Motion assist device for a smart bed

Abstract

The application provides a motion assisting device of an intelligent bed, comprising a frame, a driving assembly, a jacking assembly and a transmission assembly, the frame is suitable for being connected with a bed frame, the driving assembly is connected with the frame, the jacking assembly is connected with the driving assembly, the jacking assembly is configured to generate reciprocating motion under the driving of the driving assembly, the transmission assembly is arranged between the driving assembly and the jacking assembly to transmit the driving force on the driving assembly to the jacking assembly, and the transmission assembly is configured to amplify the driving force. The motion assisting device of the intelligent bed with the structure amplifies the driving force on the jacking assembly transmitted by the driving assembly by arranging the transmission assembly between the driving assembly and the jacking assembly, and compared with directly driving the lifting mechanism by using a crank or a screw rod, the structure reduces the power of the driving assembly under the same bearing force, and guarantees personal safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motion assisting device, in particular to a motion assisting device of an intelligent bed. BACKGROUND

[0002] The massage bed in the prior art usually comprises a mechanism frame installed on a bed frame, a driving motor installed on the mechanism frame, a lifting plate connected to a part of the mattress close to the waist, and a lifting mechanism connected to the lifting plate. The output shaft of the driving motor is drivingly connected to the lifting mechanism through a driving device to drive the lifting mechanism to move up and down repeatedly to realize the waist movement. At present, the driving device usually adopts a crank directly driven by the driving motor, and the crank is connected to the lifting connecting rod in the lifting mechanism to make it move up and down repeatedly along the guide device; or a lead screw driven by the driving motor, and the motor is reversed to realize the lifting mechanism to move up and down repeatedly.

[0003] However, the massage bed described above, since the motor directly drives the lifting mechanism by using a crank or a lead screw, in order to realize the up and down movement of the human body, the torque output by the motor will be relatively large, and the motor cannot run at a constant speed during operation, the rising speed is slow, the falling speed is fast, the motor power is large, the current and voltage are increased, and there is a certain hidden danger to the personal safety of the human body. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is that in the massage bed in the prior art, only a crank or a lead screw is used to directly drive the lifting mechanism, in order to realize the up and down movement of the human body, the torque output by the motor will be relatively large, and the motor cannot run at a constant speed during operation, the rising speed is slow, the falling speed is fast, the motor power is large, the current and voltage are increased, and there is a certain hidden danger to the personal safety of the human body.

[0005] Therefore, the present application provides a motion assisting device of an intelligent bed, which comprises:

[0006] a frame adapted to be connected to a bed frame;

[0007] a driving assembly connected to the frame;

[0008] a lifting assembly connected to the driving assembly, the lifting assembly being configured to generate a reciprocating motion driven by the driving assembly;

[0009] a transmission assembly arranged between the driving assembly and the lifting assembly to transmit a driving force of the driving assembly to the lifting assembly, and the transmission assembly being configured to amplify the driving force.

[0010] Optionally, the transmission assembly comprises:

[0011] an intermediate piece rotatably connected to the frame at both ends;

[0012] a power arm rod, one end of which is connected to one end of the intermediate piece, and the other end of the power arm rod is connected to the driving assembly, and the distance from the connection position of the power arm rod and the driving assembly to the axis of the intermediate piece is L1;

[0013] a resistance arm rod, one end of which is connected to the other end of the intermediate piece, and the other end of the resistance arm rod is connected to the jacking assembly, and the distance from the connection position of the resistance arm rod and the jacking assembly to the axis of the intermediate piece is L2;

[0014] wherein L1>L2, and the intermediate piece rotates around its axis under the action of the power arm rod to drive the movement of the resistance arm rod.

[0015] Optionally, the end of the power arm rod is provided with a through hole, and the driving end of the driving assembly is slidingly arranged in the through hole.

[0016] Optionally, the transmission assembly comprises:

[0017] a driving wheel connected to the driving end of the driving assembly;

[0018] an intermediate wheel rotationally connected to the frame;

[0019] an action wheel rotationally connected to the frame, and the action wheel is connected to the jacking assembly;

[0020] wherein a transmission belt is arranged between the driving wheel and the intermediate wheel, and between the intermediate wheel and the action wheel, and the transmission ratio of the driving wheel and the action wheel is greater than 1.

[0021] Optionally, the transmission ratio of the driving wheel and the action wheel is 9.

[0022] Optionally, the jacking assembly comprises:

[0023] a base connected to the frame, and a through hole is arranged in the interior of the base;

[0024] a top rod, one end of which penetrates through the base and is connected to the transmission assembly, and the top rod is configured to reciprocate in the through hole of the base under the driving of the transmission assembly;

[0025] a resilient member connected to the top rod, and the resilient member has an elastic force to drive the top rod to move reversely when the top rod is driven by the transmission assembly to move into the base.

[0026] Optionally, one end of the top rod away from the transmission assembly is provided with a blind hole, a through hole is arranged in the side wall of the blind hole, and the resilient member is arranged in the blind hole, and further comprising:

[0027] a bottom plate arranged in the blind hole and connected to the resilient member, and the side edge of the bottom plate protrudes out of the through hole in the side wall of the blind hole.

[0028] a top plate connected with the top rod end to close the blind hole.

[0029] Optionally, the jacking assembly comprises:

[0030] a transmission member provided with a through hole;

[0031] an eccentric member arranged in the through hole of the transmission member, the eccentric member being coaxially connected with the action wheel, and the eccentric member being configured to rotate in the through hole of the transmission member to drive the transmission member to move under the drive of the action wheel;

[0032] a base connected with the frame, the base being internally provided with a through hole;

[0033] a top rod having one end penetrating through the through hole of the base and connected with the transmission member, the top rod being configured to reciprocate in the through hole of the base under the drive of the transmission member.

[0034] Optionally, a bearing member is arranged between the transmission member and the eccentric member.

[0035] Optionally, an O-ring is arranged between the top rod and the sidewall of the through hole of the base.

[0036] The motion assisting device of the intelligent bed has the following advantages:

[0037] 1. The motion assisting device of the intelligent bed comprises a frame, a driving assembly, a jacking assembly and a transmission assembly, the frame being adapted to be connected with a bed frame, the driving assembly being connected with the frame, the jacking assembly being connected with the driving assembly and being configured to generate reciprocating motion under the drive of the driving assembly, and the transmission assembly being arranged between the driving assembly and the jacking assembly to transmit the driving force on the driving assembly to the jacking assembly and being configured to amplify the driving force.

[0038] The motion assisting device of the intelligent bed has the following advantages:

[0039] 2.The motion assisting device of the smart bed, the transmission assembly comprises an intermediate piece, a power arm rod and a resistance arm rod, the intermediate piece is rotatably connected to the frame at both ends; one end of the power arm rod is connected to one end of the intermediate piece, the other end of the power arm rod is connected to the driving assembly, the distance from the connection position of the power arm rod and the driving assembly to the axis of the intermediate piece is L1; one end of the resistance arm rod is connected to the other end of the intermediate piece, the other end of the resistance arm rod is connected to the jacking assembly, the distance from the connection position of the resistance arm rod and the jacking assembly to the axis of the intermediate piece is L2; wherein L1>L2, and the intermediate piece is rotatable around its axis under the action of the power arm rod to drive the movement of the resistance arm rod.

[0040] The motion assisting device of the smart bed with the structure, the distance from the connection position of the power arm rod and the driving assembly to the axis of the intermediate piece is L1, the distance from the connection position of the resistance arm rod and the jacking assembly to the axis of the intermediate piece is L2, L1>L2, and the lever principle is used to increase the carrying capacity of the jacking assembly, and the power of the servo motor is reduced under the same bearing capacity, and the personal safety is ensured.

[0041] 3.The motion assisting device of the smart bed, the transmission assembly comprises a driving wheel, an intermediate wheel and an action wheel, the driving wheel is connected to the driving end of the driving assembly; the intermediate wheel is rotatably connected to the frame; the action wheel is rotatably connected to the frame and connected to the jacking assembly; wherein the driving wheel and the driving wheel are provided with a transmission belt, and the transmission ratio of the driving wheel and the action wheel is greater than 1.

[0042] The motion assisting device of the smart bed with the structure, the intermediate wheel and the action wheel, and the driving wheel and the driving wheel are all driven by the belt, which can reduce the noise compared with the gear transmission, and the transmission ratio of the driving wheel and the action wheel is greater than 1, which can reduce the power of the servo motor under the same bearing capacity, and ensure the personal safety.

[0043] 4.The motion assisting device of the smart bed provided in the embodiment 1 of the present application, the jacking assembly base, the jacking rod, the elastic member, the bottom plate and the top plate, the base is fixedly connected with the upper side of the frame, the inside of the base is provided with a through hole, the lower end of the jacking rod penetrates through the through hole in the base and is hingedly connected with the resistance arm rod, so that when the resistance arm rod swings around the axis of the middle piece, the jacking rod can be driven to move up and down in the inside of the base. The upper end of the jacking rod is provided with a blind hole, the elastic member such as a spring is placed in the blind hole, two symmetrical waist-shaped through holes are formed in the bottom side wall of the blind hole, the bottom of the elastic member is fixedly connected with the bottom plate, the side wall of the bottom plate is provided with two protrusions, the protrusions are slidingly arranged in the waist-shaped through holes in the side wall of the blind hole, and the top plate is fixedly connected with the upper end of the jacking rod to block the elastic member in the blind hole. When installed, the bottom of the waist-shaped through hole on the jacking rod is lower than the upper end of the base, so that when the jacking rod moves downward, the two protrusions on the side wall of the bottom plate can abut against the upper end of the base, and the upper end of the elastic member is limited by the top plate, so that when the jacking rod moves downward, the elastic member will be extruded to be elastically deformed, the kinetic energy of the jacking rod running downward is stored, the kinetic energy is released when the jacking rod runs upward, the impact of reaching the lowest point is slowed down, and the upward running is assisted. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the present application, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0045] Figure 1 The structural schematic view of the motion assisting device of the smart bed provided in the embodiment 1 of the present application;

[0046] Figure 2 The exploded view of the motion assisting device of the smart bed provided in the embodiment 1 of the present application after removing the frame;

[0047] Figure 3 The structural schematic view of the motion assisting device of the smart bed provided in the embodiment 2 of the present application;

[0048] Figure 4 The structural schematic view of the jacking assembly in the motion assisting device of the smart bed provided in the embodiment 2 of the present application;

[0049] Explanation of reference signs:

[0050] 1-frame;

[0051] 2-driving assembly;

[0052] 3-jacking assembly; 31-base; 32-jacking rod; 33-elastic member; 34-bottom plate; 35-top plate; 36-transmission member; 37-eccentric member;

[0053] 4 - transmission assembly; 41 - intermediate piece; 42 - power arm lever; 43 - resistance arm lever; 44 - drive wheel; 45 - intermediate wheel; 46 - action wheel. DETAILED DESCRIPTION

[0054] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are 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 of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0055] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0056] Embodiment 1

[0057] The present embodiment provides a motion assisting device for an intelligent bed, as shown in Figure 1 and Figure 2 , which comprises a frame 1, a drive assembly 2, a jacking assembly 3 and a transmission assembly 4.

[0058] In the present embodiment, as shown in Figure 1 , the frame 1 is a rectangular frame 1 structure welded by several square steels, which is used for fixed connection with a bed frame, and the drive assembly 2 is a servo motor fixed in the frame 1 through a fixed plate.

[0059] In the present embodiment, as shown in Figure 1 and Figure 2As shown, the transmission assembly 4 includes an intermediate piece 41, a power arm rod 42, and a resistance arm rod 43. The intermediate piece 41 is rotatably connected to the frame 1 at both ends. The power arm rod 42 is fixedly connected to the outer surface of one end of the intermediate piece 41. The other end of the power arm rod 42 is provided with a waist-shaped through hole. In use, the crank end protrusion on the driving end of the servo motor is arranged in the waist-shaped through hole, and a bearing is arranged between the two, so that when the servo motor is started, the rotation of the crank can make the crank end protrusion part slide in the waist-shaped through hole, thereby driving the power arm rod 42 to swing around the axis of the intermediate piece 41. The resistance arm rod 43 is fixedly connected to the outer surface of the other end of the intermediate piece 41 and is arranged on the same side as the power arm rod 42. When the power arm rod 42 swings around the axis of the intermediate piece 41, it can drive the resistance arm rod 43 to swing around the axis of the intermediate piece 41.

[0060] In this embodiment, as shown in Figure 1 and Figure 2 The jacking assembly 3 includes a base 31, a jacking rod 32, an elastic member 33, a bottom plate 34, and a top plate 35. The base 31 is fixedly connected to the upper side of the frame 1. The inside of the base 31 is provided with a through hole. The lower end of the jacking rod 32 penetrates through the through hole in the base 31 and is hinged to the resistance arm rod 43. Thus, when the resistance arm rod 43 swings around the axis of the intermediate piece 41, the jacking rod 32 can be driven to move up and down inside the base 31.

[0061] Further, the upper end of the jacking rod 32 is provided with a blind hole. An elastic member 33, such as a spring, is placed in the blind hole. The bottom side wall of the blind hole is provided with two symmetrical waist-shaped through holes. The bottom plate 34 is fixed to the bottom of the elastic member 33. The side wall of the bottom plate 34 is provided with two protrusions. The protrusions are slidingly arranged in the waist-shaped through holes in the side wall of the blind hole. The top plate 35 is fixed to the upper end of the jacking rod 32 to block the elastic member 33 in the blind hole. When installed, the bottom of the waist-shaped through hole on the jacking rod 32 should be lower than the upper end of the base 31. Thus, when the jacking rod 32 moves down, the two protrusions on the side wall of the bottom plate 34 can abut against the upper end of the base 31, and the upper end of the elastic member 33 is limited by the top plate 35. Therefore, when the jacking rod 32 moves down, the elastic member 33 will be squeezed and elastically deformed, storing the kinetic energy of the jacking rod 32 moving downward. When the jacking rod 32 moves upward, the kinetic energy is released, reducing the impact of reaching the lowest point, and providing assistance for upward movement.

[0062] In this embodiment, the distance from the connection between the power arm rod 42 and the driving assembly 2 to the axis of the intermediate piece 41 is L1, and the distance from the connection between the resistance arm rod 43 and the jacking rod 32 to the axis of the intermediate piece 41 is L2. L1 > L2, thereby increasing the carrying capacity of the jacking rod 32 moving up and down by the lever principle. Under the same carrying capacity, the power of the servo motor is reduced, which ensures personal safety.

[0063] Embodiment 2

[0064] The motion assisting device of the intelligent bed provided in this embodiment is different from that in Embodiment 1 in that

[0065] In this embodiment, as Figure 3 and Figure 4 As shown, there is a drive wheel 44, an intermediate wheel 45, and an action wheel 46. The drive wheel 44 is fixedly connected to the drive end of the servo motor, and the intermediate wheel 45 and the action wheel 46 are rotatably connected to the frame 1. A transmission belt is provided between the drive wheel 44 and the intermediate wheel 45, and between the intermediate wheel 45 and the action wheel 46. The transmission ratio between the drive wheel 44 and the action wheel 46 is greater than 1. In this embodiment, the transmission ratio is 9.

[0066] In this embodiment, as Figure 3 and Figure 4 As shown, the lifting assembly 3 includes a base 31, a push rod 32, a transmission component 36, and an eccentric component 37. The transmission component 36 is cam-shaped and has a through hole. The eccentric component 37 is located in the through hole of the transmission component 36, and a bearing is provided between the eccentric component 37 and the through hole of the transmission component 36. The eccentric component 37 is coaxially connected to the actuating wheel 46, so the rotation of the actuating wheel 46 can drive the eccentric component 37 to rotate. Due to the structure of the eccentric component 37, it can drive the transmission component 36 to move during its rotation. The transmission component 36 is hinged to the bottom end of the push rod 32, so the transmission component 36 can drive the push rod 32 to move up and down reciprocally inside the base 31.

[0067] In this embodiment, belt drives are used between the intermediate wheel 45 and the action wheel 46, and between the drive wheel 44 and the intermediate wheel 45. This reduces noise compared to gear drives. The transmission ratio between the drive wheel 44 and the action wheel 46 is 9, which reduces the power of the servo motor under the same load, thus ensuring personal safety. Two parallel bearings are provided between the eccentric part 37 and the through hole of the transmission part 36, which can improve the stability of the mechanism operation.

[0068] In this embodiment, annular grooves are provided at both the upper and lower ends of the through hole sidewall of the base 31, and an O-ring is placed inside the groove. The push rod 32 is sleeved inside the O-ring, which can reduce the contact between the push rod 32 and the through hole sidewall of the base 31 during movement, thereby reducing noise.

[0069] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A motion assist device for a smart bed, characterized by, include: Frame (1), used for connection with bed frame; The driving component (2) is connected to the frame (1); The lifting component (3) is connected to the driving component (2), and the lifting component (3) is configured to generate up-and-down reciprocating motion by being driven by the driving component (2); A transmission component (4) is disposed between the drive component (2) and the lifting component (3) to transmit the driving force on the drive component (2) to the lifting component (3), and the transmission component (4) is configured to amplify the driving force based on the lever principle; The transmission assembly (4) includes: Intermediate component (41), the two ends of which are rotatably connected to the frame (1); The power boom (42) has one end connected to one end of the intermediate member (41) and the other end connected to the drive assembly (2). The axial distance from the connection point of the power boom (42) and the drive assembly (2) to the intermediate member (41) is L1. A resistance arm (43) is provided, one end of which is connected to the other end of the intermediate component (41), and the other end of which is connected to the lifting assembly (3). The axial distance from the connection point of the resistance arm (43) and the lifting assembly (3) to the intermediate component (41) is L2. Wherein, L1>L2, and the intermediate member (41) has the ability to rotate around the axis of the intermediate member (41) under the action of the power arm (42) to drive the resistance arm (43) to move; The end of the power boom (42) is provided with a through hole, and the drive end of the drive assembly (2) is slidably disposed in the through hole.

2. The motion-assist device for a smart bed of claim 1, wherein, The lifting assembly (3) includes: The base (31) is connected to the frame (1), and the base (31) has a through hole inside; Top rod (32), one end of which passes through the base (31) and is connected to the transmission assembly (4), the top rod (32) is configured to be driven by the transmission assembly (4) to reciprocate up and down in the through hole of the base (31); The elastic element (33) is connected to the top rod (32). When the top rod (32) is driven by the transmission assembly (4) to move into the base (31), the elastic element (33) has an elastic force that drives the top rod (32) to move in the opposite direction.

3. The motion-assist device for a smart bed of claim 2, wherein, The top rod (32) has a blind hole at one end away from the transmission assembly (4), and the side wall of the blind hole has a through hole. The elastic element (33) is disposed in the blind hole. The lifting assembly (3) also includes: The base plate (34) is disposed in the blind hole and connected to the elastic member (33), and the side of the base plate (34) protrudes from the through hole of the side wall of the blind hole; The top plate (35) is connected to the end of the top rod (32) to close the blind hole.

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