Single-power multi-axis linkage electric care bed
[technical field]
The present invention relates to the electric care bed of service robot technical field, specifically, is that the input of a kind of single action power is multi-shaft interlocked, finish synchronously and lift the back of the body, the buttocks that falls, bend one's legs, four functions of step electric care bed.
[background technology]
Nursing bed is a kind of self-care ability that can improve bed old man or patient, alleviates nursing staff's working strength, reduces the service robot of kinsfolk's trouble and worry.Along with improving constantly of people's life-span, aging population is more and more in the society, and is also more and more to the demand of nursing bed.Along with development and social more concerns to old man and bed patient of technology, functional nursing bed is more and more, and they provide all convenience for old man or bed patient's life and treatment.
At present, electric care bed mainly containing related to the present invention: the one, adopt electronic or manual mode to drive the appropriate section motion of bed board by driving-chain, make that human body is in seat, posture such as lie, crouch; The 2nd, adopt servomotor to slow down and increase square rear drive linkage through decelerator, drive the appropriate section motion of bed board, realize the conversion of bed person's position.
But, existing electric care bedly also come with some shortcomings at present:
(1) the chain transmission does not possess auto-lock function, and the bed board of motion can not be in the resting state of locking when motor cuts off the power supply, and this can influence bed person's rest.
(2) chain noise is excessive, and easily slippage phenomenon takes place, thereby influences the safety of nursing bed.
(3) adopt driven by servomotor,, cause electric care bed cost too high, be difficult to promote because the price of servomotor is more expensive.
(4) switching mechanism adopts the linkage of single motor input single shaft output, and a motor only drives a side bed board, and power utilization efficient is not high, and energy-saving effect is relatively poor.
[summary of the invention]
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of single motor input four-axle linked electric care bed, can make bed person oneself operation, finish synchronously and lift the back of the body, the buttocks that falls, bend one's legs, four actions of step (sitting up straight posture normally), it is more reasonable that electric care bed motion is regulated, reliability is higher, but production cost descends, and is more conducive to electric care bed applying.
For achieving the above object, the technical scheme taked of the present invention is:
A kind of single-power multi-axis linkage electric care bed, comprise the combination type bed board that constitutes by back bed board, buttocks bed board, calf plate and sole, the bed board framework, comprise the bedstead that a underframe and bed are put on the shelf, and linear push rod and linkage, be movably hinged with bolt between the framework of back bed board, buttocks bed board, calf plate and sole and the framework---except buttocks bed board and the calf plate, it is characterized in that, the top of frame has chute in bed, the nearly middle shaft hole that has; Described linear push rod, linkage be arranged under the combination type bed board the bed underframe with bed put on the shelf between, linkage comprises: first side link, second side link, the 3rd side link, first connecting rod, second connecting rod, third connecting rod, and relate to a underframe and the bed put on the shelf; The lower end of linear push rod is fixed on the linear push rod mounting rod of a underframe, the upper end of linear push rod is connected with first side link, the lower end of first side link is fixed on the underframe, the upper end of first side link is connected with second side link by first connecting rod, simultaneously, linear push rod is connected with the 3rd side link by second connecting rod, one end of the 3rd side link is put on the shelf with bed by connecting axle and is connected, the other end of the 3rd side link is connected with third connecting rod with bolt, and the other end that third connecting rod connects is welded on the front end of sole;
The promotion of linear push rod makes second side link around the hinged rotation between buttocks bed board and the back bed board, the shaft hole of buttocks bed board on putting on the shelf around bed rotated, by the bracing frame that is arranged under the bed board framework of back the back bed board is lifted, be connected with bolt between the buttocks bed board framework by the back bed board back bed board is raised or set level; Simultaneously, the promotion of linear push rod make the 3rd side link drive connecting axle on putting on the shelf around bed of calf plate and sole, and calf plate framework and sole framework between hinged under turn over, make calf plate vertical, sole forms second horizontal plane under the nursing bed horizontal plane, the Structure Attitude that L-shaped bent lower limb step is sat up straight.
Synchronous interaction is lifted in the rotation of the rotation of described calf plate, sole and back bed board; The rotation amplitude of back bed board is 75 °~85 °, and the rotation amplitude of calf plate is 70 °~80 °.
Described side link is the revolving member that has an end to be connected with bedstead, comprises first side link, second side link and the 3rd side link.
Described linear push rod is the power source of linkage, is made up of 24V voltage motor, worm and worm gear and trapezoidal screw mechanism; When linear push rod moved to extreme position in the other direction, back bed board, calf plate and sole and whole electric care bed horizontal plane were consistent.
The electric care bed good effect of single-power multi-axis linkage of the present invention is:
(1) replace servomotor with linear push rod, used plane hinge mechanism, and drive mechanism, frame, bed board framework etc. all adopt metal material and composite manufacturing, hinged selection standard spare screw bolt and nut.
(2) one cover link gears adopt an output of a linear push rod and coupling power supply, have realized the function of single action power three outputs, have saved electric device.
(3) realized electric care bedly lifting the back of the body, the buttocks that falls synchronously, bent one's legs, the action of step, it is more reasonable that motion is regulated, and situation about gliding when having avoided bed person to sit up straight, and makes the bed person can free conversion between prone position and (bent lower limb step) sitting posture.
(4) convenient for production, easy to use, cost is lower, helps electric care bed promoting the use of, and helps patient's healthy rehabilitation.
[description of drawings]
Accompanying drawing 1 is the structural representation of combination type bed board;
Accompanying drawing 2 is the electric care bed side-looking structural representation of single-power multi-axis linkage of the present invention;
Accompanying drawing 3 is the electric care bed structural representation of single-power multi-axis linkage of the present invention;
The structural representation that accompanying drawing 4 is put on the shelf for bed;
Accompanying drawing 5 is the structural representation of linear push rod and linkage;
Accompanying drawing 6 is the structural representation of first side link;
Accompanying drawing 7 is the structural representation of second side link and bracing frame;
Accompanying drawing 8 is the structural representation of second connecting rod;
Accompanying drawing 9 is the structural representation of the 3rd side link;
Accompanying drawing 10 is the structural representation of calf plate;
Accompanying drawing 11 is the structural representation of third connecting rod and sole.
Label in the accompanying drawing is respectively:
1, back bed board, 2, the buttocks bed board, 3, calf plate,
4, sole, 5, first side link, 6, first connecting rod,
7, second side link, 8, second connecting rod, 9, linear push rod,
10, the 3rd side link, 11, linear push rod mounting rod, 12, axle,
13, the first side link mounting rod, 14, the bed underframe, 15, the bed put on the shelf,
16, chute, 17, shaft hole, 18, third connecting rod,
19, connecting axle.
[specific embodiment]
Provide the electric care bed specific embodiment of single-power multi-axis linkage of the present invention below in conjunction with accompanying drawing.
Referring to accompanying drawing 1.The electric care bed bed board of single-power multi-axis linkage of the present invention is the combination type bed board, comprise back bed board 1, buttocks bed board 2, calf plate 3 and sole 4, they all are to be shelved on the metal framework of each several part, promptly, constitute metal bed board framework by back bed board framework, buttocks bed board framework, thigh plate framework and calf plate framework, be movably hinged with the bolt standard component between each several part framework and the framework---except buttocks bed board and the thigh plate; Back bed board 1, buttocks bed board 2, calf plate 3 and in sole 4 is shelved on relevant metal framework owing to be active between framework and the framework, therefore, also are active between back bed board 1, buttocks bed board 2, calf plate 3 and the sole 4.The top of frame has chute 16 in bed, the nearly middle shaft hole 17 that has; Buttocks bed board 2 can move in chute 16 and rotate, and prevents that bed person from sitting up straight slippage forward in the process.
Referring to accompanying drawing 2,3 and 5.Under the combination type bed board, bed underframe 14 is provided with linear push rod 9 and linkage with bed putting on the shelf between 15, linkage is the metallic rod serial verb construction, comprise first side link 5, second side link 7, the 3rd side link 10 (described side link is the link component that has an end to be connected with bedstead), first connecting rod 6, second connecting rod 8, third connecting rod 18, and relate to a underframe 14 and bed puts 15 on the shelf.Linear push rod 9 is the power source of linkage, constitute by 24V voltage motor, worm and worm gear and trapezoidal screw mechanism, drive back bed board 1, calf plate 3 and sole 4 motions by linkage, sit up straight the bent lower limb step of buttocks link gear linear reciprocating power is provided for of the present invention; During energising, linear push rod 9 promotes linkage and rotates, and during outage, linear push rod 9 stops, and each connecting rod of the linkage that is driven does not have relative motion, all remains static.
The lower end of linear push rod 9 is fixed on the linear push rod mounting rod 11 of a underframe 14, the upper end of linear push rod 9 is connected with first side link 5, the lower end of first side link 5 and bed underframe 14 are by bolted splice, its upper end is connected (second side link 7 is connected with buttocks bed board 2) by first connecting rod 6 with second side link 7, simultaneously, linear push rod 9 (comprising first side link 5) is connected with the 3rd side link 10 by second connecting rod 8, one end of the 3rd side link 10 is put on the shelf by connecting axle 19 and bed and 15 is connected, the other end of the 3rd side link 10 is connected with third connecting rod 18 with bolt, and the other end of third connecting rod 18 is welded on the front end of sole 4.
The shaft hole 17 that the promotion of linear push rod 9 makes second side link 7 put on the shelf on 15 around bed rotates, and drive buttocks bed board 2 and move and slide along chute 16, support frame structure is arranged on the back bed board 1 time, it lifts back bed board 1 under the promotion of linkage, be connected (rotating shaft) by back bed board 1 and bolt between buttocks bed board 2 frameworks back bed board is raised and set level, realize bed person's sitting posture.
Meanwhile, the promotion of linear push rod 9 makes the 3rd side link 10 drive calf plates 3 and sole 4 around bed put on the shelf connecting axle 19 on 15 and the synchronous upset of hinged generation between thigh plate framework and the calf plate framework: calf plate 3 and sole 4 are put on the shelf around bed and are turned under 15 the afterframe (rotating shaft), turn under calf plate 3 is vertical, second horizontal plane that sole 4 forms under the nursing bed horizontal plane, state is sat up straight in L-shaped bent lower limb step, bed person can be hung down the lower limb natural torsion when sitting up, form a complete attitude of sitting up straight.
Because the effect of planar linkage mechanism, lifting of the upset of calf plate 3 and sole 4 and back bed board 1 is synchronous interlock, and the rotation amplitude of back bed board 1 can reach 75 °~85 °; The rotation amplitude of thigh plate 3 can reach 70 °~80 °, because buttocks bed board 2 moves in chute 16 and slides, so buttocks bed board 2 front sides are sagging slightly, can prevent bed person's oriented preceding slippage trend in the process of sitting up straight.
When described linear push rod 9 is worked, have degree of freedom, realize lifting the plane mechanism that the back of the body sits up straight the bent lower limb step of buttocks function with one of interlinked mechanism formation; During outage, linear push rod 9 constitutes the plane truss of the zero degree of freedom of no relative motion between connector, makes planar linkage mechanism be in steady statue; When linear push rod 9 moved to extreme position in the other direction, back bed board 1, calf plate 3 and sole 4 were consistent by planar linkage mechanism and whole electric care bed level, the electric care bed state of lying that is in.
Accompanying drawing 4,6 to 11 is the structural representation of associated components of the present invention, wherein:
The bed of accompanying drawing 4 puts 15 on the shelf for metal rack, has chute 16 on the top, has shaft hole 17 in the middle of near;
The two ends of first side link 5 of accompanying drawing 6 are circular arc, are provided with through hole in the middle of the circular arc;
Second side link, 7 supports triangular in shape of accompanying drawing 7 are arranged on below the hinge of buttocks bed board 2 front ends;
Accompanying drawing 8 is the second connecting rod 8 of long metal strip, and its two ends are circular arc, is provided with through hole in the middle of the circular arc;
The 3rd side link 10 of accompanying drawing 9 is the triangle knife-edge, has through hole at point of a knife, heel, pommel;
Accompanying drawing 10 is the structural representation of thigh plate 3;
Accompanying drawing 11 is the structural representation of calf plate 4, is welded with third connecting rod 18 below its link, and the other end of third connecting rod 18 is a circular arc, is provided with through hole in the middle of the circular arc.
Bedstead among the present invention, bed board framework, linkage all adopt metal material and/or composite manufacturing; the hinged standard component of selecting screw bolt and nut for use; therefore; the production of parts and purchase are relatively easy; make the present invention easily manufactured; cost is control easily also, and these all help the popularization and the large-scale production of product of the present invention.