CN111703480B

CN111703480B - Medical trolley

Info

Publication number: CN111703480B
Application number: CN202010626249.9A
Authority: CN
Inventors: 张楼锋
Original assignee: Individual
Current assignee: Zhuji Sanshui Textile Co.,Ltd.
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2021-07-16
Anticipated expiration: 2039-08-13
Also published as: CN111703480A; CN111703481A; CN110356444B; CN110356444A; CN111703481B

Abstract

The invention belongs to the technical field of a trolley, and particularly relates to a medical trolley which comprises a base, a push rod, front wheels, a steering mechanism and rear wheels, wherein the traveling mechanism of the trolley adopts four traditional traveling wheels without an automatic steering function, the trolley adjusts the swing of the front wheels through the steering mechanism in the steering process, and drives the trolley through the swing of the front wheels to realize the steering function; the external force required by the cart for steering is relatively small; and this shallow compares in the shallow that traditional medical treatment field used, and some medical treatment heavy objects can be carried in pulling to this shallow, and use more conveniently and laborsaving than traditional medical shallow that has the universal wheel.

Description

Medical trolley

Technical Field

The invention belongs to the technical field of carts, and particularly relates to a medical cart.

Background

At present, in hospitals, medical staff often need to transfer a plurality of medical instruments, medical appliances and the like to required places during working, and a trolley is generally used for transferring the medical instruments.

Generally, a cart used in medical treatment is provided with four universal wheels which are convenient for the cart to steer, but when the cart with the four universal wheels steers in the advancing process of bearing heavier objects, the cart with the four universal wheels is very inconvenient because the cart with the four universal wheels has larger bearing weight and larger inertia and the steering needs to be driven by manpower completely; for such heavy goods carts, in order to achieve steering of the carts in motion with less effort, such carts generally employ front-wheel steering or rear-wheel steering instead of conventional four-wheel steering; at present, the cart adopts universal wheels to realize front wheel steering or rear wheel steering; however, when the universal wheels are located on a road surface with a slope and are in a straight line or in a steering process, the cart also needs a large force to steer when steering, and if the cart stops on the slope, the cart cannot stop on the road surface with the slope completely and still because the front wheels or the rear wheels are the universal wheels and the universal wheels steer automatically on the slope, so that the cart which can pull heavy objects on the road surface with the slope and can be steered or stopped easily during running is very necessary to design.

The invention designs a medical trolley to solve the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a medical trolley which is realized by adopting the following technical scheme.

A medical cart, comprising: the steering mechanism comprises a base, a push rod, front wheels, a steering mechanism and rear wheels, wherein the two front wheels are symmetrically arranged on the lower side surface of the front end of the base, and the two rear wheels are symmetrically arranged on the lower side surface of the rear end of the base; the steering mechanism is arranged on the lower side of the base; a push rod is arranged on the upper side surface of the rear end of the base.

The push rod is provided with two symmetrically distributed mounting sleeves, two ends of the steering control rod are nested in the two mounting sleeves, and a first return spring is respectively arranged between each of the two ends of the steering control rod and the inner end face of the corresponding mounting sleeve; the steering control rod can slide in the two mounting sleeves, and the first return spring plays a role in returning the steering control rod.

A third fixed support is fixedly arranged on the lower side of the front end of the base; the two front wheels are respectively arranged at two ends of the third fixed support through a front wheel frame, and the two front wheel frames are respectively in running fit with the third fixed support.

The steering mechanism comprises a first adjusting plate, a second return spring, adjusting rods, guide rails, a third return spring, a fixed guide sleeve, a third adjusting plate, a fourth adjusting plate, a fifth adjusting plate, a slide block and a U-shaped adjusting plate, wherein one ends of the two sixth adjusting plates are fixedly arranged on two front wheel carriers for mounting the front wheels respectively, and two ends of the first adjusting plate are connected with the other ends of the two sixth adjusting plates respectively in a hinged mode; two second return springs are symmetrically arranged between the two ends of the first adjusting plate and the base; the second return spring plays a role in returning to the first adjusting plate; one end of the second adjusting plate is fixedly arranged at the lower side of the first adjusting plate; when the second adjusting plate swings, the second adjusting plate can drive the first adjusting plate to swing, the first adjusting plate swings to drive the two sixth adjusting plates to swing, the two sixth adjusting plates swing to drive the two front wheel frames mounted on the front wheels to rotate, and the front wheel frames rotate to drive the front wheels to swing, so that the steering function is realized; the upper end of the first fixed shaft is fixedly arranged on the lower side surface of the base, and one end of the guide rail is arranged on the lower side of the base through the fixed plate; the sliding block is arranged on the guide rail in a sliding fit manner; the sliding block can slide in the guide rail; a second fixed shaft is arranged at the upper end of the sliding block, a third fixed shaft is arranged at the lower end of the sliding block, one end of a third adjusting plate is arranged at the lower end of the first fixed shaft, the upper end of a fourth fixed shaft is arranged at the other end of the third adjusting plate, one end of the fourth adjusting plate is arranged at the lower end of the fourth fixed shaft, and the other end of the fourth adjusting plate is arranged on the second fixed shaft; the fifth fixing shaft is arranged at the other end of the second adjusting plate, and the second adjusting plate is positioned at the upper end of the fifth fixing shaft; one end of the fifth adjusting plate is arranged at the lower end of the fifth fixing shaft, and the other end of the fifth adjusting plate is arranged on the third fixing shaft; two third return springs are symmetrically arranged between the fourth adjusting plate and the base; the third return spring is used for returning the fourth adjusting plate; the two fixed guide sleeves are symmetrically arranged on the lower side of the base, two ends of the adjusting rod are nested on the two fixed guide sleeves, the U-shaped adjusting plate is fixedly arranged on the adjusting rod and matched with the lower end of the fourth fixed shaft, and the U-shaped adjusting plate is matched with the upper end of the fifth fixed shaft; the adjusting rod moves to drive the U-shaped adjusting plate to move, and the U-shaped adjusting plate moves to drive the fourth fixing shaft and the fifth fixing shaft to move.

The two ends of the steering control rod are connected with the two ends of the adjusting rod through two steel wire ropes.

In the process of straight line walking, because the steering control rod is in a static state under the action of the two first return springs, the steel wire ropes on the two sides of the steering control rod are also in a tensioned state, namely the adjusting rods connected with the two steel wire ropes are in a static state, the adjusting rods cannot move left and right, and the U-shaped adjusting plate is in a static state; the fourth fixed shaft is in a static state and cannot swing left and right; in this state, the third adjusting plate and the fourth adjusting plate are in a 180-degree straight swinging state, and the third adjusting plate and the fourth adjusting plate reach a self-locking balance state; the sliding block connected with the fourth adjusting plate is also in a static state and cannot slide relative to the guide rail; the second adjusting plate connected with the fifth adjusting plate through the fifth fixing shaft is in a static state and cannot swing, namely the first adjusting plate and the sixth adjusting plate are in a static state, and two front wheel carriers connected with the two sixth adjusting plates are in a static state and cannot swing; namely, the two front wheels are locked to be incapable of swinging and only can walk along a straight line.

When the steering control rod is controlled to move, the steering control rod can pull a steel wire rope arranged on the steering control rod to move, the steel wire rope can pull an adjusting rod to move towards the direction of the movement of the steering control rod, the adjusting rod moves to drive a U-shaped adjusting plate to move towards the direction of the movement of the steering control rod, the U-shaped adjusting plate moves to drive a fourth fixed shaft and a fifth fixed shaft to move, the fourth fixed shaft moves to drive a third adjusting plate to rotate around a first fixed shaft, the third adjusting plate rotates to drive a fourth adjusting plate to swing, the self-locking state of the fourth adjusting plate and the third adjusting plate is broken, the fourth adjusting plate swings to drive a sliding block to swing, the sliding block slides towards one side provided with the fourth fixed shaft in a guide rail, the sliding block moves to drive the fifth adjusting plate to swing, meanwhile, the U-shaped adjusting plate moves to drive the fifth fixed shaft to move, and the fifth fixed shaft, the fifth adjusting plate swings to drive the second adjusting plate to swing; the swing of the second adjusting plate can lead the front wheel to swing, thus realizing the steering function.

As a further improvement of the technology, the push rod is provided with a steel wire rope hole, one end of each of the two steel wire ropes is arranged on the steering control rod, and the other end of each of the two steel wire ropes penetrates through the steel wire rope hole on the push rod to be connected with the adjusting rod.

As a further improvement of the technology, the upper side of the base is provided with a cambered surface, and the support plate is installed on the upper side of the base through sliding fit.

As a further improvement of the technology, the third fixed support is mounted on the lower side of the base through three evenly distributed second fixed supports.

As a further improvement of the technology, two first fixed supports are symmetrically arranged at two ends of the upper side of the first adjusting plate; the mounting panel is installed at the downside of base and is located first regulating plate upside, the centre of two first fixed bolsters, and two second reset spring's one end fixed mounting is in the both sides of mounting panel symmetrically, and two second reset spring's the other end is installed respectively on two corresponding first fixed bolsters.

As a further improvement of the technology, two first guide wheels are symmetrically and fixedly installed on the lower side of the rear end of the base; two second guide wheels are symmetrically arranged on the lower side of the base; the two sections of steel wire ropes are respectively connected with the adjusting rod by bypassing the first guide wheel and the second guide wheel which are positioned on the same side; the first guide wheel and the second guide wheel play a role in guiding the steel wire rope.

As a further improvement of the technology, three arc guide grooves which are uniformly distributed are formed in an arc surface formed on the base, three T-shaped guide blocks are uniformly arranged on the lower side of the support plate, and the support plate is arranged on the upper side of the base through the sliding fit of the three T-shaped guide blocks and the three arc guide grooves; the supporting plate has the advantages that when the cart is pushed to advance, the cart is not easy to push due to the fact that articles borne on the cart are heavy and inertia is large, but the lower side of the cart can be pushed easily when the cart is started through the designed supporting plate, the supporting plate and the weights on the supporting plate cannot move under the action of inertia, but the lower portion of the cart starts to move, large resistance on the ground is overcome, the cart can walk normally, the supporting plate and the weights on the supporting plate can move together after being adapted, and the supporting plate can swing to the middle of the base finally under the action of the weights on the supporting plate; the cart is easier to start than a cart without a designed support plate.

As a further improvement of the technology, two fourth fixed supports are symmetrically arranged on the lower side of the base; one ends of the two third return springs are symmetrically arranged at two sides of the fourth adjusting plate, and the other ends of the two third return springs are arranged on the corresponding two fourth fixed supports.

As a further improvement of the technology, the inner side of the guide rail is symmetrically provided with two guide grooves, two sides of the slide block are symmetrically provided with two guide blocks, and the slide block is arranged in the guide rail through the sliding fit of the two guide blocks and the two guide grooves.

As a further improvement of the technology, two elastic pieces are symmetrically installed on the inner side surface of the matching end of the U-shaped adjusting plate and the fifth fixing shaft, and the elastic pieces are used for preventing parts on the cart from loosening and the like after the cart is used for a long time.

Compared with the traditional medical trolley, the trolley designed by the invention has the advantages that the trolley walking mechanism adopts four traditional walking wheels without an automatic steering function, the steering mechanism is used for adjusting the swing of the front wheels of the trolley in the steering process, and the front wheels swing to drive the trolley to realize the steering function; when the cart runs on a road surface with a slope to steer, compared with a cart which only adopts universal wheels to steer by front wheels or rear wheels, the cart needs to pay relatively small external force for steering; meanwhile, compared with a traditional cart used in the medical field, the cart can be used for carrying some medical heavy objects, and is more convenient and labor-saving to use than the traditional medical cart with universal wheels. In addition, when the automobile is started, the swinging support plate is designed, so that the automobile has the beneficial effect of saving labor when starting; when the vehicle is parked on a slope, the cart is firstly rotated to be in a transverse placing state with the slope surface in the inclined direction, and the front wheels are adjusted to be restored to the steering self-locking position, so that the vehicle can be placed on the slope, and the self-locking of the front wheels at the righting position has the beneficial effect of being convenient for parking.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

Fig. 3 is a schematic view of the steering mechanism installation.

Fig. 4 is a schematic illustration of the push rod installation.

Fig. 5 is a schematic view of the mounting of the support plate.

Fig. 6 is a schematic view of the structure of the support plate.

Fig. 7 is a schematic view of a steering control lever mounting.

Fig. 8 is a schematic view of a steering mechanism arrangement.

Fig. 9 is a rear wheel mounting schematic.

FIG. 10 is a front wheel mounting schematic.

Fig. 11 is a schematic structural view of the steering mechanism.

Fig. 12 is a schematic of a wireline connection.

Fig. 13 is a schematic view of a first guide wheel structure.

Fig. 14 is a schematic view of the rail arrangement.

FIG. 15 is a schematic view of the fourth and fifth modulation plates installed.

FIG. 16 is a schematic view of the fourth and fifth stationary shafts in their arrangement.

Fig. 17 is a schematic view of a slider installation.

Figure 18 is a schematic view of the U-shaped adjustment plate installation.

Number designation in the figures: 1. a base; 2. a push rod; 3. a front wheel; 4. a steering mechanism; 5. a rear wheel; 6. an arc-shaped guide groove; 7. installing a sleeve; 8. a wire rope hole; 9. a steering control lever; 10. a first return spring; 11. a wire rope; 12. a cambered surface; 13. a second return spring; 14. a sixth adjustment plate; 16. a second fixed support; 17. a front wheel carrier; 18. a first adjusting plate; 19. a first fixed support; 20. a second adjusting plate; 21. mounting a plate; 22. a first guide wheel; 23. a second guide wheel; 24. a fixing plate; 25. a third fixed support; 26. adjusting a rod; 28. a guide rail; 29. a third return spring; 30. a fourth fixed support; 31. fixing the guide sleeve; 32. a first fixed shaft; 33. a third adjusting plate; 34. a fourth adjusting plate; 35. a fifth adjusting plate; 36. a slider; 42. a guide groove; 43. a guide block; 44. a second fixed shaft; 45. a third fixed shaft; 46. a fourth fixed shaft; 47. a U-shaped adjustment plate; 48. a fifth fixed shaft; 49. an elastic sheet; 50. a support plate; 51. t-shaped guide blocks.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and 2, it comprises a base 1, a push rod 2, front wheels 3, a steering mechanism 4, and rear wheels 5, wherein as shown in fig. 3, two front wheels 3 are symmetrically installed on the lower side surface of the front end of the base 1, and as shown in fig. 3 and 9, two rear wheels 5 are symmetrically installed on the lower side surface of the rear end of the base 1; as shown in fig. 3 and 8, the steering mechanism 4 is mounted on the lower side of the base 1; as shown in fig. 4, a push rod 2 is installed on the upper side surface of the rear end of the base 1.

As shown in fig. 4, the push rod 2 has two symmetrically distributed mounting sleeves 7, as shown in fig. 7, two ends of the steering control rod 9 are nested in the two mounting sleeves 7, and a first return spring 10 is respectively mounted between the two ends of the steering control rod 9 and the inner end surface of the corresponding mounting sleeve 7; the steering control rod 9 can slide in the two mounting sleeves 7, and the first return spring 10 has a return effect on the steering control rod 9.

As shown in fig. 10, a third fixing support 25 is fixedly mounted on the lower side of the front end of the base 1; the two front wheels 3 are respectively installed at two ends of the third fixed support 25 through a front wheel frame 17, and the two front wheel frames 17 are respectively in rotating fit with the third fixed support 25.

As shown in fig. 10 and 11, the steering mechanism 4 includes a first adjusting plate 18, a second adjusting plate 20, a second return spring 13, an adjusting rod 26, a guide rail 28, a third return spring 29, a fixing guide 31, a third adjusting plate 33, a fourth adjusting plate 34, a fifth adjusting plate 35, a slider 36, and a U-shaped adjusting plate 47, wherein as shown in fig. 10, one ends of two sixth adjusting plates 14 are respectively and fixedly mounted on two front wheel frames 17 on which the front wheels 3 are mounted, and two ends of the first adjusting plate 18 are respectively connected with the other ends of the two sixth adjusting plates 14 in a hinged manner; two second return springs 13 are symmetrically arranged between the two ends of the first adjusting plate 18 and the base 1; the second return spring 13 plays a role in returning the first adjusting plate 18; one end of the second adjusting plate 20 is fixedly installed at the lower side of the first adjusting plate 18; when the second adjusting plate 20 swings, the second adjusting plate 20 drives the first adjusting plate 18 to swing, the first adjusting plate 18 swings to drive the two sixth adjusting plates 14 to swing, the two sixth adjusting plates 14 swing to drive the two front wheel frames 17 mounted on the front wheels 3 to rotate, and the front wheel frames 17 rotate to drive the front wheels 3 to swing, so that a steering function is realized; as shown in fig. 3 and 15, the upper end of the first fixed shaft 32 is fixedly mounted on the lower side of the base 1, and as shown in fig. 3 and 14, one end of the guide rail 28 is mounted on the lower side of the base 1 through the fixed plate 24; as shown in fig. 17, the slider 36 is mounted on the guide rail 28 by a sliding fit; the slider 36 can slide in the guide 28; a second fixed shaft 44 is installed at the upper end of the slider 36, a third fixed shaft 45 is installed at the lower end of the slider 36, as shown in fig. 16, one end of the third adjusting plate 33 is installed at the lower end of the first fixed shaft 32, the upper end of the fourth fixed shaft 46 is installed at the other end of the third adjusting plate 33, one end of the fourth adjusting plate 34 is installed at the lower end of the fourth fixed shaft 46, and the other end of the fourth adjusting plate 34 is installed on the second fixed shaft 44; a fifth fixing shaft 48 is installed at the other end of the second adjusting plate 20, and the second adjusting plate 20 is located at the upper end of the fifth fixing shaft 48; one end of the fifth adjusting plate 35 is mounted on the lower end of the fifth fixed shaft 48, and the other end of the fifth adjusting plate 35 is mounted on the third fixed shaft 45; two third return springs 29 are symmetrically arranged between the fourth adjusting plate 34 and the base 1; the third return spring 29 functions to return the fourth adjusting plate 34; as shown in fig. 3 and 11, two fixed guide sleeves 31 are symmetrically installed at the lower side of the base 1, two ends of the adjusting rod 26 are nested on the two fixed guide sleeves 31, the U-shaped adjusting plate 47 is fixedly installed on the adjusting rod 26, the U-shaped adjusting plate 47 is matched with the lower end of the fourth fixed shaft 46, and the U-shaped adjusting plate 47 is matched with the upper end of the fifth fixed shaft 48; the movement of the adjustment lever 26 drives the U-shaped adjustment plate 47 to move, and the movement of the U-shaped adjustment plate 47 drives the fourth fixed shaft 46 and the fifth fixed shaft 48 to move.

As shown in fig. 11 and 12, both ends of the steering control rod 9 and both ends of the adjustment rod 26 are connected to each other by two wire ropes 11.

In the process of straight line walking, because the steering control rod 9 is in a static state under the action of the two first return springs 10, the steel wire ropes 11 on the two sides of the steering control rod 9 are also in a tensioned state, namely the adjusting rods 26 connected with the two steel wire ropes 11 are in a static state, the adjusting rods 26 cannot move left and right, and the U-shaped adjusting plate 47 is in a static state; the fourth fixed shaft 46 is in a stationary state and does not swing left and right; in this state, the third adjusting plate 33 and the fourth adjusting plate 34 are in a 180-degree straight state, and the third adjusting plate 33 and the fourth adjusting plate 34 reach a self-locking balance state; the slide block 36 connected with the fourth adjusting plate 34 is also in a static state and cannot slide relative to the guide rail 28; the second adjusting plate 20 connected to the fifth adjusting plate 35 by the fifth fixing shaft 48 is in a static state and cannot swing, that is, the first adjusting plate 18 and the sixth adjusting plate 14 are in a static state, and the two front wheel frames 17 connected to the two sixth adjusting plates 14 are in a static state and cannot swing; namely, the two front wheels 3 are locked to rotate and cannot swing, and only can walk along a straight line.

In the invention, when the steering control rod 9 is controlled to move, the steering control rod 9 can pull the steel wire rope 11 mounted on the steering control rod 9 to move, the steel wire rope 11 can pull the adjusting rod 26 to move towards the direction of the movement of the steering control rod 9, the adjusting rod 26 moves to drive the U-shaped adjusting plate 47 to move towards the direction of the movement of the steering control rod 9, the U-shaped adjusting plate 47 moves to drive the fourth fixing shaft 46 and the fifth fixing shaft 48 to move, the fourth fixing shaft 46 moves to drive the third adjusting plate 33 to rotate around the first fixing shaft 32, the third adjusting plate 33 rotates to drive the fourth adjusting plate 34 to swing, the self-locking state of the fourth adjusting plate 34 and the third adjusting plate 33 is broken, the fourth adjusting plate 34 swings to drive the sliding block 36 to swing, so that the sliding block 36 slides towards the side provided with the fourth fixing shaft 46 in the guide rail 28, and the, meanwhile, the movement of the U-shaped adjusting plate 47 drives the fifth fixing shaft 48 to move, the movement of the fifth fixing shaft 48 provides a swinging direction for the swinging of the fifth adjusting plate 35, and the fifth adjusting plate 35 swings to drive the second adjusting plate 20 to swing; the swinging of the second adjusting plate 20 causes the front wheels 3 to swing, thereby achieving a steering function.

As shown in fig. 7, the push rod 2 is provided with a wire rope hole 8, one end of each of two sections of wire ropes 11 is mounted on the steering control rod 9, and the other end passes through the wire rope hole 8 on the push rod 2 to be connected with the adjusting rod 26.

As shown in fig. 4, the upper side of the base 1 has an arc surface 12, and as shown in fig. 5, a support plate 50 is installed on the upper side of the base 1 by a sliding fit.

As shown in fig. 3 and 10, the third fixed support 25 is mounted on the lower side of the base 1 by three evenly distributed second fixed supports 16.

As shown in fig. 10, two first fixing supports 19 are symmetrically installed at both ends of the upper side of the first adjusting plate 18; the mounting plate 21 is installed at the lower side of the base 1 and located at the upper side of the first adjusting plate 18, in the middle of the two first fixing supports 19, one ends of the two second return springs 13 are symmetrically and fixedly installed at the two sides of the mounting plate 21, and the other ends of the two second return springs 13 are respectively installed on the corresponding two first fixing supports 19.

As shown in fig. 11 and 13, two first guide wheels 22 are symmetrically and fixedly mounted on the lower side of the rear end of the base 1; two second guide wheels 23 are symmetrically arranged on the lower side of the base 1; two sections of steel wire ropes 11 respectively wind around a first guide wheel 22 and a second guide wheel 23 which are positioned on the same side; the first guide pulley 22 and the second guide pulley 23 guide the wire rope 11.

As shown in fig. 4, three arc guide grooves 6 are uniformly distributed on the arc surface 12 formed on the base 1, as shown in fig. 6, three T-shaped guide blocks 51 are uniformly installed on the lower side of the support plate 50, as shown in fig. 5, the support plate 50 is installed on the upper side of the base 1 through the sliding fit of the three T-shaped guide blocks 51 and the three arc guide grooves 6; the supporting plate 50 is used for preventing the cart from being pushed easily because articles borne by the cart are heavy, the inertia is large, and various static friction is large when the cart is pushed to advance, but the supporting plate 50 is designed so that the lower side of the cart can be pushed easily when the cart is started up, the weights on the supporting plate 50 and the supporting plate 50 cannot move under the action of inertia, but the lower part of the cart starts to move, the resistance for starting is overcome, the cart can normally walk, the weights on the supporting plate 50 and the supporting plate 50 can move together after being adapted, and under the action of the weights on the supporting plate 50, the supporting plate 50 can finally swing to the middle of the base 1 after being swung for a plurality of times; the cart is easier to start than a cart without the design of the support plate 50.

As shown in fig. 3 and 15, two fourth fixing supports 30 are symmetrically installed on the lower side of the base 1; one ends of the two third return springs 29 are symmetrically installed at both sides of the fourth adjusting plate 34, and the other ends of the two third return springs 29 are installed at the corresponding two fourth fixed supports 30.

As shown in fig. 17, two guide grooves 42 are symmetrically formed inside the guide rail 28, two guide blocks 43 are symmetrically installed on both sides of the slider 36, and the slider 36 is installed in the guide rail 28 by the sliding fit of the two guide blocks 43 and the two guide grooves 42.

As shown in fig. 18, two elastic pieces 49 are symmetrically installed on the inner side surface of the end of the U-shaped adjusting plate 47, which is engaged with the fifth fixed shaft 48, and the elastic pieces 49 are used for preventing the parts on the cart from loosening after the cart is used for a long time, in this state, the front wheel 3 may slightly swing after being subjected to an external force, the front wheel 3 swings to swing the fifth fixed shaft 48, the U-shaped adjusting plate 47 is tightly contacted with the fourth fixed shaft 46 through the elasticity of the two elastic pieces 49, and the U-shaped adjusting plate 47 cannot continuously play a role of restricting the swing of the fifth fixed shaft 48 when the fifth fixed shaft 48 slightly swings.

In summary, the following steps:

the beneficial effects of the design of the invention are as follows: according to the medical trolley, the traveling mechanism of the trolley adopts four traditional traveling wheels without an automatic steering function, the trolley adjusts the swing of the front wheel 3 through the steering mechanism 4 in the steering process, and the trolley is driven to achieve the steering function through the swing of the front wheel 3; when the cart walks on a road surface with a slope for steering, compared with the cart which only adopts the front wheels 3 or the rear wheels 5 to realize steering by adopting the universal wheels; the external force required by the cart for steering is relatively small; meanwhile, compared with a traditional cart used in the medical field, the cart can be used for carrying some medical heavy objects, and is more convenient and labor-saving to use than the traditional medical cart with universal wheels. In addition, when the automobile is started, the swinging support plate is designed, so that the automobile has the beneficial effect of saving labor when starting; when the vehicle is parked on a slope, the cart is firstly rotated to be in a transverse placing state with the slope surface in the inclined direction, and the front wheels are adjusted to be restored to the steering self-locking position, so that the vehicle can be reliably placed on the slope, and the self-locking of the front wheels at the righting position has the beneficial effect of being convenient for parking.

The specific working process is as follows: when the medical trolley designed by the invention is used, the medical trolley can run in a straight line, the front wheels 3 are locked by self-locking of the fourth adjusting plate 34 and the third adjusting plate 33, the trolley cannot swing easily, and the trolley can run in a straight line normally; when the steering wheel is turned, firstly, the steering control rod 9 is controlled to move, the steering control rod 9 can pull the steel wire rope 11 arranged on the steering control rod 9 to move, the steel wire rope 11 moves to pull the adjusting rod 26 to move towards the direction of the movement of the steering control rod 9, the adjusting rod 26 moves to drive the U-shaped adjusting plate 47 to move towards the direction of the movement of the steering control rod 9, the U-shaped adjusting plate 47 moves to drive the fourth fixing shaft 46 and the fifth fixing shaft 48 to move, the fourth fixing shaft 46 moves to drive the third adjusting plate 33 to rotate around the first fixing shaft 32, the third adjusting plate 33 rotates to drive the fourth adjusting plate 34 to swing, the self-locking state of the fourth adjusting plate 34 and the third adjusting plate 33 is broken, the fourth adjusting plate 34 swings to drive the sliding block 36 to swing, so that the sliding block 36 slides towards the side provided with the fourth fixing shaft 46 in the guide rail 28, meanwhile, the movement of the U-shaped adjusting plate 47 drives the fifth fixing shaft 48 to move, the movement of the fifth fixing shaft 48 provides a swinging direction for the swinging of the fifth adjusting plate 35, and the fifth adjusting plate 35 swings to drive the second adjusting plate 20 to swing; the swinging of the second adjusting plate 20 causes the front wheels 3 to swing, thereby achieving a steering function.

Claims

1. A medical cart, comprising: the steering mechanism comprises a base, a push rod, front wheels, a steering mechanism and rear wheels, wherein the two front wheels are symmetrically arranged on the lower side surface of the front end of the base, and the two rear wheels are symmetrically arranged on the lower side surface of the rear end of the base; the steering mechanism is arranged on the lower side of the base; a push rod is arranged on the upper side surface of the rear end of the base;

the push rod is provided with two symmetrically distributed mounting sleeves, two ends of the steering control rod are nested in the two mounting sleeves, and a first return spring is respectively arranged between each of the two ends of the steering control rod and the inner end face of the corresponding mounting sleeve;

a third fixed support is fixedly arranged on the lower side of the front end of the base; the two front wheels are respectively arranged at two ends of the third fixed support through a front wheel frame, and the two front wheel frames are respectively in running fit with the third fixed support;

the steering mechanism comprises a first adjusting plate, a second return spring, adjusting rods, guide rails, a third return spring, a fixed guide sleeve, a third adjusting plate, a fourth adjusting plate, a fifth adjusting plate, a slide block and a U-shaped adjusting plate, wherein one ends of the two sixth adjusting plates are fixedly arranged on two front wheel carriers for mounting the front wheels respectively, and two ends of the first adjusting plate are connected with the other ends of the two sixth adjusting plates respectively in a hinged mode; two second return springs are symmetrically arranged between the two ends of the first adjusting plate and the base; one end of the second adjusting plate is fixedly arranged at the lower side of the first adjusting plate; the upper end of the first fixed shaft is fixedly arranged on the lower side surface of the base, and one end of the guide rail is arranged on the lower side of the base through the fixed plate; the sliding block is arranged on the guide rail in a sliding fit manner; a second fixed shaft is arranged at the upper end of the sliding block, a third fixed shaft is arranged at the lower end of the sliding block, one end of a third adjusting plate is arranged at the lower end of the first fixed shaft, the upper end of a fourth fixed shaft is arranged at the other end of the third adjusting plate, one end of the fourth adjusting plate is arranged at the lower end of the fourth fixed shaft, and the other end of the fourth adjusting plate is arranged on the second fixed shaft; the fifth fixing shaft is arranged at the other end of the second adjusting plate, and the second adjusting plate is positioned at the upper end of the fifth fixing shaft; one end of the fifth adjusting plate is arranged at the lower end of the fifth fixing shaft, and the other end of the fifth adjusting plate is arranged on the third fixing shaft; two third return springs are symmetrically arranged between the fourth adjusting plate and the base; the two fixed guide sleeves are symmetrically arranged on the lower side of the base, two ends of the adjusting rod are nested on the two fixed guide sleeves, the U-shaped adjusting plate is fixedly arranged on the adjusting rod and matched with the lower end of the fourth fixed shaft, and the U-shaped adjusting plate is matched with the upper end of the fifth fixed shaft;

the two ends of the steering control rod and the two ends of the adjusting rod are connected with each other through two steel wire ropes;

the upper side of the base is provided with a cambered surface, and the supporting plate is arranged on the upper side of the base in a sliding fit manner;

three arc guide grooves which are uniformly distributed are formed in the arc surface formed on the base, three T-shaped guide blocks are uniformly arranged on the lower side of the supporting plate, and the supporting plate is arranged on the upper side of the base through the sliding fit of the three T-shaped guide blocks and the three arc guide grooves;

two elastic pieces are symmetrically arranged on the inner side surface of one end, matched with the fifth fixed shaft, of the U-shaped adjusting plate;

the push rod is provided with a steel wire rope hole, one end of each of the two steel wire ropes is arranged on the steering control rod, and the other end of each of the two steel wire ropes penetrates through the steel wire rope hole on the push rod to be connected with the adjusting rod;

the third fixed support is arranged on the lower side of the base through three second fixed supports which are uniformly distributed;

two first fixed supports are symmetrically arranged at two ends of the upper side of the first adjusting plate; the mounting panel is installed at the downside of base and is located first regulating plate upside, the centre of two first fixed bolsters, and two second reset spring's one end fixed mounting is in the both sides of mounting panel symmetrically, and two second reset spring's the other end is installed respectively on two corresponding first fixed bolsters.

2. A medical trolley according to claim 1, wherein: two first guide wheels are symmetrically and fixedly installed on the lower side of the rear end of the base; two second guide wheels are symmetrically arranged on the lower side of the base; the two sections of steel wire ropes are respectively connected with the adjusting rod by bypassing the first guide wheel and the second guide wheel which are positioned on the same side.

3. A medical trolley according to claim 1, wherein: two fourth fixed supports are symmetrically arranged on the lower side of the base; one ends of the two third return springs are symmetrically arranged at two sides of the fourth adjusting plate, and the other ends of the two third return springs are arranged on the corresponding two fourth fixed supports.

4. A medical trolley according to claim 1, wherein: two guide grooves are symmetrically formed in the inner side of the guide rail, two guide blocks are symmetrically arranged on two sides of the sliding block, and the sliding block is arranged in the guide rail through the sliding fit of the two guide blocks and the two guide grooves.