KR20170043137A - Mechenical Multistep Cylinder - Google Patents

Mechenical Multistep Cylinder Download PDF

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Publication number
KR20170043137A
KR20170043137A KR1020150142245A KR20150142245A KR20170043137A KR 20170043137 A KR20170043137 A KR 20170043137A KR 1020150142245 A KR1020150142245 A KR 1020150142245A KR 20150142245 A KR20150142245 A KR 20150142245A KR 20170043137 A KR20170043137 A KR 20170043137A
Authority
KR
South Korea
Prior art keywords
rod
drive
nut
cover
drive unit
Prior art date
Application number
KR1020150142245A
Other languages
Korean (ko)
Inventor
박웅길
김용호
윤준의
박재승
Original Assignee
(주)남광
박웅길
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)남광, 박웅길 filed Critical (주)남광
Priority to KR1020150142245A priority Critical patent/KR20170043137A/en
Priority to PCT/KR2015/011372 priority patent/WO2017047864A1/en
Publication of KR20170043137A publication Critical patent/KR20170043137A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2003—Screw mechanisms with arrangements for taking up backlash
    • F16H25/2006—Screw mechanisms with arrangements for taking up backlash with more than one nut or with nuts consisting of more than one bearing part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/2018—Screw mechanisms with both screw and nut being driven, i.e. screw and nut are both rotating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/12—Differential gearings without gears having orbital motion
    • F16H48/19—Differential gearings without gears having orbital motion consisting of two linked clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • F16H57/0472—Seals

Abstract

The present invention relates to a mechanical multi-stage cylinder in which a screw and a nut are provided inside a rod so that a plurality of rods can be moved forward and backward at the same time. The main body has a drive shaft mounted on a bearing, A cylindrical main tube having a tube cover at one end and a stopper at the other end and having a cylindrical main tube coupled with the main body, a first lead screw and a first drive unit at one end and a first rod cover at the other end, A first rod having a cylindrical first rod that is coupled to the first drive unit by an extension joint and has a hollow type extension drive located on an outer circumferential surface of the drive shaft to be coupled to the main tube, A second lead screw, a second drive unit and a first clutch, and a second lead screw, A second rod cover, a second rod nut, and a cylindrical second rod having a second rod nut coupled with the first rod, a third lead screw at one end, and a bracket at the other end, And a third rod which is coupled with the rod, so that it is not necessary to provide a hydraulic and pneumatic circuit in comparison with a hydraulic or pneumatic multi-stage cylinder. Thus, the internal structure is relatively simple and the screw and the nut are not exposed to the outside, 1 and 2, it is possible to prevent the screws and nuts from being damaged due to an external impact, as well as to prevent foreign matter from flowing into the nuts and screws, thereby significantly increasing the service life of the cylinder. In addition, in general, the diameter difference between the rod and the fixed body of the multi-stage cylinder of the mechanical multi-stage cylinder is remarkably reduced, and the object can be effectively moved back and forth with the cylinder of a compact size.

Description

[0002] Mechenical Multistep Cylinder [0003]

The present invention relates to a mechanical multi-stage cylinder in which a screw and a nut are provided inside a rod so that a plurality of rods can be moved forward and backward simultaneously.

Generally, the cylinder is a hollow type device in which the rod reciprocates by hydraulic pressure, pneumatic pressure, electricity, or the like. It is applied to various mechanical devices that need to be linearly driven and is used in various names such as cylinders, linear drives, reciprocating devices, ball screws and actuators. In the case of a multi-stage cylinder, referring to FIG. 1, as disclosed in Korean Patent Laid-Open Publication No. 10-2012-0118558, hydraulic or pneumatic pressure is applied and the diameter of the rod at the end is relatively large. However, since oil, pneumatic supply, and piping are required, the internal structure of the cylinder is relatively complicated, which makes it difficult to manufacture and maintain.

In the case of a mechanical multi-stage cylinder, a thread is formed outside the rod to be developed, so that it is relatively easily broken due to an external impact or the like. In addition, the foreign matter easily flows between the threads and the life of the cylinder is remarkably shortened. In addition, there is a problem that the diameter of the deployed rod and the diameter of the fixed body are significantly different, and the size of the cylinder must be increased.

Korean Patent Publication No. 10-2012-0118558 (Oct. 29, 2012)

The present invention can reduce the relative diameter difference between the tube and the rod so that a multistage cylinder without a pneumatic or hydraulic circuit can be applied to a relatively heavy object, and a screw and a nut, which are easily damaged by an impact, The object of the present invention is to provide a shock-resistant mechanical multi-stage cylinder.

In order to accomplish the object of the present invention, there is provided an internal combustion engine comprising a main body having a drive shaft mounted on an outer circumferential surface thereof and having a rotating drive shaft therein, a tube nut disposed therein, a tube cover at one end, and a stopper at the other end, A first lead screw and a first drive unit are provided at one end and a first rod cover is provided at the other end, and a first lead nut is incorporated therein. By the first drive unit and the extension joint, And a second type of drive unit and a first clutch are provided at one end of the first rod, and the other end of the other end of the other end of the drive shaft is connected to the other end of the drive shaft. A second clutch and a second load cover are provided in the first clutch, and a second lead nut is built in, Is a mechanical multi-stage cylinder having a cylindrical second rod, a third lead screw at one end thereof, and a third rod having a bracket at the other end and engaging with the second rod.

In another aspect of the present invention, the first drive unit includes a first drive joint, first and second torque joints, a first drive torque bar, a first drive spring, a first drive lining, and a first drive cover, The second drive unit includes a second drive joint and a second drive torque bar and is coupled to the outer circumferential surface of the extension drive.

According to another aspect of the present invention, a first rod oil seal and a first rod bush are provided on the first rod cover side, and a second rod oil seal and a second rod bush are provided on the second rod cover side .

The mechanical multi-stage cylinder according to the present invention is relatively simple in internal structure since there is no need to provide a hydraulic and pneumatic circuit in comparison with a hydraulic or pneumatic multi-stage cylinder, and the screw and the nut are not exposed to the outside, It is possible to prevent the screws and nuts from being damaged due to an external impact, as well as to prevent the foreign matter from flowing into the nuts and screws, thereby significantly increasing the service life of the cylinder. In addition, in general, the diameter difference between the rod and the fixed body of the multi-stage cylinder of the mechanical multi-stage cylinder is remarkably reduced, and the object can be effectively moved back and forth with the cylinder of a compact size.

1 is a three-dimensional view showing an internal structure of a conventional double acting multi-stage pneumatic cylinder.
2 is a cross-sectional view of a mechanical multi-stage cylinder according to the present invention when compressed.
3 is a sectional view of a first drive unit of a mechanical multi-stage cylinder according to the present invention;
4 is a sectional view of the operation of a mechanical multi-stage cylinder according to the present invention.
5 is a sectional view of the mechanical multi-stage cylinder according to the present invention when the operation is completed;

FIG. 2 is a cross-sectional view of a mechanical multi-stage cylinder according to the present invention. Referring to FIG. 2, the structure of the present invention will be described below.

A mechanical multi-stage cylinder comprising: a main body (10) in which a bearing (11) is mounted and rotated and a drive shaft (12) is mounted; a tube nut (21) A cylindrical main tube 20 having a stopper 26 at the other end and engaging with the main body 10, a first lead screw 31 and a first drive unit 32 at one end, A first clutch 38 and a first load cover 34 are provided and a first lead nut 33 is incorporated and connected to the first drive unit 32 by an extension joint 33, A cylindrical first rod 30 having a hollow extension drive 34 positioned on the outer circumferential surface of the drive shaft 12 and engaged with the main tube 20, a second lead screw 41 The second drive unit 42 and the second clutch 48 are provided and the second rod cover 44 is provided at the other end A cylindrical second rod 40 having a second lead nut 43 and engaged with the first rod 30 and a third lead screw 51 at one end and a bracket 52 And a third rod (50) having a cylindrical shape and engaged with the second rod (40).

A first rod oil seal 36 and a first rod bush 37 are provided on the first rod cover 35 side and a second rod oil seal 45 is provided on the second rod cover 44 side. And a second rod bushing (46).

The first and second clutches 48 and 49 are one of a coil spring clutch, a diaphragm spring clutch, and a centrifugal clutch. It is needless to say that various known clutches can be applied.

The tube nut coupling portion 25, the first lead nut coupling portion 38, and the second lead nut coupling portion 47 are formed by grooves and projections, and then the inside of the hollow tube having a relatively short length is subjected to a nut A plurality of cylinders may be combined to sufficiently extend the length of the cylinder.

FIG. 3 is a cross-sectional view of the first drive unit of the mechanical multi-stage cylinder according to the present invention. Referring to FIG. 3, the detailed structure of the first drive unit 32 will be described below.

The first drive unit 32 includes a first drive joint 32a and first and second torque joints 32b and 32c, a first drive torque bar 32d, a first drive spring 32e, A lining 32f and a first drive cover 32g.

The second drive unit 42 includes a second drive joint 42a and a second drive torque bar 42b and is coupled to the outer circumferential surface of the extension drive 33. [

4 and 5 are sectional views of the mechanical multi-stage cylinder according to the present invention, respectively, at the time of completion of the operation and operation of the present invention.

When the drive shaft 12 is rotated by a motor, a jackscrew, a handle, a tool, or the like, the second drive unit 42 and the second lead 42 are mounted on the outer circumferential surface of the extension shaft 34 coupled to the outer circumferential surface of the drive shaft 12, The screw 41 is engaged with the first lead nut 33 and rotated. The third rod 50 is rotated by the third lead screw 51 rotating in engagement with the second lead nut 43 provided at the second rod 40. At this time, ). When the first and second clutches 38 and 39 are in contact with and engaged with each other while the second and third rods 40 and 50 are advanced as described above, 32).

At this time, the first drive lining 32f in contact with the first torque joint 32b rotates the first drive torque bar 32d while contacting the first and second torque joints 32b, The first drive unit 32 is separated from the stopper 16 by elasticity with respect to the first drive spring 32e.

As described above, the first drive unit 32 separated from the stopper 16 is moved forward by rotating the first lead screw 31 in engagement with the tube nut 21 to advance the first rod 20. At this time, the extension shaft 34 also rotates and advances by the first drive unit 32 to rotate the second lead nut 43 to advance the third rod 50.

As described above, the first drive unit 30 functions as a torque limiter. Therefore, it is needless to say that various known torque limiters can be applied to the structure without being limited to the above structure.

As a specific example, advancement of the second rod 40 is completed 100% before the first drive unit 32 is separated from the stopper 26, and 50% advancement of the third rod 50 is performed . This can be easily applied by adjusting the pitch of each screw and nut. The advance of the second rod 40 is completed 100% and the first drive unit 32 is separated from the stopper 26 by the first clutch 48 and the second clutch 49 in contact and engagement The advancement of the first rod 30 is 100%, and at the same time, the third rod completes the advancement of the remaining 50%. In addition, the first, second and third rods 30, 40, and 50, which have been advanced as described above, are compressed in the reverse order of the above-described advancing process.

The mechanical multi-stage cylinder described above is three-stage, but it is obvious that the same multi-stage cylinder can be constituted by four or more stages by adding the same structure such as an extension shaft and a rod.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

10. Main Body 11. Bearing
12. Drive shaft 13. Extension joint
14. Extension shaft 20. Main tube
21. Tube nut 22. Tube cover
23. Tube oil seal 24. Tube bush
25. Tube nut coupling 26. Stopper
30. First load 31. First lead screw
32. First drive unit 32a. The first drive joint
32b. First torque joint 32c. Second torque joint
32d. The first drive torque bar 32e. The first drive spring
32f. First drive lining 32g. The first drive cover
33. Extension drive 34. Extension joint
35. First lead nut 36. First rod cover
37. First rod oil seal 37. First rod bush
39. First lead nut coupling part 40. Second rod
41. Second lead screw 42. Second drive unit
42a. Second drive joint 42b. The second drive torque bar
43. Second lead nut 44. Second rod cover
45. Second rod oil seal 46. Second rod bush
47. Second lead nut coupling part 48. First clutch
49. Second clutch 50. Third load
51. Third lead screw 52. Bracket

Claims (6)

In a mechanical multi-stage cylinder,
A main body 10 having a drive shaft 12 on which a bearing 11 is mounted and rotated,
A cylindrical main tube 20 having a tube nut 21 inside and a tube cover 22 at one end and a stopper 26 at the other end to engage with the main body 10;
The first lead screw 31 and the first drive unit 32 are provided at one end and the first load cover 34 is provided at the other end and the first lead nut 33 is built in. And a hollow extension drive 34 which is coupled to the main shaft 20 by the extension shaft 32 and the extension joint 33 and is located on the outer circumferential surface of the drive shaft 12, (30);
The second clutch 49 and the second load cover 44 are provided at the other end and the second lead screw 41, the second drive unit 42 and the first clutch 48 are provided at one end, A cylindrical second rod 40 having a built-in nut 43 and engaging with the first rod 30;
And a cylindrical third rod (50) having a third lead screw (51) at one end and a bracket (52) at the other end to engage with the second rod (40) cylinder. The method according to claim 1,
The first drive unit 32 includes a first drive joint 32a and first and second torque joints 32b and 32c, a first drive torque bar 32d, a first drive spring 32e, Lining (32f) and a first drive cover (32g). The method according to claim 1,
Wherein the second drive unit (42) is provided with a second drive joint (42a) and a second drive torque bar (42b) and is coupled to the outer circumferential surface of the extension drive (33). The method according to claim 1,
Wherein a first rod oil seal (36) and a first rod bush (37) are provided on the side of the first rod cover (35). The method according to claim 1,
And a second rod oil seal (45) and a second rod bush (46) are provided on the side of the second rod cover (44). The method according to claim 1,
Wherein the first and second clutches (48, 49) are one of a coil spring clutch, a diaphragm spring clutch, and a centrifugal clutch.



KR1020150142245A 2015-09-15 2015-10-12 Mechenical Multistep Cylinder KR20170043137A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150142245A KR20170043137A (en) 2015-10-12 2015-10-12 Mechenical Multistep Cylinder
PCT/KR2015/011372 WO2017047864A1 (en) 2015-09-15 2015-10-27 Mechanical multi-stage cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150142245A KR20170043137A (en) 2015-10-12 2015-10-12 Mechenical Multistep Cylinder

Publications (1)

Publication Number Publication Date
KR20170043137A true KR20170043137A (en) 2017-04-21

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Application Number Title Priority Date Filing Date
KR1020150142245A KR20170043137A (en) 2015-09-15 2015-10-12 Mechenical Multistep Cylinder

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KR (1) KR20170043137A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101860444B1 (en) * 2017-11-17 2018-05-23 주식회사 태일 Telescopic cylinder assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101860444B1 (en) * 2017-11-17 2018-05-23 주식회사 태일 Telescopic cylinder assembly

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