CN201418825Y - Center of gravity self-adjusting multifunctional medical vehicle - Google Patents

Abstract

The center of gravity self-adjusting multifunctional medical vehicle of the utility model relates to the field of medical equipment and aims to solve the technical problems of traditional products such as single function, high price, and lack of flexibility in use. The center of gravity self-adjusting multifunctional medical care vehicle of the utility model is composed of a frame, a fork lever mechanism, a parallel four-bar mechanism, a rack and pinion mechanism, a screw mechanism, a guiding mechanism, a universal wheel, and a rear bull wheel. The utility model is a center-of-gravity self-adjusting multifunctional medical vehicle which integrates the three functions of a medical vehicle, a medical bed and a wheelchair.

Description

Center of gravity self-adjusting multifunctional medical vehicle

technical field

The utility model relates to the field of medical equipment, in particular to a center-of-gravity self-adjusting multifunctional medical vehicle which integrates three functions of a medical vehicle, a medical bed and a wheelchair.

Background technique

At present, there are many types of disability assistance and rehabilitation machines on the market, but most of them have single functions and are expensive, especially medical vehicles, medical beds, and wheelchairs. There is no product on the market that can combine the functions of these three. The following is an attempt to compare the characteristics and shortcomings of traditional common products:

1. Wheelchair

1) The backrest can be rotated to a certain angle by means of ratchet or hydraulic pressure;

2) The backrest can be rotated to 180 degrees by supporting it on the ground.

Disadvantages:

(a) The ratchet method cannot be continuously adjusted, and the hydraulic method is too costly and cannot be folded. Both of them can only adjust the backrest to a certain angle (less than 135). If the angle is greater than this angle, the wheelchair will easily turn backwards;

(b) The wheelchair cannot move when the backrest is placed on the ground if the bracket is supported on the ground;

(c) Users cannot operate by themselves;

(d) The above three methods all require multiple operations to complete, and the backrest and legrest cannot be adjusted synchronously.

2. Hospital bed

It is divided into single-stage, two-stage and three-stage. Among them, the single-stage type is no different from the plank bed, while the two-stage and three-stage types both use the rocker screw drive to lift up and down. If it is a two-stage type, only the backrest can be raised and lowered. The rocker is located at the end of the hospital bed. If it is a three-stage type, it can be adjusted into a seat style. The rocker can be located on both sides of the hospital bed.

Disadvantages:

(a) No folding function;

(b) Although the three-stage type can be adjusted into a seat style that is convenient for the user to eat, it is not convenient for the user to engage in outdoor activities. When outdoor activities are required, they must be transferred from the hospital bed to the wheelchair;

(c) The user cannot operate by himself.

3. Ambulance

It is mainly used for first aid. It is no different from ordinary beds. The four corners are equipped with universal wheels. A few medical vehicles have fork lift devices to facilitate patient transfer.

Disadvantages:

(a) There is no folding function, and the space occupied during transportation is too large;

(b) The patient needs to move between the wheelchair, the medical cart, and the medical bed, which increases the pain of the patient.

Contents of the invention

The utility model aims to solve the technical problems of traditional products such as single function, high price, and lack of flexibility in use, so as to provide a medical car, a medical bed, and a wheelchair that integrate three functions, the center of gravity can be adjusted automatically, and the overall price is low. Use a flexible, foldable, and self-adjusting multifunctional medical vehicle with a small space.

The purpose of this utility model is achieved through the following technical solutions.

The center of gravity self-adjusting multifunctional medical vehicle of the present utility model is composed of a frame, a fork lever mechanism, a parallel four-bar mechanism, a rack and pinion mechanism, a screw mechanism, a guiding mechanism, a universal wheel 9 and a rear big wheel 2, and the left and right sides Each frame has a frame, and each frame consists of two upper and lower cross bars and the frame bar b17 on one side of the universal wheel 9 connecting the upper and lower two cross bars, the frame bar a5 in the middle and the rear big wheel 2 The support rod 39 on one side is formed; the fork rod mechanism is composed of the fork rod a7 and the fork rod b8 which are hinged in the middle of the rod body, and the upper parts of the two rods are respectively hinged with the upper horizontal rods on the left and right sides of the frame. The lower part is hinged on the lower crossbars of the two racks respectively; the parallel four-bar mechanism is inserted and matched with the upper crossbar of the frame through the front insertion rod 18 on the front side of the lower parallel side and the rear insertion rod 29 on the rear side; the rack and pinion The gear 3 of the mechanism is fixed on the support bar 39 of the frame, its upper toothing is connected to the upper rack 1, and its lower toothing is connected to the lower rack 6. Both racks are provided with grooves that match the bearings 43, and the gears 3 and the axle 4 are provided with a bushing 38, the rear wheel axle 4 is hinged with the lower rack 6, one end of the connecting rod 36 is hinged with the back bar 31 of the parallel four-bar mechanism, and the other end is hinged with the rack and pinion. The upper rack 1 of the mechanism is hinged; the screw mechanism is composed of a handle 28, a screw 25 and an internally threaded hole rod 26 fixed on the frame. One end of the screw 25 is connected to the handle 28, and the other end passes through the pressure plate 46 It is connected with the internal thread frame rod 26, and the pressure plate 46 is fixedly connected with the connecting rod a23 of the parallel four-bar mechanism; the guide mechanism is composed of a square guide rod 41 and bearings 43, and the bearings 43 on the same axis are evenly distributed in pairs On the guide rod, two bearings 43 in pairs are separated by a sleeve 45, and are respectively fastened with snap rings 37 on the outer end faces of the bearings.

In the center of gravity self-adjusting multi-functional medical vehicle of the present utility model, the parallel four-bar mechanism is composed of seat cushion 24, leg rest bar 15, connecting rod a23 and backrest bar 31 hinged in sequence.

In the center of gravity self-adjusting multifunctional medical vehicle of the present utility model, the foot pedal 14 is twisted at the lower end of the leg lever 15, and a hook 13 is provided near the joint of the two.

In the center of gravity self-adjusting multifunctional medical vehicle of the present utility model, the middle parts of the two backrest rods 31 are movably connected with push rods 32 .

In the center of gravity self-adjusting multifunctional medical vehicle of the present utility model, the universal wheel 9 is fixedly connected with the front end of the lower cross bar of the frame.

In the center of gravity self-adjusting multifunctional medical vehicle of the present utility model, an armrest 33 is provided on the outside of the connecting rod a23, and a movable sleeve 35 that can move up and down is arranged on the armrest 33 .

Beneficial effects of the utility model center of gravity self-adjusting multifunctional medical vehicle:

1. Integrate the three functions of medical car, medical bed and wheelchair into one;

2. Self-adjustment of the center of gravity: when a person is lying down or sitting up, the span between the front and rear wheels can be automatically adjusted as the position of the center of gravity of the person changes, so that the center of gravity of the person is always kept between the front and rear wheels, and no backturning occurs , and can be self-locked at any position within the range of 105 degrees to 180 degrees;

3. The armrest can be rotated 180 degrees, which is convenient for the user to transfer from the medical cart to other positions;

4. Foldable: When the center of gravity self-adjusting multifunctional medical vehicle is idle or in the process of transportation, it can be folded through the fork lever mechanism to save space;

5. Ancillary equipment such as toilet, infusion pole and dining table can be added.

Description of drawings

Fig. 1 is the right view of the vertical state of the utility model

Fig. 2 is the rear view of the vertical state of the utility model

Fig. 3 is the right view of the horizontal state of the utility model

Fig. 4 is the rear view of the folded state of the utility model

Fig. 5 is the schematic diagram of parallel four bar mechanism of the present utility model

Fig. 6 is the schematic diagram of screw mechanism of the present utility model

Figure 7 is a schematic diagram of the folding of the fork lever mechanism of the present invention

Figure 8 is a schematic diagram of the fork lever mechanism of the present utility model

Figure 9 is a schematic diagram of the rack and pinion mechanism and the guide mechanism of the present invention

Figure 10 is a sectional view of the guiding mechanism of the present utility model

Figure 11 is a schematic diagram of the fixed state of the handrail of the present utility model

Figure 12 is a schematic diagram of the state of the handrail of the utility model rotated 180 degrees

Figure 13 is a schematic diagram of the connection between the parallel four-bar mechanism, the rack and pinion mechanism and the guide mechanism of the present invention

Fig. 14 is a structural schematic diagram of the pedal of the utility model

Figure 15 is a schematic diagram of the open state of the pedal of the utility model

Explanation of symbols in the figure:

1. Upper rack 2. Rear large wheel 3. Gear 4. Axle 5. Rack rod a 6. Lower rack 7. Fork rod a 8. Fork rod b 9. Universal wheel 13. Hook 14. Pedal 15. Leg rest rod 17, frame rod b 18, front insert rod 21, hinge 23, connecting rod a 24, seat cushion 25, screw rod 26, internal thread rack rod 28, handle 29, rear insert rod 31, backrest rod 32 , push rod 33, armrest 34, cotter pin 35, sleeve 36, connecting rod b 37, circlip 38, bushing 39, support rod 40, retaining ring 41, guide rod 42, baffle plate 43, bearing 44, sleeve 45. Sleeve 46. Pressure plate

Detailed ways

The detailed structure, application principle, function and effect of the present utility model are described through the following implementation modes with reference to accompanying drawings 1-15.

Referring to shown in Fig. 1-15, the center of gravity self-adjusting multifunctional medical vehicle of the present utility model consists of a frame, a fork lever mechanism, a parallel four-bar mechanism, a rack and pinion mechanism, a screw mechanism, a guide mechanism, a universal wheel 9 and a rear Bull wheel 2 is made up of, and left and right sides respectively have a frame, and each frame is respectively by two cross bars up and down and connects two cross bars up and down and is positioned at the frame bar b17 of universal wheel 9 one side, is positioned at the frame bar b17 of middle part. The frame rod a5 and the support rod 39 located on one side of the rear big wheel 2 are formed; the fork rod mechanism is composed of a fork rod a7 and a fork rod b8 hinged in the middle of the rod body, and the upper parts of the two rods are connected with the frame on the left and right sides respectively. The upper cross bar is hinged, and its lower part is respectively hinged with the lower cross bars of the two frames; the parallel four-bar mechanism is connected to the frame by the front insertion rod 18 on the front side of the lower parallel side and the rear insertion rod 29 on the rear side. The cross bar is inserted and matched; the gear 3 of the rack and pinion mechanism is fixed on the support rod 39 of the frame, the upper tooth is connected to the upper rack 1, and the lower tooth is connected to the lower rack 6, and the two racks are provided with bearings. 43 matching grooves, a bushing 38 is provided between the gear 3 and the axle 4, the rear wheel axle 4 is hinged with the lower rack 6, and one end of the connecting rod 36 is hinged with the back bar 31 of the parallel four-bar mechanism , the other end of which is hinged with the upper rack 1 of the rack and pinion mechanism; the screw mechanism is composed of a handle 28, a screw 25 and an internally threaded hole rod 26 fixed on the frame, one end of the screw 25 is connected to the handle 28, and the other One end passes through the pressure receiving plate 46 and is connected with the internally threaded frame rod 26, and the pressure receiving plate 46 is fixedly connected with the connecting rod a23 of the parallel four-bar mechanism; the guiding mechanism is composed of a square guide rod 41 and a bearing 43, coaxial The bearings 43 of the center are evenly distributed on the guide rod in pairs, and the two bearings 43 in pairs are separated by the sleeve 45, and are fastened with jump rings 37 at the bearing outer end faces respectively.

Parallel four-bar mechanism is made up of successively hinged seat cushion 24, leg rest bar 15, connecting rod a23 backrest bar 31.

The lower end of the leg bar 15 is twisted to connect the pedal 14, and a hook 13 is provided near the joint of the two.

The middle part of two back bars 31 is flexibly connected with push rod 32.

The universal wheel 9 is fixedly connected with the front end of the lower cross bar of the frame.

The outer side of connecting rod a23 is provided with armrest 33, and movable sleeve 35 that can move up and down is arranged on armrest 33.

From Figure 1 to Figure 3, by rotating the handle on the screw mechanism 26, a force is applied to the pressure plate 46 on the connecting rod 23, so that the connecting rod 23 moves downward to the right, and the hinge drives the backrest rod 31 to move downward , the leg lever 15 moves upwards. During the operation of the backrest lever 31, the upper rack 1 and the connecting rod 36 are driven to move forward together through the connecting rod 36. During the movement of the upper rack 1, there are always three rows of bearings 43 is located inside the groove of the upper rack 1. The upper rack 1 drives the lower rack 6 to move backward through the gear 3. During the backward movement of the lower rack 6, the rear wheel axle 4 hinged with the lower rack 6 drives the rear wheel 2 slide backwards to gradually increase the span between the universal wheel 9 and the rear wheel 2 to realize self-adjustment of the center of gravity. The screw mechanism 26 has a self-locking function, and the back bar 31 and the leg bar 15 can be adjusted to any angle (90°∽180°) synchronously. By continuously adjusting to the state shown in Figure 3, the pedal 14 and the hook 13 are removed simultaneously (see figure 15), then pedal 14, leg bar 15, cushion and back bar 31 are located on the same horizontal plane, realize the conversion between the chair and the bed.

After being converted into the state shown in Figure 3, the self-locking function of the universal wheel 9 can be canceled to promote its motion and be converted into a medical car.

Moving the armrest sleeve 35 up and down can make the armrest 33 rotate 180° to a downward vertical state, which is convenient for the user to transfer the position.

From Fig. 3 to Fig. 1 state, through the reverse rotation of the handle on the screw mechanism 26, the force is applied to the pressure plate 46 on the connecting rod 23, so that the connecting rod 23 moves upward to the left, and the backrest rod 31 is driven upward through the hinge Movement, the leg lever 15 moves downward. During the operation of the backrest lever 31, the upper rack 1 and the connecting rod 36 are driven to move backward together through the connecting rod 36. During the movement of the upper rack 1, there are always three The row of bearings 43 is located inside the groove of the upper rack 1. The upper rack 1 drives the lower rack 6 to move forward through the gear 3. During the forward movement of the lower rack 6, the rear wheel axle 4 hinged with the lower rack 6 drives The rear wheel 2 slides forward, and the span between the universal wheel 9 and the rear wheel 2 is gradually reduced to realize self-adjustment of the center of gravity. The screw mechanism 26 has a self-locking function, and the back bar 31 and the leg bar 15 can be adjusted to any angle (90°∽180°) synchronously. By continuously adjusting to the state shown in FIG. 14), then pedal 14, leg bar 15, cushion and back bar 31 are converted into chair shape, realize the conversion between bed to chair.

During idle or transportation, the front inserting rod 18 and the rear inserting rod 29 are pulled out, and can be folded by the forks 7 and 8 (see Fig. 2, Fig. 4, Fig. 7, Fig. 8).

It can be seen from the above that the center of gravity self-adjusting multifunctional medical vehicle of the utility model integrates the three functions of a medical vehicle, a medical bed and a wheelchair. , It can be added with many advantages such as toilet, infusion pole and auxiliary equipment of dining table.

Claims (6)

1. A center of gravity self-adjusting multifunctional medical vehicle is characterized in that: by frame, fork lever mechanism, parallel four-bar mechanism, rack and pinion mechanism, screw mechanism, guide mechanism, universal wheel (9) and rear bull wheel (2) form, each has a frame on the left and right sides, and each frame is respectively by two cross bars up and down and the frame bar b (17) that is positioned at the universal wheel (9) side that connects two cross bars up and down 1. The frame bar a (5) positioned at the middle part and the support bar (39) positioned at one side of the rear big wheel (2) constitute; (8) Composition, the upper parts of the two bars are respectively hinged with the upper cross bars of the frame on the left and right sides, and the lower parts are respectively hinged with the lower cross bars of the two frames; The front inserting rod (18) on the side and the rear inserting rod (29) on the rear side are inserted and matched with the cross bar on the frame; the gear (3) of the rack and pinion mechanism is fixed on the support rod (39) of the frame, on which The teeth are connected to the upper rack (1), and the lower teeth are connected to the lower rack (6). Both racks are provided with grooves matching the bearings (43). Between the gear (3) and the axle (4) A bushing (38) is provided, the rear wheel axle (4) is hinged with the lower rack (6), one end of the connecting rod (36) is hinged with the backrest rod (31) of the parallel four-bar mechanism, and the other end It is hinged with the upper rack (1) of the rack and pinion mechanism; the screw mechanism is composed of a handle (28), a screw (25) and an internally threaded hole rod (26) fixed on the frame, and the screw (25) One end is connected to the handle (28), the other end passes through the pressure receiving plate (46) and is connected with the internal thread frame rod (26), and the pressure receiving plate (46) is fixedly connected with the connecting rod a (23) of the parallel four-bar mechanism The guide mechanism is made up of a square guide rod (41) and a bearing (43), and the concentric bearings (43) are evenly distributed in pairs on the guide rod, and the paired two bearings (43) pass through the sleeve (45 ) are separated, and fastened with snap rings (37) on the outer end faces of the bearings respectively. 2. The center of gravity self-adjusting multifunctional medical vehicle as claimed in claim 1, characterized in that: said parallel four-bar mechanism is composed of sequentially hinged seat cushion (24), leg rest bar (15), connecting rod a ( 23) backrest bar (31) is formed. 3. The center of gravity self-adjusting multifunctional medical vehicle according to claim 2, characterized in that: the lower end of the leg rest bar (15) is twisted to connect the pedal (14), and a hook (13) is provided near the joint of the two. ). 4. The center-of-gravity self-adjusting multifunctional medical vehicle according to claim 1, characterized in that: the middle parts of the two backrest bars (31) are movably connected to push rods (32). 5. The center-of-gravity self-adjusting multifunctional medical vehicle according to claim 1, characterized in that: said universal wheel (9) is fixedly connected with the front end of the lower cross bar of the frame. 6. The center-of-gravity self-adjusting multifunctional medical vehicle as claimed in claim 1, characterized in that: the outer side of the connecting rod a (23) is provided with an armrest (33), and the armrest (33) has movable up and down movable Sleeve (35).

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