CN104632753A - Impact-resistant cylinder - Google Patents
Impact-resistant cylinder Download PDFInfo
- Publication number
- CN104632753A CN104632753A CN201310552016.9A CN201310552016A CN104632753A CN 104632753 A CN104632753 A CN 104632753A CN 201310552016 A CN201310552016 A CN 201310552016A CN 104632753 A CN104632753 A CN 104632753A
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- CN
- China
- Prior art keywords
- shock
- piston
- cylinder
- pressing aid
- shaft part
- Prior art date
- Legal status (The legal status 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 status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses an impact-resistant cylinder. According to the impact-resistant cylinder, inward-concave cavities are formed in one side end face or two side end faces of a piston, so that the problems that in the prior art, a cylinder is impacted by a piston easily and is broken easily are solved. In this way, the impact-resistant cylinder has the advantages that the structure is simple, the cylinder is easy to obtain, speed can be reduced smoothly during movement, cost is low, and the buffer performance is good. Various hazards caused when an end cover is impacted by the piston are reduced, and the durability of the cylinder is improved.
Description
Technical field
The present invention relates to pneumatic actuator, particularly the shock-resistant cylinder of one.
Background technique
Along with the development of industrialized production, pneumatic system has been widely applied in multiple production and processing system, and wherein, cylinder is the important executive component in pneumatic system.In the course of the work, cylinder piston is to-and-fro motion in the cylinder, and when piston movement is to cylinder terminal, piston produces very large collision impact to cylinder cap, and produces larger impact noise, easily causes the damage of cylinder body.For solving the defect of above-mentioned existing cylinder, provide a kind of pad buffer type cylinder in prior art, this cylinder by increasing cushion pad inside the cylinder cap at two ends, and damper piston is to the impact force of cylinder cap.But in actual applications, because cushion pad can only cushion piston impact power, and can not discharge, therefore, on the one hand, cushioning effect is limited, be difficult to reach designing requirement, on the other hand, " cushion pad " in this structure is owing to being subject to the impact of piston for a long time, therefore very easily damaged, need frequent maintenance.Thus making cost of production increase, the stability of pneumatic operation system declines, and Security and accuracy reduce.
Summary of the invention
For defect of the prior art, the invention provides pneumatic actuator, thus solve cylinder in prior art and be subject to piston impact, flimsy problem.
Shock-resistant cylinder in the present invention, comprising: piston, it is characterized in that, the one-sided or double sided frontal of described piston comprises: inner cavity.
In some embodiments, the front cover of described cylinder or the inner side of rear end cover also comprise: pressing aid axle, this pressing aid axle position is corresponding with the position of described inner cavity, external diameter is corresponding to the inner chamber of described inner cavity, the axial length of described pressing aid axle is less than the described inner cavity degree of depth, makes to form buffer cavity bottom described pressing aid shaft end and described inner cavity.
In some embodiments, described inner cavity is inward recess, and described inward recess is shoulder hole, and this shoulder hole comprises: bottom stage and seal section, and described bottom stage aperture is greater than seal section aperture.
In some embodiments, described pressing aid axle is multidiameter shaft, comprise: top shaft part and shaft part top, bottom shaft part external diameter corresponding to the aperture of the seal section of described inward recess, formation is connected, the length of described top shaft part is less than the bottom stage length of described inner cavity, and described bottom shaft part external diameter is less than described top shaft part external diameter.
In some embodiments, the sidewall of the bottom stage of described shoulder hole also comprises: inlet hole and unidirectional damping packing ring, and described unidirectional damping packing ring is fixed on described inlet hole, makes the cylinder chamber of described cylinder to described buffer cavity unilaterally connected; The sidewall of the seal section of described shoulder hole also comprises: air outlet hole, when the entirety of described pressing aid axle is positioned at described inward recess inside, described buffer cavity is communicated with described cylinder chamber.
In some embodiments, described piston is directly
time, the aperture of described inward recess is
time, hole depth is 107mm.
In some embodiments, the latus rectum of described inlet hole and air outlet hole is
In some embodiments, also comprise: pressing aid Simmer ring, the sidewall of described top shaft part comprises corresponding o-ring groove, and it is inner that described pressing aid Simmer ring is fixed on described o-ring groove.
In some embodiments, described front cover or rear end cover also comprise: vent, the inner space of described vent and described cylinder.
In some embodiments, the excessive place of described bottom stage and seal section circumferentially evenly arranges gas guide groove.
Compared with prior art, shock-resistant cylinder in the present invention has the following advantages: shock-resistant cylinder proposed by the invention, by increasing inner cavity on piston, when making piston movement to the both sides end cap of cylinder, " buffer cavity " is formed between piston and the side of end cap, thus " impact force " that decrease between piston and end cap, therefore, cylinder of the present invention has: structure is simple, be easy to realize, slow down steadily in movement process, cost is low, the advantages such as shock-absorbing capacity is good, thus reduce the many harm because piston impact end cap causes.Thus the many harm reduced because piston impact end cap causes, improve the serviceability of cylinder.
Accompanying drawing explanation
Fig. 1 is the composition structural representation of shock-resistant cylinder in the first mode of execution of the present invention;
Fig. 2 is the composition structural representation of shock-resistant cylinder in the second mode of execution of the present invention;
Fig. 3 is the close-up schematic view in the second mode of execution of the present invention when piston movement is one-sided to cylinder;
Fig. 4 is that in the third mode of execution of the present invention, shock-resistant cylinder is in close-up schematic view during a kind of working state;
Fig. 5 is that in the third mode of execution of the present invention, shock-resistant cylinder is in close-up schematic view during another kind of working state;
Fig. 6 is in the third mode of execution of the present invention, the close-up schematic view of the composition structural representation of another kind of shock-resistant cylinder;
Fig. 7 is that in the 4th kind of mode of execution of the present invention, shock-resistant cylinder is in close-up schematic view during a kind of working state;
Fig. 8 is that in the 4th kind of mode of execution of the present invention, shock-resistant cylinder is in close-up schematic view during another kind of working state;
Fig. 9 is in the 4th kind of mode of execution of the present invention, the schematic perspective view of piston in shock-resistant cylinder;
Figure 10 is in the 4th kind of mode of execution of the present invention, the partial structurtes enlarged view of another kind of shock-resistant cylinder;
Figure 11 is that the A of Figure 10 in a kind of mode of execution is to schematic diagram;
Figure 12 is that the A of Figure 10 in another kind of mode of execution is to schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, invention is described in further detail.
As shown in Figure 1, be the shock-resistant cylinder in the first mode of execution of the present invention.Front cover 11 and rear end cover 12 are separately fixed at the two ends of cylinder barrel 10, and piston 20 is assemblied in the inside of cylinder barrel 10, one end of piston rod 30 and is fixedly connected with piston 20.Wherein, the pressure surface 21 and/or ring surface 22 of piston 20 offering circular hole 40, namely forming inner cavity 40a (for all offering the diagram of circular hole 40 on pressure surface 21 and ring surface 22 shown in Fig. 1).The shape of its inner cavity 40a also can be offered according to concrete needs as square hole or different in nature hole.Piston 20 is fixedly connected with by setscrew nut 50 with piston rod 30, according to unequally loaded requirement, multiple Placement also can be adopted to connect, as Placements such as welding or riveted joints.
As shown in Figure 1, when piston 20 is to the one-sided motion of cylinder barrel 10, at pressure surface 21 and the front cover 11(of piston 20 or ring surface 22 and rear end cover 12) when will contact, after gas in inner cavity 40a is compressed instantaneously, at piston 20 and front cover 11(or rear end cover 12) between formed " air cavity ", thus opposition is produced to piston 20, reduce the pressure surface 21 of piston 20 and front cover 11(or ring surface 22 and rear end cover 12) between striking speed, reduce piston 20 and front cover 11(or ring surface 22 and rear end cover 12) between collision dynamics.Thus make piston to front cover 11(or rear end cover 12) collsion damage reduce, therefore, the serviceability of cylinder is improved.
For making piston 20 more steady when running to the two ends of cylinder, avoid the phenomenon of " shake " or " play " when running to two ends.In the second mode of execution of the present invention, as shown in Figure 2.The inner side of front cover 11 is provided with pressing aid axle 14, the inner side of rear end cover 12 is provided with pressing aid axle 13.The processing external diameter (cylindrical) of its pressing aid axle 13,14 is corresponding to the aperture of circular hole 40, and the processing axial length of pressing aid axle 13,14 is less than the hole depth of circular hole 40.As shown in Figure 3, when pressing aid axle 13(is illustrated as pressing aid axle 13) or after pressing aid axle 14 coordinates completely with circular hole 40, buffer cavity 40b can be formed on the end of pressing aid axle 13 or 14 and the bottom of inner cavity 40a.Thus, when at pressure surface 21 and the front cover 11(of piston 20 or ring surface 22 and rear end cover 12) when will contact, circular hole 40 elder generation on piston 20 ring surface 22 and the pressing aid axle 13 " docking " on rear end cover 12, leading role is served to piston 20, forms buffer cavity 40b gradually in the circular hole 40 i.e. bottom of inner cavity 40a.Therefore, avoid piston 20 when running to cylinder two ends, the generation of " shake " or " play " phenomenon produced, makes running state more stable.
For making the more steady of the operation of piston in moderating process, and good slowing effect can be ensured.As shown in Figure 4, in the third mode of execution of the present invention, circular hole 40 is shoulder hole, this shoulder hole comprises two sections, be respectively: bottom stage 41 and seal section 42, wherein the aperture of bottom stage 41 is greater than the aperture of seal section 42, that is, the bottom chamber 41a that bottom stage 41 is formed is greater than the Seal cage 42a that seal section 42 is formed.In one embodiment, corresponding pressing aid axle 13 and 14 also should be multidiameter shaft mutually, and this multidiameter shaft comprises two ends, be respectively: top shaft part 13a and bottom shaft part 13b, wherein, the external diameter of top shaft part 13a is corresponding to seal section 42 size of circular hole 40, and can form clearance fit relationship.The external diameter of bottom shaft part 13b is less than the external diameter of top shaft part 13a, and the length of top shaft part 13a is less than the length of the bottom stage 41 of inner cavity, thus buffer cavity can be made effectively to be formed.Therefore, when piston 20 moves to cylinder one-sided, the one-sided circular hole 40(of piston 20 and inner cavity 40a) in the process that progressively coordinates with the pressing aid axle 13 on front cover 11, the seal section 42 of circular hole 40 first matches with the top shaft part 13a of pressing aid axle 13, by gas seal in the bottom chamber 41a shown in Fig. 4, piston 20 is subject to the opposition of gas, reduces movement velocity.As shown in Figure 5, seal section 42 along with circular hole 40 progressively enters the bottom shaft part 13b of pressing aid axle 13, the bottom stage 41 of circular hole 40 matches with the top shaft part 13a of pressing aid axle 13, before it, the gas be trapped in bottom chamber 41a will be drained, circular hole 40 and pressing aid axle 13 realize coordinating completely, fit with the side of piston 20 and the inner side of front cover 11.Thus achieve the smooth running of piston 20 in moderating process, and good slowing effect can be ensured.As a kind of preferred version, when piston 20 diameter is
time, the diameter of circular hole 40 is preferably
hole depth is preferably 107mm.Thus more can ensure good slowing effect.For making in above-mentioned moderating process, effectively buffer cavity can be formed in bottom chamber 41a, as shown in Figure 6, for making, between the seal section 42 of circular hole 40 and pressing aid axle 13 top shaft part 13a, there is better sealing effect, therefore, the sidewall of top shaft part 13a also can be set up: o-ring groove 14, and in o-ring groove 14 fixed seal ring 15, thus make between the seal section 42 of circular hole 40 and pressing aid axle 13 top shaft part 13a, there is good sealing effect, its " buffer cavity " is more easily effectively formed, simultaneously, also the seal section 42 of circular hole 40 and the processes precision of pressing aid axle 13 top shaft part 13a can effectively be reduced, thus saved processing cost.
For making piston in motion speed faster process, still can ensure stable moderating process, avoiding the phenomenon generation of piston " spring ", " play ".Therefore in the 4th kind of mode of execution of the invention described above, as shown in Figure 7, unidirectional air damping device is also had additional at the sidewall of the bottom stage 41 of stepped circular hole 40, namely on the sidewall of bottom stage 41, inlet hole 43 is offered, and fix unidirectional damping packing ring 44 in the inner side of inlet hole 43, its unidirectional damping packing ring 44 is unidirectional damping packing ring, and the gas in bottom chamber 41a capable of blocking passes through the cylinder chamber of inlet hole 43 to cylinder to flowing, but the gas in cylinder chamber can be made to enter in bottom chamber 41a.In addition, for the gas accelerated in bottom chamber 41a is discharged, as shown in Figure 8, the sidewall of seal section 42 also offers air outlet hole 45, when pressing aid axle 13(or pressing aid axle 14) entirety be positioned at the inside of circular hole 40 after, bottom chamber 41a(can be made namely, buffer cavity) with cylinder chamber high-speed communication, thus make the gas be detained in bottom chamber 41a can fast evacuation.According to the difference of discharge amount, in one preferred embodiment of the invention, the latus rectum of inlet hole 43 and air outlet hole 45 can be preferably
therefore, better can ensure the formation of in bottom chamber 41a " air cavity ", and the gas fast evacuation in " air cavity " can be made.Thus make the moderating process of piston at cylinder two ends more steady, and the impact of motion speed can not be subject to.For making the gas be discharged in " air cavity " comparatively fast outwards discharge, the pressure in " air cavity " can't be made to raise, and front cover 11 or rear end cover 12 also offer vent 16, and vent 16 can make the inner chamber of cylinder be in communication with the outside.Thus ensure that the quick drain of gas.The piston 20(independence Knock-Down Component of said structure) schematic perspective view as shown in Figure 9.For making above-mentioned " air cavity " in discharge process, it is more steady that pressing aid axle 13 runs, even if all directions of pressing aid axle 13 are unanimously stressed, as as shown in Figure 10, Figure 11, Figure 12, excessive place 46 between bottom stage 41 and seal section 42, along the circumferential direction also evenly arrange gas guide groove 47, this gas guide groove 47 can be the parallel slot shown in Figure 11, and the width of its gas guide groove 47 can be preferably 1 ~ 3mm, 2 ~ 10mm.For increasing air guide speed, gas guide groove can also be the dovetail groove shown in Figure 12.Gas guide groove 47 realizes by the processes of boring or filing.
As shown from the above technical solution, the present invention by increasing inner cavity on piston, when making piston movement to the both sides end cap of cylinder, " buffer cavity " is formed between piston and the side of end cap, thus " impact force " that decrease between piston and end cap, therefore, cylinder of the present invention has: structure is simple, be easy to realize, slow down steadily in movement process, the advantages such as cost is low, and shock-absorbing capacity is good.And the many harm reduced because piston impact end cap causes, thus reduce the many harm because piston impact end cap causes, improve the serviceability of cylinder.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to the protection domain of invention.
Claims (10)
1. shock-resistant cylinder, comprising: piston, it is characterized in that, the one-sided or double sided frontal of described piston comprises: inner cavity.
2. shock-resistant cylinder according to claim 1, it is characterized in that, the front cover of described cylinder or the inner side of rear end cover also comprise: pressing aid axle, this pressing aid axle position is corresponding with the position of described inner cavity, external diameter is corresponding to the inner chamber of described inner cavity, the axial length of described pressing aid axle is less than the described inner cavity degree of depth, makes to form buffer cavity bottom described pressing aid shaft end and described inner cavity.
3. shock-resistant cylinder according to claim 1 and 2, is characterized in that, described inner cavity is inward recess, and described inward recess is shoulder hole, and this shoulder hole comprises: bottom stage and seal section, and described bottom stage aperture is greater than seal section aperture.
4. shock-resistant cylinder according to claim 3, it is characterized in that, described pressing aid axle is multidiameter shaft, comprise: top shaft part and shaft part top, bottom shaft part external diameter corresponding to the aperture of the seal section of described inward recess, formation is connected, the length of described top shaft part is less than the bottom stage length of described inner cavity, and described bottom shaft part external diameter is less than described top shaft part external diameter.
5. shock-resistant cylinder according to claim 4, it is characterized in that, the sidewall of the bottom stage of described shoulder hole also comprises: inlet hole and unidirectional damping packing ring, and described unidirectional damping packing ring is fixed on described inlet hole, makes the cylinder chamber of described cylinder to described buffer cavity unilaterally connected; The sidewall of the seal section of described shoulder hole also comprises: air outlet hole, when the entirety of described pressing aid axle is positioned at described inward recess inside, described buffer cavity is communicated with described cylinder chamber.
6. the shock-resistant cylinder according to claim 4 or 5, is characterized in that, described piston is directly
time, the aperture of described inward recess is
time, hole depth is 107mm.
7. shock-resistant cylinder according to claim 5, is characterized in that, the latus rectum of described inlet hole and air outlet hole is
8. the shock-resistant cylinder according to claim 2 or 4, is characterized in that, also comprise: pressing aid Simmer ring, and the sidewall of described top shaft part comprises corresponding o-ring groove, and it is inner that described pressing aid Simmer ring is fixed on described o-ring groove.
9. the shock-resistant cylinder according to claim 5 or 7, is characterized in that, described front cover or rear end cover also comprises: vent, the inner space of described vent and described cylinder.
10. shock-resistant cylinder according to claim 3, is characterized in that, the excessive place of described bottom stage and seal section circumferentially evenly arranges gas guide groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552016.9A CN104632753B (en) | 2013-11-08 | 2013-11-08 | Impact-resistant cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552016.9A CN104632753B (en) | 2013-11-08 | 2013-11-08 | Impact-resistant cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104632753A true CN104632753A (en) | 2015-05-20 |
| CN104632753B CN104632753B (en) | 2017-04-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310552016.9A Active CN104632753B (en) | 2013-11-08 | 2013-11-08 | Impact-resistant cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN104632753B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855620A (en) * | 2017-11-30 | 2018-03-30 | 苏州索力旺新能源科技有限公司 | Tin device on conducting strip in the production of terminal box paster |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835753A (en) * | 1972-09-19 | 1974-09-17 | A Bunyard | Air cylinder |
| US5193433A (en) * | 1989-05-24 | 1993-03-16 | Ab Mecman | Piston sealing and dampening device |
| CN201078367Y (en) * | 2007-08-16 | 2008-06-25 | 无锡亿利大机械有限公司 | Hydraulic oil cylinder with baffling buffer |
| CN101776105A (en) * | 2010-03-04 | 2010-07-14 | 合肥市力恒科技有限责任公司 | Single-acting piston type buffering hydraulic oil cylinder |
| CN103047218A (en) * | 2012-12-19 | 2013-04-17 | 徐州宇家医药科技有限公司 | Buffer hydraulic cylinder |
| CN204041608U (en) * | 2013-11-08 | 2014-12-24 | 航天长征化学工程股份有限公司 | Shock-resistant cylinder |
-
2013
- 2013-11-08 CN CN201310552016.9A patent/CN104632753B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3835753A (en) * | 1972-09-19 | 1974-09-17 | A Bunyard | Air cylinder |
| US5193433A (en) * | 1989-05-24 | 1993-03-16 | Ab Mecman | Piston sealing and dampening device |
| CN201078367Y (en) * | 2007-08-16 | 2008-06-25 | 无锡亿利大机械有限公司 | Hydraulic oil cylinder with baffling buffer |
| CN101776105A (en) * | 2010-03-04 | 2010-07-14 | 合肥市力恒科技有限责任公司 | Single-acting piston type buffering hydraulic oil cylinder |
| CN103047218A (en) * | 2012-12-19 | 2013-04-17 | 徐州宇家医药科技有限公司 | Buffer hydraulic cylinder |
| CN204041608U (en) * | 2013-11-08 | 2014-12-24 | 航天长征化学工程股份有限公司 | Shock-resistant cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855620A (en) * | 2017-11-30 | 2018-03-30 | 苏州索力旺新能源科技有限公司 | Tin device on conducting strip in the production of terminal box paster |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104632753B (en) | 2017-04-19 |
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