CN109223360B - Medical nursing sickbed capable of being lifted in linkage manner and inclining in multiple directions - Google Patents

Abstract

The invention provides a structure capable of realizing lifting, left-right inclination, left-right movement and lateral inclination of a sickbed in a linkage manner, each part can be matched and arranged according to a certain time sequence and can be independently driven, and in order to realize the reliability of the position adjustment of the sickbed, the sickbed is driven by a cam mechanism which has higher mechanical stability and stronger interference resistance compared with pure electric control. The linkage of each position adjusting module of the sickbed is realized through the arrangement of the contour line of the cam chart and the time sequence matching of each cam. In a first aspect of the invention, a medical care bed is essentially composed of five parts: the bed comprises a base, a first driving mechanism arranged on the base, a middle seat arranged above the first driving mechanism, a second driving mechanism arranged on the middle seat, and a tiltable bed board driven by the second driving mechanism.

Description

A kind of medical nursing bed with linkage lifting and multi-direction inclination

technical field

The invention relates to a medical nursing bed, in particular to a medical nursing bed with linkage lifting and inclining in multiple directions.

Background technique

In the prior art, Publication No. CN201263760U discloses a hospital bed that uses a deformable tripod to realize the overall lifting and front-to-rear inclination of the bed, which mainly includes a bottom frame, a lifting shaft, a lifting tripod rotating arm, a tilting tripod support rod, and a tilting tripod. , Bed tilt shaft, bed, chute, lift push rod, tilt push rod. It is characterized in that the overall lifting and front and rear inclination of the bed can be realized by an independent mechanism. Push the lifting push rod, and the lifting tripod drives the bed to achieve overall rise or fall; push the tilt push rod, and the tilting tripod drives the bed to tilt forward or backward. This invention changes the existing method of supporting the bed with two cantilevers. The structure overcomes the fact that the two cantilevers rise or fall together to drive the bed to rise or fall, or use the height difference between the two cantilevers to realize the front and rear inclination of the bed, which provides technical structural support for the development of multi-functional hospital beds;

The invention with publication number CN205612655A discloses a medical bed and its lifting and tilting mechanism, which comprises a base (10), a first lifting mechanism (20) and a second lifting mechanism (30). The first lifting mechanism has a first support end (22) positioned on the base, and a first drive end (24) capable of linear motion relative to the first support end, and the first drive end can be driven by a first drive end. A hinge shaft is hinged to the bed body (80). The second lift mechanism has a second support end (32) positioned on the base, and a second drive end (34) capable of linear motion relative to the second support end, the second drive end being capable of being connected by a second hinge The shaft is hinged to the bed body and can slide relative to the bed body, the second hinge shaft (342) is parallel to the first hinge shaft (242), and the sliding direction of the bed body relative to the second driving end is perpendicular to the second hinge shaft;

The structures of the above two inventions have inaccurate control accuracy, cannot be tilted laterally, and have no linkage function between various parts, and cannot efficiently adjust the patient's position on the hospital bed.

For the setting of lateral inclination, the publication number CN2838584Y is an electric patient transfer vehicle, which is mainly connected with an electric lifting mechanism on the walking frame. The lifting frame of the mechanism is connected with an electric translation mechanism and an electric rollover mechanism, both of which are connected with the vehicle surface. This kind of patient transfer car can be lifted, translated and rolled over electrically, so that the car surface can be lifted and lowered arbitrarily at a height between 500-900mm and rolled over at any angle between 1-30°. The rollover structure is controlled by an electric push rod, and its support plate is a cantilever structure, which has poor force and stability, cannot stably control the patient's rollover, and cannot well cooperate with the lifting module to adjust the patient's position.

Therefore, a structure that can be linked to realize the lifting, left and right inclination, left and right movement, and lateral inclination of the hospital bed is proposed, and each part can also be independently driven and set according to a certain time sequence, and in order to achieve the reliability of the bed position adjustment, Compared with pure electric control, the cam mechanism is used to drive the position of the hospital bed, which is more mechanically stable and has stronger anti-interference ability. Through the setting of the contour line of the cam diagram and the timing coordination of each cam, the linkage of each position adjustment module of the hospital bed is realized.

SUMMARY OF THE INVENTION

The subject of the present invention is to propose a structure that can realize the lifting, left and right inclination, left and right movement, and lateral inclination of the hospital bed in linkage, and each part can also be independently driven and installed according to a certain time sequence. Reliability. Compared with pure electric control, the cam mechanism is used to drive the position of the hospital bed, which is more mechanically stable and has stronger anti-interference ability. Through the setting of the contour line of the cam diagram and the timing coordination of each cam, the linkage of each position adjustment module of the hospital bed is realized.

In the first aspect of the present invention, the medical nursing bed is mainly composed of five parts: a base 1, a first drive mechanism installed on the base, an intermediate seat 11 installed above the first drive mechanism, and a base installed on the intermediate base 11. A second driving mechanism, and a tiltable bed board A driven by the second driving mechanism.

The first driving mechanism drives the middle seat 11 to drive the up-and-down, left-right inclination, and left-right movement of the bed board A. The second driving mechanism realizes the front and rear inclination of the bed board A.

In the second aspect of the present invention, the base 1 is provided with a transverse wall plate 2 for fixedly supporting the first drive mechanism, the transverse wall plate 2 is installed with two parallel rotating shafts, and two first cams are respectively installed on the two rotating shafts 21. Two second cams 22, two first cams 21 are provided on the same axis, two second cams 22 are also provided on the same axis, and the first motor 3 drives the rotating shaft to drive the two first cams 21 Rotation, the second motor 4 drives the shaft to drive the two second cams 22 to rotate, the base 1 is also installed with four lifting rod fixing seats 5, there are four lifting rod fixing seats 5, and the lifting rod 10 is hinged on the lifting rod. 10 is set to 4, the lifting rod fixing bases 5 are distributed on the four corners of the base 1, forming four intersection points of the rectangle, the lifting rod 10 on the left and the lifting rod 10 on the right The side lift rod 10 interferes with the right lift rod 10, and the thickness of a part of the lift rod 10 is thinned to form a thin part 7, see FIG. 3, and the thinned part of the left lift rod 10 is The thinned parts of the lift rod 10 are arranged facing each other so as to form mutual dislocation and form a structure capable of relative movement. The first driving mechanism includes the lift rod fixing seat 5, the lift rod 10, and the first cam mechanism.

The lifting and left-right inclination of the bed board A is realized through the synchronous rotation of the first and second cams and the independent rotation.

In the third aspect of the present invention, the two first cams 21 are mounted on the rotating shaft driven by the motor, and the cam profile surface cooperates with the roller 33 mounted on the left cam follower rod 32, and the left cam is driven by the rotation of the cams The swing of the moving rod 32, wherein the left cam follower rod 32 is hinged on the lifting rod 10, and the left cam follower rod 32 and the lifting rod 10 are connected by a compression spring 9 with a large elastic coefficient, so that the left cam The driven rod 32 oscillates relatively little with respect to the lift rod 10 , which acts as a shock absorber and prevents the wear of the cam. Similarly, on the right side, the cam follower rod 32 on the right side is hinged on the lift rod 10, and the cam follower rod 32 on the right side and the lift rod 10 are also connected by a compression spring 9 with a larger elastic coefficient, so that the right side The cam follower rod 32 swings relatively little relative to the lift rod 10, which acts as a shock absorber and prevents the wear of the cam. In addition, dampers 8 are respectively provided between the left and right lift rods 10 and the base 1. The dampers 8 can bear the pressure of a part of the hospital bed and can reduce the pressure on the cam surface. The damping coefficient of the damper 8 is set so that The rollers 33 do not disengage from the cam and allow moderate pressure on the cam surface.

In order to prevent the cam mechanism from being stuck due to the high pressure on the cam surface, a damper 8 is provided to bear a part of the weight of the middle seat and the bed board A, and a compression spring 9 with a high rigidity coefficient is provided to prevent the roller 33 from colliding with the cam surface. Rigid shock.

According to the fourth aspect of the present invention, when the first cam and the second cam work within the range of the cam lift, when the left-right position needs to be tilted, the first cam 21 on one side stops rotating, and the first cam 21 on the other side stops rotating. The two cams 22 continue to rotate, thereby driving the right lift rod 10 to swing. The swing of the right lift rod 10 drives the left support shaft 15 to slide in the through groove, thereby driving the left middle seat 11 to be lifted. When the telescopic rod of the driving cylinder 14 on the left moves with it, the telescopic rod of the driving cylinder 17 on the right is fixed, thus realizing the clockwise inclination of the bed board.

In the same way, the second cam 22 on one side is kept from rotating, and the first cam 21 on the other side continues to rotate, thereby driving the lifting rod 10 on the left to swing, and the swing of the lifting rod 10 on the left drives the right support shaft 16 The sliding in the through groove drives the middle seat 11 on the right side to be lifted. At this time, the telescopic rod of the driving cylinder 17 on the right side moves with it, and the telescopic rod of the driving cylinder 14 on the left side is fixed, thus realizing the inversion of the bed board. The hour hand is tilted.

When the left and right position translation needs to be realized, the first and second cams are stopped from rotating, and the left and right movement of the middle seat 11 is realized by the coordinated movement of the telescopic rods of the driving cylinders 14 and 17. When it needs to move to the left, the telescopic rods of the driving cylinder 14 are extended. , the telescopic rod of the driving cylinder 17 is shortened; when it needs to move to the right, the telescopic rod of the driving cylinder 14 is shortened, and the telescopic rod of the driving cylinder 17 is extended.

Through the asynchronous rotation of the cams, the left and right inclination of the bed board is realized, and the left and right movement of the middle seat and the bed board is realized by driving the cylinders 14 and 17 .

In the fifth aspect of the present invention, during operation, the front rotating shaft 19 and the rear rotating shaft 24 rotate synchronously. When rotating clockwise, the third cam 18 is lifted and the fourth cam 23 is lowered, so as to drive the bed board A to look closer. One end of the side is lifted up and lowered away from the observation side. When turning counterclockwise, the third cam 18 is lowered and the fourth cam 23 is lifted, thereby driving the end of the bed plate A close to the observation side to lower and lift away from the observation side, and finally To achieve, the lateral inclination of the bed board A.

The inclination of the front and rear positions of the bed board is realized by the lift and drop of two different cams that rotate synchronously.

Description of drawings

FIG. 1 is an explanatory diagram of the overall structure of the medical nursing bed of the present invention.

FIG. 2 is an explanatory diagram of a laterally inclined structure of a medical nursing bed.

FIG. 3 is an explanatory diagram of the lifting structure, the front-rear inclination structure, and the front-rear movement structure of the medical nursing bed.

FIG. 4 is an explanatory diagram of a cam mechanism of a lateral inclination structure of a medical nursing bed.

FIG. 5 is an explanatory diagram of a cam drive mechanism of a lifting structure of a medical nursing bed.

Detailed ways

Hereinafter, the present invention will be described in detail based on the preferred embodiments shown in the drawings.

Fig. 1 is the overall structure of the medical nursing bed of the present invention, which is mainly composed of five parts: a base 1, a first drive mechanism installed on the base, an intermediate seat 11 installed above the first drive mechanism, and a The second driving mechanism on the middle seat 11, and the tiltable bed board A driven by the second driving mechanism.

There are rollers installed under the base 1 to facilitate the movement of the hospital bed. The base 1 is provided with a transverse wall plate 2 for fixedly supporting the first drive mechanism. The transverse wall plate 2 is installed with two parallelly arranged rotating shafts, and two first cams 21 and two second cams are respectively installed on the two rotating shafts. 22. There are two first cams 21 on the same shaft, and two second cams 22 on the same shaft, and the first motor 3 drives the shaft to drive the two first cams 21 to rotate, and the second motor 4 drives The rotating shaft drives the two second cams 22 to rotate, and four lifting rod fixing seats 5 are also installed on the base 1. There are four lifting rod fixing seats 5, and lifting rods 10 are hinged on them. The rod fixing bases 5 are distributed on the four corners of the base 1, forming four intersection points of the rectangle. The side lift rod 10 interferes, and the thickness of a part of the lift rod 10 is thinned to form a thin part 7, see FIG. 3, and the thinned part of the left lift rod 10 and the right lift rod 10 are The first driving mechanism includes the lifting rod fixing seat 5, the lifting rod 10, and the first cam mechanism.

5, the structure of the first cam mechanism is described in detail. The two first cams 21 are installed on the rotating shaft driven by the motor. to drive the swing of the left cam follower rod 32, wherein the left cam follower rod 32 is hinged on the lift rod 10, and a compression spring 9 with a large elastic coefficient passes between the left side cam follower rod 32 and the lift rod 10 The connection makes the left cam follower rod 32 swing relatively small relative to the lift rod 10, which plays a role of shock absorption and prevents the wear of the cam. Similarly, on the right side, the cam follower rod 32 on the right side is hinged on the lift rod 10, and the cam follower rod 32 on the right side and the lift rod 10 are also connected by a compression spring 9 with a larger elastic coefficient, so that the right side The cam follower rod 32 swings relatively little relative to the lift rod 10, which acts as a shock absorber and prevents the wear of the cam. In addition, dampers 8 are respectively provided between the left and right lift rods 10 and the base 1. The dampers 8 can bear the pressure of a part of the hospital bed and can reduce the pressure on the cam surface. The damping coefficient of the damper 8 is set so that The rollers 33 do not disengage from the cam and allow moderate pressure on the cam surface.

Continuing to describe the second driving mechanism in detail with reference to FIG. 1 , the middle seat 11 is a shell-like structure, and its front and rear sides are provided with through grooves. The through grooves are provided with a left support shaft 15 and a right support shaft 16 , and the left support shaft 15 and the right support shaft. 16 can slide in the through groove, the axis directions of the left support shaft 15 and the right support shaft 16 are perpendicular to the front and rear sides, and two driving cylinders 14 and 17 are respectively provided in the front and rear through grooves respectively opened on the front and rear sides, and the left driving cylinder 14 One end is set at the left end of the through slot, one end of the right drive cylinder 17 is set at the right end of the through slot, the other end of the left drive cylinder 14 is connected with the left support shaft 15, and the other end of the right drive cylinder 17 is connected with the right support shaft 16, for further reference 3, the left support shaft 15 passes through the circular through hole of the upper end of the lifting rod 10 arranged in parallel on the left side, the left support shaft 15 is horizontally supported, and its axis is distributed before and after, similarly, the right support shaft 16 The right support shaft 16 is horizontally supported through the circular through hole in the upper end of the lift rod 10 arranged in parallel in the front and rear on the right side, and its axis is distributed in the front and rear.

In the case of the above arrangement, the first cam mechanism drives the lifting rod 10 to swing around the lifting rod fixing seat 5, the crossed lifting rod 10 drives the middle seat 11 to rise and fall and can realize left and right inclination, when the first cam 21 and the second cam 22 When rotating synchronously, the lifting rod 10 swings synchronously, thereby driving the bed board A to rise and fall vertically. During the vertical lifting and lowering of the bed board A, the left support shaft 15 and the right support shaft 16 slide in the through groove. Moving left and right, the two driving cylinders 14 and 17 are linked with the left support shaft 15 and the right support shaft 16, and the control device ensures that the lengths of the lifting and retracting rods of the two driving cylinders are equal.

When the operation of the first cam and the second cam is within the cam lift range,

When the left and right position is required to be tilted, the first cam 21 on one side stops rotating, and the second cam 22 on the other side continues to rotate, thereby driving the right lift rod 10 to swing, which is driven by the swing of the right lift rod 10 The left support shaft 15 slides in the through groove, thereby driving the left middle seat 11 to be lifted, at this time, the telescopic rod of the left driving cylinder 14 follows, and the right driving cylinder 17 telescopic rod is fixed, so The clockwise inclination of the bed board is realized.

In the same way, the second cam 22 on one side is kept from rotating, and the first cam 21 on the other side continues to rotate, thereby driving the lifting rod 10 on the left to swing, and the swing of the lifting rod 10 on the left drives the right support shaft 16 The sliding in the through groove drives the middle seat 11 on the right side to be lifted. At this time, the telescopic rod of the driving cylinder 17 on the right side moves with it, and the telescopic rod of the driving cylinder 14 on the left side is fixed, thus realizing the inversion of the bed board. The hour hand is tilted.

When the left and right position translation needs to be realized, the first and second cams are stopped from rotating, and the left and right movement of the middle seat 11 is realized by the coordinated movement of the telescopic rods of the driving cylinders 14 and 17. When it needs to move to the left, the telescopic rods of the driving cylinder 14 are extended. , the telescopic rod of the driving cylinder 17 is shortened; when it needs to move to the right, the telescopic rod of the driving cylinder 14 is shortened, and the telescopic rod of the driving cylinder 17 is extended.

Referring to Figures 2 and 4, the front and rear inclination drive structure of the bed board A is described in detail. The left and right ends of the middle seat 11 are provided with supporting wall panels for rotating and installing the front rotating shaft 19 and the rear rotating shaft 24. The front rotating shaft 19 and the rear rotating shaft 24 can be installed on the supporting wall. Plates 25, 26, 27, the front rotating shaft 19 is driven by the third motor 12, the rear rotating shaft 24 is driven by the fourth motor 13, the intermediate positions of the front rotating shaft 19 and the rear rotating shaft 24 are respectively provided with a third cam 18, a fourth cam 23, The lift and drop of the third cam 18 and the fourth cam 23 are opposite. Referring to FIG. 4 , the bed board A is rotated and arranged on the middle seat 11 through the bed board rotating shaft 30. The cross section of the bed board A is an inverted isosceles trapezoid. Arc-shaped protrusions 28 and 29 are respectively provided on the waist planes on both sides. The arc-shaped protrusions 28 cooperate with the third cam 18, and the arc-shaped protrusions 29 cooperate with the fourth cam 23. In order to prevent interference, the middle seat 11 On the upper surface of the cam, a long through groove is provided at the position corresponding to the third and fourth cams, and the long through groove is used for accommodating the third and fourth cams.

During operation, the front rotating shaft 19 and the rear rotating shaft 24 rotate synchronously. When rotating clockwise, the third cam 18 is lifted and the fourth cam 23 is lowered, thereby driving the end of the bed plate A close to the observation side to lift, away from the observation side. When turning counterclockwise, the third cam 18 is lowered and the fourth cam 23 is lifted, thereby driving the end of the bed plate A close to the observation side to lower, and lift away from the observation side, and finally realize that the lateral direction of the bed plate A tilt.

The following is a method of using the medical nursing bed based on the above. The first cam 21 and the second cam 22 are rotated synchronously, and the telescopic rods of the driving cylinders 14 and 17 are driven to extend synchronously, so that the bed board A rises vertically, and the first cam remains stationary, The second cam 22 continues to rotate, driving the lifting rod 10 to rotate clockwise, the telescopic rod of the driving cylinder 14 continues to extend, the length of the telescopic rod of the driving cylinder 17 remains unchanged, the left side of the middle seat is lifted, and the side of the bed board A is lifted, The third motor 12 and the fourth motor 13 are rotated synchronously clockwise, the third cam 18 is lifted, the fourth cam 23 is lowered, and the bed board A is inclined in the direction away from the observer.

The following is how to restore the medical nursing bed to its original state. The third motor 12 and the fourth motor 13 are rotated counterclockwise synchronously. 22 reversely rotates, driving the lifting rod 10 to rotate counterclockwise, driving the cylinder 14 to retract the telescopic rod, the middle seat returns to the horizontal state, the first cam 21 and the second cam 22 rotate in the opposite direction synchronously, and the driving cylinder 14, 17 The telescopic rod shrinks synchronously, Make the bed board A fall vertically.

Claims (8)

1. A medical nursing bed with linkage lifting and inclining in multiple directions, mainly comprising: a base (1), a first drive mechanism installed on the base, a middle seat (11) installed above the first drive mechanism, and a middle seat (11) installed in the middle The second driving mechanism on the seat (11) and the tiltable bed plate (A) driven by the second driving mechanism are characterized in that: the first driving mechanism and the second driving mechanism are cam mechanisms, and the cam mechanism drives and is hinged on the base The two groups of lifting rods (10) distributed on the upper part move, one end of each group of lifting rods is installed with a rotating shaft, and the rotating shaft is slidably connected to the middle seat (11), and the middle seat (11) is provided with two groups of cylinders, one of which is a cylinder. One end is fixed on the middle seat (11), the other end is fixed on the rotating shaft on one side, one end of the other group of cylinders is fixed on the middle seat (11), the other end is fixed on the rotating shaft on the other side, and the bed plate (A) is installed Above the middle seat (11), the bed plate (A) is driven by a pair of cam mechanisms, and a transverse wall plate (2) for fixedly supporting the first driving mechanism is installed on the base (1). The plate (2) is mounted with two parallel-arranged rotating shafts, two first cams (21) and two second cams (22) are respectively mounted on the two rotating shafts, and the first cams (21) are on the same shaft Two second cams (22) are provided on the same shaft, the first motor (3) drives the rotating shaft to drive the two first cams (21) to rotate, and the second motor (4) drives the rotating shaft to drive the two first cams (21) to rotate. A second cam (22) rotates. 2. The medical nursing bed with linkage lifting and inclining in multiple directions according to claim 1, four lifting rod fixing seats (5) are also installed on the base (1), on which the lifting rods (5) are hinged. 10), the lifting rods (10) are set to 4. 3. A kind of medical nursing bed with linkage lifting and multi-directional inclination according to claim 2, the lifting rod fixing seat (5) is distributed on the four corners of the base (1), forming four intersection points of the rectangle, located on the left side The lifting rod (10) is arranged crosswise with the lifting rod (10) on the right, and in order to prevent the left lifting rod (10) from interfering with the right lifting rod (10), a part of the lifting rod (10) The thickness is thinned to form a thinned portion (7). 4. The medical nursing bed with linkage lifting and multi-directional inclination according to claim 3, wherein the thinned part of the lifting rod (10) on the left side and the thinning part of the lifting rod (10) on the right side are arranged facing each other, In order to form mutual dislocation and form a structure capable of relative movement. 5. The medical nursing bed with linkage lift and multi-directional inclination according to claim 4, further comprising a roller (33), the two first cams (21) are mounted on the rotating shaft driven by the motor, and the cam contour surface Cooperate with the roller (33) installed on the left cam follower rod (32), wherein the left side cam follower rod (32) is hinged on the lift rod (10), and the left side cam follower rod (32) is hinged on the lift rod (10). (32) is connected with the lifting rod (10) through a compression spring (9) with a larger elastic coefficient. 6. The medical nursing bed with linkage lifting and inclining in multiple directions according to claim 5, wherein the cam follower rod (32) on the right side is hinged on the lift rod (10), and the cam follower rod (32) on the right side is hinged on the lift rod (10). ) and the lifting rod (10) are also connected by a compression spring (9) with a larger elastic coefficient, and dampers (8) are respectively provided between the lifting rod (10) on the left and the right side and the base (1). , the damper (8) can bear the pressure of a part of the bed, can reduce the pressure on the cam surface, set the damping coefficient of the damper (8) so that the roller (33) does not leave the cam, and make the cam surface bear moderate pressure. 7. A method of using a medical nursing bed, the medical nursing bed adopts the medical nursing bed with a multi-directional inclination of linkage lifting and lowering according to any one of claims 1-6, and the steps are as follows, 1) The first cam (21) and the second cam (22) rotate synchronously to drive the cylinders (14) and (17) telescopic rods to extend synchronously, so that the bed board (A) rises vertically; 2) The first cam remains stationary, the second cam (22) continues to rotate, driving the lift rod (10) to rotate clockwise, the telescopic rod of the driving cylinder (14) continues to extend, and the length of the telescopic rod of the driving cylinder (17) remains unchanged , the left side of the middle seat is lifted, and the side of the bed board (A) is lifted; 3) Rotate the third motor (12) and the fourth motor (13) synchronously clockwise, the third cam (18) is the lift, the fourth cam (23) is the lower, and the bed board (A) is tilted away from the observer . 8. the using method of a kind of medical nursing bed according to claim 7, its step also comprises: 4) Synchronously rotate the third motor (12) and the fourth motor (13) counterclockwise, the third cam (18) is a descending stroke, the fourth cam (23) is a lifting stroke, and the bed plate (A) is restored to a horizontal state; 5) The second cam (22) rotates in the reverse direction, driving the lifting rod (10) to rotate counterclockwise, driving the cylinder (14) telescopic rod to shrink, and the middle seat returns to a horizontal state; 6) The first cam (21) and the second cam (22) rotate in the opposite direction synchronously, and the telescopic rods of the driving cylinders (14, 17) are synchronously retracted, so that the bed board (A) vertically descends.

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