CN217328338U

CN217328338U - Special climbing mechanism of medical instrument

Info

Publication number: CN217328338U
Application number: CN202221440710.2U
Authority: CN
Inventors: 于士祥; 李�根; 李宁
Original assignee: Hebei Demai Transmission Machinery Co ltd
Current assignee: Hebei Demai Transmission Machinery Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-08-30
Anticipated expiration: 2032-06-10

Abstract

The utility model relates to a climbing mechanism field especially relates to a special climbing mechanism of medical instrument. The lifting device comprises a driving part, a transmission part and a lifting part. The driving part comprises a motor and a speed reducer which are matched with each other. The transmission part comprises a driving bevel gear, a driven bevel gear, a transition flange, a machine cover, a shell, an outer protective cylinder, a front supporting seat, a transmission nut, a transmission shaft sleeve, a protective cylinder sleeve and a protective cylinder. The jacking portion comprises a transmission screw rod and a jacking head. The utility model discloses an increase the effective stroke length of transmission lead screw accounts for the ratio on the climbing mechanism overall length to reduce climbing mechanism's installation space, reduce equipment volume and weight, reduce equipment and become. The transmission screw rod is a single-head trapezoidal screw rod and can be self-locked. The safety and the reliability of the use are improved. The distributed machines can be without band-type brakes. Further reducing the cost of the product.

Description

Special climbing mechanism of medical instrument

Technical Field

The utility model relates to a climbing mechanism field especially relates to a special climbing mechanism of medical instrument.

Background

At present, in medical equipment with the function of driving a bed body to lift, a lifting mechanism mainly adopts a scissor fork form. Because this structure is a laborious structure, the stroke can be saved. Thereby reducing the installation space of the corresponding jacking mechanism. In the prior art, a relatively large number of actuating mechanisms are used as the return type servo electric cylinder. When the servo electric cylinder works, the position of the screw rod is fixed and only rotates and does not move. The stroke is limited by the length of the whole screw rod which is not occupied by other matching. And the sizes of matching parts such as a synchronizing wheel, a bearing, a check ring, a locking nut, a transmission nut, a guide head and the like are subtracted from the length of the whole lead screw when the stroke is calculated. And accounting, wherein the effective stroke length only accounts for about 35-40% of the total length of the servo electric cylinder. Resulting in a bulky apparatus and increased processing costs. In addition, a transmission screw of the servo electric cylinder is generally a ball screw and cannot be self-locked. The matched servo motor must be provided with a band-type brake, and the production cost is further increased.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the background art, the jacking mechanism special for the medical instrument is provided. The utility model discloses an increase the effective stroke length of transmission lead screw accounts for the ratio on the climbing mechanism overall length to reduce climbing mechanism's installation space, reduce equipment volume and weight, reduce equipment and become. The transmission screw rod is a single-head trapezoidal screw rod and can be self-locked. The safety and the reliability of the use are improved. The distributed machines can be without band-type brakes. Further reducing the cost of the product.

The utility model provides a special climbing mechanism of medical instrument, including drive division, transmission portion and jacking portion. The driving part comprises a motor and a speed reducer which are matched with each other. The transmission part comprises a driving bevel gear, a driven bevel gear, a transition flange, a machine cover, a shell, an outer protective cylinder, a front support seat, a transmission nut, a transmission shaft sleeve, a protective cylinder sleeve and a protective cylinder; the front supporting seat, the outer protecting cylinder, the transition flange, the machine cover, the shell, the protecting cylinder sleeve and the protecting cylinder are sequentially connected from top to bottom to form a transmission chamber; the transmission shaft sleeve is rotatably arranged in the transmission chamber; the driven bevel gear is in bonded connection with the lower end of the transmission shaft sleeve; the driving bevel gear is in bonded connection with a speed reducing end of the speed reducer, extends into the transmission chamber and is meshed with the driven bevel gear; the transmission nut is arranged at the upper end of the transmission shaft sleeve; is rotatably connected with the front supporting seat. The jacking part comprises a transmission screw rod and a jacking head; the transmission screw rod is rotatably arranged in the transmission shaft sleeve, and the upper end of the transmission screw rod is in threaded fit with the transmission nut; the jacking head extends out of the transmission chamber, the lower end of the jacking head is connected with the top of the transmission screw rod, and the upper end of the jacking head is provided with an inner hole connected with an external pin shaft piece.

Preferably, the speed reducer is a corner planetary speed reducer and is connected with the driving bevel gear through a flat key.

Preferably, the front end of the driving bevel gear is provided with a retainer ring, the retainer ring and the driving bevel gear are connected through a countersunk hexagon socket head cap screw, and the rear end of the driving bevel gear is provided with an adjusting washer.

Preferably, the driven bevel gear is connected with the driving shaft sleeve through a double flat key.

Preferably, the jacking head is fixedly connected with the upper end of the transmission screw rod through a fine thread and a set screw.

Preferably, the front support seat is provided with an inner hole; the lower end of the inner hole is provided with a first bearing position and a groove; a deep groove ball bearing is arranged on the first bearing position; the transmission nut is rotationally connected with the front support seat through a deep groove ball bearing; a dustproof ring is arranged on the groove; the upper end of the inner hole is inlaid with a graphite copper sleeve; the graphite copper sleeve is in clearance fit with the transmission screw rod, and the clearance is 0.05-0.1 mm.

Preferably, the upper end of the transmission nut is provided with a boss with a first optical axis; the first optical axis is in clearance fit with the deep groove ball bearing, and the clearance is 0.03-0.05 mm; the lower end of the transmission nut is provided with a spigot matched with the transmission shaft sleeve and is connected with the transmission shaft sleeve through a second hexagon socket screw.

Preferably, the bottom of the transmission shaft sleeve is provided with a bearing position II, and the middle of the transmission shaft sleeve is provided with a bearing position III; a tapered roller bearing I is arranged on the bearing position II; a tapered roller bearing II is arranged on the bearing III; the transmission shaft sleeve is rotatably connected with the shell through one conical roller bearing and is rotatably connected with the cover through the other conical roller bearing.

Preferably, the outer protective cylinder is processed by adopting a standard cylinder barrel, and the outer wall of the cylinder barrel is provided with a heat dissipation groove and 4 oil nozzles; the positions of the oil nozzles correspond to the through holes on the transmission shaft sleeve one by one.

Preferably, the transmission screw rod is a single-head trapezoidal screw rod, and the lower end of the transmission screw rod is provided with a threaded hole and a counter bore; the threaded hole is provided with an inner hexagonal socket head cap screw; and a second optical axis is reserved at the lower end of the transmission screw rod.

Preferably, the bottom of the shell is provided with 4 mounting holes.

Compared with the prior art, the utility model discloses following profitable technological effect has:

firstly, effective stroke length: the utility model discloses power take off mode adopts the driving sleeve to drive the drive nut rotatory for the concertina movement is to the transmission lead screw. The effective utilization length of the transmission screw rod is the total length of the trapezoidal thread part minus the length of the front support seat, the transmission nut and the optical axis II at the tail end of the transmission screw rod. The effective stroke can reach more than 60% in the size of the cylinder body. This is incomparable with electric servo cylinders, which account for only about 35% -40% of the time. The long effective stroke means that the total length of the cylinder can be reduced compared with other products under the same stroke requirement, so that the volume and the weight of the equipment are obviously reduced, and the cost of the medical equipment is reduced.

Secondly, the safety factor is high: the transmission screw rod adopts a single-head trapezoidal screw rod and can be self-locked under certain impact and vibration. And the jacking mechanism is internally provided with a mechanical hard limit, so that the transmission screw rod can be prevented from being separated in the process of walking, and the jacking mechanism has enough reliability and safety.

Thirdly, the maintenance is convenient: the jacking mechanism is basically a maintenance-free product and only needs to be added with lubricating grease regularly. The outer protective cylinder and the shell of the product are provided with a plurality of oil nozzles, so that the working personnel can add lubricating grease in different directions conveniently, and each transmission part can be effectively lubricated.

Drawings

Fig. 1 is a schematic view of an appearance structure of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the present invention.

Reference numerals: 1. jacking a head; 2. a screw rod; 3. a graphite copper sleeve; 4. a front support base; 5. a dust ring; 6. an outer protective cylinder; 7. a drive nut; 8. a nozzle tip; 9. a driving shaft sleeve; 10. a transition flange; 11. a machine cover; 12. a housing; 13. a driven bevel gear; 14. a first tapered roller bearing; 15. a protective sleeve; 16. a protective cylinder; 18. a socket head cap screw; 20. a retainer ring; 21. a drive bevel gear; 22. a countersunk hexagon socket head cap screw I; 23. a speed reducer; 25. a second tapered roller bearing; 26. a second socket head cap screw; 28. a deep groove ball bearing; 29. a motor; 30. and (5) tightening the screw.

Detailed Description

Example one

As shown in fig. 1-2, the jacking mechanism for medical equipment provided by the present invention comprises a driving part, a transmission part and a jacking part. The drive section includes a motor 29 and a reducer 23 that cooperate with each other. The transmission part comprises a driving bevel gear 21, a driven bevel gear 13, a transition flange 10, a machine cover 11, a shell 12, an outer protective sleeve 6, a front support seat 4, a transmission nut 7, a transmission shaft sleeve 9, a protective sleeve 15 and a protective sleeve 16; the front supporting seat 4, the outer protecting cylinder 6, the transition flange 10, the cover 11, the shell 12, the protecting cylinder sleeve 15 and the protecting cylinder 16 are sequentially connected from top to bottom to form a transmission chamber; the transmission shaft sleeve 9 is rotatably arranged in the transmission chamber; the driven bevel gear 13 is connected with the lower end of the transmission shaft sleeve 9 in a bonding way; the driving bevel gear 21 is in linkage connection with a speed reduction end of a speed reducer 23, extends into the transmission chamber and is meshed with the driven bevel gear 13; the transmission nut 7 is arranged at the upper end of the transmission shaft sleeve 9; is rotatably connected with the front supporting seat 4. The jacking part comprises a transmission screw rod 2 and a jacking head 1; the transmission screw rod 2 is rotatably arranged in the transmission shaft sleeve 9, and the upper end of the transmission screw rod is in threaded fit with the transmission nut 7; the jacking head 1 extends out of the transmission chamber, the lower end of the jacking head is connected with the top of the transmission screw rod 2, and the upper end of the jacking head is provided with an inner hole connected with an external pin shaft piece.

Example two

Further, the speed reducer 23 is a corner planetary speed reducer, and is connected to the drive bevel gear 21 by a flat key.

Furthermore, a retainer ring 20 is arranged at the front end of the driving bevel gear 21, the driving bevel gear and the retainer ring are connected through a countersunk hexagon socket head cap screw 22 to limit axial movement of the driving bevel gear, and an adjusting washer is arranged at the rear end of the driving bevel gear 21 to adjust the mounting distance of the gears, so that the gap between the gears is adjusted.

Further, the driven bevel gear 13 is connected with the driving shaft sleeve 9 through a double flat key.

Furthermore, the jacking head 1 is fixedly connected with the upper end of the transmission screw rod 2 through a fine thread and a set screw 30.

Further, the front support 4 is provided with an inner hole; the lower end of the inner hole is provided with a first bearing position and a groove; a deep groove ball bearing 28 is arranged on the first bearing position; the transmission nut 7 is rotationally connected with the front support seat 4 through a deep groove ball bearing 28; the deep groove ball bearing 28 supports the operation of the transmission nut 7. The groove is provided with a dustproof ring 5 for preventing external dust from entering the cylinder body; the upper end of the inner hole is inlaid with a graphite copper sleeve 3; the graphite copper sleeve 3 is in clearance fit with the transmission screw rod 2, the clearance is 0.05-0.1mm, and the graphite copper sleeve guides the movement of the transmission screw rod 2.

Furthermore, a boss with a first optical axis is arranged at the upper end of the transmission nut 7; the first optical axis is in clearance fit with the deep groove ball bearing 28, and the clearance is 0.03-0.05 mm; the lower end of the driving nut 7 is provided with a spigot matched with the driving shaft sleeve 9 and is connected with the driving shaft sleeve 9 through a second hexagon socket head cap screw 26.

Further, a second bearing position is arranged at the bottom of the transmission shaft sleeve 9, and a third bearing position is arranged in the middle of the transmission shaft sleeve; a tapered roller bearing I14 is arranged on the bearing position II; a tapered roller bearing II 25 is arranged on the bearing III; the driving shaft sleeve 9 is rotatably connected with the shell 12 through a first tapered roller bearing 14, and is rotatably connected with the cover 11 through a second tapered roller bearing 25.

Further, the outer protective cylinder 6 is processed by adopting a standard cylinder barrel, and the outer wall of the cylinder barrel is provided with a heat dissipation groove and 4 oil nozzles 8; the positions of the oil nozzles 8 correspond to the through holes on the transmission shaft sleeve 9 one by one; the lubricating grease can smoothly reach the thread of the transmission screw rod 2 when the lubricating grease is filled conveniently.

Further, the transmission screw rod 2 is a single-head trapezoidal screw rod, and a threaded hole and a counter bore are formed in the lower end of the transmission screw rod; the threaded hole is coated with thread glue and then is provided with an inner hexagonal socket head cap screw 18; after the thread glue is solidified, the inner hexagonal socket head cap screw 18 is connected with the transmission screw rod 2, so that a pneumatic wrench is convenient to use when the transmission screw rod 2 is assembled. The lower end of the transmission screw rod 2 is provided with a second optical axis, so that the second optical axis can touch the transmission nut 7 after the transmission screw rod 2 travels, the transmission screw rod 2 is prevented from being separated from the cylinder body, and the mechanical hard limiting is realized.

Further, the bottom of the housing 12 is provided with 4 mounting holes for mounting the jacking mechanism on the equipment.

The working principle of the utility model is as follows: after the motor 29 is powered on, the main shaft drives the speed reducer 23 to rotate as a speed reducer, so that the rotating speed of the driving end is reduced, and the output torque is increased. Then, the drive bevel gear 21 is connected to the reduction gear 23 by a flat key. The driven bevel gear 13 and the drive bevel gear 21 form a gear pair, and the torque is further amplified. The driven bevel gear 13 is connected with the transmission shaft sleeve 9 through a double flat key to drive the transmission shaft sleeve 9 to synchronously run. The tail end of the driving nut 7 is provided with a spigot which is matched with the driving shaft sleeve 9 and is connected with the driving shaft sleeve 9 through a second hexagon socket head cap screw 26. So that the driving nut 7 runs synchronously with the driving sleeve 9. Meanwhile, the transmission screw rod 2 and the transmission nut 7 form a thread pair, and the transmission screw rod 2 correspondingly displaces 1 thread pitch every time the transmission nut 7 rotates for one circle. The lower end of the jacking head 1 is fixedly connected with the transmission screw rod 2 through fine threads and a set screw 30, and the upper end of the jacking head is connected with the pin shaft piece. The quantitative displacement of the pin shaft element driven by the jacking head 1 can be realized by controlling the rotation number and the rotation direction of the main shaft of the motor 29.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made without departing from the gist of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A jacking mechanism special for medical equipment is characterized by comprising a driving part, a transmission part and a jacking part;

the driving part comprises a motor (29) and a speed reducer (23) which are matched with each other;

the transmission part comprises a driving bevel gear (21), a driven bevel gear (13), a transition flange (10), a machine cover (11), a shell (12), an outer protective cylinder (6), a front supporting seat (4), a transmission nut (7), a transmission shaft sleeve (9), a protective cylinder sleeve (15) and a protective cylinder (16); the front supporting seat (4), the outer protecting cylinder (6), the transition flange (10), the machine cover (11), the shell (12), the protecting cylinder sleeve (15) and the protecting cylinder (16) are sequentially connected from top to bottom to form a transmission chamber; the transmission shaft sleeve (9) is rotatably arranged in the transmission chamber; the driven bevel gear (13) is in linkage connection with the lower end of the transmission shaft sleeve (9); the driving bevel gear (21) is in linkage connection with a speed reducing end of a speed reducer (23), extends into the transmission chamber and is meshed with the driven bevel gear (13); the transmission nut (7) is arranged at the upper end of the transmission shaft sleeve (9); is rotationally connected with the front supporting seat (4);

the jacking part comprises a transmission screw rod (2) and a jacking head (1); the transmission screw rod (2) is rotatably arranged in the transmission shaft sleeve (9), and the upper end of the transmission screw rod is in threaded fit with the transmission nut (7); the jacking head (1) extends out of the transmission chamber, the lower end of the jacking head is connected with the top of the transmission screw rod (2), and the upper end of the jacking head is provided with an inner hole connected with an external pin shaft piece.

2. The jacking mechanism special for medical instruments as claimed in claim 1, wherein the reducer (23) is an angular planetary reducer, and is connected with the drive bevel gear (21) through a flat key.

3. The medical equipment dedicated jacking mechanism according to claim 1, wherein the front end of the drive bevel gear (21) is provided with a retainer ring (20), the two are connected through a first countersunk hexagon socket head cap screw (22), and the rear end of the drive bevel gear (21) is provided with an adjusting washer.

4. The jacking mechanism special for the medical instrument, according to claim 1, wherein the driven bevel gear (13) is connected with the driving shaft sleeve (9) through a double flat key.

5. The jacking mechanism special for the medical instrument, according to claim 1, wherein the jacking head (1) is fixedly connected with the upper end of the transmission screw rod (2) through a fine thread and a set screw (30).

6. The jacking mechanism special for medical instruments according to claim 1, wherein the front support seat (4) is provided with an inner hole; the lower end of the inner hole is provided with a first bearing position and a groove; a deep groove ball bearing (28) is arranged on the first bearing position; the transmission nut (7) is rotationally connected with the front supporting seat (4) through a deep groove ball bearing (28); a dustproof ring (5) is arranged on the groove; the upper end of the inner hole is embedded with a graphite copper sleeve (3); the graphite copper sleeve (3) is in clearance fit with the transmission screw rod (2), and the clearance is 0.05-0.1 mm.

7. The jacking mechanism special for the medical instrument as claimed in claim 1, wherein the upper end of the transmission nut (7) is provided with a boss with a first optical axis; the first optical axis is in clearance fit with the deep groove ball bearing (28), and the clearance is 0.03-0.05 mm; the lower end of the transmission nut (7) is provided with a spigot matched with the transmission shaft sleeve (9) and is connected with the transmission shaft sleeve (9) through a second hexagon socket head cap screw (26).

8. The jacking mechanism special for the medical instrument as claimed in claim 1, wherein the bottom of the driving shaft sleeve (9) is provided with a second bearing position, and the middle part is provided with a third bearing position; a first tapered roller bearing (14) is arranged on the second bearing position; a second tapered roller bearing (25) is arranged on the third bearing position; the transmission shaft sleeve (9) is rotatably connected with the shell (12) through a first tapered roller bearing (14) and is rotatably connected with the cover (11) through a second tapered roller bearing (25).

9. The jacking mechanism special for the medical instrument, according to claim 1, wherein the outer protective cylinder (6) is processed by a standard cylinder, and the outer wall of the cylinder is provided with a heat dissipation groove and 4 oil nozzles (8); the positions of the oil nozzles (8) correspond to the through holes on the transmission shaft sleeve (9) one by one.

10. The jacking mechanism special for the medical instrument as claimed in claim 1, wherein the lower end of the transmission screw rod (2) is provided with a threaded hole and a counter bore; the threaded hole is provided with an inner hexagonal socket head cap screw (18); and a second optical axis is reserved at the lower end of the transmission screw rod (2).