CN110604649B - Lifting stretcher retraction device - Google Patents
Lifting stretcher retraction device Download PDFInfo
- Publication number
- CN110604649B CN110604649B CN201910957278.0A CN201910957278A CN110604649B CN 110604649 B CN110604649 B CN 110604649B CN 201910957278 A CN201910957278 A CN 201910957278A CN 110604649 B CN110604649 B CN 110604649B
- Authority
- CN
- China
- Prior art keywords
- stretcher
- connecting rod
- hinge point
- transmission gear
- lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 13
- 230000009467 reduction Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 11
- 230000006872 improvement Effects 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G1/00—Stretchers
- A61G1/06—Supports for stretchers, e.g. to be placed in or on vehicles
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Handcart (AREA)
Abstract
The invention relates to a lifting stretcher retraction device which comprises a stretcher support piece, a first connecting rod and a second connecting rod. The bottom end of the stretcher supporting piece is provided with a stretcher placing platform which is vertical to the stretcher supporting piece. A vertical force transmission arm is arranged on the stretcher support piece. One end of the first connecting rod is connected with the carrying platform of the carrying vehicle through a first hinge point, and the other end of the first connecting rod is connected with the free end part of the force transmission arm through a second hinge point. One end of the second connecting rod is connected with the carrying platform of the carrying vehicle by means of a third hinge point on the hinge support, and the other end of the second connecting rod is connected with the stretcher support piece by a fourth hinge point. The length of the first connecting rod is consistent with that of the second connecting rod. The distance between the first hinge point and the third hinge point is consistent with the distance between the second hinge point and the fourth hinge point. Thus, two stretchers can pick up wounded persons simultaneously. In addition, the stretcher is supported by virtue of the parallelogram linkage mechanism, so that the stretcher is effectively ensured to be always kept in a horizontal state in the transferring process.
Description
Technical Field
The invention relates to the technical field of field emergency vehicle manufacturing, in particular to a lifting stretcher retraction device.
Background
In rescuing wounded persons, transporting wounded persons is an important link, including transporting wounded persons to vehicles and rapidly transporting wounded persons to hospitals. In field rescue, how to stably and reliably place wounded persons into an emergency carriage by using a stretcher becomes a problem to be solved. In the prior art, the taking and placing operation of the stretcher is generally completed through the tail part of a carriage, specifically: the stretcher is unfolded through the drawing device arranged at the tail part of the carriage, and the drawing device is required to incline for a certain angle relative to the carriage bearing surface after being unfolded in order to reduce the height of the stretcher from the ground as far as possible, so that the stretcher cannot always keep a horizontal state in the picking and placing process, the riding comfort of wounded is further affected, and the wounded potential of the wounded is even aggravated. In addition, in the process of executing the scheme, only one unidirectional taking and placing operation is allowed at the same time, so that the precious time for receiving and curing a great number of wounded persons is delayed, and therefore, a technician is required to solve the problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a lifting stretcher retraction device which is simple in structural design, quick to operate and capable of always keeping a stretcher in a horizontal state.
In order to solve the technical problems, the invention relates to a lifting stretcher retraction device which comprises a stretcher support piece, a first connecting rod, a second connecting rod and a gear transmission mechanism. A stretcher placement platform is arranged on the stretcher support piece. The stretcher supporting piece is provided with a transmission arm which is fixed with the stretcher supporting piece in a vertical way. One end of the first connecting rod is connected to the carrying platform of the carrying vehicle through a first hinge point, and the other end of the first connecting rod is connected to the free end of the force transmission arm through a second hinge point. One end of the second connecting rod is connected to the carrying platform of the carrying vehicle by means of a third hinge point on the hinge support, and the other end of the second connecting rod is connected to one end, far away from the stretcher placing platform, of the stretcher supporting piece by means of a fourth hinge point. The gear transmission mechanism comprises a first transmission gear and a second transmission gear, wherein the first transmission gear is fixed on the side wall of the second connecting rod. The second transmission gear is also connected to the hinged support through a third hinge point and meshed with the first transmission gear. The stretcher placement platform is welded and fixed at the bottommost end of the stretcher support piece, and the stretcher placement platform and the stretcher support piece are mutually perpendicular. The length of the first connecting rod is consistent with that of the second connecting rod. The distance between the first hinge point and the third hinge point is consistent with the distance between the second hinge point and the fourth hinge point. In addition, the lifting stretcher retraction device also comprises a power part for driving the second transmission gear to do circumferential rotation movement.
As a further improvement of the technical scheme of the invention, the number of the lifting stretcher retraction devices is set to 2, and the lifting stretcher retraction devices are oppositely arranged along the left-right direction of the carrying vehicle.
As a further improvement of the technical scheme of the invention, the first transmission gear and the second transmission gear are externally meshed or internally meshed.
As a further improvement of the technical scheme of the invention, the first transmission gear and the second transmission gear are both helical gears, and the surfaces of the helical gears are carburized and hardened.
As a further improvement of the technical scheme of the invention, the power part comprises an operation hand wheel and a reduction gearbox. The reduction gearbox is fixed on the carrying platform of the carrying vehicle and connected between the operation hand wheel and the second transmission gear to realize the fixed ratio amplification transmission of manual torque.
As a further improvement of the technical scheme of the invention, the reduction gearbox is a worm gear reduction gearbox.
As a further improvement of the technical scheme of the invention, the hinged support is detachably fixed on the carrying platform of the carrying vehicle by means of screws, correspondingly, the hinged support is provided with a connecting through hole for the screws to pass through, and the carrying platform of the carrying vehicle is provided with threaded holes matched with the screws.
In the technical scheme disclosed by the invention, the wounded is picked up through the left side opening and the right side opening of the carriage, and the mode of picking up the tail of the carriage is completely different from the traditional mode, so that the operation of picking up the wounded by two stretchers simultaneously becomes possible, the time for collecting and treating the wounded is effectively reduced, and the working efficiency is improved. In addition, the stretcher is supported by virtue of the parallelogram link mechanism, so that the stretcher is always parallel to the bearing surface of the carriage in the retraction process, and the first link and the second link are always kept at the same angular displacement, angular speed and angular acceleration, so that the reliability and stability of the wounded transferring process are ensured, and the wounded is prevented from being secondarily damaged.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structure of the lifting stretcher retraction device in the unfolded state of the invention.
Fig. 2 shows a schematic structural view of the lifting stretcher folding and unfolding device in a folded state.
Fig. 3 is a top view (rotated 90 deg. counterclockwise) of fig. 2.
Fig. 4 shows a schematic structural view of the lifting stretcher folding and unfolding apparatus (hidden stretcher) in a folded state.
Fig. 5 is a top view of fig. 2 (with the stretcher removed and rotated 90 deg. counterclockwise).
Fig. 6 shows a schematic structural view of another embodiment of the lifting stretcher retraction device according to the invention in the unfolded state.
1-A stretcher support; 11-a stretcher placement platform; 12-force transmission arm; 2-a first link; 3-a second link; 4-gear transmission mechanism; 41-a first transmission gear; 42-a second transmission gear; 5-a hinged support; 6-a power section; 61-operating a hand wheel; 62-reduction gearbox.
Detailed Description
In the following description, the front-rear direction refers to the vehicle longitudinal direction, and the forward direction and the backward direction are respectively the front and rear directions. The left-right direction is the vehicle width direction, and the left and right directions when the driver is directed forward are left and right, respectively. The vertical direction refers to the vehicle height direction, and the direction on the ground side is defined as the lower direction and the direction on the opposite side is defined as the upper direction with respect to the vehicle. It is used merely for convenience in describing the invention and to simplify the description and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention.
In order to facilitate the understanding of the technical solution disclosed in the present invention by those skilled in the art, the following detailed description of the specific embodiments is provided, and fig. 1 shows a schematic structural diagram of the lifting stretcher retraction device in the unfolded state of the present invention, which mainly comprises a stretcher support member 1, a first connecting rod 2, a second connecting rod 3, a gear transmission mechanism 4 and a power unit 6 for driving the gear transmission mechanism 4. Wherein, a stretcher placing platform 11 is arranged on the stretcher support piece 1 and is used for placing and transporting wounded persons. A force transmission arm 12 which is fixed vertically to the stretcher support member 1 is welded and fixed on the stretcher support member 1. One end of the first connecting rod 2 is connected to the load carrying platform of the load carrying vehicle through a first hinge point, and the other end is connected to the free end of the force transferring arm 12 through a second hinge point. One end of the second connecting rod 3 is connected to the carrying platform of the carrying vehicle by means of a third hinge point on the hinge support 5, and the other end is connected to the stretcher support 1 at an end far from the stretcher placement platform 11 by means of a fourth hinge point. The gear transmission mechanism 4 includes a first transmission gear 41 and a second transmission gear 42, wherein the first transmission gear 41 is fixed to a side wall of the second link 3. The second transmission gear 42 is also connected to the hinge base 5 through a third hinge point, and is externally meshed with the first transmission gear 41. The stretcher placement platform 11 is welded to the bottommost end of the stretcher support 1, which is arranged perpendicular to each other. It should be emphasized that the length of the first link 2 is identical to that of the second link 3. The distance between the first hinge point and the third hinge point is consistent with the distance between the second hinge point and the fourth hinge point. In addition, the second transmission gear 42 is driven to perform a circumferential rotational movement by means of the above-described power portion 6.
Through adopting above-mentioned technical scheme to set up, above-mentioned first connecting rod 2, second connecting rod 3, stretcher support 1 and year thing platform have formed parallelogram link mechanism jointly to guaranteed that the stretcher remains parallel with the loading surface of carriage throughout in receive and release process, and first connecting rod 2 and second connecting rod 3 remain completely unanimous angular displacement, angular velocity and angular acceleration throughout, and then guaranteed the reliability and the stability of wounded's transfer process, avoided the wounded to receive the emergence of secondary damage phenomenon.
In addition, the number of the lifting stretcher collecting and releasing devices can be set to 2, and the lifting stretcher collecting and releasing devices are oppositely arranged along the left-right direction of the carrying vehicle, so that the wounded can be picked up simultaneously through the left-right opening of the carriage in the actual operation process, and the lifting stretcher collecting and releasing device is completely different from the traditional carriage tail picking-up mode, so that the simultaneous wounded picking-up operation of two stretchers is possible, the wounded collecting and curing time is effectively reduced, and the working efficiency is improved.
In order to facilitate the technical solution to be more clearly understood by the person skilled in the art, fig. 2 and fig. 3 respectively show a schematic structural view and a top view of the lifting stretcher folding and unfolding device in a folded state. Fig. 4 and 5 show a schematic structural view and a top view of a lifting stretcher folding and unfolding device in a folded state when the stretcher is hidden.
The above-described first transmission gear 41 and second transmission gear 42 are each preferably helical gears (not shown in the drawings) in view of reducing the operational noise. The known helical gear meshing process is a transitional process, and the stress on gear teeth is gradually reduced from small to large and then from large to small, so that the high overlap ratio is realized, the impact noise is effectively reduced, and the service life is prolonged. In addition, the surface of the helical gear can be carburized and hardened, so that the wear resistance of the helical gear is improved, and the service life of the helical gear is further prolonged.
Here, the structure of the power unit 6 for operating the drive gear train 4 is further refined, and the power unit 6 is mainly composed of an operation hand wheel 61 and a reduction gearbox 62. The reduction gearbox 62 is detachably fixed on the carrying platform of the carrying vehicle by means of bolts and is connected between the operating hand wheel 61 and the second transmission gear 42 to achieve a proportional amplified transmission of manual torque (as shown in fig. 3). In the actual operation process, the worker transmits power to the reduction gearbox 62 by rotating the operation hand wheel 61 in the circumferential direction, and then drives the second transmission gear 42 to rotate in the circumferential direction after force amplification, and the first transmission gear 41 is completely fixed on the second connecting rod 3, so that swinging of the connecting rod mechanism is realized.
Of course, in view of self-locking, the reduction gearbox 62 is preferably a worm gear reduction gearbox, so that the stretcher can be ensured to hover at any position without additionally arranging a limiting device, the design structure is greatly simplified, and the manufacturing cost of the stretcher retraction device is effectively reduced.
In view of convenience and rapidity of adjusting the distances between the first hinge point and the third hinge point so as to ensure that the link mechanism maintains the parallelogram state, the connection mode between the hinge support 5 and the carrying platform of the carrying vehicle is set to be detachable, specifically: the hinged support 5 is detachably fixed on the carrying platform of the carrying vehicle by means of screws, correspondingly, a connecting through hole for the screws to pass through is formed in the hinged support 5, and a threaded hole matched with the screws is formed in the carrying platform of the carrying vehicle.
Generally, a series of connecting through holes can be formed on the carrying platform of the carrying vehicle to be adapted to the screws.
Fig. 6 shows a schematic structural view of another embodiment of the lifting stretcher retraction device in the unfolded state according to the present invention, which is different from the first embodiment in that: the first drive gear ring gear 41 engages the inner race of the second drive gear 42. Compared with external engagement, the internal engagement gear transmission has the advantages of compact structure, small volume and high bearing capacity.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The lifting stretcher retraction device is characterized by comprising a stretcher support piece, a first connecting rod, a second connecting rod and a gear transmission mechanism; a stretcher placement platform is arranged on the stretcher support piece; a transmission arm which is fixed vertically with the stretcher support piece is arranged on the stretcher support piece; one end of the first connecting rod is connected to the carrying platform of the carrying vehicle through a first hinge point, and the other end of the first connecting rod is connected to the free end of the force transmission arm through a second hinge point; one end of the second connecting rod is connected to the carrying platform of the carrying vehicle by means of a third hinge point on the hinge support, and the other end of the second connecting rod is connected to one end, far away from the stretcher placing platform, of the stretcher supporting piece by means of a fourth hinge point; the gear transmission mechanism comprises a first transmission gear and a second transmission gear, wherein the first transmission gear is fixed on the side wall of the second connecting rod; the second transmission gear is also connected to the hinged support through the third hinge point and meshed with the first transmission gear; the stretcher placement platform is welded and fixed at the bottommost end of the stretcher support piece, and the stretcher placement platform and the stretcher support piece are mutually perpendicular; the length of the first connecting rod is consistent with that of the second connecting rod; the distance between the first hinge point and the third hinge point is consistent with the distance between the second hinge point and the fourth hinge point; in addition, the device also comprises a power part for driving the second transmission gear to do circumferential rotation movement.
2. The lifting type stretcher folding and unfolding apparatus according to claim 1, wherein the number of the lifting type stretcher folding and unfolding apparatuses is set to 2, and the lifting type stretcher folding and unfolding apparatuses are oppositely arranged along the left-right direction of the width direction of the carrier vehicle.
3. The lifting stretcher retraction device according to claim 1, wherein the first transmission gear and the second transmission gear are externally or internally engaged.
4. The lifting stretcher folding and unfolding apparatus according to claim 3, characterized in that the first transmission gear and the second transmission gear are both helical gears, and the surfaces thereof are carburized and hardened.
5. The lifting stretcher retraction device according to any one of claims 1 to 4 wherein the power section comprises an operating hand wheel and a reduction gearbox; the reduction gearbox is fixed on a carrying platform of a carrying vehicle and connected between the operation hand wheel and the second transmission gear so as to realize fixed ratio amplifying transmission of manual torque.
6. The lifting stretcher retraction device according to claim 5, wherein the reduction gearbox is a worm gear reduction gearbox.
7. The lifting stretcher retraction device according to any one of claims 1 to 4, wherein the hinged support is detachably fixed on the carrying platform of the carrying vehicle by means of screws, correspondingly, the hinged support is provided with a connecting through hole for the screws to pass through, and the carrying platform of the carrying vehicle is provided with threaded holes matched with the screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910957278.0A CN110604649B (en) | 2019-10-10 | 2019-10-10 | Lifting stretcher retraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910957278.0A CN110604649B (en) | 2019-10-10 | 2019-10-10 | Lifting stretcher retraction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110604649A CN110604649A (en) | 2019-12-24 |
| CN110604649B true CN110604649B (en) | 2024-07-09 |
Family
ID=68894310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910957278.0A Active CN110604649B (en) | 2019-10-10 | 2019-10-10 | Lifting stretcher retraction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110604649B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2620132A1 (en) * | 2012-01-26 | 2013-07-31 | NEXTER Systems | Device to assist with loading a stretcher and ambulance provided with such a device |
| WO2014187081A1 (en) * | 2013-05-23 | 2014-11-27 | 宁波凯福莱特种汽车有限公司 | Automatic loading stretcher system |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB325835A (en) * | 1928-11-29 | 1930-02-28 | Herbert Southern | Improvements appertaining to ambulances |
| CN2416881Y (en) * | 2000-04-07 | 2001-01-31 | 中国人民解放军军事医学科学院卫生装备研究所 | Suppart for stretcher to be placed on vehicle |
| CN2425640Y (en) * | 2000-04-29 | 2001-04-04 | 储关森 | Strectcher cart for ambulance |
| NZ514833A (en) * | 2001-10-16 | 2004-09-24 | Howard Wright Ltd | Strecher Suspension Linkages |
| TW200607483A (en) * | 2004-08-19 | 2006-03-01 | Guo zhong xian | Wheelchair elevating device for cars |
| IT1401350B1 (en) * | 2010-08-06 | 2013-07-18 | Stem Srl | VEHICLE - AMBULANCE FOR THE TRANSPORT OF PATIENTS, WOUND AND SIMILAR |
| CN102579205B (en) * | 2012-03-26 | 2014-10-08 | 苏州江南航天机电工业有限公司 | Wounded personnel transporting mechanism of automotive stretcher |
| CN203226960U (en) * | 2013-04-17 | 2013-10-09 | 王兴松 | Transferring bed for transferring patients in medical field |
| CN107981993B (en) * | 2017-12-21 | 2019-11-26 | 重庆馨康阁科技有限公司 | Give first aid to Vehicular stretcher support construction |
| CN209091889U (en) * | 2018-07-06 | 2019-07-12 | 广州优德士航空服务有限公司 | The dedicated airborne stretcher of aviation |
-
2019
- 2019-10-10 CN CN201910957278.0A patent/CN110604649B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2620132A1 (en) * | 2012-01-26 | 2013-07-31 | NEXTER Systems | Device to assist with loading a stretcher and ambulance provided with such a device |
| WO2014187081A1 (en) * | 2013-05-23 | 2014-11-27 | 宁波凯福莱特种汽车有限公司 | Automatic loading stretcher system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110604649A (en) | 2019-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102398270B (en) | Robot arm part | |
| KR101997944B1 (en) | Load and lift roof rack | |
| CN106394710B (en) | A kind of wheel shoe combination auxiliary carrying stair climbing robot | |
| US9358880B2 (en) | Tandem differential for a bogey application | |
| WO2009069144A2 (en) | Methods and systems for ascending and descending stairs | |
| CN104884314A (en) | Two-speed automatic shift landing gear | |
| CN102729239A (en) | All-dimensional manipulator | |
| JP2002264856A (en) | Stair climbing device | |
| CN102814810B (en) | Rescue device | |
| CN105916744B (en) | For the height adjustable support of vehicle | |
| CN110604649B (en) | Lifting stretcher retraction device | |
| JP2020186130A (en) | Double lift device for trailer type RV | |
| CN113071579A (en) | Automatic guide transport vehicle with goods shelf and transport method thereof | |
| CN110652667B (en) | A mobile rescue robot | |
| JP3566230B2 (en) | Traveling device | |
| CN109018050A (en) | A kind of weight bearing stair climbing robot | |
| CN113602328B (en) | Safe carrying anti-smashing device for civil engineering construction | |
| CN212825410U (en) | Horizontal robot ball-shooting integrated device | |
| CN112573445B (en) | Ultra-wide unit plate transferring hanger for curtain wall and transferring method | |
| CN210408801U (en) | Novel emergency nursing stretcher | |
| CN204212477U (en) | A kind of machinery garage vehicle is reinforced and is pushed platform | |
| CN104358439B (en) | A kind of machinery garage vehicle is reinforced and is pushed platform | |
| CN111844065B (en) | Horizontal robot bowling integrated device | |
| CN108621721B (en) | Rear bracket for amphibious vehicle | |
| CN213201183U (en) | Telescopic device and handling robot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |