CN109000028B - Crank double-link type actuating mechanism - Google Patents
Crank double-link type actuating mechanism Download PDFInfo
- Publication number
- CN109000028B CN109000028B CN201810955326.8A CN201810955326A CN109000028B CN 109000028 B CN109000028 B CN 109000028B CN 201810955326 A CN201810955326 A CN 201810955326A CN 109000028 B CN109000028 B CN 109000028B
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- connecting rod
- crank
- oil cylinder
- piston
- hinge shaft
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1225—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a plurality of pistons
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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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/52—Mechanical actuating means with crank, eccentric, or cam
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to a crank double-connecting-rod type actuating mechanism which comprises a first oil cylinder and a second oil cylinder, wherein a first piston is arranged in the first oil cylinder, a second piston is arranged in the second oil cylinder, the first piston is hinged with one end of a first connecting rod through a first piston shaft, the second piston is hinged with one end of a second connecting rod through a second piston shaft, a first shoulder and a second shoulder are respectively formed on the upper end surface and the lower end surface of the other end of the first connecting rod and the second connecting rod, which are contacted with a hinge shaft, the outer ring of the first shoulder is matched with a first retaining ring, and the outer ring of the second shoulder is matched with a second retaining ring; the crank is connected with the hinge shaft, and the other end of the crank, which is not connected with the hinge shaft, is in key connection with the driving shaft. The invention has convenient processing and lower cost, the first connecting rod and the second connecting rod are formed by processing and dividing a connected connecting rod casting, so that the connecting parts of the first connecting rod, the second connecting rod and the crank and the hinge shaft have small volume, and the design requirements of related parts on the aspects of structure, strength and the like are reduced because the component force of the piston acting on the oil cylinder is small.
Description
Technical Field
The invention relates to the field of angular travel actuating mechanisms, in particular to a crank double-link type actuating mechanism suitable for a hydraulically driven valve.
Background
The existing hydraulic driving angular travel double-acting actuating mechanism mostly adopts a rack and pinion structure or a crank block type structure, the radial component force of the hydraulic stress of an oil cylinder piston acting on a cylinder body is large, the structural design and part processing are complex, and the cost is high.
Disclosure of Invention
The applicant aims at the existing problems and carries out research and improvement, and provides a crank double-connecting-rod type actuating mechanism which has the advantages of simple structure, easiness in processing and lower cost.
The technical scheme adopted by the invention is as follows:
a crank double-connecting-rod type actuating mechanism comprises a first oil cylinder and a second oil cylinder which are symmetrically distributed in the left-right direction, wherein a first piston is arranged in the first oil cylinder, a second piston is arranged in the second oil cylinder, the first piston is hinged with one end of a first connecting rod through a first piston shaft, the second piston is hinged with one end of a second connecting rod through a second piston shaft, a first convex shoulder and a second convex shoulder are respectively formed on the upper end surface and the lower end surface of the other end, which is contacted with a hinge shaft, of the first connecting rod and the second connecting rod, a first retaining ring is matched with the outer ring of the first convex shoulder, and a second retaining ring is matched with the outer ring of the second convex shoulder; the crank is connected with the hinge shaft, and the other end of the crank, which is not connected with the hinge shaft, is in key connection with the driving shaft.
The further technical scheme is as follows:
one end of the first connecting rod, which is contacted with the first piston shaft, and one end of the second connecting rod, which is contacted with the second piston shaft, are in a circular ear ring shape, the other ends of the first connecting rod, the second connecting rod, which are contacted with the hinge shaft, are in a half ear ring shape, and a semicircular opening hole for matching the excircle of the hinge shaft is formed between the other end of the first connecting rod, which is provided with the half ear ring shape, and the other end of the second connecting rod, which is provided with the half ear ring shape;
the other ends of the first connecting rod and the second connecting rod, which are provided with semi-lug ring shapes, are divided and processed by a connecting rod to form a first side surface and a second side surface, wherein the first side surface is a plane, each first side surface is respectively parallel to a symmetrical center line d of the connecting rod, and a gap is formed between the adjacent first side surfaces;
the first convex shoulder and the second convex shoulder are both semi-circular convex shoulders, the outer circle of the semi-circular ring of the first convex shoulder is in sliding fit with the inner hole of the first retaining ring, and the outer circle of the semi-circular ring of the second convex shoulder is in sliding fit with the inner hole of the second retaining ring;
the thickness of the first retaining ring is equal to the height of the first shoulder, and the thickness of the second retaining ring is equal to the height of the second shoulder;
one end of the crank, which is matched with the hinge shaft, is in a double-lug ring shape, and two end faces of the inner side of the crank, which is provided with the double-lug ring shape, are respectively in sliding fit with the end faces of the first convex shoulder and the second convex shoulder;
the symmetrical axis b of the crank is equal to the axial lead of the first oil cylinder and the second oil cylinder in height, when the crank is in the middle position, the symmetrical axis b of the crank is superposed with the symmetrical central line a of the actuating mechanism, the symmetrical axis b is vertical to the axial leads of the first oil cylinder and the second oil cylinder, the included angle between the symmetrical axis c of the first connecting rod and the second connecting rod and the axial leads of the first oil cylinder and the second oil cylinder is 10 degrees +/-3 degrees, the included angle between each first side surface of the first connecting rod and the second connecting rod is 2 α, and a gap exists between each second side surface;
when the crank is at the starting point or the end point of the 90-degree angle stroke, the symmetrical axis b of the crank forms an included angle of 45 degrees +/-3 degrees with the symmetrical central line a of the actuating mechanism, the symmetrical axis c of the first connecting rod and the second connecting rod forms an included angle of 0 degrees +/-3 degrees with the axial lead of the oil cylinder, a gap exists between each first side surface in the first connecting rod and the second connecting rod, and an included angle of 2 α exists between each second side surface.
The invention has the following beneficial effects:
the invention has simple structure, convenient use and lower cost, the first connecting rod and the second connecting rod are divided into two connecting rods with one end in the shape of a half earring by adopting a one-piece connecting rod casting, so that the connecting parts of the first connecting rod, the second connecting rod and the crank and the hinge shaft have small volume, and because the included angle between the symmetrical axis of the connecting rods and the axial lead of the oil cylinder is small, the radial component force of the hydraulic pressure of the piston of the oil cylinder acting on the cylinder body in the working process of the actuating mechanism is small, and the design requirements of related parts on the aspects of structure, strength and the like are reduced.
Drawings
Fig. 1 is a structural sectional view of the present invention.
Fig. 2 is a sectional view taken along a symmetrical center line a of fig. 1.
FIG. 3 is a front view of the one-piece connecting rod.
FIG. 4 is a cross-sectional view of the one-piece connecting rod.
Fig. 5 is a cut-away view of the center earring portion of the one-piece connecting rod.
Wherein: 1. a first cylinder; 2. a first piston; 3. a first piston shaft; 4. a first link; 5. a drive shaft; 6. a crank; 7. a first retaining ring; 8. a hinge shaft; 9. a key; 10. a box body; 11. a second link; 12. a second piston shaft; 13. a second piston; 14. a second cylinder; 15. a first shoulder; 16. a second retaining ring; 17. a second shoulder; 18. a first side surface; 19. a second side.
Detailed Description
The following describes specific embodiments of the present invention.
As shown in fig. 1 and 2, the crank double-link actuator comprises a first oil cylinder 1 and a second oil cylinder 14 which are symmetrically distributed left and right, the first oil cylinder 1 and the second oil cylinder 14 are respectively arranged at the left side and the right side of a box body 10, a first piston 2 is arranged in the first oil cylinder 1, a second piston 13 is arranged in the second oil cylinder 14, the first piston 2 is hinged with an ear ring at one end of a first connecting rod 4 through a first piston shaft 3, the second piston 13 is hinged with an ear ring at one end of a second connecting rod 11 through a second piston shaft 12, semicircular openings at the parts of the half ear rings at the other ends of the first connecting rod 4 and the second connecting rod 11 are respectively abutted against a hinge shaft 8, two end surfaces of the half ear rings, which are contacted with the first connecting rod 4 and the second connecting rod 11, are respectively provided with a semicircular first shoulder 15 and a second shoulder 17, an outer circular part of the first shoulder 15 is in sliding fit with an inner hole of a first retaining ring 7, an outer circular part of the second shoulder 17 is in sliding fit with an inner hole of a second, the thickness of the first retaining ring 7 is equal to the height of the first shoulder 15, and the thickness of the second retaining ring 16 is equal to the height of the second shoulder 17; the end of the crank 6 matched with the hinge shaft 8 is in a double-lug ring shape, two end faces of the inner side of the end of the crank 6 with the double-lug ring shape are respectively in sliding fit with two end faces of the first convex shoulder 15 and the second convex shoulder 17, and the other end of the crank 6 not connected with the hinge shaft 8 is matched with the driving shaft 5 through a key 9. In the invention, semicircular openings at the half earring parts of the first connecting rod 4 and the second connecting rod 11 are contacted with the hinge shaft 8 for bearing pressure, and the first connecting rod 4, the second connecting rod 11, the crank 6 and the hinge shaft 8 are always kept in a hinged state through the first retaining ring 7 and the second retaining ring 16.
As shown in figures 3 and 4, the initial blank of the first connecting rod 4 and the second connecting rod 11 is a connected rod-shaped casting, the two ends of the casting are earrings connected with the first piston shaft 3 and the second piston shaft 12, and the central position of the casting is the earring matched with the hinge shaft 8. As shown in figure 5, after the circular earring at the central position is processed, the upper part of the central earring is cut off at the position of the symmetrical center line d of the connected connecting rod by a cutting tool to form two parallel and symmetrical first side surfaces 18, the lower part of the central earring is cut off at the position of an included angle α between the central earring axis and the symmetrical center line d of the connected connecting rod to form two symmetrical second side surfaces 19, and the connected connecting rod casting is processed and divided into two first connecting rods 4 and second connecting rods 11 which have the same shape and size and one end of which is in the shape of a half earring.
The specific working process of the invention is as follows:
as shown in the solid line graph in fig. 1, when the crank 6 is at the middle position symmetrical to the first cylinder 1 and the second cylinder 14, the symmetry axis b of the crank 6 coincides with the symmetry center line a of the actuator, and the symmetry axis b is perpendicular to the axial lines of the first cylinder 1 and the second cylinder 14, the included angle between the symmetry axis c of the first link 4 and the second link 11 and the axial lines of the first cylinder 1 and the second cylinder 14 is the maximum (the included angle is 10 ° ± 3 °), the included angle 2 α exists between the first side surfaces 18 of the first link 4 and the second link 11, and the gap exists between the second side surfaces 19.
As shown by the two-dot chain line graph in fig. 1, when the crank 6 is at the start (end) position of the 90 ° angle stroke, the symmetric axis b thereof forms an angle of 45 ° with the symmetric center line a of the actuator, the symmetric axis c of the first link 4 and the second link 11 at the position forms an angle of about 0 ° with the axial lines of the first cylinder 1 and the second cylinder 14, a gap exists between the first side surfaces 18 of the first link 4 and the second link 11, an angle of 2 α exists between the second side surfaces 19, and the half earring ends of the first link 4 and the second link 11 do not interfere with each other during the 90 ° angle stroke operation.
As shown in fig. 1, a driving shaft 5 of the actuator is connected to a main shaft of the angular travel valve, when the valve needs to rotate in a forward direction, high-pressure oil from an external hydraulic power source enters the first oil cylinder 1 from the oil pipe joint a and acts on the first piston 2, the first piston shaft 3 drives a semicircular opening part at a half earring end of the first connecting rod 4 to push and press the hinge shaft 8, and the valve is driven to rotate in the forward direction through a crank 6, a key 9 and the driving shaft 5. Meanwhile, the hinge shaft 8 contacts with a semicircular opening part at the half earring end of the second connecting rod 11, pushes the second connecting rod 11 and the second piston shaft 12 and drives the second piston 13 to move rightwards, so that oil in the second oil cylinder 14 returns to a low-pressure oil chamber of an external hydraulic power source through an oil pipe of the pipe joint B.
As shown in figure 1, when the valve needs to move reversely, high-pressure oil from an external hydraulic power source enters the second oil cylinder 14 from the oil pipe joint B to act on the second piston 13, the second piston shaft 12 drives the semicircular opening part at the semi-ear ring end of the second connecting rod 11 to push the hinge shaft 8, and the crank 6, the key 9 and the driving shaft 5 drive the valve to move reversely. Meanwhile, the hinge shaft 8 is in contact with a semicircular opening at the semi-earring end of the first connecting rod 4, the first connecting rod 4 and the first piston shaft 3 are pushed, the first piston 2 is driven to move leftwards, and oil in the first oil cylinder 1 returns to a low-pressure oil chamber of an external hydraulic power source from an oil pipe of the pipe joint A. The invention has simple structure, convenient use and low cost, the first connecting rod and the second connecting rod are processed by adopting a one-piece connecting rod casting and are divided into two connecting rods with one ends in the shape of half earrings, so that the volumes of the connecting parts of the first connecting rod, the second connecting rod and the crank and the hinge shaft are smaller, and the design requirements of related parts on the aspects of structure, strength and the like are reduced because the included angle between the symmetrical axis of the first connecting rod and the second connecting rod and the axial lead of the oil cylinder is small and the radial component force of the hydraulic pressure of the oil cylinder piston acting on the cylinder body in the working process of angular travel is smaller.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the basic structure thereof.
Claims (6)
1. Crank double link formula actuating mechanism, its characterized in that: the oil cylinder structure comprises a first oil cylinder (1) and a second oil cylinder (14) which are symmetrically distributed in the left-right direction, wherein a first piston (2) is arranged in the first oil cylinder (1), a second piston (13) is arranged in the second oil cylinder (14), the first piston (2) is hinged to one end of a first connecting rod (4) through a first piston shaft (3), the second piston (13) is hinged to one end of a second connecting rod (11) through a second piston shaft (12), the upper end face and the lower end face of the other end, which is contacted with a hinge shaft (8), of the first connecting rod (4) and the second connecting rod (11) respectively form a first convex shoulder (15) and a second convex shoulder (17), the outer ring of the first convex shoulder (15) is matched with a first retaining ring (7), and the outer ring of the second convex shoulder (17) is matched with a second retaining ring (16); the crank (6) is connected with the hinge shaft (8), and the other end of the crank (6), which is not connected with the hinge shaft (8), is in key connection with the driving shaft (5);
the piston rod structure comprises a first connecting rod (4), a second connecting rod (11), a hinge shaft (8), a connecting rod (11), a first side face (18) and a second side face (19), wherein one end, contacted with the first piston shaft (3), of the first connecting rod (4) and one end, contacted with the second piston shaft (12), of the second connecting rod (11) are both in a circular lug ring shape, the other ends, contacted with the hinge shaft (8), of the first connecting rod (4) and the second connecting rod (11) are both in a half lug ring shape, semicircular open holes used for being matched with the excircle of the hinge shaft (8) are formed between the other ends, contacted with the half lug ring shape, of the first connecting rod (4) and the other ends, contacted with the half lug ring shape, of the second connecting rod (11) are formed by cutting and machining through the connecting rod to form the first side face (18) and the second side face (19), the first side face (18) is a plane, each first side face (18) is parallel to the symmetrical center line d of the connecting rod, gaps are formed between the adjacent first side face (18.
2. The crank-double linkage actuator of claim 1, wherein: the first convex shoulder (15) and the second convex shoulder (17) are both semicircular convex shoulders, the semicircular outer ring of the first convex shoulder (15) is in sliding fit with the inner hole of the first retaining ring (7), and the semicircular outer ring of the second convex shoulder (17) is in sliding fit with the inner hole of the second retaining ring (16).
3. The crank-double linkage actuator of claim 2, wherein: the thickness of the first retaining ring (7) is equal to the height of the first shoulder (15), and the thickness of the second retaining ring (16) is equal to the height of the second shoulder (17).
4. The crank-double linkage actuator of claim 1, wherein: the end, matched with the hinge shaft (8), of the crank (6) is in a double-lug ring shape, and two end faces of the inner side of the double-lug ring of the crank (6) are respectively in sliding fit with the end faces of the first convex shoulder (15) and the second convex shoulder (17).
5. The crank double-connecting-rod type actuating mechanism is characterized in that the symmetrical axis b of the crank (6) is equal to the axial lead of the first oil cylinder (1) and the second oil cylinder (14) in height, when the crank (6) is in the middle position, the symmetrical axis b of the crank (6) is superposed with the symmetrical central line a of the actuating mechanism, the symmetrical axis b is perpendicular to the axial leads of the first oil cylinder (1) and the second oil cylinder (14), the symmetrical axis c of the first connecting rod (4) and the second connecting rod (11) is 10 degrees +/-3 degrees from the axial leads of the first oil cylinder (1) and the second oil cylinder (14), an included angle of 2 α exists between each first side surface (18) of the first connecting rod (4) and the second connecting rod (11), and a gap exists between each second side surface (19).
6. The crank double-connecting-rod type actuating mechanism is characterized in that when the crank (6) is at the starting point or the end point of the 90-degree angular travel, the symmetrical axis b of the crank (6) forms an included angle of 45 degrees +/-3 degrees with the symmetrical center line a of the actuating mechanism, the symmetrical axes c of the first connecting rod (4) and the second connecting rod (11) form an included angle of 0 degrees +/-3 degrees with the axis line of the oil cylinder, a gap exists between the first side surfaces (18) of the first connecting rod (4) and the second connecting rod (11), and an included angle of 2 α exists between the second side surfaces (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810955326.8A CN109000028B (en) | 2018-08-21 | 2018-08-21 | Crank double-link type actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810955326.8A CN109000028B (en) | 2018-08-21 | 2018-08-21 | Crank double-link type actuating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109000028A CN109000028A (en) | 2018-12-14 |
| CN109000028B true CN109000028B (en) | 2020-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810955326.8A Active CN109000028B (en) | 2018-08-21 | 2018-08-21 | Crank double-link type actuating mechanism |
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| Country | Link |
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| CN (1) | CN109000028B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191112707A (en) * | 1911-11-27 | 1912-06-27 | Frederick George Jones | Improvements in Hydraulic and like Clutches and Driving Gear. |
| CN2184481Y (en) * | 1994-02-01 | 1994-12-07 | 徐保军 | Two eccentric alligator |
| CN2887651Y (en) * | 2005-12-30 | 2007-04-11 | 王怀勤 | Automatic pressure power device of wheel |
| CN201802488U (en) * | 2010-10-09 | 2011-04-20 | 湖北新火炬科技股份有限公司 | Rotor motor and piston connection rod assembly thereof |
| CN102777343A (en) * | 2012-06-20 | 2012-11-14 | 杭州海胜制冷设备有限公司 | Single-drive multi-cylinder compressor structure |
-
2018
- 2018-08-21 CN CN201810955326.8A patent/CN109000028B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191112707A (en) * | 1911-11-27 | 1912-06-27 | Frederick George Jones | Improvements in Hydraulic and like Clutches and Driving Gear. |
| CN2184481Y (en) * | 1994-02-01 | 1994-12-07 | 徐保军 | Two eccentric alligator |
| CN2887651Y (en) * | 2005-12-30 | 2007-04-11 | 王怀勤 | Automatic pressure power device of wheel |
| CN201802488U (en) * | 2010-10-09 | 2011-04-20 | 湖北新火炬科技股份有限公司 | Rotor motor and piston connection rod assembly thereof |
| CN102777343A (en) * | 2012-06-20 | 2012-11-14 | 杭州海胜制冷设备有限公司 | Single-drive multi-cylinder compressor structure |
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| Publication number | Publication date |
|---|---|
| CN109000028A (en) | 2018-12-14 |
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