CN210612402U

CN210612402U - Angle-controllable four-bar linkage mechanism for assisting in turning over

Info

Publication number: CN210612402U
Application number: CN201920851029.9U
Authority: CN
Inventors: 熊志鹏; 姚志恒; 杨震远; 应家浩; 邢饶佳; 张毫杰
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-05-26
Anticipated expiration: 2029-06-06

Abstract

An angle-controllable turn-over assisting four-bar linkage mechanism comprises: a frame body; the transmission device is arranged on the frame body and is provided with a power input end and at least one power output end, the power input end is connected with external driving equipment, and the power output end is connected with the four-bar mechanism and is used for transmitting the power of the external driving equipment to the four-bar mechanism; and the four-bar mechanism comprises at least one set of turning sub-connecting rod, the connecting end of the turning sub-connecting rod is hinged at the power output end of the transmission device, and the turning part of the turning sub-connecting rod extends to the bed board of the nursing bed. The utility model has the advantages that: can assist nursing staff to help the old person of inconvenient action to stand up, can also assist the old person to stand up the back and stabilize the body, be favorable to medical personnel to help the old person to change and realize operations such as doing washing, the practicality is stronger, the structure is simpler, the operation is more simple and convenient, the cost of manufacture is lower, adapt to all bed heights, occupation space is little.

Description

Angle-controllable four-bar linkage mechanism for assisting in turning over

Technical Field

The utility model relates to a controllable supplementary four-bar linkage that stands up of angle belongs to medical instrument technical field.

Background

The auxiliary turning-over four-bar mechanism is a device specially used for helping nursing personnel to turn over for the old people who need to lie in bed for a long time, can be applied in hospitals and homes, is convenient to turn to the body and prevents the old people who lie in bed for a long time from growing bedsores. The four connecting rods rotate to push the bent rods to rotate, so that the purpose of enabling the old people to turn over or lie on the side can be achieved, and the angle of the old people lying on the side and the turning speed can be changed according to the needs of the old people. The turnover assisting four-bar linkage mechanism plays a crucial role in the whole turnover process, can determine the operability of the nursing staff in work, and can assist the nursing staff to independently complete the work of turning over, changing clothes, wiping the body and the like for the old without the help of other people particularly when the nursing staff encounters the old with large weight. Most of the existing turning-over devices are in a bed form, have large occupied area and higher price, are mostly used in hospitals, have great difficulty in application and popularization of families, and are particularly suitable for families with old people or patients lying in bed for a long time.

Disclosure of Invention

In order to solve the problem, the utility model provides a when can assist nursing staff help the old person of inconvenient action to stand up, can also assist the old person and stand up the back and stabilize the body, be favorable to medical personnel help the old person to change the controllable supplementary four-bar linkage that stands up of angle that realizes operations such as doing washing thing.

An angle controllable assists and stands up four-bar linkage, a serial communication port, include:

a frame body;

the transmission device is arranged on the frame body and is provided with a power input end and at least one power output end, the power input end is connected with external driving equipment, and the power output end is connected with the four-bar mechanism and is used for transmitting the power of the external driving equipment to the four-bar mechanism;

and the four-bar mechanism comprises at least one set of turning sub-connecting rod, the connecting end of the turning sub-connecting rod is hinged to the power output end of the transmission device, and the turning part of the turning sub-connecting rod extends onto a bed plate of the nursing bed and is used for being inserted into a gap between the nursing bed and the back of a user to turn over a person lying on the nursing bed.

The transmission device comprises a belt pulley assembly, a worm and gear assembly and a bevel gear assembly, wherein a driven belt pulley of the belt pulley assembly is in belt connection with a driving belt pulley of external driving equipment;

the worm and gear assembly comprises a worm, two worm gears meshed with the worm and a worm gear mounting shaft for mounting the worm gears, the worm and the worm gear mounting shaft are respectively mounted on the frame body through corresponding bearing horizontal frames and keep the worm meshed with the worm gears; a driven belt pulley as a power input end is fixedly arranged on a worm of the worm and gear assembly to realize synchronous rotation of the driven belt pulley and the worm;

the bevel gear assembly comprises a first bevel gear, a second bevel gear and a bevel gear mounting shaft, and two first bevel gears are fixedly mounted on the worm gear mounting shaft; the two bevel gear mounting shafts are arranged on the frame body through corresponding bearing horizontal frames and are kept parallel to each other; two second bevel gears are installed on the bevel gear installation shaft, and the second bevel gears are meshed with a first bevel gear arranged on the worm gear installation shaft, so that the bevel gear installation shaft becomes a power output end for fixedly connecting with an installation end of the four-bar mechanism.

The left end of the first connecting rod and the left end of the third connecting rod are fixedly arranged on two bevel gear mounting shafts which are parallel to each other through T-shaped fixing blocks respectively, and the angle of the four-bar mechanism is adjusted by controlling the rotation angle of the bevel gear mounting shafts.

The worm is perpendicular with the worm wheel installation axle, and the worm is parallel with the bevel gear installation axle to a worm corresponds two worm wheel installation axles and two bevel gear installation axles.

The turnover sub-connecting rod comprises a first connecting rod, a second connecting rod, a third connecting rod, a connecting straight rod and a bent rod, wherein the first connecting rod, the second connecting rod and the third connecting rod are sequentially hinged, the rest end part of the first connecting rod and the rest end part of the third connecting rod are fixedly arranged on different power output ends of the transmission device respectively to form a four-connecting-rod mechanism, the first end of the connecting straight rod is hinged at the hinged part of the second connecting rod and the third connecting rod, the second end of the connecting straight rod is connected with the first end of the bent rod, and the second end of the bent rod extends to a bed board of the nursing bed as a turnover part and is used for being inserted into a gap between the nursing bed and the back of a user to turn over a person lying on the nursing bed.

The turning-over part of the bent rod is sunken downwards to form an arc shape matched with the back of a user, and the turning-over part of the bent pipe can be sleeved with a bent rod sleeve to increase the comfort level of the user.

Turning over: the support body is the aluminium alloy to through angle seat mounting interconnect, first electric putter passes through the bottom sprag board to be fixed in the bottom frame, supports the elevating rack through top fixed plate simultaneously, makes the machine divide into about separable and elevating rack liftable two parts frame. The first speed reducing motor is fixed at the bottom of the lifting rack through a motor fixing frame, the output end of the first speed reducing motor is connected with the driving synchronous wheel on the driven shaft through a coupler, and the other end of the first speed reducing motor is fixed through a bearing seat so that the driven shaft is stressed uniformly. The driving synchronizing wheel is transmitted to the driven synchronizing wheel through a belt so as to drive a shaft where a worm and a gear rotate, and meanwhile, the four-bar mechanism on the T-shaped fixing block is driven to rotate through mutual transmission of the bevel gear components so as to drive the bent rod to rotate. The four-bar mechanism is connected with the bent rod through a shaft end connecting piece, and the massage unit is connected with the lifting frame through a telescopic sliding rail, so that the massage unit can extend in and out.

The utility model has the advantages that: can assist nursing staff to help the old person who moves inconveniently to stand up, can also assist the old person to stand up the back and stabilize the body, be favorable to medical personnel to help the old person to change and realize operations such as doing washing clothes. The machine also supports the old with inconvenient actions to turn over or realize the lateral lying posture by self; has the advantages of stronger practicability, simpler structure, simpler and more convenient operation, lower manufacturing cost, suitability for all bed heights, small occupied space and the like.

Drawings

Fig. 1 is a structural view of the present invention.

Fig. 2 is a structural view of the transmission device of the present invention.

Fig. 3 is a structural diagram of the force-bearing structure of the bending rod of the present invention (F1, F2 are the force-bearing directions of the bending rod).

Fig. 4 is a schematic view of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

With reference to the accompanying drawings:

embodiment 1 a controllable supplementary four bar linkage that stands up of angle, include:

a frame body 1;

the transmission device 2 is arranged on the frame body 1, is provided with a power input end and at least one power output end, is connected with external driving equipment at the power input end, and is connected with the four-bar mechanism at the power output end for transmitting the power of the external driving equipment to the four-bar mechanism;

and a four-bar linkage 3, including at least one set of turning sub-connecting rod 31, the link end of the turning sub-connecting rod is hinged on the power output end of the transmission device, and the turning part of the turning sub-connecting rod extends to the bed board of the nursing bed, and is used for inserting into the gap between the nursing bed and the back of the user to turn over the person lying on the nursing bed.

The transmission device 2 comprises a belt pulley assembly 21, a worm gear assembly 22 and a bevel gear assembly 23, wherein a driven belt pulley 211 of the belt pulley assembly 21 is in belt connection with a driving belt pulley of an external driving device;

the worm and gear assembly 22 comprises a worm 221, two worm gears 222 meshed with the worm and a worm gear mounting shaft 223 for mounting the worm gears, the worm 221 and the worm gear mounting shaft 223 are respectively horizontally mounted on the frame body 1 through corresponding bearings, and the worm 221 and the worm gears 222 are kept meshed; a driven belt pulley 211 serving as a power input end is fixedly arranged on the worm of the worm and gear assembly 22, so that the driven belt pulley and the worm rotate synchronously;

the bevel gear assembly 23 comprises a first bevel gear 231, a second bevel gear 232 and a bevel gear mounting shaft 233, and two first bevel gears 231 are fixedly mounted on the worm gear mounting shaft; the two bevel gear mounting shafts 233 are mounted on the frame body 1 through corresponding bearing horizontal frames, and the two bevel gear mounting shafts 233 are kept parallel to each other; two second bevel gears 232 are mounted on the bevel gear mounting shaft 233, and the second bevel gears 232 are meshed with the first bevel gears 231 arranged on the worm gear mounting shaft 223, so that the bevel gear mounting shaft 223 becomes a power output end for fixedly connecting with a mounting end of the four-bar linkage mechanism.

The turning sub-connecting rod 31 comprises a first connecting rod 311, a second connecting rod 312, a third connecting rod 313, a connecting straight rod 314 and a bent rod 315, wherein the first connecting rod 311, the second connecting rod 312 and the third connecting rod 313 are sequentially hinged, the rest end part of the first connecting rod 311 and the rest end part of the third connecting rod 313 are respectively and fixedly arranged on two different power output ends of a transmission device to form a four-connecting-rod mechanism, the first end of the connecting straight rod is hinged at the hinged part of the second connecting rod and the third connecting rod, the second end of the connecting straight rod is connected with the first end of the bent rod, and the second end of the bent rod is used as a turning part to extend to a bed plate of the nursing bed and is used for being inserted into a gap between the nursing bed and the back of a user to turn over a person lying on.

The lengths of the first connecting rod 311 and the second connecting rod 312 are equal, and the length of the second connecting rod 312 is equal to the distance between two bevel gear mounting shafts, so that a quadrangle formed by the first connecting rod 311, the second connecting rod 312 and the third connecting rod 313 is a parallelogram, and the first ends of the second connecting rod 312, the third connecting rod 313 and the connecting straight rod are connected together through a shaft end connecting piece.

Turning over the device: the main body part consists of a four-bar mechanism, a straight bar and a bent bar. Wherein the rod piece is connected with the rod piece through a revolute pair. The size proportion between the rod pieces can be adjusted according to the actual situation to obtain mechanisms with different turning-over speeds and different turning-over angle ranges. Meanwhile, the distance between the rod pieces can be adjusted to obtain mechanisms with different turning-over characteristics. When a plurality of groups of mechanisms are combined together, the pressure intensity can be greatly reduced, and the comfort level of people is increased.

The utility model discloses a curved bar member surface part material can select according to actual conditions, both can be the chromium plating stainless steel that intensity is big, also can increase surface contact area through flat shape sleeve cover on the pole and improve comfort level and pleasing to the eye degree. When different materials are used, the maximum gravitational force that can be borne is also different. Taking 10mm diameter chromium-plated stainless steel as an example, when the four-bar linkage rod and the bent rod are made of the material, the stress analysis can obtain the result that when the applied force is less than or equal to 300N, the stress is less than the maximum allowable stress. Thus providing a high load bearing linkage.

The utility model discloses a thereby the rotary motion of four connecting rods drives the knee for a thrust of the connection straight-bar of ejector pin rotatory, thereby the knee produces a revolving force to people's back and realizes standing up. As can be seen from the figure, the connecting straight rod and the bent rod rotate on arcs with different radiuses. The essence that the connecting rod mechanism can realize the turnover is as follows: the connecting straight rod, the third connecting rod and the dotted line part form a triangle (three vertexes of the triangle are A, B, C respectively). According to triangle knowledge, the sum of the two sides is larger than the third side, when the third connecting rod and the connecting straight rod are on the same straight line, the turning angle is maximum, and the maximum turning angle can be calculated by solving the ratio of the triangle to the side length.

The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention includes equivalent technical means that can be conceived by those skilled in the art based on the inventive concepts.

Claims

1. The utility model provides a four bar linkage of supplementary standing up of controllable angle which characterized in that includes:

a frame body;

2. The four-bar linkage mechanism with controllable angle for assisting turning over as claimed in claim 1, wherein: the transmission device comprises a belt pulley assembly, a worm and gear assembly and a bevel gear assembly, wherein a driven belt pulley of the belt pulley assembly is in belt connection with a driving belt pulley of external driving equipment;

3. The four-bar linkage mechanism for assisting turning over with controllable angle as claimed in claim 2, wherein: the worm is perpendicular with the worm wheel installation axle, and the worm is parallel with the bevel gear installation axle to a worm corresponds two worm wheel installation axles and two bevel gear installation axles.

4. The four-bar linkage mechanism with controllable angle for assisting turning over as claimed in claim 1, wherein: the turnover sub-connecting rod comprises a first connecting rod, a second connecting rod, a third connecting rod, a connecting straight rod and a bent rod, wherein the first connecting rod, the second connecting rod and the third connecting rod are sequentially hinged, the rest end part of the first connecting rod and the rest end part of the third connecting rod are fixedly arranged on different power output ends of the transmission device respectively to form a four-connecting-rod mechanism, the first end of the connecting straight rod is hinged at the hinged part of the second connecting rod and the third connecting rod, the second end of the connecting straight rod is connected with the first end of the bent rod, and the second end of the bent rod extends to a bed board of the nursing bed as a turnover part and is used for being inserted into a gap between the nursing bed and the back of a user to turn over a person lying on the nursing bed.

5. The four-bar linkage mechanism for assisting turning over with controllable angle as claimed in claim 4, wherein: the left end of the first connecting rod and the left end of the third connecting rod are fixedly arranged on two bevel gear mounting shafts which are parallel to each other through T-shaped fixing blocks respectively, and the angle of the four-bar mechanism is adjusted by controlling the rotation angle of the bevel gear mounting shafts.

6. The four-bar linkage mechanism for assisting turning over with controllable angle as claimed in claim 5, wherein: the turning-over part of the bent rod is sunken downwards to form an arc shape matched with the back of a user, and the turning-over part of the bent pipe can be sleeved with a bent rod sleeve to increase the comfort level of the user.

7. The four-bar linkage mechanism for assisting turning over with controllable angle as claimed in claim 5, wherein: the length of the first connecting rod is equal to that of the second connecting rod, the length of the second connecting rod is equal to the distance between the two bevel gear installation shafts, so that a quadrangle formed by the first connecting rod, the second connecting rod and the third connecting rod is a parallelogram, and the first ends of the second connecting rod, the third connecting rod and the connecting straight rod are connected together through the shaft end connecting piece.