Utility model content
The purpose of this utility model is to be provided for scanning bed electrical-controlled lifting device, electric lifting mechanism clear in structure, and processing technique is simple, saves cost, can accomplish accurately, stably complete scanning bed lifting moving location action.In addition, automatic hoisting mechanism has Stroke Control double protection functions, can realize respectively the duplicate protection to lifting travel extreme position, has improved the reliability of the scanning bed elevating control of MRI.
In order to reach above-mentioned purpose, this utility model has adopted following technical scheme, for scanning bed electrical-controlled lifting device, comprise gripper shoe, base, elevating mechanism, on described base, be provided with the elevating mechanism for lifting gripper shoe, described elevating mechanism comprises hinge means, carriage, make hinge means realize the driving mechanism of lifting action, described hinge means comprises outside lever and interior fork, above-mentioned two forks join by hinge axis in centre, described carriage comprises carriage and lower slider device, described outside lever lower end is hinged on base by bearing block, outside lever upper end is connected with gripper shoe slidingtype by upper carriage, described interior fork upper end is hinged by bearing block and gripper shoe, interior fork lower end is connected with base sliding formula by lower slider device, described driving mechanism lower end is hinged on base, upper end is hinged on the middle horizontal fork bracing frame of outside lever.
Described upper carriage comprises the corresponding upper rail being used in conjunction with and upper rail slide block, and described upper rail is fixedly connected with gripper shoe lower surface, and described upper rail slide block is arranged on the upper end that is hinged on outside lever; Described lower slider device comprises the corresponding lower guideway being used in conjunction with and lower guideway slide block, and described lower guideway is fixedly connected with base upper surface, and described lower guideway slide block is hinged on the lower end of interior fork.
Described outside lever and interior fork are rectangular frame structure, and horizontal connecting rod separately, and described interior fork lower end is connected with lower carriage, is provided with accordingly the limited block that then limits whole hinge means oscillating stroke for limiting lower carriage on described base; Described outside lever upper end is also connected with upper bracket, and described upper rail slide block is hinged on outside lever upper end by upper bracket.
Described driving mechanism is linear-motion actuator.
Described base wherein one end is also provided with lifting travel controller, encoder lifting travel controller cooperating corresponding with encoder is set on the connecting axle of outside lever lower end and completes lifting travel control.
Described lower slider device rear end is provided with stroke duplicate protection mechanism.
Described stroke double protecting device comprises contact and the switch that corresponding matching is used mutually up and down, and described switch is arranged on base, and described contact is arranged on switching support one end, on the lower carriage that in the switching support other end connects, fork bottom arranges.
The quantity of described switch setting is at least two covers, and described switch comprises folded limit switch and utmost point guarantor switch by arranging mutually.
Working position switch is also set on described base, and working position switch line position is switching support back-end location in described contact opposite side.
Compared to prior art, the utlity model has following beneficial effect:
The scanning bed lifting moving function of MRI that this utility model is perfect.Reduce patient scanning bed up and down voluntarily smoothly, needed family numbers of patients to be placed in radiation chamber and coordinate mobile and suffer the danger of radiation, saved manpower, embodied humanistic care, improved the detection efficiency of MRI.In addition, the design applicability of the scanning bed electrical-controlled lifting of MRI mechanism hinge means is strong, has improved lifting action stability, and has reduced scanning bed manufacturing cost.Journey controller is novel in design, can realize the real-time Presentation Function to lifting travel distance.The duplicate protection tissue of extreme position has increased the reliability of system.In addition, this utility model technological process is succinct, easily manufactured, applied widely.
Described carriage combines with hinge means, realizes scanning bed elevation and subsidence mechanical motion.The fork bracing frame that linear-motion actuator promotes in hinge means is realized scanning bed electrical-controlled lifting action.Journey controller can show scanning bed lifting distance.Lower position block has determined scanning bed rising mechanical position limitation position.Operating position switch has determined scanning bed operating position, and mutually locks with scanning bed horizontal feed motion, has guaranteed the reliability of system motion.Scanning bed up and down voluntarily for convenience of patient, native system can be by the scanning bed limit inferior position that drops to, and being scanned sufferer can be in the situation that need not helping, move to easily MRI scanning bed on.
The specific embodiment
Relevant detailed description of the present utility model and technology contents, coordinate accompanying drawing to be described as follows, yet accompanying drawing only provides the use of reference with explanation, is not used for this utility model to be limited.
Shown in Fig. 1-2, for scanning bed electrical-controlled lifting device, comprise gripper shoe 1, base 9, elevating mechanism, on described base, be provided with the elevating mechanism for lifting gripper shoe, described elevating mechanism comprises hinge means, carriage, make hinge means realize the driving mechanism of lifting action, described hinge means comprises outside lever 7 and interior fork 5, above-mentioned two forks join by hinge axis 6 in centre, described carriage comprises carriage and lower slider device, described outside lever lower end is hinged on base by bearing block 10, outside lever upper end is connected with gripper shoe slidingtype by upper carriage, described interior fork upper end is hinged by bearing block 3 and gripper shoe, interior fork lower end is connected with base sliding formula by lower slider device, described driving mechanism lower end is hinged on base, upper end is hinged on the middle horizontal fork bracing frame 2 of outside lever.Described upper carriage comprises the corresponding upper rail being used in conjunction with 19 and upper rail slide block 18, and described upper rail is fixedly connected with gripper shoe lower surface, and described upper rail slide block is arranged on the upper end that is hinged on outside lever; Described lower slider device comprises the corresponding lower guideway being used in conjunction with 15 and lower guideway slide block 13, and described lower guideway is fixedly connected with base upper surface, and described lower guideway slide block is hinged on the lower end of interior fork.Two bearing blocks that are fixed under gripper shoe are vertical corresponding one by one with two bearing blocks that are fixed on base, and two groups of carriages that are fixed under gripper shoe are vertical corresponding one by one with two groups of carriages that are fixed on base.
Described outside lever and interior fork are rectangular frame structure, and horizontal connecting rod 4 separately, described interior fork lower end is connected with lower carriage 12, is provided with accordingly the limited block 11 that then limits whole hinge means oscillating stroke for limiting lower carriage on described base; Described outside lever upper end is also connected with upper bracket 17, and described upper rail slide block is hinged on outside lever upper end by upper bracket.Described driving mechanism is linear-motion actuator 16.Object is to promote fork bracing frame by linear-motion actuator push rod, the motion of drive outside lever, in being driven by hinge axis, fork moves, simultaneously, on base, be engaged in the guide rail slide block synchronous slide on guide rail, and then the interior fork and the outside lever angle that are right against seating plane reduce, and complete vertical motion thereby indirectly promote scanning bed gripper shoe.Similarly, linear-motion actuator retracts outside lever bracing frame, the motion of drive outside lever, by hinge axis, rotate backward and drive interior fork to move, meanwhile, the guide rail slide block synchronous backward being engaged on base on guide rail slides, and then, be right against fork and the increase of outside lever angle in seating plane, thereby promote scanning bed gripper shoe, complete down maneuver.
Described base wherein one end is also provided with lifting travel controller 8, encoder lifting travel controller cooperating corresponding with encoder is set on the connecting axle of outside lever lower end and completes lifting travel control.When hinge means completes rising and down maneuver under the promotion of linear-motion actuator, connecting axle also rotates respective angles, drive the equidirectional rotation of encoder, encoder passes to electronic control system by the angle information of rotation, by electronic control system, by converting, rotational angle is become to lifting distance output on display screen.
Described lower slider device rear end is provided with stroke duplicate protection mechanism 14.Described stroke double protecting device comprises contact and the switch that corresponding matching is used mutually up and down, and described switch is arranged on base, and described contact is arranged on switching support one end, on the lower carriage that in the switching support other end connects, fork bottom arranges.The quantity of described switch setting is at least two covers, and described switch comprises folded limit switch and utmost point guarantor switch by arranging mutually.When rise or falling-threshold switch touched after, to electronic control system, send signal out of service, elevating movement is out of service, completes defencive function for the first time.As emergency situations such as maloperations, it is touched that the utmost point is protected switch, to control system, sends power-off signal, and equipment is realized power operation, completes defencive function for the second time.Contact adopts Bilateral Symmetry design, and the contact on contact is designed to the domatic of one-sided two (or a plurality of) stepped folded different angles of leaning on and different contacts area, the domatic contact that is according to lifting travel distance.When the domatic and limit switch corresponding to limit switch touches, complete defencive function for the first time.Domatic while touching with it when what protect switch corresponding to the utmost point, complete defencive function for the second time.
Working position switch 20 is also set on described base, and working position switch line position is switching support back-end location in described contact opposite side.When linear-motion actuator pulls fork bracing frame, when driving hinge means to carry out vertical motion, the guide rail slide block of base sliding device moves, when a contact of contact touches working position switch, the scanning bed correct position that rises to of MRI is described, now, linear-motion actuator stops continuing to advance, electronic control system is sent and is allowed length feed motor message, scanning bedly can enter scanning area.
Shown in Fig. 1-2, the scanning bed electrical-controlled lifting of MRI mechanism is perfect scanning bed locomotive function, makes detected object scanning bed up and down voluntarily smoothly, has improved the detection efficiency of MRI.In addition, the design of the scanning bed electrical-controlled lifting of MRI mechanism hinge means is applicable, has improved lifting action stability.Journey controller has been realized the real-time Presentation Function of lifting formation distance.
1) two guide rail slide blocks are screwed to the two ends at upper bracket, then two guide rails are engaged on respectively on guide rail slide block, then, two guide rails are fixed on to the scanning bed gripper shoe of MRI below.Similarly, another two guide rail slide blocks are screwed to the two ends at lower carriage, then another two guide rails are engaged on respectively on guide rail slide block, then, two guide rails are screwed on the scanning bed base of MRI.Now, carriage installs.
2) with hinge axis, one group of outside lever and interior fork are tied, and are screwed.Similarly, another fork combination of composite joint.Then, with three fork connecting rods, two groups of forks are connected together.With screw, respectively the bearing of four groups of bearing blocks is connected to one end of fork combination, and with screw by four bearing blocks respectively between two one group be mounted on scanning bed gripper shoe below and base.Then, the other end of fork combination is connected with lower carriage two ends with upper bracket two ends respectively.
3) fork bracing frame is arranged on outside lever.Then, linear-motion actuator motor side is fixed on base, the other end is fixed on fork bracing frame mid point.In order to supporting, mobile fork, and then drive hinge axis, the carriage lifting action that slided.Linear-motion actuator is connected with electronic control system.
4) with screw, limited block is fixed on base, its set positions is the mechanical position limitation while guaranteeing the scanning bed rising excess of stroke.
5) then two groups of switch combinations in duplicate protection tissue, are fixed on to switching support one end by the single contact with many trigger points with screw is folded side by side by being arranged on base, the switching support other end is fixed on carriage lower carriage.Then, working position switch is placed on base, Stroke Control duplicate protection is organized the single contact opposite side of many trigger points.Make working position switch can first touch the first domatic of the single contact in many trigger points.Five switches are all connected with electronic control system.Now, range controlling mechanism duplicate protection tissue installs.
6) encoder is fixed on encoder support, then, encoder is connected by shaft coupling and connecting axle, then, encoder support is fixed on base, and encoder and electronic control system are joined.Now, lifting travel controller installs.
7) when electronic control system is sent enabled instruction, linear-motion actuator starts, and pulls fork bracing frame to move down, and hinge axis clockwise rotates, and meanwhile, the mobile guide rail slide block being engaged on guide rail that drives of lower carriage moves backward, realizes scanning bed down maneuver.Now, the encoder belt wheel on journey controller rotates, and sends moving distance information, and has electronic control system to convert angle information to decline displacement information, and show to electronic control system.
8) if scanning bed continuation declines, first of contact is domatic to be touched mutually with limit switch, and electronic control system is sent signal out of service, completes defencive function for the first time.Now, patient can oneself be scanning bed up and down.As emergency situations such as maloperations, it is touched that the utmost point is protected switch, to control system, sends power-off signal, and equipment is realized power operation, completes defencive function for the second time.
9) sufferer lie upper MRI scanning bed after, by electronic control system, send rising signals.Linear-motion actuator starts, and promotes fork bracing frame and moves, and hinge axis rotates counterclockwise simultaneously, meanwhile, drives the guide rail slide block being engaged on guide rail to move forward, realizes scanning bed vertical motion.Now, the encoder belt wheel on journey controller rotates, and sends moving distance information, and converts angle information to rising displacement information by electronic control system, and show to electronic control system.
10) linear-motion actuator pulls fork bracing frame, drive in the process that hinge means rises, and when first contact of contact is domatic while touching working position switch, the scanning bed correct position that rises to of MRI.Electronic control system is sent signal to linear-motion actuator, and linear-motion actuator stops drag fork bracing frame, and lifting action stops, and the scanning bed scanning area that can enter scans.
11) after completing scanning, bed board transports scanning area by patient, repeating step 7) and 8), control system lifting controllable mechanism drops to limit inferior position, and patient can oneself go down scanning bed, completes this scanography.
The foregoing is only preferred embodiment of the present utility model, non-in order to limit the scope of the claims of the present utility model, other use the equivalence of patent spirit of the present utility model to change, and all should all belong to the scope of the claims of the present utility model.