relative to the first block 18, teeth are formed on the opposite side walls of the first block 18 and the second block 19, and the teeth on the first block 18 are embedded between the two teeth on the second block 19.

[0051] Reference Figure 5 and Figure 6 The toggle clamping assembly 3 is mounted on the mounting plate 2. The toggle clamping assembly 3 includes an adjustment shaft 4 and a first clamping block 5. The adjustment shaft 4 is rotatably connected to the mounting plate 2. During the actual installation process, the adjustment shaft 4 is installed between the two ends of the first clamping block 5. The first clamping block 5 is rotatably connected to the mounting plate 2 via the adjustment shaft 4.

[0052] Reference Figure 5 and Figure 6 The toggle clamping assembly 3 also includes a second clamping block 7 and an eccentric rod 6. The eccentric rod 6 is coaxially fixed to the end of the adjustment shaft 4. The eccentric rod 6 is a round rod. The second clamping block 7 is coaxially connected to the eccentric rod 6. In order to drive the first clamping block 5 and the second clamping block 7 to open and close the clamped object, a handle 10 is rotatably connected to the end of the first clamping block 5 near the mounting block 15, and a waist-shaped hole is penetrated through the side wall of the mounting plate 2. The waist-shaped hole is opened near the position where the handle 10 is rotatably connected to the first clamping block 21. A connecting shaft 8 is slidably arranged in the waist-shaped hole. The sliding direction of the connecting shaft 8 is perpendicular to the rotation direction of the handle 10. The handle 10 is rotatably connected to the connecting shaft 8. Therefore, when the handle 10 is rotated, the connecting shaft 8 can be driven to slide up and down in the waist-shaped hole.

[0053] Reference Figure 6 In order to realize the opening and closing between the first clamping block 5 and the second clamping block 7 when the handle 10 is turned, a pull rod 9 is hingedly provided on the connecting shaft 8, and the end of the pull rod 9 away from the connecting shaft 8 is hingedly connected to the second clamping block 7. The line connecting the two rotation points on the handle 10 is set as a virtual line. In the process of clamping the object, the handle 10 is pulled in the direction away from the eccentric rod 6, so that an angle is formed between the virtual line and the pull rod 9 with the opening facing away from the eccentric rod 6. The handle 10 is continued to be pulled, and the connecting shaft 8 slides in the waist-shaped hole toward the eccentric rod 6.

[0054] Reference Figure 6 At this point, place the object to be clamped at the end of the first clamping block 5 away from the connecting shaft 8. Rotate the handle 10 in the opposite direction, causing the connecting shaft 8 to move away from the eccentric rod 6 until the virtual line and the pull rod 9 form an angle with the opening facing the eccentric rod 6. At this point, the first clamping block 5 and the second clamping block 7 have clamped the object.

[0055] Reference Figure 6 In order to further ensure the stability of clamping, a second positioning spring pin 31 is provided on the side wall of the handle 10, so that the contact of the second positioning spring pin 31 abuts against the side wall of the first clamping block 5. In the absence of external force, the handle 10 remains in place, ensuring the stability of clamping between the first clamping block 5 and the second clamping block 7.

[0056] Reference Figure 6 A first spring 14 is also provided on the side wall of the mounting plate 2. One end of the first spring 14 away from the mounting plate 2 is fixedly connected to the side wall of the second clamping block 7. The first spring 14 tends to pull the second clamping block 7 toward the mounting plate 2, thereby further ensuring the stability of the clamping between the first clamping block 5 and the second clamping block 7.

[0057] Reference Figure 7 and Figure 8 To adjust the holding force between the first and second clamps 5 and 7, a sector plate 11 is coaxially fixed to the end of the eccentric rod 6. An arc-shaped adjustment hole 12 is formed through the sidewall of sector plate 11. The center of the sector plate 11 and the arc-shaped adjustment hole 12 coincides with the center of the eccentric rod 6. A display rod 13 is fixed to the sidewall of the second clamp 7. The display rod 13 is inserted into and slides within the arc-shaped adjustment hole 12. To increase the holding force between the first and second clamps 5 and 7, sector plate 11 is rotated, causing the eccentric rod 6 to rotate. Since the first clamp 5 is coaxial with the adjustment shaft 4, the first clamp 5 does not change relative to its original position during rotation. Since the second clamp 7 is coaxially connected to the eccentric rod 6, the eccentricity causes the second clamp 7 to move closer to the first clamp 5 compared to its original position. The adjustable range of the second clamp 7 is between 0 and 3 mm.

[0058] In a second aspect, an embodiment of the present application discloses a wheelchair.

[0059] Reference Figure 9 A wheelchair includes a front end 32 and a seat body 33. The front end 32 is an electric front end 32, and the seat body 33 is a non-powered wheelchair. It also includes the connecting device disclosed in the above embodiment. During actual use, the fixing seat 20 is fixed to the side wall of the front end 32, so that the first clamping block 5 and the second clamping block 7 clamp the seat body 33, thereby realizing the connection between the front end 32 and the seat body 33.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A connecting device, characterized in that: The invention comprises a crossbar (1), a mounting plate (2) arranged at both ends of the crossbar (1), a toggle clamping assembly (3) for connecting to a wheelchair body is arranged on the mounting plate (2), the toggle clamping assembly (3) comprises an adjustment shaft (4) rotatably arranged on the mounting plate (2), a first clamping block (5) coaxially connected to the adjustment shaft (4), an eccentric rod (6) eccentrically fixed to the end of the adjustment shaft (4), and a second clamping block (7) coaxially connected to the eccentric rod (6), the mounting plate (2) is located between the first clamping block (5) and the second clamping block (7). Between the two clamping blocks (7), a connecting shaft (8) is slidingly provided on the mounting plate (2), and the sliding direction of the connecting shaft (8) is perpendicular to the axial direction of the adjusting shaft (4). A pull rod (9) is provided between the second clamping block (7) and the connecting shaft (8), one end of the pull rod (9) is hinged to the second clamping block (7), and the other end is hinged to the connecting shaft (8). A handle (10) is rotatably provided near one end of the connecting shaft (8) of the first clamping block (5), and the handle (10) is rotatably connected to the connecting shaft (8) at one end near the connecting shaft (8); A fixing seat (20) is provided on one side of the cross bar (1); a first clamping block (21) for clamping the cross bar (1) and a second clamping block (22) used in conjunction with the first clamping block (21) are rotatably provided on the fixing seat (20); a clamping groove (23) is provided on the opposite surfaces of the first clamping block (21) and the second clamping block (22); the cross bar (1) is clamped in the clamping groove (23); a hanging rod (24) is provided on the fixing seat (20); and a locking structure for adjusting the position of the cross bar (1) is provided on the first clamping block (5); The locking structure comprises a handle (25) that rotates on the first clamping block (21), a second spring (26) that is connected between the handle (25) and the first clamping block (21), and a hook groove (27) provided on the side wall of the handle (25); the handle (25) is rotated so that the hanging rod (24) is embedded in the hook groove (27); A fan-shaped plate (11) is coaxially fixed to the end of the eccentric rod (6), and an arc-shaped adjustment hole (12) is opened on the side wall of the fan-shaped plate (11). A display rod (13) is fixed on the side wall of the second clamping block (7), and the display rod (13) slides in the arc-shaped adjustment hole (12). The center of the fan-shaped plate (11) and the arc-shaped adjustment hole (12) are arranged to coincide with the center of the eccentric rod (6). The fan-shaped plate (11) is rotated to adjust the tightness of the clamping between the first clamping block (5) and the second clamping block (7).

2. A connecting device according to claim 1, characterized in that: A first spring (14) is provided on the side wall of the mounting plate (2), and one end of the first spring (14) away from the mounting plate (2) is connected to the side wall of the second clamping block (7).

3. A connecting device according to claim 1, characterized in that: A mounting block (15) is provided between the cross bar (1) and the mounting plate (2), and a clamping groove (16) is provided on the mounting block (15). The end of the cross bar (1) is embedded in the clamping groove (16), and the cross bar (1) is fixed in the clamping groove (16) by bolts; a mounting rod (17) is fixed to the end of the mounting block (15) away from the cross bar (1), a first block (18) is fixed to the end of the mounting rod (17), and a second block (19) is fixed to the end of the mounting plate (2), and teeth are provided on the side walls opposite to the first block (18) and the second block (19), and the first block (18) and the second block (19) are meshed with each other, and the first block (18) and the second block (19) are fixedly connected by bolts.

4. A connecting device according to claim 1, characterized in that: A gear sleeve (28) is coaxially fixed on the side wall of the crossbar (1), and a plurality of embedding grooves (29) for embedding the teeth of the gear sleeve (28) are provided on the inner wall of the clamping groove (23).

5. A connecting device according to claim 1, characterized in that: A first positioning spring pin (30) is installed on the side wall of the handle (25), and a second positioning spring pin (31) is installed on the side wall of the handle (10).

6. A wheelchair comprising a front portion (32) and a body (33), characterized in that: It also includes a connecting device as described in any one of claims 1 to 5, wherein the connecting device is installed between the vehicle head (32) and the chair body (33), the first clamping block (5) and the second clamping block (7) are clamped on the chair body (33), and the cross bar (1) is installed on the vehicle head (32).

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