CN211231421U - Buffer oil cylinder - Google Patents
Buffer oil cylinder Download PDFInfo
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- CN211231421U CN211231421U CN201922074801.3U CN201922074801U CN211231421U CN 211231421 U CN211231421 U CN 211231421U CN 201922074801 U CN201922074801 U CN 201922074801U CN 211231421 U CN211231421 U CN 211231421U
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- flow passage
- cylinder
- oil
- cylinder bottom
- piston rod
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Abstract
The utility model discloses a buffer oil cylinder, including cylinder, cylinder bottom and piston rod, the piston rod is sealed to slide and set up in the cylinder, the cylinder bottom is fixed connection in the cylinder bottom, be formed with first oil pocket between piston rod and the cylinder bottom, be formed with the first oilhole that is linked together with first oil pocket on the cylinder bottom, the piston rod is formed with the tip towards the toper platform of cylinder bottom towards cylinder bottom one side, the cylinder bottom is formed with the cushion chamber towards one side of piston rod, the first oilhole is linked together with the cushion chamber, the toper platform holds and establishes in the cushion chamber; a first flow passage, a second flow passage and a check valve assembly are formed in the cylinder bottom, the first flow passage is communicated with the first oil cavity, the second flow passage is communicated with the buffer cavity, the first flow passage is connected with the second flow passage through the check valve assembly, and the check valve assembly blocks oil from flowing from the first flow passage to the second flow passage. The utility model has the characteristics of reduce return stroke noise and vibration.
Description
Technical Field
The utility model relates to a hydro-cylinder field, concretely relates to are buffer cylinder.
Background
When the existing oil cylinder returns, the piston rod and the bottom of the oil cylinder are lack of buffering, and the piston rod impacts the bottom of the oil cylinder to generate noise and vibration. The noise seriously affects the working environment of workers, causes damage to the health of the workers, and the vibration easily affects the service life of equipment.
In view of the above, the present inventors have made extensive studies on the above-mentioned drawbacks of the prior art, and have made this invention.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a cushion cylinder, which has the features of reducing the return noise and vibration.
In order to achieve the above purpose, the solution of the present invention is:
a buffer oil cylinder comprises a cylinder barrel, a cylinder bottom and a piston rod, wherein the piston rod is arranged in the cylinder barrel in a sealing and sliding mode, the cylinder bottom is fixedly connected to the bottom of the cylinder barrel, a first oil cavity is formed between the piston rod and the cylinder bottom, a first oil hole communicated with the first oil cavity is formed in the cylinder bottom, a conical table with the small end facing the cylinder bottom is formed on one side, facing the cylinder bottom, of the piston rod, a buffer cavity is formed on one side, facing the piston rod, of the cylinder bottom, the first oil hole is communicated with the buffer cavity, and the conical table is accommodated in the buffer cavity; a first flow passage, a second flow passage and a check valve assembly are formed in the cylinder bottom, the first flow passage is communicated with the first oil cavity, the second flow passage is communicated with the buffer cavity, the first flow passage is connected with the second flow passage through the check valve assembly, and the check valve assembly blocks oil from flowing from the first flow passage to the second flow passage.
Further, the check valve component comprises a spring and a steel ball, a mounting hole is formed in the cylinder bottom, the mounting hole is located at one end, away from the buffer cavity, of the second flow passage and is coaxially arranged with the second flow passage, the steel ball is arranged in the mounting hole, the spring abuts against one end, away from the second flow passage, of the steel ball, and the diameter of the steel ball is larger than that of the second flow passage; the first flow passage is communicated with the mounting hole.
Furthermore, the mounting hole is communicated with the outer side wall of the cylinder bottom, and a fixing plug is fixedly arranged in the mounting hole on one side, far away from the steel ball, of the spring.
Further, the conical table is a circular table, and the diameter of the large end of the conical table is the same as the inner diameter of the buffer cavity.
Further, a second oil cavity is formed in the piston rod and is axially arranged along the piston rod, an opening is formed in one side, facing the cylinder bottom, of the second oil cavity, a guide rod is fixedly arranged on the cylinder bottom, a through second oil hole is formed in the middle of the guide rod and is axially arranged along the guide rod, and the guide rod is connected with the second oil cavity in a sealing and sliding mode.
Furthermore, the buffer oil cylinder further comprises a connecting flange and an end cover, the connecting flange is fixedly connected to one end, far away from the cylinder bottom, of the cylinder barrel, the end cover is connected to one side, far away from the cylinder bottom, of the connecting flange, and the end cover is connected with the cylinder bottom through a plurality of connecting rods.
Furthermore, the connecting flange is provided with a vent hole, and the vent hole is communicated with the space between the outside and the outer wall of the piston rod and the inner wall of the cylinder barrel.
After the structure of the oil tank is adopted, the utility model relates to a buffer cylinder, it has following beneficial effect at least:
the piston rod return stroke final stage is characterized in that the conical table gradually enters the buffer cavity, the flow of a gap between the conical table and the inner wall of the buffer cavity is gradually reduced, the pressure of oil in the first oil cavity gradually rises, part of oil enters the first flow channel, the check valve assembly gradually plugs the oil channel of the first flow channel flowing to the second flow channel under the action of the oil of which the pressure gradually rises, so that the buffer of the final stage during the return stroke of the piston rod is realized, and the noise and the vibration of the piston rod return stroke final stage are reduced.
And in the initial stage of the process of the piston rod, oil enters the buffer cavity through the first oil hole, and part of the oil flows through the second flow passage, the check valve assembly and the first flow passage and acts in the first oil cavity to push the piston rod together with the oil in the buffer cavity.
Compared with the prior art, the utility model discloses a set up toper platform and cushion chamber and set up first runner, second runner and check valve subassembly and realize the buffering of piston rod return stroke final stage, reduce noise and vibration that the piston rod strikes the cylinder bottom and causes.
Drawings
Fig. 1 is the utility model relates to a schematic view of a sectional structure of a buffer cylinder when the return stroke is in place.
Fig. 2 is the utility model relates to a sectional structure schematic diagram of the buffer cylinder during the final stage of the return stroke.
Fig. 3 to 5 are schematic perspective views of the present invention.
Fig. 6 is an enlarged schematic view of a portion a in fig. 2.
In the figure:
a cylinder barrel 1; a first oil chamber 11;
a cylinder bottom 2; the first oil hole 21; a buffer chamber 22; a first flow channel 23; a second flow passage 24; mounting holes 25; a fixing plug 251;
a piston rod 3; a conical table 31; a second oil chamber 32;
a check valve assembly 4; a spring 41; steel balls 42;
a guide rod 5; the second oil hole 51;
an end cap 7; a connecting rod 71.
Detailed Description
In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following embodiments.
As shown in fig. 1 to 6, it is a buffer cylinder related to the present invention, including a cylinder barrel 1, a cylinder bottom 2 and a piston rod 3, the piston rod 3 is disposed in the cylinder barrel 1 in a sealing and sliding manner, the cylinder bottom 2 is fixedly connected to the bottom of the cylinder barrel 1, a first oil chamber 11 is formed between the piston rod 3 and the cylinder bottom 2, a first oil hole 21 communicated with the first oil chamber 11 is formed on the cylinder bottom 2, a conical table 31 with a small end facing the cylinder bottom 2 is formed on one side of the piston rod 3 facing the cylinder bottom 2, and a buffer chamber 22 is formed on one side of the cylinder bottom 2 facing the piston rod 3; preferably, the conical table 31 is a circular table, and the diameter of the large end of the conical table 31 is the same as the inner diameter of the buffer cavity 22.
The first oil hole 21 is communicated with the buffer cavity 22, and the conical table 31 is accommodated in the buffer cavity 22; a first flow passage 23, a second flow passage 24 and a check valve assembly 4 are formed in the cylinder bottom 2, the first flow passage 23 is communicated with the first oil chamber 11, the second flow passage 24 is communicated with the buffer chamber 22, the first flow passage 23 is connected with the second flow passage 24 through the check valve assembly 4, and the check valve assembly 4 prevents oil from flowing from the first flow passage 23 to the second flow passage 24.
Thus, the utility model relates to a buffer cylinder, 3 return final stages of piston rod, toper platform 31 enters into gradually extremely in the cushion chamber 22, the fluid that has reduced in the first oil pocket 11 gradually passes through toper platform 31 with the flow in clearance between the cushion chamber 22 inner wall, the pressure of the fluid in the first oil pocket 11 risees gradually, and partial fluid gets into to first runner 23 in, check valve subassembly 4 is under the fluid effect that pressure risees gradually with the complete shutoff of the oil duct of first runner 23 flow direction second runner 24 gradually, the buffering of final stages when so realizing 3 return strokes of piston rod to the noise and the vibration of 3 return final stages of piston rod have been reduced.
In the initial stage of the process of the piston rod 3, oil enters the buffer cavity 22 through the first oil hole 21, and part of the oil also flows through the second flow passage 24, the check valve assembly 4 and the first flow passage 23, and acts in the first oil cavity 11 to push the piston rod 3 together with the oil in the buffer cavity 22.
Preferably, as shown in fig. 6, the check valve assembly 4 includes a spring 41 and a steel ball 42, a mounting hole 25 is formed on the cylinder bottom 2, the mounting hole 25 is located at an end of the second flow passage 24 away from the buffer cavity 22 and is coaxially arranged with the second flow passage 24, the steel ball 42 is arranged in the mounting hole 25, the spring 41 abuts against an end of the steel ball 42 away from the second flow passage 24, and a diameter of the steel ball 42 is larger than a diameter of the second flow passage 24; the first flow passage 23 communicates with the mounting hole 25. Along with the gradual increase of the oil pressure in the first oil chamber 11, the steel ball 42 gradually seals the gap between the mounting hole 25 and the second flow passage 24 under the action of the oil pressure. When the pressure difference between the second flow passage 24 and the first flow passage 23 is enough to offset the pressure of the spring 41, the steel ball 42 is lifted up, and the oil can flow to the first flow passage 23 through the second flow passage 24. The stroke of the last return stage of the piston rod 3 is short, and when the steel ball 42 closes the second flow passage 24 from the beginning of flow limiting to the complete sealing, the conical table 31 of the piston rod 3 gradually enters into the buffer cavity 22 completely.
Preferably, the first flow passage 23, the second flow passage 24 and the check valve assembly 4 are provided on the cylinder bottom 2 at an interval of 180 degrees from the first oil hole 21. Thus, the first flow path 23 and the first oil hole 21 are located at relatively distant positions to avoid mutual influence.
Preferably, in order to facilitate the installation of the steel ball 42 and the spring 41, the installation hole 25 is communicated with the outer side wall of the cylinder bottom 2, and a fixed plug 251 is fixedly arranged in the installation hole 25 at the side of the spring 41 far away from the steel ball 42. The fixing plug 251 and the mounting hole 25 may be connected by a screw thread or an interference fit.
Preferably, a second oil chamber 32 is formed in the piston rod 3 in the axial direction of the piston rod 3, an opening is formed in one side, facing the cylinder bottom 2, of the second oil chamber 32, a guide rod 5 is fixedly arranged on the cylinder bottom 2, a through second oil hole 51 is formed in the middle of the guide rod 5 in the axial direction of the guide rod 5, and the guide rod 5 is connected with the second oil chamber 32 in a sealing and sliding manner. When the piston rod is used, the second oil hole 51 is pressurized to feed oil into the second oil chamber 32, the first oil hole 21 also feeds oil into the first oil chamber 11 to jointly drive the piston rod 3 to advance to prop against materials, and finally the first oil hole 21 continues to feed oil into the first oil chamber 11 to perform secondary pressurization.
Preferably, the buffer oil cylinder further comprises a connecting flange 6 and an end cover 7, the connecting flange 6 is fixedly connected to one end, far away from the cylinder bottom 2, of the cylinder barrel 1, the end cover 7 is connected to one side, far away from the cylinder bottom 2, of the connecting flange 6, and the end cover 7 is connected with the cylinder bottom 2 through a plurality of connecting rods 71. The connecting rod 71 axially tightens the end cover 7 and the cylinder bottom 2 assembly, so as to connect the cylinder bottom 2 with the cylinder barrel 1, and connect the flange with the cylinder barrel 1.
In order to reduce the influence of air between the outer wall of the piston rod 3 and the inner wall of the cylinder barrel 1 on the advancing and retreating of the piston rod 3, preferably, a vent hole 61 is arranged on the connecting flange 6, and the vent hole 61 is communicated with the space between the outside and the outer wall of the piston rod 3 and the inner wall of the cylinder barrel 1. When the piston rod 3 advances, air is discharged through the vent hole 61, and when the piston rod 3 retreats, air enters between the outer wall of the piston rod 3 and the inner wall of the cylinder barrel 1 through the vent hole 61.
Compared with the prior art, the utility model discloses a set up toper platform 31 and cushion chamber 22 and set up first runner 23, second runner 24 and check valve subassembly 4 and realize the buffering of 3 return strokes final stages of piston rod, reduce noise and vibration that piston rod 3 strikeed the cylinder bottom 2 and cause.
The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should not be construed as departing from the scope of the present invention.
Claims (7)
1. A buffer oil cylinder comprises a cylinder barrel, a cylinder bottom and a piston rod, wherein the piston rod is arranged in the cylinder barrel in a sealing and sliding mode, the cylinder bottom is fixedly connected to the bottom of the cylinder barrel, a first oil cavity is formed between the piston rod and the cylinder bottom, and a first oil hole communicated with the first oil cavity is formed in the cylinder bottom; a first flow passage, a second flow passage and a check valve assembly are formed in the cylinder bottom, the first flow passage is communicated with the first oil cavity, the second flow passage is communicated with the buffer cavity, the first flow passage is connected with the second flow passage through the check valve assembly, and the check valve assembly blocks oil from flowing from the first flow passage to the second flow passage.
2. The cushion cylinder of claim 1, wherein the check valve assembly comprises a spring and a steel ball, a mounting hole is formed in the cylinder bottom, the mounting hole is located at one end, away from the cushion cavity, of the second flow passage and is coaxial with the second flow passage, the steel ball is arranged in the mounting hole, the spring abuts against one end, away from the second flow passage, of the steel ball, and the diameter of the steel ball is larger than that of the second flow passage; the first flow passage is communicated with the mounting hole.
3. The cushion cylinder of claim 2, wherein the mounting hole is communicated with the outer side wall of the cylinder bottom, and a fixing plug is fixedly arranged in the mounting hole on one side of the spring away from the steel ball.
4. The cushion cylinder of claim 1, wherein the tapered table is a circular truncated cone, and the diameter of the large end of the tapered table is the same as the inner diameter of the cushion chamber.
5. The cushion cylinder as claimed in claim 1, wherein the piston rod is provided with a second oil chamber disposed along the axial direction of the piston rod, the second oil chamber is provided with an opening on a side facing the cylinder bottom, a guide rod is fixedly disposed on the cylinder bottom, a second oil hole is disposed at the middle part of the guide rod and is disposed axially through the guide rod, and the guide rod is connected with the second oil chamber in a sealing and sliding manner.
6. The cushion cylinder according to claim 5, wherein the cushion cylinder further comprises a connecting flange and an end cover, the connecting flange is fixedly connected to one end of the cylinder barrel, which is far away from the cylinder bottom, the end cover is connected to one side, which is far away from the cylinder bottom, of the connecting flange, and the end cover is connected with the cylinder bottom through a plurality of connecting rods.
7. The cushion cylinder of claim 6, wherein the connecting flange is provided with a vent hole, and the vent hole is communicated with the space between the outside and the outer wall of the piston rod and the inner wall of the cylinder barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922074801.3U CN211231421U (en) | 2019-11-27 | 2019-11-27 | Buffer oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922074801.3U CN211231421U (en) | 2019-11-27 | 2019-11-27 | Buffer oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211231421U true CN211231421U (en) | 2020-08-11 |
Family
ID=71924742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922074801.3U Active CN211231421U (en) | 2019-11-27 | 2019-11-27 | Buffer oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211231421U (en) |
-
2019
- 2019-11-27 CN CN201922074801.3U patent/CN211231421U/en active Active
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