CN108186226B - Self-locking sickbed for medical use based on variable-direction transmission - Google Patents

Abstract

The invention belongs to the technical field of sickbeds, and particularly relates to a self-locking sickbed for medical use based on variable-direction transmission, which comprises a trigger mechanism, a sickbed body and a self-locking mechanism, wherein when people use the sickbed designed by the invention, no matter a user pushes forwards, pulls backwards or pulls obliquely or pushes a trigger driving rod, the movement of the driving rod can enable a fourth rotating shaft to rotate; the fourth rotating shaft rotates to enable the corresponding arc-shaped friction plate to lose the constraint on the limiting cylinder and the rotating shaft; namely, the rotating shaft and the second transmission shaft can rotate freely; namely, the roller can rotate freely; namely, the sickbed can be normally used. When the user wants to stop the sickbed, the driving of the trigger driving rod is stopped at the moment, so that the rotating shaft and the second transmission shaft lose the rotating function; namely the roller loses the rotation function; i.e. the patient bed is at rest at this time.

Description

Self-locking sickbed for medical use based on variable-direction transmission

Technical Field

The invention belongs to the technical field of sickbeds, and particularly relates to a self-locking sickbed for medical use based on variable-direction transmission.

Background

In the existing hospital, the sickbed is always required to be moved when patients are transferred, and the sickbed is required to be moved at the moment; but it is necessary to keep the bed in a stationary state after the bed is stopped; if the sickbed moves at the moment; it is possible to make the patient on the sickbed suffer vibration or collide with other articles and other patients, which is extremely unsuitable for some patients, especially for the patient needing nursing after cardiology department, the vibration of the patient should be reduced as much as possible, and the wound after the department of cardiology should be prevented from cracking again due to vibration and shaking. Therefore, it is necessary to design a self-locking sickbed when the sickbed is in a static state.

The invention designs a self-locking sickbed for medical use based on variable-direction transmission, which solves the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a self-locking sickbed for medical use based on variable-direction transmission, which is realized by adopting the following technical scheme.

The utility model provides a self-locking sick bed that medical treatment was used based on become direction transmission which characterized in that: the sickbed comprises a trigger mechanism, a sickbed body and a self-locking mechanism, wherein the trigger mechanism is arranged on the upper side of a baffle at one end of the sickbed body; four self-locking mechanisms are respectively arranged at four corners of the lower side surface of the sickbed body.

The trigger mechanism comprises a supporting block, a stop lever, a trigger mounting structure, a trigger driving rod, a guide block, a trigger block, a regulating block, a compression spring, a first gear, a guide groove, a first guide groove, a mounting cavity, a first guide block, a connecting plate, a first rack, a first rotating shaft, a first gap, a second gear, a third gear, a fourth gear, a fifth gear, a mounting guide groove, a first trigger spring, a second rotating shaft, a third rotating shaft, a fourth rotating shaft, a fifth rotating shaft, a first sliding block, a second sliding block and a limiting spring, wherein one end of the supporting block is provided with a through guide groove; the two supporting blocks are respectively arranged on two sides of the upper end of a baffle plate on one side of the sickbed body; the two stop rods are uniformly arranged between the two supporting blocks and are close to the bed plate on the sickbed body; the trigger mounting structure consists of an arched connection and two mounting blocks, wherein the two mounting blocks are respectively mounted at two ends of the arched connection; the trigger mounting structure is mounted at the upper ends of the two supporting blocks; two mounting blocks in the trigger mounting structure are respectively positioned at two sides of the two supporting blocks; the inner side of one of the two mounting blocks is provided with a mounting cavity, the end surface of one side of the mounting block, which is close to the corresponding supporting block, is provided with a first notch, the first notch is matched with the guide groove on the corresponding supporting block, the upper end surface and the lower end surface of one side of the mounting cavity in the mounting block, which is close to the first notch, are symmetrically provided with two first guide grooves, and the lower end surface of one side of the mounting cavity in the mounting block, which is far away from the first notch, is provided with two mounting guide grooves; one end of the trigger block is provided with an inclined plane; one end of the trigger driving rod is provided with a guide block, and the other end of the trigger driving rod is provided with a trigger block; the trigger driving rod is arranged on the two supporting blocks through the matching of the guide block and the trigger block with the guide grooves on the two supporting blocks; a limiting spring is respectively arranged between the two side surfaces of the guide block and the two side surfaces of the first guide groove on the corresponding support block; a limiting spring is respectively arranged between two side surfaces of the trigger block and two side surfaces of the first guide groove on the corresponding supporting block; the adjusting block is provided with an inclined plane; two first guide blocks are symmetrically arranged on two sides of the adjusting block; the adjusting block is arranged in the mounting cavity on the corresponding mounting block through the matching of the two first guide blocks and the two first guide grooves on the mounting block; the inclined plane on the adjusting block is matched with the inclined plane on the triggering block; one end of the connecting plate is arranged on the side surface of the adjusting block which is not provided with the inclined surface; the other end of the connecting plate is provided with a first rack; a compression spring is arranged between one side of the connecting plate, which is far away from the upper inclined plane of the adjusting block, and the corresponding side surface of the mounting cavity; one end of the first rotating shaft is arranged on the upper end surface of the mounting cavity on the corresponding mounting block; the first gear is arranged on the first rotating shaft; the first gear is meshed with the first rack; one end of the fifth rotating shaft is provided with a second sliding block; the fifth rotating shaft is installed in the installation cavity on the corresponding installation block through the matching of the second sliding block and the installation guide groove in the corresponding installation block; a second trigger spring is arranged between the second sliding block and the corresponding installation guide groove; the fifth gear is arranged on the fifth rotating shaft; the fifth gear is matched with the first gear; one end of the second rotating shaft is provided with a first sliding block; the second rotating shaft is arranged in the mounting cavity on the corresponding mounting block through the matching of the first sliding block and the mounting guide groove in the corresponding mounting block; a first trigger spring is arranged between the first sliding block and the corresponding installation guide groove; the second gear is arranged on the second rotating shaft; the second gear is matched with the first gear; the third rotating shaft is arranged in the mounting cavity on the corresponding mounting block; the third gear is arranged on the third rotating shaft; the third gear is matched with the second gear; the upper end of the fourth rotating shaft is arranged on the upper end surface of the mounting cavity on the corresponding mounting block; the fourth gear is arranged on the fourth rotating shaft; the fourth gear is meshed with the third gear; the fourth gear is matched with the fifth gear.

The self-locking mechanism comprises a supporting rod, an installation ring shell, an installation U-shaped shell, a roller, a rotating shaft, a first transmission shaft, a second transmission shaft, a limiting cylinder, a telescopic connection, a U-shaped driving plate, an extrusion spring, an arc-shaped friction plate, an annular guide block, a rotating groove, a shaft hole, an annular guide groove, a friction plate avoiding groove, a third transmission shaft, a first supporting shaft, a first support, a fourth transmission shaft, a second support, an installation hole, a cam, a seventh rotating shaft and a third support, wherein the lower end of the supporting rod is provided with a rotating groove; two friction plate avoiding grooves are formed in the inner circular surface of the upper side of the rotating groove; the two friction plate avoiding grooves are uniformly distributed up and down; the inner circle surface at the lower side of the rotating groove is provided with an annular guide groove; the upper end of the supporting rod is arranged on the end surface of the lower side of the sickbed body; the center of the rotating shaft is provided with a through shaft hole; the outer circular surface of the rotating shaft is provided with an annular guide block; the rotating shaft is arranged at the lower end of the supporting rod through the matching of the annular guide block and the annular guide groove; two shaft holes are symmetrically arranged in the U-shaped groove for installing the U-shaped shell; the two shaft holes are communicated with the inner side of the mounting U-shaped shell; the mounting U-shaped shell is mounted at the lower end of the rotating shaft; one end of the first supporting shaft is provided with a bevel gear; one end of the first supporting shaft, which is not provided with the bevel gear, is arranged in one of the two shaft holes on the installation U-shaped shell; one end of the first supporting shaft with the bevel gear penetrates through the other shaft hole of the two shaft holes on the mounting U-shaped shell and is positioned on the inner side of the mounting U-shaped shell; the roller is arranged on the first supporting shaft and is positioned in a U-shaped groove on the U-shaped shell; both ends of the fourth transmission shaft are provided with bevel teeth; the fourth transmission shaft is arranged on the inner side of the mounting U-shaped shell through a second support; one end of the fourth transmission shaft is meshed with the first support shaft through bevel teeth; the third transmission shaft is arranged on the inner side of the mounting U-shaped shell through a first support; one end of the third transmission shaft is meshed with the other end of the fourth transmission shaft through bevel teeth; one end of the second transmission shaft is provided with bevel teeth; the second transmission shaft is arranged in the shaft hole on the rotating shaft; one end of the second transmission shaft is meshed with the other end of the third transmission shaft through bevel teeth; the limiting cylinder is arranged at the other end of the second transmission shaft and is positioned in the rotating groove; two mounting holes are formed in the inner circular surface of the outer side of the mounting ring shell, and the two mounting holes are uniformly distributed up and down; the mounting ring shell is mounted on the outer circular surface of the lower side of the supporting rod; two mounting holes on the mounting ring shell are matched with two friction plate avoiding grooves on the supporting rod; two telescopic connections are symmetrically arranged on one side of the U-shaped driving plate; the U-shaped driving plate is arranged on the inner side of the mounting ring shell in a matching way with the two corresponding mounting holes on the mounting ring shell through two telescopic connections; an extrusion spring is arranged between the other side of the U-shaped driving plate and the inner circular surface of the mounting ring shell; the two arc-shaped friction plates are respectively arranged on the end surfaces of the two telescopic connectors far away from one side of the U-shaped driving plate; the two arc-shaped friction plates are matched with the two corresponding friction plate avoiding grooves on the supporting rod; the two arc-shaped friction plates are respectively matched with the limiting cylinder and the rotating shaft; the seventh rotating shaft is arranged in the mounting ring shell through a third support; the cam is arranged on the seventh rotating shaft; the cam is matched with one side surface of the U-shaped groove on the U-shaped driving plate.

The guide direction of the installation guide groove corresponding to the fifth gear is mutually vertical to the central connection of the first gear and the fifth gear; the guide direction of the installation guide groove corresponding to the second gear is perpendicular to the center connection of the first gear and the second gear.

The fourth rotating shaft and the seventh rotating shaft are connected through a flexible shaft.

As a further improvement of the technology, the telescopic connection comprises a telescopic outer sleeve, a telescopic inner rod and a driving spring, wherein one end of the telescopic inner rod is arranged on the U-shaped driving plate; one end of the telescopic outer sleeve is nested and arranged at the other end of the telescopic inner rod; a driving spring is arranged between the telescopic inner rod arranged at the inner side of the telescopic outer sleeve and the inner end surface of the telescopic outer sleeve; the other end of the telescopic outer sleeve is provided with an arc-shaped friction plate.

As a further improvement of the technology, the trigger block and the adjusting block are in a balanced state under the common elastic force of the two corresponding limiting springs and the compression spring in the initial state.

As a further improvement of the technology, the annular guide blocks and the corresponding annular guide grooves are installed through bearings.

As a further improvement of the technology, the limiting spring is a compressible and stretchable spring; the trigger driving rod is used for returning the trigger driving rod.

Compared with the traditional sickbed technology, the sickbed designed by the invention can control the locking state of the sickbed rollers by identifying the stress state of the push rod on the sickbed, thereby controlling the movement and the stop of the sickbed.

Two supporting blocks are respectively arranged on two sides of the upper end of a baffle on one side of a sickbed body; the two stop rods are uniformly arranged between the two supporting blocks and are close to the bed plate on the sickbed body; the trigger mounting structure is mounted at the upper ends of the two supporting blocks; one end of the trigger block is provided with an inclined plane; one end of the trigger driving rod is provided with a guide block, and the other end of the trigger driving rod is provided with a trigger block; the trigger driving rod is arranged on the two supporting blocks through the matching of the guide block and the trigger block with the guide grooves on the two supporting blocks; the adjusting block is provided with an inclined plane; the adjusting block is arranged in the mounting cavity on the corresponding mounting block through the matching of the two first guide blocks and the two first guide grooves on the mounting block; a limiting spring is respectively arranged between the two side surfaces of the guide block and the two side surfaces of the first guide groove on the corresponding support block; a limiting spring is respectively arranged between two side surfaces of the trigger block and two side surfaces of the first guide groove on the corresponding supporting block; the inclined plane on the adjusting block is matched with the inclined plane on the triggering block; one end of the connecting plate is arranged on the adjusting block; the other end of the connecting plate is provided with a first rack; a compression spring is arranged between one side of the connecting plate, which is far away from the upper inclined plane of the adjusting block, and the corresponding side surface of the mounting cavity; one end of the first rotating shaft is arranged on the upper end surface of the mounting cavity on the corresponding mounting block; the first gear is arranged on the first rotating shaft; the first gear is meshed with the first rack; one end of the fifth rotating shaft is provided with a second sliding block; the fifth rotating shaft is installed in the installation cavity on the corresponding installation block through the matching of the second sliding block and the installation guide groove in the corresponding installation block; a second trigger spring is arranged between the second sliding block and the corresponding installation guide groove; the fifth gear is arranged on the fifth rotating shaft; the fifth gear is matched with the first gear; one end of the second rotating shaft is provided with a first sliding block; the second rotating shaft is arranged in the mounting cavity on the corresponding mounting block through the matching of the first sliding block and the mounting guide groove in the corresponding mounting block; a first trigger spring is arranged between the first sliding block and the corresponding installation guide groove; the second gear is arranged on the second rotating shaft; the second gear is matched with the first gear; the third rotating shaft is arranged in the mounting cavity on the corresponding mounting block; the third gear is arranged on the third rotating shaft; the third gear is matched with the second gear; the upper end of the fourth rotating shaft is arranged on the upper end surface of the mounting cavity on the corresponding mounting block; the fourth gear is arranged on the fourth rotating shaft; the fourth gear is meshed with the third gear; the fourth gear is matched with the fifth gear; the trigger block and the adjusting block are in a balanced state under the common elasticity of the two corresponding limiting springs and the compression spring in the initial state. When the trigger driving rod is pushed forwards, the trigger driving rod can drive the trigger block to move forwards along the first guide groove on the corresponding supporting block; the trigger block moves forwards to push the regulating block to move forwards; the adjusting block moves forwards to drive the connecting plate to move forwards; the connecting plate moves forwards to drive the first rack to move forwards; the forward movement of the first rack can enable the first gear to rotate; the first gear rotates to drive the second gear to rotate; the second gear rotates to drive the third gear to rotate; the third gear rotates to drive the fourth gear to rotate; the fourth gear rotates to drive the fourth rotating shaft to rotate; when the trigger driving rod is pulled backwards, the trigger driving rod drives the trigger block to move backwards along the first guide groove on the corresponding supporting block; in the process that the trigger block moves backwards, the adjusting block moves backwards under the action of the compression spring; the adjusting block moves backwards to drive the connecting plate to move backwards; the connecting plate moves backwards to drive the first rack to move backwards; the first gear is rotated by the backward movement of the first rack; the first gear rotates to drive the fifth gear to rotate; the fifth gear rotates to drive the fourth gear to rotate; the fourth gear rotates to drive the fourth rotating shaft to rotate; when the trigger driving rod is pushed towards one side of the adjusting block, the trigger driving block drives the trigger block to move towards the side provided with the adjusting block; the trigger block moves towards one side provided with the adjusting block, so that the adjusting block moves forwards under the matching of the first guide block and the first guide groove; the adjusting block moves forwards to drive the connecting plate to move forwards; the connecting plate moves forwards to drive the first rack to move forwards; the forward movement of the first rack can enable the first gear to rotate; the first gear rotates to drive the second gear to rotate; the second gear rotates to drive the third gear to rotate; the third gear rotates to drive the fourth gear to rotate; the fourth gear rotates to drive the fourth rotating shaft to rotate; when the trigger driving rod is pulled by the side far away from the adjusting block, the trigger driving block drives the trigger block to move towards the side far away from the side provided with the adjusting block; the trigger block moves towards one side far away from the side provided with the adjusting block, so that the adjusting block moves backwards under the matching of the first guide block and the first guide groove; the adjusting block moves backwards to drive the connecting plate to move backwards; the connecting plate moves backwards to drive the first rack to move backwards; the first gear is rotated by the backward movement of the first rack; the first gear rotates to drive the fifth gear to rotate; the fifth gear rotates to drive the fourth gear to rotate; the fourth gear rotates to drive the fourth rotating shaft to rotate. When the first gear drives the fifth gear to rotate, the first gear can provide extrusion force for the second gear, so that the second gear drives the second rotating shaft to move towards one side far away from the first gear along the corresponding installation guide groove; disengaging the second gear from the first gear and the third gear; namely, the rotation of the fourth gear does not adversely affect the rotation of the first gear; when the first gear drives the second gear to rotate, the first gear can provide extrusion force for the fifth gear, so that the fifth gear drives the fifth rotating shaft to move towards one side far away from the first gear along the corresponding installation guide groove; disengaging the fifth gear from the first gear and the fourth gear; i.e. the rotation of the fourth gear does not adversely affect the rotation of the first gear.

Two telescopic connections are symmetrically arranged on one side of a U-shaped driving plate; the U-shaped driving plate is arranged on the inner side of the mounting ring shell in a matching way with the two corresponding mounting holes on the mounting ring shell through two telescopic connections; an extrusion spring is arranged between the other side of the U-shaped driving plate and the inner circular surface of the mounting ring shell; the two arc-shaped friction plates are respectively arranged on the end surfaces of the two telescopic connectors far away from one side of the U-shaped driving plate; the two arc-shaped friction plates are matched with the two corresponding friction plate avoiding grooves on the supporting rod; the two arc-shaped friction plates are respectively matched with the limiting cylinder and the rotating shaft; the seventh rotating shaft is arranged in the mounting ring shell through a third support; the cam is arranged on the seventh rotating shaft; the cam is matched with one side surface of a U-shaped groove on the U-shaped driving plate; the fourth rotating shaft is connected with the seventh rotating shaft through a flexible shaft; when the fourth rotating shaft rotates to drive the seventh rotating shaft to rotate, the seventh rotating shaft drives the cam to rotate; the cam rotates to push the corresponding U-shaped driving plate to move towards one side far away from the limiting cylinder; the U-shaped driving plate moves to drive the telescopic inner rods in the two corresponding telescopic connections to move towards one side far away from the limiting cylinder; the two telescopic inner rods move towards one side far away from the limiting cylinder, so that the corresponding two arc-shaped friction plates lose the extrusion effect of the corresponding driving springs on the arc-shaped friction plates.

The upper end of the supporting rod is arranged on the end surface of the lower side of the sickbed body; the rotating shaft is arranged at the lower end of the supporting rod through the matching of the annular guide block and the annular guide groove; the mounting U-shaped shell is mounted at the lower end of the rotating shaft; one end of the first supporting shaft is provided with a bevel gear; one end of the first supporting shaft, which is not provided with the bevel gear, is arranged in one of the two shaft holes on the installation U-shaped shell; one end of the first supporting shaft with the bevel gear penetrates through the other shaft hole of the two shaft holes on the mounting U-shaped shell and is positioned on the inner side of the mounting U-shaped shell; the roller is arranged on the first supporting shaft and is positioned in a U-shaped groove on the U-shaped shell; both ends of the fourth transmission shaft are provided with bevel teeth; the fourth transmission shaft is arranged on the inner side of the mounting U-shaped shell through a second support; one end of the fourth transmission shaft is meshed with the first support shaft through bevel teeth; the third transmission shaft is arranged on the inner side of the mounting U-shaped shell through a first support; one end of the third transmission shaft is meshed with the other end of the fourth transmission shaft through bevel teeth; one end of the second transmission shaft is provided with bevel teeth; the second transmission shaft is arranged in the shaft hole on the rotating shaft; one end of the second transmission shaft is meshed with the other end of the third transmission shaft through bevel teeth; the limiting cylinder is arranged at the other end of the second transmission shaft and is positioned in the rotating groove; when the roller rotates, the roller can drive the first supporting shaft to rotate; the first supporting shaft rotates to drive the fourth transmission shaft to rotate; the fourth transmission shaft rotates to drive the third transmission shaft to rotate; the third transmission shaft rotates to drive the second transmission shaft to rotate; the second transmission shaft rotates to drive the limiting cylinder to rotate; in the rolling process of the roller, if the rotating direction of the roller is changed, the roller can drive the installation U-shaped shell and the rotating shaft to rotate around the axis of the rotating shaft.

The function of the compression spring in the invention is to keep the corresponding U-shaped driving plate in contact with the cam all the time.

When people use the sickbed designed by the invention, the fourth rotating shaft can be rotated by the movement of the driving rod no matter the user pushes forwards, pulls backwards or pulls obliquely or pushes the trigger driving rod; when the fourth rotating shaft rotates, the fourth rotating shaft drives the seventh rotating shaft to rotate; the seventh rotating shaft can drive the cam to rotate when rotating; the cam rotates to push the corresponding U-shaped driving plate to move towards one side far away from the limiting cylinder; the U-shaped driving plate moves to drive the telescopic inner rods in the two corresponding telescopic connections to move towards one side far away from the limiting cylinder; the two telescopic inner rods move towards one side far away from the limiting cylinder, so that the two arc-shaped friction plates lose the extrusion effect of the corresponding driving springs on the two arc-shaped friction plates. At the moment, the two arc-shaped friction plates lose the constraint on the limiting cylinder and the rotating shaft; namely, the rotating shaft and the second transmission shaft can rotate freely; namely, the roller can rotate freely; namely, the sickbed can be normally used. When the user wants to stop the sickbed, the driving of the trigger driving rod is stopped at the moment, and the trigger driving rod is restored to the original position under the combined action of the corresponding compression spring and the limiting spring; namely, the adjusting block is restored to the original position; namely, the corresponding cam is restored to the original position; at the moment, the corresponding arc-shaped friction plate plays a role in limiting the corresponding limiting cylinder and the corresponding rotating shaft under the action of the corresponding driving spring; the rotating shaft and the second transmission shaft lose rotating function; namely the roller loses the rotation function; i.e. the patient bed is at rest at this time.

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 structural view of the trigger mechanism.

Fig. 4 is a schematic view of the internal structure of the trigger mechanism.

Fig. 5 is a schematic diagram of trigger block installation.

Fig. 6 is a schematic structural view of the trigger mounting structure.

Fig. 7 is a schematic view of the first channel distribution.

FIG. 8 is a schematic view of the support block configuration.

Fig. 9 is a schematic view of the structure of the regulating block.

Fig. 10 is a schematic view of the second gear and the first gear in cooperation.

Fig. 11 is a first gear mounting schematic.

Fig. 12 is a second gear mounting schematic.

Fig. 13 is a fifth gear mounting schematic.

Fig. 14 is an external view of the self-locking mechanism.

Fig. 15 is a schematic view of the internal structure of the self-locking mechanism.

Fig. 16 is an installation schematic diagram of the internal structure of the self-locking mechanism.

Fig. 17 is a schematic view of the installation of the rotating shaft.

FIG. 18 is a schematic view of the ring guide installation.

Fig. 19 is a schematic view of the support bar structure.

FIG. 20 is a schematic view of a roller mounting.

Figure 21 is a schematic view of the mounting of the spacing cylinder.

FIG. 22 is a fourth driveshaft installation schematic.

FIG. 23 is a schematic view of an arc friction plate and a spacing cylinder.

Fig. 24 is a schematic view of a mounting collar shell construction.

FIG. 25 is a schematic view of an arcuate friction plate installation.

Fig. 26 is a schematic view of a telescopic connection structure.

Number designation in the figures: 1. a trigger mechanism; 2. a sickbed body; 3. a self-locking mechanism; 4. a support block; 5. a stop lever; 6. triggering the mounting structure; 7. triggering the driving rod; 8. a guide block; 9. a trigger block; 10. an adjusting block; 11. a compression spring; 12. a second gear; 13. a third gear; 14. a fourth gear; 15. a fifth gear; 16. a first gear; 17. an arcuate connection; 18. mounting blocks; 19. a first notch; 20. a first guide groove; 21. installing a guide groove; 22. a mounting cavity; 23. a guide groove; 24. a first guide block; 25. a connecting plate; 26. a first rack; 27. a first trigger spring; 28. a second trigger spring; 29. a second rotating shaft; 30. a third rotating shaft; 31. a fourth rotating shaft; 32. a fifth rotating shaft; 33. a first rotating shaft; 34. a first slider; 35. a second slider; 36. a support bar; 37. installing a ring shell; 38. installing a U-shaped shell; 39. a roller; 40. a rotating shaft; 41. a first drive shaft; 42. a second drive shaft; 43. a limiting cylinder; 44. telescopic connection; 45. a U-shaped drive plate; 46. a compression spring; 47. a cam; 48. an arc-shaped friction plate; 49. an annular guide block; 50. a rotating groove; 51. a shaft hole; 52. an annular guide groove; 53. a friction plate avoidance groove; 54. a third drive shaft; 55. a first support shaft; 56. a first support; 57. a fourth drive shaft; 58. a second support; 59. mounting holes; 60. a third support; 61. a seventh rotating shaft; 62. a telescopic outer sleeve; 63. a telescopic inner rod; 64. a drive spring; 86. and a limiting spring.

Detailed Description

As shown in fig. 1 and 2, the self-locking sickbed comprises a trigger mechanism 1, a sickbed body 2 and a self-locking mechanism 3, wherein the trigger mechanism 1 is arranged on the upper side of a baffle at one end of the sickbed body 2; four self-locking mechanisms 3 are respectively arranged at four corners of the lower side surface of the sickbed body 2.

As shown in fig. 3, the triggering mechanism 1 includes a supporting block 4, a stop lever 5, a triggering installation structure 6, a triggering driving rod 7, a guide block 8, a triggering block 9, an adjusting block 10, a compression spring 11, a first gear 16, a guide groove 23, a first guide groove 20, an installation cavity 22, a first guide block 24, a connecting plate 25, a first rack 26, a first rotating shaft 33, a first notch 19, a second gear 12, a third gear 13, a fourth gear 14, a fifth gear 15, an installation guide groove 21, a first triggering spring 27, a second triggering spring 28, a second rotating shaft 29, a third rotating shaft 30, a fourth rotating shaft 31, a fifth rotating shaft 32, a first slider 34, a second slider 35, and a limiting spring 86, wherein as shown in fig. 8, one end of the supporting block 4 is provided with a through guide groove 23; the two supporting blocks 4 are respectively arranged on the two sides of the upper end of the baffle plate on one side of the sickbed body 2; the two stop rods 5 are uniformly arranged between the two supporting blocks 4 and are close to the bed board on the sickbed body 2; as shown in fig. 6, the trigger mounting structure 6 is composed of an arcuate connection 17 and two mounting blocks 18, wherein the two mounting blocks 18 are respectively mounted at two ends of the arcuate connection 17; the trigger mounting structure 6 is mounted at the upper ends of the two supporting blocks 4; and two mounting blocks 18 in the trigger mounting structure 6 are respectively positioned at two sides of the two supporting blocks 4; as shown in fig. 7, an installation cavity 22 is formed on the inner side of one installation block 18 of the two installation blocks 18, a first notch 19 is formed on one side end surface of the installation block 18 close to the corresponding support block 4, the first notch 19 is matched with a guide groove 23 on the corresponding support block 4, two first guide grooves 20 are symmetrically formed on the upper end surface and the lower end surface of the installation cavity 22 of the installation block 18 close to the first notch 19, and two installation guide grooves 21 are formed on the lower end surface of the installation cavity 22 of the installation block 18 far from the first notch 19; one end of the trigger block 9 is provided with an inclined plane; as shown in fig. 4, one end of the trigger driving rod 7 is provided with a guide block 8, and the other end of the trigger driving rod 7 is provided with a trigger block 9; the trigger driving rod 7 is arranged on the two supporting blocks 4 through the matching of the guide block 8 and the trigger block 9 with the guide grooves 23 on the two supporting blocks 4; a limiting spring 86 is respectively arranged between two side surfaces of the guide block 8 and two side surfaces of the first guide groove 20 on the corresponding support block 4; a limiting spring 86 is respectively arranged between two side surfaces of the trigger block 9 and two side surfaces of the first guide groove 20 on the corresponding supporting block 4; the adjusting block 10 is provided with an inclined plane; as shown in fig. 9, two first guide blocks 24 are symmetrically installed on both sides of the adjusting block 10; as shown in fig. 5, the adjusting block 10 is mounted in the mounting cavity 22 of the corresponding mounting block 18 through the cooperation of the two first guide blocks 24 and the two first guide grooves 20 on the mounting block 18; the inclined plane on the adjusting block 10 is matched with the inclined plane on the trigger block 9; as shown in fig. 9, one end of the connecting plate 25 is mounted on the side of the adjusting block 10 having no end with a slope; the other end of the connecting plate 25 is provided with a first rack 26; a compression spring 11 is arranged between one side of the connecting plate 25, which is far away from the upper inclined plane of the adjusting block 10, and the corresponding side surface of the mounting cavity 22; as shown in fig. 5, one end of the first rotating shaft 33 is mounted on the upper end surface of the mounting cavity 22 on the corresponding mounting block 18; as shown in fig. 11, the first gear 16 is mounted on the first rotating shaft 33; as shown in fig. 10, the first gear 16 is engaged with the first rack 26; as shown in fig. 13, a second slider 35 is mounted at one end of the fifth rotating shaft 32; the fifth rotating shaft 32 is installed in the installation cavity 22 on the corresponding installation block 18 through the matching of the second sliding block 35 and the installation guide groove 21 in the corresponding installation block 18; a second trigger spring 28 is arranged between the second slide block 35 and the corresponding installation guide groove 21; the fifth gear 15 is mounted on the fifth rotating shaft 32; as shown in fig. 11, the fifth gear 15 is engaged with the first gear 16; as shown in fig. 12, a first slider 34 is mounted on one end of the second rotating shaft 29; the second rotating shaft 29 is installed in the installation cavity 22 on the corresponding installation block 18 through the matching of the first sliding block 34 and the installation guide groove 21 in the corresponding installation block 18; a first trigger spring 27 is arranged between the first slide block 34 and the corresponding installation guide groove 21; the second gear 12 is mounted on the second rotating shaft 29; the second gear 12 is engaged with the first gear 16; as shown in fig. 11, the third rotating shaft 30 is installed in the installation cavity 22 of the corresponding installation block 18; the third gear 13 is mounted on the third rotating shaft 30; the third gear 13 is matched with the second gear 12; the upper end of the fourth rotating shaft 31 is arranged on the upper end surface of the mounting cavity 22 on the corresponding mounting block 18; the fourth gear 14 is mounted on the fourth rotating shaft 31; as shown in fig. 10, the fourth gear 14 is meshed with the third gear 13; the fourth gear 14 is engaged with the fifth gear 15.

As shown in fig. 14, the self-locking mechanism 3 includes a support rod 36, a mounting ring housing 37, a mounting U-shaped housing 38, a roller 39, a rotating shaft 40, a first transmission shaft 41, a second transmission shaft 42, a limiting cylinder 43, a telescopic connection 44, a U-shaped driving plate 45, a pressing spring 46, an arc-shaped friction plate 48, an annular guide block 49, a rotating groove 50, a shaft hole 51, an annular guide groove 52, a friction plate avoiding groove 53, a third transmission shaft 54, a first support shaft 55, a first support 56, a fourth transmission shaft 57, a second support 58, a mounting hole 59, a cam 47, a seventh rotating shaft 61, and a third support 60, wherein as shown in fig. 19, the lower end of the support rod 36 is provided with the rotating groove 50; two friction plate avoiding grooves 53 are formed on the inner circular surface of the upper side of the rotating groove 50; the two friction plate avoiding grooves 53 are uniformly distributed up and down; the inner circular surface of the lower side of the rotating groove 50 is provided with a circular guide groove 52; as shown in fig. 1, the upper end of the support rod 36 is mounted on the lower end surface of the hospital bed body 2; as shown in fig. 18, the rotating shaft 40 has a shaft hole 51 passing through the center thereof; an annular guide block 49 is arranged on the outer circular surface of the rotating shaft 40; as shown in fig. 17, the rotating shaft 40 is mounted on the lower end of the support bar 36 by the engagement of the annular guide block 49 with the annular guide groove 52; as shown in fig. 22, the U-shaped groove of the mounting U-shaped housing 38 has two shaft holes 51 symmetrically therein; the two shaft holes 51 are communicated with the inner side of the mounting U-shaped shell 38; as shown in fig. 20, a mounting U-shaped housing 38 is mounted on the lower end of the rotating shaft 40; as shown in fig. 22, one end of the first support shaft 55 has a tapered tooth; one end of the first support shaft 55, which is not provided with the bevel teeth, is mounted in one 51 of the two shaft holes 51 on the mounting U-shaped shell 38; one end of the first supporting shaft 55 with the conical teeth penetrates through the other shaft hole 51 of the two shaft holes 51 on the mounting U-shaped shell 38 and is positioned inside the mounting U-shaped shell 38; as shown in fig. 21, the roller 39 is mounted on the first support shaft 55, and the roller 39 is located in a U-shaped groove on the mounting U-shaped housing 38; both ends of the fourth transmission shaft 57 are provided with bevel teeth; as shown in fig. 22, the fourth transmission shaft 57 is mounted inside the mounting U-shaped housing 38 through the second support 58; one end of the fourth transmission shaft 57 is meshed with the first support shaft 55 through bevel teeth; a third drive shaft 54 is mounted inside the mounting U-shaped housing 38 by a first support 56; one end of the third transmission shaft 54 is engaged with the other end of the fourth transmission shaft 57 through bevel teeth; one end of the second transmission shaft 42 has a bevel gear; the second transmission shaft 42 is installed in the shaft hole 51 on the rotating shaft 40; one end of the second transmission shaft 42 is meshed with the other end of the third transmission shaft 54 through bevel teeth; as shown in fig. 23, a limiting cylinder 43 is installed at the other end of the second transmission shaft 42, and the limiting cylinder 43 is located in the rotation groove 50; as shown in fig. 24, two mounting holes 59 are formed on the inner circumferential surface of the outer side of the mounting ring housing 37, and the two mounting holes 59 are uniformly distributed up and down; the mounting ring case 37 is mounted on the outer circumferential surface of the lower side of the support rod 36; the two mounting holes 59 on the mounting ring shell 37 are matched with the two friction plate avoiding grooves 53 on the support rod 36; as shown in fig. 25, two telescopic links 44 are symmetrically mounted on one side of the U-shaped drive plate 45; the U-shaped driving plate 45 is installed on the inner side of the mounting ring shell 37 through the matching of the two telescopic connections 44 and the corresponding two mounting holes 59 on the mounting ring shell 37; an extrusion spring 46 is arranged between the other side of the U-shaped driving plate 45 and the inner circular surface of the mounting ring shell 37; the two arc-shaped friction plates 48 are respectively arranged on the end surfaces of the two telescopic connections 44 far away from the U-shaped driving plate 45; the two arc-shaped friction plates 48 are matched with the two corresponding friction plate avoiding grooves 53 on the support rod 36; as shown in fig. 15 and 16, two arc-shaped friction plates 48 are respectively matched with the limiting cylinder 43 and the rotating shaft 40; the seventh rotating shaft 61 is installed in the mounting ring housing 37 through the third support 60; the cam 47 is mounted on the seventh rotating shaft 61; the cam 47 engages one side of the U-shaped slot in the U-shaped drive plate 45.

The guide direction of the installation guide groove 21 corresponding to the fifth gear 15 is perpendicular to the central connection of the first gear 16 and the fifth gear 15; the guide direction of the mounting guide groove 21 corresponding to the second gear 12 is perpendicular to the center connection of the first gear 16 and the second gear 12.

The fourth rotating shaft 31 is connected with the seventh rotating shaft 61 through a flexible shaft.

As shown in fig. 26, the telescopic link 44 comprises a telescopic sheath 62, a telescopic inner rod 63 and a driving spring 64, wherein one end of the telescopic inner rod 63 is mounted on the U-shaped driving plate 45; one end of the telescopic outer sleeve 62 is nested and arranged at the other end of the telescopic inner rod 63; a driving spring 64 is arranged between the telescopic inner rod 63 arranged at the inner side of the telescopic outer sleeve 62 and the inner end surface of the telescopic outer sleeve 62; the other end of the telescoping outer sleeve 62 mounts the arcuate friction plate 48.

The trigger block 9 and the adjusting block 10 are in a balanced state under the common elastic force of the two limit springs 86 and the compression spring 11 in the initial state.

The annular guide blocks 49 and the corresponding annular guide grooves 52 are mounted through bearings.

The limiting spring 86 is a compressible and stretchable spring; the function of the device is to play a role in returning the trigger driving rod 7.

In summary, the following steps:

the sickbed designed by the invention can control the locking state of the sickbed roller 39 by identifying the stress state of the push rod on the sickbed, thereby controlling the movement and the stop of the sickbed.

Two supporting blocks 4 are respectively arranged on two sides of the upper end of a baffle on one side of a sickbed body 2; the two stop rods 5 are uniformly arranged between the two supporting blocks 4 and are close to the bed board on the sickbed body 2; the trigger mounting structure 6 is mounted at the upper ends of the two supporting blocks 4; one end of the trigger block 9 is provided with an inclined plane; one end of the trigger driving rod 7 is provided with a guide block 8, and the other end of the trigger driving rod 7 is provided with a trigger block 9; the trigger driving rod 7 is arranged on the two supporting blocks 4 through the matching of the guide block 8 and the trigger block 9 with the guide grooves 23 on the two supporting blocks 4; the adjusting block 10 is provided with an inclined plane; the adjusting block 10 is installed in the installation cavity 22 on the corresponding installation block 18 through the matching of the two first guide blocks 24 and the two first guide grooves 20 on the installation block 18; a limiting spring 86 is respectively arranged between two side surfaces of the guide block 8 and two side surfaces of the first guide groove 20 on the corresponding support block 4; a limiting spring 86 is respectively arranged between two side surfaces of the trigger block 9 and two side surfaces of the first guide groove 20 on the corresponding supporting block 4; the inclined plane on the adjusting block 10 is matched with the inclined plane on the trigger block 9; one end of the connecting plate 25 is arranged on the adjusting block 10; the other end of the connecting plate 25 is provided with a first rack 26; a compression spring 11 is arranged between one side of the connecting plate 25, which is far away from the upper inclined plane of the adjusting block 10, and the corresponding side surface of the mounting cavity 22; one end of the first rotating shaft 33 is installed on the upper end face of the installation cavity 22 on the corresponding installation block 18; the first gear 16 is mounted on the first rotating shaft 33; the first gear 16 is engaged with the first rack 26; a second slide block 35 is installed at one end of the fifth rotating shaft 32; the fifth rotating shaft 32 is installed in the installation cavity 22 on the corresponding installation block 18 through the matching of the second sliding block 35 and the installation guide groove 21 in the corresponding installation block 18; a second trigger spring 28 is arranged between the second slide block 35 and the corresponding installation guide groove 21; the fifth gear 15 is mounted on the fifth rotating shaft 32; the fifth gear 15 cooperates with the first gear 16; a first slide block 34 is installed at one end of the second rotating shaft 29; the second rotating shaft 29 is installed in the installation cavity 22 on the corresponding installation block 18 through the matching of the first sliding block 34 and the installation guide groove 21 in the corresponding installation block 18; a first trigger spring 27 is arranged between the first slide block 34 and the corresponding installation guide groove 21; the second gear 12 is mounted on the second rotating shaft 29; the second gear 12 is engaged with the first gear 16; the third rotating shaft 30 is arranged in the mounting cavity 22 on the corresponding mounting block 18; the third gear 13 is mounted on the third rotating shaft 30; the third gear 13 is matched with the second gear 12; the upper end of the fourth rotating shaft 31 is arranged on the upper end surface of the mounting cavity 22 on the corresponding mounting block 18; the fourth gear 14 is mounted on the fourth rotating shaft 31; the fourth gear 14 is meshed with the third gear 13; the fourth gear 14 cooperates with a fifth gear 15; in the initial state, the trigger block 9 and the adjusting block 10 are in a balanced state under the common elastic force of the two corresponding limiting springs 86 and the compression spring 11. When the trigger driving rod 7 is pushed forwards, the trigger driving rod 7 drives the trigger block 9 to move forwards along the first guide groove 20 on the corresponding supporting block 4; the trigger block 9 moves forwards to push the adjusting block 10 to move forwards; the forward movement of the adjusting block 10 drives the connecting plate 25 to move forward; the connecting plate 25 moves forward to drive the first rack 26 to move forward; the forward movement of the first rack 26 causes the first gear 16 to rotate; the rotation of the first gear 16 drives the second gear 12 to rotate; the second gear 12 rotates to drive the third gear 13 to rotate; the third gear 13 rotates to drive the fourth gear 14 to rotate; the fourth gear 14 rotates to drive the fourth rotating shaft 31 to rotate; when the trigger driving rod 7 is pulled backwards, the trigger driving rod 7 drives the trigger block 9 to move backwards along the first guide groove 20 on the corresponding supporting block 4; during the backward movement of the trigger block 9, the adjusting block 10 moves backward under the action of the compression spring 11; the backward movement of the adjusting block 10 drives the connecting plate 25 to move backward; the connecting plate 25 moves backwards to drive the first rack 26 to move backwards; rearward movement of the first rack 26 causes the first gear 16 to rotate; the rotation of the first gear 16 drives the fifth gear 15 to rotate; the fifth gear 15 rotates to drive the fourth gear 14 to rotate; the fourth gear 14 rotates to drive the fourth rotating shaft 31 to rotate; when the trigger driving rod 7 is pushed towards one side of the adjusting block 10, the trigger driving block drives the trigger block 9 to move towards one side provided with the adjusting block 10; the trigger block 9 moves towards the side where the adjusting block 10 is installed, so that the adjusting block 10 moves forwards under the matching of the first guide block 24 and the first guide groove 20; the forward movement of the adjusting block 10 drives the connecting plate 25 to move forward; the connecting plate 25 moves forward to drive the first rack 26 to move forward; the forward movement of the first rack 26 causes the first gear 16 to rotate; the rotation of the first gear 16 drives the second gear 12 to rotate; the second gear 12 rotates to drive the third gear 13 to rotate; the third gear 13 rotates to drive the fourth gear 14 to rotate; the fourth gear 14 rotates to drive the fourth rotating shaft 31 to rotate; when the trigger driving rod 7 is pulled by a side far away from the adjusting block 10, the trigger driving block drives the trigger block 9 to move towards the side far away from the side provided with the adjusting block 10; the trigger block 9 moves towards the side far away from the side where the adjusting block 10 is installed, so that the adjusting block 10 moves backwards under the cooperation of the first guide block 24 and the first guide groove 20; the backward movement of the adjusting block 10 drives the connecting plate 25 to move backward; the connecting plate 25 moves backwards to drive the first rack 26 to move backwards; rearward movement of the first rack 26 causes the first gear 16 to rotate; the rotation of the first gear 16 drives the fifth gear 15 to rotate; the fifth gear 15 rotates to drive the fourth gear 14 to rotate; the fourth gear 14 rotates to drive the fourth rotating shaft 31 to rotate. When the first gear 16 drives the fifth gear 15 to rotate, the first gear 16 will apply a pressing force to the second gear 12, so that the second gear 12 drives the second rotating shaft 29 to move along the corresponding installation guide slot 21 toward the side away from the first gear 16; disengaging the second gear 12 from the first gear 16 and the third gear 13; i.e., when the rotation of fourth gear 14 does not adversely affect the rotation of first gear 16; when the first gear 16 drives the second gear 12 to rotate, the first gear 16 will apply a pressing force to the fifth gear 15, so that the fifth gear 15 drives the fifth rotating shaft 32 to move along the corresponding installation guide slot 21 toward the side away from the first gear 16; disengaging the fifth gear 15 from the first gear 16 and the fourth gear 14; i.e., when the rotation of fourth gear 14 does not adversely affect the rotation of first gear 16.

Two telescopic connections 44 are symmetrically arranged on one side of a U-shaped driving plate 45; the U-shaped driving plate 45 is installed on the inner side of the mounting ring shell 37 through the matching of the two telescopic connections 44 and the corresponding two mounting holes 59 on the mounting ring shell 37; an extrusion spring 46 is arranged between the other side of the U-shaped driving plate 45 and the inner circular surface of the mounting ring shell 37; the two arc-shaped friction plates 48 are respectively arranged on the end surfaces of the two telescopic connections 44 far away from the U-shaped driving plate 45; the two arc-shaped friction plates 48 are matched with the two corresponding friction plate avoiding grooves 53 on the support rod 36; the two arc-shaped friction plates 48 are respectively matched with the limiting cylinder 43 and the rotating shaft 40; the seventh rotating shaft 61 is installed in the mounting ring housing 37 through the third support 60; the cam 47 is mounted on the seventh rotating shaft 61; the cam 47 is matched with one side surface of a U-shaped groove on the U-shaped driving plate 45; the fourth rotating shaft 31 is connected with the seventh rotating shaft 61 through a flexible shaft; when the fourth rotating shaft 31 rotates to drive the seventh rotating shaft 61 to rotate, the seventh rotating shaft 61 drives the cam 47 to rotate; the rotation of the cam 47 pushes the corresponding U-shaped driving plate 45 to move toward the side away from the restraining cylinder 43; the U-shaped driving plate 45 moves to drive the telescopic inner rods 63 in the two corresponding telescopic connections 44 to move towards one side far away from the limiting cylinder 43; the movement of the two telescopic link inner rods 63 to the side away from the stopper cylinder 43 will cause the two arc-shaped friction plates 48 to lose their pressing action of the corresponding drive springs 64.

The upper end of the supporting rod 36 is arranged on the lower side end face of the sickbed body 2; the rotating shaft 40 is arranged at the lower end of the supporting rod 36 through the matching of the annular guide block 49 and the annular guide groove 52; the mounting U-shaped housing 38 is mounted on the lower end of the rotating shaft 40; one end of the first support shaft 55 has a tapered tooth; one end of the first support shaft 55, which is not provided with the bevel teeth, is mounted in one 51 of the two shaft holes 51 on the mounting U-shaped shell 38; one end of the first supporting shaft 55 with the conical teeth penetrates through the other shaft hole 51 of the two shaft holes 51 on the mounting U-shaped shell 38 and is positioned inside the mounting U-shaped shell 38; the roller 39 is mounted on the first support shaft 55, and the roller 39 is positioned in a U-shaped groove on the mounting U-shaped housing 38; both ends of the fourth transmission shaft 57 are provided with bevel teeth; the fourth transmission shaft 57 is mounted inside the mounting U-shaped housing 38 through a second support 58; one end of the fourth transmission shaft 57 is meshed with the first support shaft 55 through bevel teeth; a third drive shaft 54 is mounted inside the mounting U-shaped housing 38 by a first support 56; one end of the third transmission shaft 54 is engaged with the other end of the fourth transmission shaft 57 through bevel teeth; one end of the second transmission shaft 42 has a bevel gear; the second transmission shaft 42 is installed in the shaft hole 51 on the rotating shaft 40; one end of the second transmission shaft 42 is meshed with the other end of the third transmission shaft 54 through bevel teeth; the limiting cylinder 43 is arranged at the other end of the second transmission shaft 42, and the limiting cylinder 43 is positioned in the rotating groove 50; when the roller 39 rotates, the roller 39 drives the first supporting shaft 55 to rotate; the first supporting shaft 55 rotates to drive the fourth transmission shaft 57 to rotate; the fourth transmission shaft 57 rotates to drive the third transmission shaft 54 to rotate; the third transmission shaft 54 rotates to drive the second transmission shaft 42 to rotate; the second transmission shaft 42 rotates to drive the limiting cylinder 43 to rotate; during the rolling of the roller 39, if the rotation direction of the roller 39 is changed, the roller 39 will drive the mounting U-shaped housing 38 and the rotating shaft 40 to rotate around the axis of the rotating shaft 40.

The compression spring 46 of the present invention functions to keep the corresponding U-shaped drive plate 45 in contact with the cam 39 at all times.

The specific implementation mode is as follows: when people use the hospital bed designed by the invention, no matter the user pushes forwards, pulls backwards or pulls obliquely or pushes the trigger driving rod 7, the fourth rotating shaft 31 can be rotated by the movement of the driving rod; when the fourth rotating shaft 31 rotates, the fourth rotating shaft 31 drives the seventh rotating shaft 61 to rotate; the seventh rotating shaft 61 rotates to drive the cam 47 to rotate; the rotation of the cam 47 pushes the corresponding U-shaped driving plate 45 to move toward the side away from the restraining cylinder 43; the U-shaped driving plate 45 moves to drive the telescopic inner rods 63 in the two corresponding telescopic connections 44 to move towards one side far away from the limiting cylinder 43; the movement of the two telescopic link inner rods 63 to the side away from the stopper cylinder 43 will cause the two arc-shaped friction plates 48 to lose their pressing action of the corresponding drive springs 64. At this time, the two arc friction plates 48 lose the binding of the limiting cylinder 43 and the rotating shaft 40; that is, the rotating shaft 40 and the second transmission shaft 42 can freely rotate; i.e. the roller 39 can rotate freely; namely, the sickbed can be normally used. When the user wants to stop the sickbed, the driving of the trigger driving rod 7 is stopped at the moment, and the trigger driving rod 7 is restored to the original position under the combined action of the corresponding compression spring 11 and the limiting spring 86; namely, the adjusting block 10 is restored to the original position; i.e. the corresponding cam 47 returns to the original position; at this time, under the action of the corresponding driving spring 64, the corresponding arc-shaped friction plate 48 plays a role in limiting the corresponding limiting cylinder 43 and the rotating shaft 40; so that the rotating shaft 40 and the second transmission shaft 42 lose the rotating function; i.e. the roller 39 loses its rotation function; i.e. the patient bed is at rest at this time.

Claims (5)

1. The utility model provides a self-locking sick bed that medical treatment was used based on become direction transmission which characterized in that: the sickbed comprises a trigger mechanism, a sickbed body and a self-locking mechanism, wherein the trigger mechanism is arranged on the upper side of a baffle at one end of the sickbed body; the four self-locking mechanisms are respectively arranged at four corners of the lower side surface of the sickbed body;

the trigger mechanism comprises a supporting block, a stop lever, a trigger mounting structure, a trigger driving rod, a guide block, a trigger block, a regulating block, a compression spring, a first gear, a guide groove, a first guide groove, a mounting cavity, a first guide block, a connecting plate, a first rack, a first rotating shaft, a first gap, a second gear, a third gear, a fourth gear, a fifth gear, a mounting guide groove, a first trigger spring, a second rotating shaft, a third rotating shaft, a fourth rotating shaft, a fifth rotating shaft, a first sliding block, a second sliding block and a limiting spring, wherein one end of the supporting block is provided with a through guide groove; the two supporting blocks are respectively arranged on two sides of the upper end of a baffle plate on one side of the sickbed body; the two stop rods are uniformly arranged between the two supporting blocks and are close to the bed plate on the sickbed body; the trigger mounting structure consists of an arched connection and two mounting blocks, wherein the two mounting blocks are respectively mounted at two ends of the arched connection; the trigger mounting structure is mounted at the upper ends of the two supporting blocks; two mounting blocks in the trigger mounting structure are respectively positioned at two sides of the two supporting blocks; the inner side of one of the two mounting blocks is provided with a mounting cavity, the end surface of one side of the mounting block, which is close to the corresponding supporting block, is provided with a first notch, the first notch is matched with the guide groove on the corresponding supporting block, the upper end surface and the lower end surface of one side of the mounting cavity in the mounting block, which is close to the first notch, are symmetrically provided with two first guide grooves, and the lower end surface of one side of the mounting cavity in the mounting block, which is far away from the first notch, is provided with two mounting guide grooves; one end of the trigger block is provided with an inclined plane; one end of the trigger driving rod is provided with a guide block, and the other end of the trigger driving rod is provided with a trigger block; the trigger driving rod is arranged on the two supporting blocks through the matching of the guide block and the trigger block with the guide grooves on the two supporting blocks; a limiting spring is respectively arranged between the two side surfaces of the guide block and the two side surfaces of the first guide groove on the corresponding support block; a limiting spring is respectively arranged between two side surfaces of the trigger block and two side surfaces of the first guide groove on the corresponding supporting block; the adjusting block is provided with an inclined plane; two first guide blocks are symmetrically arranged on two sides of the adjusting block; the adjusting block is arranged in the mounting cavity on the corresponding mounting block through the matching of the two first guide blocks and the two first guide grooves on the mounting block; the inclined plane on the adjusting block is matched with the inclined plane on the triggering block; one end of the connecting plate is arranged on the side surface of the adjusting block which is not provided with the inclined surface; the other end of the connecting plate is provided with a first rack; a compression spring is arranged between one side of the connecting plate, which is far away from the upper inclined plane of the adjusting block, and the corresponding side surface of the mounting cavity; one end of the first rotating shaft is arranged on the upper end surface of the mounting cavity on the corresponding mounting block; the first gear is arranged on the first rotating shaft; the first gear is meshed with the first rack; one end of the fifth rotating shaft is provided with a second sliding block; the fifth rotating shaft is installed in the installation cavity on the corresponding installation block through the matching of the second sliding block and the installation guide groove in the corresponding installation block; a second trigger spring is arranged between the second sliding block and the corresponding installation guide groove; the fifth gear is arranged on the fifth rotating shaft; the fifth gear is matched with the first gear; one end of the second rotating shaft is provided with a first sliding block; the second rotating shaft is arranged in the mounting cavity on the corresponding mounting block through the matching of the first sliding block and the mounting guide groove in the corresponding mounting block; a first trigger spring is arranged between the first sliding block and the corresponding installation guide groove; the second gear is arranged on the second rotating shaft; the second gear is matched with the first gear; the third rotating shaft is arranged in the mounting cavity on the corresponding mounting block; the third gear is arranged on the third rotating shaft; the third gear is matched with the second gear; the upper end of the fourth rotating shaft is arranged on the upper end surface of the mounting cavity on the corresponding mounting block; the fourth gear is arranged on the fourth rotating shaft; the fourth gear is meshed with the third gear; the fourth gear is matched with the fifth gear;

the self-locking mechanism comprises a supporting rod, an installation ring shell, an installation U-shaped shell, a roller, a rotating shaft, a first transmission shaft, a second transmission shaft, a limiting cylinder, a telescopic connection, a U-shaped driving plate, an extrusion spring, an arc-shaped friction plate, an annular guide block, a rotating groove, a shaft hole, an annular guide groove, a friction plate avoiding groove, a third transmission shaft, a first supporting shaft, a first support, a fourth transmission shaft, a second support, an installation hole, a cam, a seventh rotating shaft and a third support, wherein the lower end of the supporting rod is provided with a rotating groove; two friction plate avoiding grooves are formed in the inner circular surface of the upper side of the rotating groove; the two friction plate avoiding grooves are uniformly distributed up and down; the inner circle surface at the lower side of the rotating groove is provided with an annular guide groove; the upper end of the supporting rod is arranged on the end surface of the lower side of the sickbed body; the center of the rotating shaft is provided with a through shaft hole; the outer circular surface of the rotating shaft is provided with an annular guide block; the rotating shaft is arranged at the lower end of the supporting rod through the matching of the annular guide block and the annular guide groove; two shaft holes are symmetrically arranged in the U-shaped groove for installing the U-shaped shell; the two shaft holes are communicated with the inner side of the mounting U-shaped shell; the mounting U-shaped shell is mounted at the lower end of the rotating shaft; one end of the first supporting shaft is provided with a bevel gear; one end of the first supporting shaft, which is not provided with the bevel gear, is arranged in one of the two shaft holes on the installation U-shaped shell; one end of the first supporting shaft with the bevel gear penetrates through the other shaft hole of the two shaft holes on the mounting U-shaped shell and is positioned on the inner side of the mounting U-shaped shell; the roller is arranged on the first supporting shaft and is positioned in a U-shaped groove on the U-shaped shell; both ends of the fourth transmission shaft are provided with bevel teeth; the fourth transmission shaft is arranged on the inner side of the mounting U-shaped shell through a second support; one end of the fourth transmission shaft is meshed with the first support shaft through bevel teeth; the third transmission shaft is arranged on the inner side of the mounting U-shaped shell through a first support; one end of the third transmission shaft is meshed with the other end of the fourth transmission shaft through bevel teeth; one end of the second transmission shaft is provided with bevel teeth; the second transmission shaft is arranged in the shaft hole on the rotating shaft; one end of the second transmission shaft is meshed with the other end of the third transmission shaft through bevel teeth; the limiting cylinder is arranged at the other end of the second transmission shaft and is positioned in the rotating groove; two mounting holes are formed in the inner circular surface of the outer side of the mounting ring shell, and the two mounting holes are uniformly distributed up and down; the mounting ring shell is mounted on the outer circular surface of the lower side of the supporting rod; two mounting holes on the mounting ring shell are matched with two friction plate avoiding grooves on the supporting rod; two telescopic connections are symmetrically arranged on one side of the U-shaped driving plate; the U-shaped driving plate is arranged on the inner side of the mounting ring shell in a matching way with the two corresponding mounting holes on the mounting ring shell through two telescopic connections; an extrusion spring is arranged between the other side of the U-shaped driving plate and the inner circular surface of the mounting ring shell; the two arc-shaped friction plates are respectively arranged on the end surfaces of the two telescopic connectors far away from one side of the U-shaped driving plate; the two arc-shaped friction plates are matched with the two corresponding friction plate avoiding grooves on the supporting rod; the two arc-shaped friction plates are respectively matched with the limiting cylinder and the rotating shaft; the seventh rotating shaft is arranged in the mounting ring shell through a third support; the cam is arranged on the seventh rotating shaft; the cam is matched with one side surface of a U-shaped groove on the U-shaped driving plate;

the guide direction of the installation guide groove corresponding to the fifth gear is mutually vertical to the central connection of the first gear and the fifth gear; the guide direction of the installation guide groove corresponding to the second gear is mutually vertical to the center connection of the first gear and the second gear;

the fourth rotating shaft and the seventh rotating shaft are connected through a flexible shaft.

2. The self-locking hospital bed for medical use based on variable direction transmission of claim 1, wherein: the telescopic connection comprises a telescopic outer sleeve, a telescopic inner rod and a driving spring, wherein one end of the telescopic inner rod is arranged on the U-shaped driving plate; one end of the telescopic outer sleeve is nested and arranged at the other end of the telescopic inner rod; a driving spring is arranged between the telescopic inner rod arranged at the inner side of the telescopic outer sleeve and the inner end surface of the telescopic outer sleeve; the other end of the telescopic outer sleeve is provided with an arc-shaped friction plate.

3. The self-locking hospital bed for medical use based on variable direction transmission of claim 1, wherein: in the initial state, the trigger block and the adjusting block are in a balanced state under the common elasticity of the two corresponding limiting springs and the compression spring.

4. The self-locking hospital bed for medical use based on variable direction transmission of claim 1, wherein: the annular guide blocks and the corresponding annular guide grooves are mounted through bearings.

5. The self-locking hospital bed for medical use based on variable direction transmission of claim 1, wherein: the limiting spring is a compressible and stretchable spring.

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