CN117847041A - Automatic control cylinder - Google Patents
Automatic control cylinder Download PDFInfo
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- CN117847041A CN117847041A CN202410123714.5A CN202410123714A CN117847041A CN 117847041 A CN117847041 A CN 117847041A CN 202410123714 A CN202410123714 A CN 202410123714A CN 117847041 A CN117847041 A CN 117847041A
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- locking
- piston
- brake
- cylinder
- locking piston
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- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
Abstract
The invention relates to the technical field of pneumatic drive, in particular to an automatic control cylinder. The locking piston assembly is arranged on the outer side of the cylinder barrel, is arranged on the inner side of the cylinder barrel and slides in a matched manner with the sliding block assembly; the locking piston assembly divides the inner cavity of the cylinder barrel into a left cavity and a right cavity, a left air inlet is formed in the left end cover, and a right air inlet is formed in the right end cover. When the air cylinder does not supply air, a brake rod in the locking piston assembly clamps the locking rod under the action of the locking piston; when the cylinder supplies air, compressed air can pass through a special flow passage of the locking piston assembly to push the locking piston, so that the locking rod is released by the brake rod, and automatic unlocking is completed.
Description
Technical Field
The invention relates to the technical field of pneumatic drive, in particular to an automatic control cylinder capable of automatically locking and unlocking.
Background
The pneumatic technology is rapidly developed and applied in the field of automation, and the air cylinder is an executive component which takes compressed air as a power source and converts potential energy of the compressed air into mechanical energy, and has the advantages of high action speed, large output force, simplicity in operation and low cost. The cylinder is less reliable to stop at the intermediate position due to the compressibility of the gas, and is easily moved under the influence of external force or self gravity. In particular, cylinders mounted in a vertical direction, the piston slides downwards under the action of gravity.
The prior method for solving the problem of stopping the middle position of the air cylinder mainly comprises the following steps: and a locking cylinder is arranged on the rod outlet side of the piston rod of the air cylinder to lock the piston rod so that the piston rod cannot move. This approach increases the cylinder installation length, increases the complexity of the pneumatic system, and is not suitable for rodless cylinders. Or the piston is kept still by means of pressurization of two cavities, but the method can only improve the rigidity of the cylinder, and small displacement can be generated under the condition that the external acting force is large enough. Both methods utilize external devices or techniques to stop the cylinder in an intermediate position, and the cylinder itself cannot be reliably stopped in the middle.
Disclosure of Invention
In order to solve the technical problems, the invention provides a novel cylinder with an automatic locking and unlocking function, so as to solve the problem that the cylinder cannot be reliably stopped at the middle position.
The invention discloses an automatic control cylinder which comprises a cylinder barrel, a left end cover, a right end cover, a sliding block assembly, a locking piston assembly and a locking rod, wherein the sliding block assembly is arranged on the outer side of the cylinder barrel, and the locking piston assembly is arranged on the inner side of the cylinder barrel and slides in a matched manner with the sliding block assembly; the locking piston assembly divides the inner cavity of the cylinder barrel into a left cavity and a right cavity, a left air inlet is formed in the left end cover, and a right air inlet is formed in the right end cover; the locking piston assembly comprises a locking piston end cover, a brake rod spring, a brake rod, a brake piston spring, a locking cylinder barrel, a locking piston base and a piston magnetic ring which are sequentially installed, and a locking piston base groove is formed in one side of the locking piston base; the brake piston spring is sleeved on the inner side of the locking cylinder barrel and is arranged between the brake piston and the locking piston base, and one end of the brake piston spring is clamped in the groove of the locking piston base; the brake piston divides the inner space of the locking cylinder barrel into an unlocking containing cavity and a locking containing cavity, the locking cylinder barrel is provided with a penetrating air passage, a bifurcation air passage is arranged in the middle and communicated with the unlocking containing cavity, and a valve core spring and a conical unidirectional valve core are respectively arranged at two ends of the air passage; corresponding small holes are formed in the axial directions of the locking piston end cover and the locking piston base and correspond to the air passages in the locking cylinder barrel; one end of the brake rod is a brake arm, the other end of the brake rod is a half-arc brake shoe, one side of the brake shoe is an inclined plane, and the two or more brake rods are surrounded on the locking rod through the half-arc brake shoe; the sliding block assembly comprises a left wear-resistant ring, a right wear-resistant ring, a sliding block magnetic ring and a clamp spring, wherein the sliding block is arranged at the outer side of the sliding block magnetic ring, and the left wear-resistant ring and the right wear-resistant ring are respectively arranged at two ends of the sliding block; the piston magnetic ring and the slider magnetic ring are respectively arranged at the inner side and the outer side of the locking cylinder barrel and interact with each other.
Preferably, a notch matched with the brake arm is arranged on one side of the locking piston end cover, which faces the locking cylinder barrel.
Preferably, the side of the brake piston, which is contacted with the brake piston spring, is a plane, and the side of the brake piston, which is contacted with the brake rod, is an annular conical inclined plane.
Preferably, a plurality of fixing screw mounting holes are formed in the locking piston end cover and the locking piston base, a plurality of fixing screw mounting holes are correspondingly formed in the locking cylinder barrel, and the locking piston end cover and the locking piston base are respectively fixed at two ends of the locking cylinder barrel through fixing screws.
Preferably, a seal is arranged between the locking cylinder and the left end cover and the right end cover at the two ends.
Preferably, an annular groove is formed in the sliding block, and the clamp spring is arranged in the annular groove and clamps the right wear-resisting ring.
Preferably, the cylinder barrel is a cylindrical thin-wall long barrel, and the left end cover and the right end cover are respectively arranged at two ends of the cylinder barrel.
Preferably, the locking rod passes through the locking piston assembly and is arranged in the cylinder barrel, one end of the locking rod is connected with the left end cover through a fixing screw, and the other end of the locking rod is connected with the right end cover through the fixing screw.
Preferably, the locking piston end cover and the locking rod, the locking piston base and the locking rod, and the brake piston and the locking rod are all provided with seals.
Preferably, the locking piston end cover and the locking cylinder barrel, the locking piston base and the locking cylinder barrel are all provided with seals.
Compared with the prior art, the cylinder has the functions of automatic locking when no air is supplied and automatic unlocking when the air is supplied. Meanwhile, the locking and unlocking functions of the air cylinder are automatically completed, additional air circuits and control are not needed, and a pneumatic system and a control system can be simplified.
Drawings
FIG. 1 is a schematic view of a cylinder according to the present invention in partial cross-section;
FIG. 2 is a cross-sectional view of a cylinder according to the present invention;
FIG. 3 is a schematic view of a coil fixing cylinder according to the present invention;
FIG. 4 is a schematic view of the outer cylinder according to the present invention;
FIG. 5 is a cross-sectional view of a piston rod assembly according to the present invention;
FIG. 6 is a cross-sectional view of a brake piston according to the present invention;
wherein: 1-left end cover, 2-cylinder, 3-slider assembly, 4-right end cover, 5-locking piston assembly, 6-locking lever, 11-left set screw, 12-left air inlet, 21-left containing cavity, 22-right containing cavity, 31-left wear ring, 32-slider, 33-slider magnetic ring, 34-right wear ring, 35-jump ring, 41-right set screw, 42-right air inlet, 50-locking piston end cover, 51-conical unidirectional valve core, 52-valve core spring, 53-locking piston base, 54-piston magnetic ring, 55-braking piston spring, 56-locking cylinder, 57-braking piston, 58-braking lever, 59-braking lever spring, 501 set screw, 502 locking piston end cover aperture, 561 air flue, 562 unlocking containing cavity, 563-locking containing cavity, 564 bifurcation air flue, 532 locking piston base groove, 531 locking piston base aperture, 505 notch, 571 annular conical slope, 581 braking arm, 582, semi-arc braking shoe, 583 slope.
Detailed Description
The technical solutions of the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings.
As shown in fig. 1-2, the automatic control cylinder comprises a cylinder barrel 2, a left end cover 1, a right end cover 4, a sliding block assembly 3, a locking piston assembly 5 and a locking rod 6; the cylinder barrel 2 is a cylindrical thin-wall long barrel, and the left end cover 1 and the right end cover 4 are respectively arranged at two ends of the cylinder barrel 2; the sliding block assembly 3 is arranged on the outer side of the cylinder barrel 2, and the locking piston assembly 5 is arranged on the inner side of the cylinder barrel and slides in a matched manner with the sliding block assembly 3; the locking rod 6 passes through the locking piston assembly 5 and is arranged in the cylinder barrel 2, meanwhile, one end of the locking rod 6 is connected with the left end cover 1 through a fixing screw 11, and the other end of the locking rod is connected with the right end cover 4 through a fixing screw 41, so that the sliding support effect of the locking piston assembly 5 is realized.
As shown in fig. 2-6, the locking piston assembly 5 divides the inner cavity of the cylinder barrel into a left cavity 21 and a right cavity 22, the left end cover 1 is provided with a left air inlet 12, so that the left cavity 21 can be communicated with the outside through the left air inlet 12, and the right end cover 4 is provided with a right air inlet 42, so that the right cavity 22 can be communicated with the outside through the right air inlet 42. The locking piston assembly 5 can slide along the inner wall of the cylinder barrel 2 in an unlocked state; when the locking piston assembly 5 and the sliding block assembly 3 attract each other, the locking piston assembly 5 moves and drives the sliding block assembly 3 to move together.
The locking piston assembly 5 comprises a locking piston end cover 50, a brake rod spring 59, a brake rod 58, a brake piston 57, a brake piston spring 55, a locking cylinder 56 and a locking piston base 53 which are sequentially arranged; a locking piston base groove 532 is formed on one side, facing the locking cylinder barrel 56, of the locking piston base 53, a through small hole 531 is formed in the axial direction of the locking piston base 53, and a plurality of fixing screw mounting holes are formed in the locking piston base; the brake piston spring 55 is sleeved on the inner side of the locking cylinder barrel 56 and is arranged between the brake piston 57 and the locking piston base 53, and one end of the brake piston spring 55 is clamped in the locking piston base groove 532 and is fixedly connected with the locking piston base 53;
the brake piston 57 divides the inner space of the locking cylinder 56 into an unlocking cavity 562 and a locking cavity 563, the locking cylinder 56 is provided with a through air passage 561, a bifurcation air passage 564 is arranged in the middle and communicated with the unlocking cavity 562, and the two ends of the air passage 561 are respectively provided with a valve core spring 52 and a conical unidirectional valve core 51;
as shown in fig. 4, one end of the brake lever 58 is a brake arm 581, the other end is a half-arc brake shoe 582, one side of the brake shoe 582 is an inclined plane 583, the two or more brake levers 58 are surrounded on the locking lever by the half-arc brake shoe 582, and the brake lever spring 59 is sleeved on the locking lever 6 between the brake lever 58 and the locking piston end cover 50; as shown in fig. 3, the locking piston end cap 50 is provided with a recess 505 on the side facing the locking cylinder 56, which recess is adapted to the brake arm 581. The side of the brake piston 57 contacting the brake piston spring 55 is a plane, the side contacting the brake lever 58 is an annular conical inclined plane 571, and when the brake piston 57 moves toward the brake lever 58 and contacts, the brake shoe 582 and the brake arm tail portion are engaged in the annular conical inclined plane 571 of the brake piston 57.
In the embodiment shown in fig. 1, two brake levers 58 are attached to the locking lever 6 through brake shoes 582, when the brake piston spring is unfolded, the brake piston 57 pushes the brake lever 58 to move toward the locking piston end cover 50 under the action of the spring force until the brake arms 581 are engaged with the notches 505, the annular conical inclined surfaces 571 of the brake piston 57 are pressed against the brake shoes and the tail portions of the brake arms, and the brake lever spring 59 is in a compressed state. At this time, the brake lever 58 is held tightly against the lock lever 6 so that the lock piston assembly 5 and the lock lever 6 are locked against movement.
The locking piston end cover 50 is provided with a through small hole 502 in the axial direction and a plurality of fixing screw mounting holes; the small hole 502 on the locking piston end cover 50, the locking cylinder barrel air passage 561 and the small hole 531 on the locking piston base 53 are correspondingly arranged; the locking piston end cover 50 and the locking piston base 53 are respectively fixed at two ends of the locking cylinder barrel 56 through fixing screws 501, and the locking cylinder barrel 56 is sleeved with a piston magnetic ring 54.
Normally, compressed air is not introduced into the left air inlet 12 and the air inlet 42, the brake piston 57 is propped against the brake rod 58 under the thrust of the brake piston spring 55, and the brake shoe 582 is pressed towards the locking rod 6 to lock the locking rod 6 due to the annular inclined plane 571, so that the locking piston assembly 5 cannot move along the cylinder barrel 2, and the sliding block assembly 3 cannot move. This is the locked state of the cylinder.
When the cylinder moves to the right, the left air inlet 12 is connected with compressed air, and the right air inlet 42 is connected with the atmosphere. Compressed gas fills left cavity 21 through left inlet 12, pushes one-way valve core 51 through small hole 502 on locking piston end cover 50, flows into unlocking cavity 562 through air passages 561 and 564, and pushes brake piston 57 to move rightward against the thrust of brake piston spring 55; the brake lever spring 59 acts on the inclined surface 583 of the brake lever 58 such that the brake lever 58 receives a force away from the lock lever 6, releasing the lock lever 6; because the one-way valve core 51 at one side of the right containing cavity 22 is under the action of the valve core spring 52, the compressed gas in the air channel 561 cannot flow into the right containing cavity 42 through the small hole 531 on the locking piston base 53, and therefore, the locking piston assembly 5 moves rightwards under the action of the air pressure difference to drive the sliding block assembly 3 to move rightwards.
When the cylinder moves leftwards, the right air inlet 42 is connected with compressed air, and the left air inlet 12 is connected with the atmosphere. Compressed gas fills the right containing cavity 41 through the right air inlet 42, pushes the one-way valve core 51 through the small hole 531 on the locking piston base 53, flows into the unlocking containing cavity 562 through the air passages 561 and 564, and pushes the braking piston 57 to move rightwards against the thrust of the braking piston spring 55; the brake lever spring 59 acts on the inclined surface 583 of the brake lever 58 such that the brake lever 58 receives a force away from the lock lever 6, releasing the lock lever 6; because the one-way valve core 51 at one side of the right accommodating cavity 22 is under the action of the valve core spring 52, the compressed gas in the air channel 561 cannot flow into the left accommodating cavity 12 through the small hole 502 on the locking piston end cover 50, and therefore, the locking piston assembly 5 moves leftwards under the action of the air pressure difference to drive the sliding block assembly 3 to move leftwards.
When the slide needs to be stopped, the left air inlet 12 and the right air inlet 42 are communicated with the atmosphere, compressed air in the left and right accommodating cavities is discharged, air in the unlocking accommodating cavity 562 and the air channel 561 is also discharged, the brake piston spring 55 pushes the brake piston 57 to press the brake rod 58 to lock the locking rod 6, the locking piston assembly 5 stops moving, and the slide assembly 3 stops moving.
The sliding block assembly 3 comprises a left wear-resistant ring 31, a right wear-resistant ring 34, a sliding block 32, a sliding block magnetic ring 33 and a clamp spring 35, wherein an annular groove is formed in the sliding block 32, the clamp spring 35 is arranged in the annular groove, and the right wear-resistant ring is clamped, so that the sliding block magnetic ring 33, the sliding block 32, the left wear-resistant ring 31 and the right wear-resistant ring 34 can move integrally. The sliding block assembly 3 is coupled with the magnetic force action of the sliding block magnetic ring 33 and the piston magnetic ring 54 which are used for locking the piston assembly 5, so that the sliding block assembly and the piston assembly can move and stop together.
The above description is only of the preferred embodiments of the present application and the description of the technical principles applied, and it should be understood by those skilled in the art that the scope of the invention in the present application is not limited to the specific combination of the technical features described above, but also covers other technical solutions formed by any combination of the technical features described above or the equivalent thereof without departing from the inventive concept.
Claims (10)
1. The automatic control cylinder is characterized by comprising a cylinder barrel, a left end cover, a right end cover, a sliding block assembly, a locking piston assembly and a locking rod, wherein the sliding block assembly is arranged on the outer side of the cylinder barrel, and the locking piston assembly is arranged on the inner side of the cylinder barrel and slides in a matched manner with the sliding block assembly;
the locking piston assembly divides the inner cavity of the cylinder barrel into a left cavity and a right cavity, a left air inlet is formed in the left end cover, and a right air inlet is formed in the right end cover;
the locking piston assembly comprises a locking piston end cover, a brake rod spring, a brake rod, a brake piston spring, a locking cylinder barrel, a locking piston base and a piston magnetic ring which are sequentially installed, and a locking piston base groove is formed in one side of the locking piston base;
the brake piston spring is sleeved on the inner side of the locking cylinder barrel and is arranged between the brake piston and the locking piston base, and one end of the brake piston spring is clamped in the groove of the locking piston base;
the brake piston divides the inner space of the locking cylinder barrel into an unlocking containing cavity and a locking containing cavity, the locking cylinder barrel is provided with a penetrating air passage, a bifurcation air passage is arranged in the middle and communicated with the unlocking containing cavity, and a valve core spring and a conical unidirectional valve core are respectively arranged at two ends of the air passage;
corresponding small holes are formed in the axial directions of the locking piston end cover and the locking piston base and correspond to the air passages in the locking cylinder barrel;
one end of the brake rod is a brake arm, the other end of the brake rod is a half-arc brake shoe, one side of the brake shoe is an inclined plane, and the two or more brake rods are surrounded on the locking rod through the half-arc brake shoe;
the sliding block assembly comprises a left wear-resistant ring, a right wear-resistant ring, a sliding block magnetic ring and a clamp spring, wherein the sliding block is arranged at the outer side of the sliding block magnetic ring, and the left wear-resistant ring and the right wear-resistant ring are respectively arranged at two ends of the sliding block; the piston magnetic ring and the slider magnetic ring are respectively arranged at the inner side and the outer side of the locking cylinder barrel and interact with each other.
2. The automatic control cylinder according to claim 1, wherein a notch adapted to the brake arm is provided in a side of the locking piston end cap facing the locking cylinder.
3. The automatic control cylinder according to claim 1, wherein a side of the brake piston contacting the brake piston spring is a flat surface, and a side contacting the brake lever is an annular conical inclined surface.
4. The automatic control cylinder according to claim 1, wherein a plurality of fixing screw mounting holes are formed in the locking piston end cover and the locking piston base, a plurality of fixing screw mounting holes are correspondingly formed in the locking cylinder barrel, and the locking piston end cover and the locking piston base are respectively fixed to two ends of the locking cylinder barrel through fixing screws.
5. The automatic control cylinder according to claim 4, wherein a seal is provided between the locking cylinder and the left and right end caps at both ends.
6. The automatic control cylinder according to claim 1, wherein the slider is internally provided with an annular groove in which a snap spring is disposed to lock the right wear ring.
7. The automatic control cylinder according to claim 1, wherein the cylinder is a cylindrical thin-walled long cylinder, and the left end cover and the right end cover are respectively mounted at both ends of the cylinder.
8. The automatic control cylinder according to claim 1, wherein the locking rod is installed in the cylinder tube through the locking piston assembly, one end of the locking rod is connected to the left end cap by a fixing screw, and the other end of the locking rod is connected to the right end cap by a fixing screw.
9. The automatic control cylinder of claim 1, wherein seals are provided between the locking piston end cap and locking rod, the locking piston base and locking rod, and the brake piston and locking rod.
10. The automatic control cylinder of claim 1, wherein seals are provided between the locking piston end cap and the locking cylinder, and between the locking piston base and the locking cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410123714.5A CN117847041A (en) | 2024-01-29 | 2024-01-29 | Automatic control cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410123714.5A CN117847041A (en) | 2024-01-29 | 2024-01-29 | Automatic control cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117847041A true CN117847041A (en) | 2024-04-09 |
Family
ID=90547925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410123714.5A Pending CN117847041A (en) | 2024-01-29 | 2024-01-29 | Automatic control cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117847041A (en) |
-
2024
- 2024-01-29 CN CN202410123714.5A patent/CN117847041A/en active Pending
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