A power-assisted device and a wheelchair

Abstract

The utility model discloses a kind of power-assisted auxiliary devices, comprising: power-assisted mechanism, first connection function unit, second connection function unit and connecting mechanism, first connection function unit is connected with power-assisted mechanism;Second connection function unit is connected with wheelchair;First connection function unit and second connection function unit are connected by connecting mechanism and realize quick disassembly and assembly.First connection function unit includes pedestal and lateral installation part, pedestal is connected with power-assisted mechanism, lateral installation part is located on pedestal, and at least one first mounting hole is equipped on the lateral installation part.The utility model can realize automatic movement by installing power-assisted mechanism on wheelchair, solve the problem of many inconvenience problems brought to user in the case of no other person help;Second connection function unit is connected with wheelchair, and the quick disassembly and assembly of first connection function unit and second connection function unit are realized by connecting mechanism, simplify the disassembly and assembly step of power-assisted mechanism and wheelchair, improve the disassembly and assembly efficiency of power-assisted mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair technology, and specifically relates to an assistive device and a wheelchair. Background Technology

[0002] Wheelchairs are a means of transportation for people with mobility impairments. When a user wants to move without being pushed, they usually need to manually rotate the wheels of the wheelchair to make it move. Wheelchairs cannot move automatically, and the hands come into contact with the wheels during this process, which can cause hand chafing and other inconveniences for the user. Although there are some power assist devices for wheelchairs on the market, their installation and disassembly are quite cumbersome, which seriously affects their efficiency. Therefore, there is an urgent need for a power assist device that can be quickly installed and disassembled to meet the installation needs of wheelchairs. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide an assistive device and wheelchair with a reasonable structure. It is connected to the wheelchair through the second connecting functional unit, and at the same time, the connecting mechanism enables the quick assembly and disassembly of the first connecting functional unit and the second connecting functional unit, simplifying the assembly and disassembly steps of the assistive mechanism and the wheelchair, and effectively improving the assembly and disassembly efficiency of the assistive mechanism.

[0004] Technical solution: To achieve the above objectives, this utility model provides a power-assisting device, comprising: A power assist mechanism for assisting wheelchair operation and a first connecting functional unit, wherein the first connecting functional unit is connected to the power assist mechanism; A second connection function unit is connected to the wheelchair; It also includes a connecting mechanism for quick assembly and disassembly. The first and second connecting functional units are connected via this mechanism to achieve quick assembly and disassembly. The first connecting functional unit includes a base and a lateral mounting portion. The base is connected to the assistive mechanism, and the lateral mounting portion is disposed on the base, with at least one first mounting hole. The assistive device described in this utility model enables automatic movement of the wheelchair by installing an assistive mechanism on it, effectively solving many inconveniences for users without assistance. The second connecting functional unit is connected to the wheelchair, and the connecting mechanism facilitates quick assembly and disassembly of both the first and second connecting functional units, simplifying the assembly and disassembly steps of the assistive mechanism and the wheelchair, effectively improving the efficiency of the assistive mechanism's assembly and disassembly, and better meeting the user's needs.

[0005] The first connecting functional unit includes a base and a lateral mounting portion. The base is connected to the assist mechanism, and the lateral mounting portion is disposed on the base, with at least one first mounting hole. The multiple first mounting holes on the lateral mounting portion facilitate adjustment of the mounting position of the second connecting functional unit according to actual conditions.

[0006] Furthermore, the second connection functional unit includes a fourth connector, which includes a horizontal connecting portion. A transition portion is provided on one side of the horizontal connecting portion, and a first connector is provided above the horizontal connecting portion. The transition portion has at least one second mounting hole and a third mounting hole, which communicates with the second mounting hole located above it. The second mounting hole and the first mounting hole are connected by a connector, and the lower part of the connection mechanism passes through the third mounting hole of the transition portion and is located in the retaining spring groove of the connector.

[0007] Preferably, the connecting mechanism includes a spring pin housing, a spring pin, a spring, and a spring pin cover. The spring pin housing has a cavity inside and a set of openings in the upper circumferential direction. The spring pin cover is located above the spring pin housing and has a set of extensions at its lower part. The extensions are located at the openings of the spring pin housing, and the two cooperate with each other. One end of the spring pin is located in the cavity of the spring pin housing and extends into the spring pin cover. The other end passes through the third through hole on the second connecting functional unit and is inserted into the connector used to connect the first and second connecting functional units. The spring pin is equipped with a spring, and the inner side of the cavity of the spring pin housing has a boss for limiting the position of the spring. The connecting mechanism adopts a unique structural design. During operation, pressing the spring pin cover controls the insertion or disengagement of the spring pin into the retaining spring groove of the connector, enabling quick installation and disassembly with a single button.

[0008] More preferably, the lower part of the spring pin is provided with a connecting portion for engaging with the retaining ring groove on the connector, and the connecting portion has inclined surfaces at its top and bottom. The inclined surfaces facilitate the connecting portion entering and exiting the retaining ring groove.

[0009] More preferably, the first connecting functional unit further includes a reinforcing portion, one end of which is connected to the base, and the other end of which is connected to the end of the lateral mounting portion away from the base. The reinforcing portion effectively improves the structural strength of the first connecting functional unit and extends its service life.

[0010] In addition, a second connector is included, which is disposed opposite to the first connector and both have openings. At least one set of slotted holes is located on the outer side of the openings, and the two are connected by a set of bolts. The slotted holes allow for adjustment of the bolt installation position as needed, thus adapting to the installation requirements of frames with different tube diameters and better meeting installation needs.

[0011] This utility model also includes a wheelchair, comprising the aforementioned power-assist device, a wheelchair frame, and drive wheels. The drive wheels are located on the outer side of the wheelchair frame and are coaxially connected to the wheelchair frame, the second connecting member, and the first connecting member. By connecting the optimized power-assist device to the wheelchair, automatic movement is achieved by driving the drive wheels through the power-assist device, effectively solving the problem of user mobility difficulties without assistance.

[0012] Furthermore, the wheelchair frame includes a first wheelchair frame and a second wheelchair frame, the second wheelchair frame being connected to the first wheelchair frame; and the second wheelchair frame is provided with a third connector, the third connector having a through hole, the third connector being located at an opening opposite to the first connector and the second connector, and being connected by a connecting shaft.

[0013] Preferably, the first wheelchair frame is horizontally positioned between the first and second connecting members in the second connecting functional unit, and below the bolt inside the waist hole; the second wheelchair frame is vertically positioned between the first and second connecting members, and between the two sets of bolts. The bolts can respectively restrict the position of the first and second wheelchair frames, further improving their installation stability.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1. The power assist device described in this utility model enables the wheelchair to move automatically by installing a power assist mechanism on it, which effectively solves the many inconveniences caused to users when there is no one else to help them; the second connecting functional unit is connected to the wheelchair, and the connecting mechanism enables the quick assembly and disassembly of the first connecting functional unit and the second connecting functional unit, simplifying the assembly and disassembly steps of the power assist mechanism and the wheelchair, effectively improving the assembly and disassembly efficiency of the power assist mechanism, and allowing it to better meet the needs of users.

[0015] 2. The connecting mechanism described in this utility model adopts a unique structural design. During operation, the spring pin can be inserted into or disengaged from the snap ring groove of the connecting piece by pressing the spring pin cover, so as to achieve quick installation and disassembly.

[0016] 3. The cooperation between the first wheelchair frame and the second wheelchair frame and the corresponding bolts can restrict the position of the first wheelchair frame and the second wheelchair frame respectively through the bolts, thereby further improving the stability of their installation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assistive device described in this utility model; Figure 2 This is a schematic diagram showing the connection between the first connecting functional unit and the second connecting functional unit in this utility model; Figure 3 This is a partial cross-sectional view of the connection between the first connecting functional unit and the second connecting functional unit in this utility model; Figure 4 This is a schematic diagram of the structure of the first connecting functional unit in this utility model; Figure 5 This is a schematic diagram of the structure of the second connecting functional unit in this utility model; Figure 6 This is a schematic diagram of the connecting mechanism in this utility model; Figure 7 This is a cross-sectional view of the connecting mechanism in this utility model; Figure 8 This is a schematic diagram showing the installation of the power assist device and the wheelchair in this utility model; In the diagram: 1. Assist mechanism; 2. First connecting functional unit; 3. Second connecting functional unit; 4. Connecting mechanism; 21. Base; 22. Lateral mounting part; 23. Reinforcing part; 24. Auxiliary reinforcing member; 221. First mounting hole; 31. Fourth connecting member; 32. Second connecting member; 33. Waist hole; 311. Horizontal connecting part; 312. Adapter part; 313. First connecting member; 3121. Second mounting hole; 3122. Third mounting hole; 41. Spring pin housing; 42. Spring pin; 43. Spring; 44. Spring pin cover; 441. Extension part; 411. Opening; 412. Boss; 5. Connector; 6. Wheelchair frame; 61. First wheelchair frame; 62. Second wheelchair frame; 621. Third connecting member; 7. Drive wheel. Detailed Implementation

[0018] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0019] Example 1 like Figure 1 The power assist device shown includes: A power assist mechanism 1 for assisting wheelchair operation and a first connecting functional unit 2, wherein the first connecting functional unit 2 is connected to the power assist mechanism 1; The second connection functional unit 3 is connected to the wheelchair; It also includes a connection mechanism 4 for quick assembly and disassembly. The first connection function unit 2 and the second connection function unit 3 are connected by the connection mechanism 4 to achieve quick assembly and disassembly.

[0020] like Figure 2 and Figure 3 The first connection function unit 2 shown includes a base 21 and a lateral mounting part 22. The base 21 is connected to the assist mechanism 1. The lateral mounting part 22 is disposed on the base 21 and has at least one first mounting hole 221.

[0021] like Figure 4 The second connection functional unit 3 shown includes a fourth connector 31, which includes a horizontal connecting portion 311. A transition portion 312 is provided on one side of the horizontal connecting portion 311, and a first connector 313 is provided above the horizontal connecting portion. The transition portion 312 has at least one second mounting hole 3121 and a third mounting hole 3122, which communicates with the upper second mounting hole 3121. The second mounting hole 3121 and the first mounting hole 221 are connected by a connector 5. The lower part of the connecting mechanism 4 passes through the third mounting hole of the transition portion 312 and is located in the retaining ring groove of the connector 5. In this embodiment, the connector 5 is preferably a locating pin. However, it is conceivable that other suitable connectors, such as cylindrical pins, can be selected according to actual installation needs to meet the installation requirements.

[0022] like Figures 5 to 6 The connecting mechanism 4 shown includes a spring pin housing 41, a spring pin 42, a spring 43, and a spring pin cover 44. The spring pin housing 41 has a cavity inside and a set of openings 411 in the upper circumferential direction. The spring pin cover 44 is located above the spring pin housing 41 and has a set of extensions 441 at its lower part. The extensions 441 are located at the openings 411 of the spring pin housing 41, and the two cooperate with each other. One end of the spring pin 42 is located in the cavity of the spring pin housing 41 and extends into the spring pin cover 44. The other end passes through the third through hole on the second connecting functional unit 3 and is inserted into the connector 5 used for connecting the first connecting functional unit 2 and the second connecting functional unit 3. The spring pin 42 is provided with a spring 43, and the inner side of the cavity of the spring pin housing 41 is provided with a boss 412 for limiting the position of the spring 43. In this embodiment, the lower part of the spring pin housing 41 is preferably provided with threads, which are threaded to the adapter part 312 of the fourth connector 31. The upper part of the spring pin 42 is threaded to the spring pin housing 41. It should be noted that it can also be adjusted according to actual needs to meet the installation requirements.

[0023] As shown in the figure, the lower part of the spring pin 42 is provided with a connecting part 421 for cooperating with the retaining ring groove on the connector 5. The connecting part 421 has inclined surfaces on its upper and lower sides. The inclined surfaces facilitate the connection part 421 to enter and disengage from the retaining ring groove. During operation, when the spring pin cover 44 is pressed, it will drive the spring pin 42 to move downward. If the pressure is continued, the spring pin 42 will continue to move downward, and the spring 43 will be compressed until the connecting part 421 at the lower part of the spring pin 42 is fully inserted into the retaining ring groove of the connector 5, thus achieving connection. When disassembly is required, pressing the spring pin cover 44 will cause the connecting part 421 at the lower part of the spring pin 42 to disengage from the retaining ring groove of the connector 5 under the action of the spring 43 until it is completely separated from the retaining ring groove of the connector 5, thus releasing the lock, removing the connector 5, and separating the first connecting functional unit 2 and the second connecting functional unit 3.

[0024] A preferred embodiment also includes a second connector 32, which is disposed opposite to the first connector 313 and both have openings. At least one set of waist holes 33 are provided on the outside of the openings, and the two are connected by a set of bolts.

[0025] The preferred solution in this embodiment is, for example... Figure 2 and Figure 3 The first connecting functional unit 2 shown also includes a reinforcing part 23, one end of which is connected to the base 21, and the other end is connected to the end of the lateral mounting part 22 away from the base 21. An auxiliary reinforcing member 24 is provided on the base 21 outside the reinforcing part 23, and the auxiliary reinforcing member 24 is connected to the lateral mounting part 22.

[0026] Example 2 like Figure 8 As shown, this embodiment provides a wheelchair, which includes the power assist device described in Embodiment 1, and also includes a wheelchair frame 6 and a drive wheel 7. The drive wheel 7 is located on the outside of the wheelchair frame 6, and the drive wheel 7 is coaxially connected to the wheelchair frame 6, the second connecting member 32 and the first connecting member 313.

[0027] like Figure 8 The wheelchair frame 6 shown includes a first wheelchair frame 61 and a second wheelchair frame 62, with the second wheelchair frame 62 connected to the first wheelchair frame 61. The second wheelchair frame 62 is provided with a third connector 621, which has a through hole. The third connector 621 is positioned opposite the openings of the first connector 313 and the second connector 32, and is connected via a connecting shaft. The drive wheel 7 is coaxially connected to the second connector 32, the third connector 621, and the first connector 313.

[0028] like Figure 8The first wheelchair frame 61 is horizontally positioned between the first connector 313 and the second connector 32 in the second connecting functional unit 3, and below the bolts inside the waist hole; the second wheelchair frame 62 is vertically positioned between the first connector 313 and the second connector 32, and between the two sets of bolts. During installation, the position of the bolts inside the waist hole can be adjusted according to the pipe diameter of the first wheelchair frame 61 and the second wheelchair frame 62 in the wheelchair. Simultaneously, the positions of the first wheelchair frame 61 and the second wheelchair frame 62 can be restricted by the bolts.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. An assistive device, characterized in that: include: A power assist mechanism (1) for assisting wheelchair operation and a first connecting functional unit (2), wherein the first connecting functional unit (2) is connected to the power assist mechanism (1); The second connection function unit (3) is connected to the wheelchair; It also includes a connection mechanism (4) for quick assembly and disassembly, wherein the first connection function unit (2) and the second connection function unit (3) are connected by the connection mechanism (4) to achieve quick assembly and disassembly.

2. The power assist device according to claim 1, characterized in that: The first connection function unit (2) includes a base (21) and a side mounting part (22). The base (21) is connected to the assist mechanism (1). The side mounting part (22) is disposed on the base (21) and has at least one first mounting hole (221).

3. The power assist device according to claim 2, characterized in that: The second connection function unit (3) includes a fourth connector (31), the fourth connector (31) includes a horizontal connection part (311), a transition part (312) is provided on one side of the horizontal connection part (311), a first connector (313) is provided above the horizontal connection part, the transition part (312) is provided with at least one second mounting hole (3121), and the transition part (312) is also provided with a third mounting hole (3122), the third mounting hole (3122) communicates with the second mounting hole (3121) located above; and the second mounting hole (3121) and the first mounting hole (221) are connected by a connector (5), and the lower part of the connection mechanism (4) passes through the third mounting hole of the transition part (312) and is located in the snap ring groove of the connector (5).

4. The power assist device according to claim 3, characterized in that: The connecting mechanism (4) includes a spring pin housing (41), a spring pin (42), a spring (43), and a spring pin cover (44). The spring pin housing (41) has a cavity inside and a set of openings (411) in the upper circumferential direction. The spring pin cover (44) is located above the spring pin housing (41) and has a set of extensions (441) at its lower part. The extensions (441) are located at the openings (411) of the spring pin housing (41), and the two cooperate with each other. One end of the spring pin (42) is located in the cavity of the spring pin housing (41) and extends into the spring pin cover (44). The other end passes through the third through hole on the second connecting functional unit (3) and is inserted into the connector (5) for connecting the first connecting functional unit (2) and the second connecting functional unit (3). The spring pin (42) is provided with a spring (43), and the inner side of the cavity of the spring pin housing (41) is provided with a boss (412) for limiting the position of the spring (43).

5. The power assist device according to claim 4, characterized in that: The lower part of the spring pin (42) is provided with a connecting part (421) for cooperating with the retaining spring groove on the connector (5), and the upper and lower parts of the connecting part (421) are provided with inclined surfaces.

6. The power assist device according to claim 3, characterized in that: The first connection function unit (2) further includes a reinforcing part (23), one end of which is connected to the base (21), and the other end is connected to the end of the lateral mounting part (22) away from the base (21).

7. The power assist device according to claim 4, characterized in that: It also includes a second connector (32), which is disposed opposite to the first connector (313), and both are provided with openings. At least one set of waist holes (33) are provided on the outside of the openings, and the two are connected by a set of bolts.

8. A wheelchair, characterized in that: The assistive device according to any one of claims 3 to 7 further includes a wheelchair frame (6) and a drive wheel (7), the drive wheel (7) being disposed on the outside of the wheelchair frame (6), and the drive wheel (7) being coaxially connected to the wheelchair frame (6), the second connector (32) and the first connector (313).

9. The wheelchair according to claim 8, characterized in that: The wheelchair frame (6) includes a first wheelchair frame (61) and a second wheelchair frame (62), the second wheelchair frame (62) being connected to the first wheelchair frame (61); and the second wheelchair frame (62) is provided with a third connector (621), the third connector (621) being provided with a through hole, the third connector (621) being located at the opposite position of the openings on the first connector (313) and the second connector (32), and being connected by a connecting shaft.

10. The wheelchair according to claim 9, characterized in that: The first wheelchair frame (61) is horizontally positioned between the first connector (313) and the second connector (32) in the second connecting functional unit (3), and positioned below the bolt inside the waist hole; the second wheelchair frame (62) is vertically positioned between the first connector (313) and the second connector (32), and positioned between the two sets of bolts.

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