CN112576570A - Bearing air pressure bar - Google Patents
Bearing air pressure bar Download PDFInfo
- Publication number
- CN112576570A CN112576570A CN202011299855.0A CN202011299855A CN112576570A CN 112576570 A CN112576570 A CN 112576570A CN 202011299855 A CN202011299855 A CN 202011299855A CN 112576570 A CN112576570 A CN 112576570A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- cylinder
- piston
- bearing
- piston rod
- 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.)
- Pending
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Classifications
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- 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
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
- A47C7/004—Chair or stool bases for chairs or stools with central column, e.g. office chairs
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- 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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
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- 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
- F15B15/1471—Guiding means other than in the end cap
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention discloses a bearing air pressure bar, which comprises an outer support thick cylinder, a guide insertion cylinder and an inner bearing thin cylinder which are sequentially connected, wherein the inner bearing thin cylinder comprises an outer sleeve and a piston inner sleeve fixed on the inner wall of the outer sleeve, a movable piston is arranged in the piston inner sleeve, the piston is connected with one end of a piston rod, a sealing ring assembly is arranged at the other end of the piston rod and is positioned between the outer sleeve and the piston inner sleeve, and the sealing ring assembly comprises a first sealing ring and a second sealing ring which are axially arranged along the piston rod and are attached to each other. According to the invention, the first sealing ring and the second sealing ring are arranged on the piston rod, so that the two sealing rings are matched for sealing protection in the reciprocating movement process of the extending end of the piston rod, namely, the double-insurance mode is adopted, and the problem that effective sealing cannot be carried out after the piston rod is damaged and leaks air due to the arrangement of a single sealing ring is avoided.
Description
Technical Field
The invention relates to the technical field of swivel chair manufacturing, in particular to a bearing air pressure rod.
Background
At present, in the existing revolving chair structure, a pneumatic rod is an important component for realizing the functions of lifting and height adjustment of the revolving chair; the air pressure bar product is arranged below a chair cushion for height adjustment, and the existing air pressure bar still has a plurality of problems, such as poor air tightness and easy air leakage in the using process; secondary problems are poor stability after connection and low manufacturing yield, requiring secondary processing. In order to improve the sealing performance of the air pressure rod, further improvement on the air pressure rod in the prior art is needed.
Disclosure of Invention
The invention aims to provide the bearing air pressure bar which has good sealing performance, is convenient to manufacture and has high manufacturing qualification rate aiming at the defects and the defects of the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a bearing air pressure bar, which comprises an outer supporting thick cylinder, a guiding inserting cylinder and an inner bearing thin cylinder which are sequentially connected, wherein the inner bearing thin cylinder comprises an outer sleeve and a piston inner sleeve fixed on the inner wall of the outer sleeve; and a sealing ring assembly is arranged at the other end of the piston rod and is positioned between the outer sleeve and the inner sleeve of the piston, and the sealing ring assembly comprises a first sealing ring and a second sealing ring which are axially arranged along the piston rod and are attached to each other.
Preferably, the outer sleeve comprises a straight cylinder section and a conical cylinder section which are connected, the straight cylinder section is located in the guide insertion cylinder, the diameter of the large-diameter end of the conical cylinder section is the same as that of one end of the straight cylinder section, and the length of the conical cylinder section is 51-55 mm.
Preferably, the length of the conical barrel section is 53 mm.
Preferably, the diameter of the first sealing ring is smaller than that of the second sealing ring, a stepped structure is arranged at the other end of the straight cylinder section, and the second sealing ring abuts against the end part of the opening clamp holder.
Preferably, the wall thickness of the outer sleeve is 3 mm.
Preferably, the tube seat is an aluminum alloy piece.
Preferably, an annular clamping groove is formed in the outer wall of the guide inserting cylinder and is clamped with a tooth beating structure on the outer support thick cylinder.
Preferably, the length of the guide plug cylinder is 80 mm.
Compared with the prior art, the invention has the following beneficial effects:
1. in the bearing air pressure rod provided by the invention, the first sealing ring and the second sealing ring are arranged on the piston rod, so that the protruding end of the piston rod is matched with the two sealing rings for sealing protection in the reciprocating movement process, namely, the problem that effective sealing cannot be carried out after the piston rod is damaged and air leakage is caused by arranging a single sealing ring is solved through a double-insurance mode.
2. In the bearing air pressure rod provided by the invention, the length of the conical cylinder section is set to be 51-55 mm, preferably 53mm, so that the depth of the air pressure rod inserted into the seat connecting piece is increased, and the connection stability of the air pressure rod and the seat connecting piece is enhanced;
3. in the bearing air pressure rod provided by the invention, a step structure is arranged at the straight cylinder section or the outer sleeve close to the extending end of the piston rod, and two sealing rings with different diameters are arranged at the step structure, namely, the problem that the same position of the sealing ring which is not damaged is damaged due to the same reason is solved by reducing and constructing the sealing rings with different diameters;
4. in the bearing air pressure bar provided by the invention, the tube seat is made of aluminum alloy, so that the tube seat is machined or machined by a machining center, the dimensional accuracy of the tube seat is ensured, and meanwhile, the surface defects of a metal piece are fewer than those of an injection molding plastic piece, so that the matching accuracy with the inner sleeve of the piston can be ensured, and the connection air tightness is enhanced;
5. in the bearing air pressure bar provided by the invention, the annular clamping groove is arranged on the outer wall of the guide insertion cylinder, so that the annular clamping groove replaces a local clamping groove in the prior art, the problem that the local clamping groove is easy to align in the clamping process is avoided, and the connection accuracy is ensured; furthermore, the length of the guide insertion cylinder is set to be 80mm, so that the guide length is increased, and the movement stability of the inner bearing thin cylinder is improved; of course, the length characteristics can be matched with the length characteristics of the conical cylinder section, and the overall stability of the bearing air pressure rod is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the whole structure of the load-bearing air pressure bar of the present invention;
FIG. 2 is a schematic view of another alternative construction of the inner load-bearing cartridge of FIG. 1;
the device comprises an outer support thick cylinder 1, a guide insertion cylinder 2, an outer sleeve 3, a piston inner sleeve 4, an opening clamp 5, a tube seat 6, a piston 7, an opening and closing pin 8, a first sealing ring 9, a second sealing ring 10, an annular clamping groove 11 and a piston rod 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide the bearing air pressure bar which has good sealing performance, is convenient to manufacture and has high manufacturing qualification rate aiming at the defects and the defects of the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, the invention provides a bearing air pressure bar, which comprises an outer support thick cylinder 1, a guide insertion cylinder 2 and an inner bearing thin cylinder which are connected in sequence, wherein the inner bearing thin cylinder comprises an outer sleeve 3 and a piston inner sleeve 4 fixed on the inner wall of the outer sleeve 3, the guide insertion cylinder 2 is inserted into and fixed at one end of the outer support thick cylinder 1, the outer sleeve 3 is movably and movably connected with the guide insertion cylinder 2, two ends of the piston inner sleeve 4 are respectively provided with an opening clamp 5 and a pipe seat 6, a movable piston 7 is arranged inside the piston inner sleeve 4, the piston 7 is connected with one end of a piston rod 12, the other end of the piston rod 12 is connected with the opening clamp 5 in a matching manner and extends into and is connected into the outer support thick cylinder 1, and an opening and closing pin 8 is arranged; a sealing ring assembly is arranged at the other end of the piston rod 12 and is positioned between the outer sleeve 3 and the piston inner sleeve 4, and the sealing ring assembly comprises a first sealing ring 9 and a second sealing ring 10 which are axially arranged along the piston rod 12 and are attached to each other; the opening clamp 5 and the opening and closing pin 8 are devices existing in the prior art, and the specific structure thereof is not described herein; the opening clamp 5 and the tube seat 6 are hermetically connected with the piston inner sleeve 4, for example, a sealing ring is arranged; the outer side of the first sealing ring 9 is also provided with a pressing part, similar conventional structures in the existing air pressure rod can be applied to the invention, and the invention adopts a mode of arranging the first sealing ring 9 and the second sealing ring 10 on the piston rod 12, so that the protruding end of the piston rod 12 is matched with the two sealing rings for sealing protection in the reciprocating movement process, namely, the problem that effective sealing cannot be carried out after the single sealing ring is arranged and damaged and leaks air is avoided by a double-insurance mode.
The outer sleeve 3 comprises a straight cylinder section and a conical cylinder section which are connected, the straight cylinder section is positioned in the guide insertion cylinder 2, the diameter of the large-diameter end of the conical cylinder section is the same as that of one end of the straight cylinder section, and the length of the conical cylinder section is 51-55 mm. Further, the length of the conical barrel section is 53 mm. The length of the conical cylinder section is set to be 51-55 mm, and the mode of 53mm is preferable, so that the depth of the air pressure rod inserted into the seat connecting piece is increased, and the connection stability of the air pressure rod and the seat connecting piece is enhanced.
As a deformation structure, in order to enhance the sealing performance of the extending end of the piston rod 12, the diameter of the first sealing ring 9 is smaller than that of the second sealing ring 10, the other end of the straight cylinder section is provided with a stepped structure, and the second sealing ring 10 abuts against the end part of the opening clamp holder 5; the mode that a step structure is arranged at a straight cylinder section or at the extending end of the outer sleeve 3 close to the piston rod 12 and two sealing rings with different diameters are arranged at the step structure is adopted, namely, the problem that the same position of the sealing ring which is not damaged is damaged due to the same reason is solved by the mode that the diameter of the sealing ring is changed and the sealing ring with different diameters is structured.
In order to ensure the compression resistance and avoid the cylinder explosion problem, the wall thickness of the outer sleeve 3 is optimized to be 3mm from the wall thickness of 2mm in the prior art.
In the invention, the tube seat 6 is an aluminum alloy part; the adoption sets up the material of tube socket 6 into the mode of aluminum alloy for tube socket 6 guarantees tube socket 6's dimensional accuracy through the mode of machining or machining center processing, and the surface defect of metalwork compares also still less in the surface defect of the working of plastics of moulding plastics simultaneously, can guarantee with the cooperation precision of piston inner skleeve 4, thereby the reinforcing is connected the gas tightness.
The outer wall of the guide insertion cylinder 2 is provided with an annular clamping groove 11, and the annular clamping groove 11 is clamped with a tooth striking structure on the outer support thick cylinder 1, wherein the tooth striking structure is a conventional process in the prior art; according to the invention, the annular clamping groove 11 is arranged on the outer wall of the guide insertion cylinder 2, so that the annular clamping groove 11 replaces a local clamping groove in the prior art, the problem that the local clamping groove is easy to align in the clamping process is avoided, and the connection accuracy is ensured.
The length of the guide insertion cylinder 2 is 80 mm; namely, the length of the guide inserting cylinder 2 is set to be 80mm, so that the guide length is increased, and the movement stability of the inner bearing thin cylinder is improved; of course, the length characteristics can be matched with the length characteristics of the conical cylinder section, and the overall stability of the bearing air pressure rod is further improved.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A bearing air pressure bar is characterized by comprising an outer supporting thick cylinder, a guiding inserting cylinder and an inner bearing thin cylinder which are sequentially connected, wherein the inner bearing thin cylinder comprises an outer sleeve and a piston inner sleeve fixed on the inner wall of the outer sleeve; and a sealing ring assembly is arranged at the other end of the piston rod and is positioned between the outer sleeve and the inner sleeve of the piston, and the sealing ring assembly comprises a first sealing ring and a second sealing ring which are axially arranged along the piston rod and are attached to each other.
2. The load-bearing air pressure bar according to claim 1, wherein the outer sleeve comprises a straight cylinder section and a conical cylinder section which are connected, the straight cylinder section is positioned in the guide insertion cylinder, the diameter of the large-diameter end of the conical cylinder section is the same as that of one end of the straight cylinder section, and the length of the conical cylinder section is 51-55 mm.
3. The load-bearing gas pressure bar of claim 2, wherein the length of the conical barrel section is 53 mm.
4. The load-bearing gas pressure bar according to claim 1 or 2, wherein the diameter of the first sealing ring is smaller than that of the second sealing ring, and the other end of the straight cylinder section is provided with a stepped structure, and the second sealing ring abuts against the end of the opening holder.
5. The load-bearing gas cylinder according to claim 1 or 2, wherein the wall thickness of the outer sleeve is 3 mm.
6. The load-bearing gas cylinder according to claim 1, wherein the tube seat is an aluminum alloy member.
7. The load-bearing air pressure bar as claimed in claim 1, wherein an annular clamping groove is arranged on the outer wall of the guide insertion cylinder, and the annular clamping groove is clamped with the tooth striking structure on the outer support thick cylinder.
8. The load-bearing pneumatic bar of claim 7, wherein said guide insert cylinder is 80mm in length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011299855.0A CN112576570A (en) | 2020-11-19 | 2020-11-19 | Bearing air pressure bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011299855.0A CN112576570A (en) | 2020-11-19 | 2020-11-19 | Bearing air pressure bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112576570A true CN112576570A (en) | 2021-03-30 |
Family
ID=75123343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011299855.0A Pending CN112576570A (en) | 2020-11-19 | 2020-11-19 | Bearing air pressure bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112576570A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200968338Y (en) * | 2006-10-31 | 2007-10-31 | 福隆尖端科技股份有限公司 | Air pressure bar |
| CN101810409A (en) * | 2009-02-19 | 2010-08-25 | 上海阿旺特家具有限公司 | Improved structure of office chair |
| CN203498003U (en) * | 2013-10-12 | 2014-03-26 | 青岛三弘精密器械有限公司 | Gas spring of lifting seat |
| CN203796663U (en) * | 2014-04-23 | 2014-08-27 | 宁波以赛亚气动成套有限公司 | Anti-falling air cylinder |
| DE102013212224A1 (en) * | 2013-06-26 | 2014-12-31 | Robert Bosch Gmbh | Hydraulic cylinder with piston rod |
| CN104665319A (en) * | 2015-03-18 | 2015-06-03 | 常州市莱特气弹簧有限公司 | Automatic rotating air pressure rod |
| CN104687821A (en) * | 2015-03-18 | 2015-06-10 | 常州市莱特气弹簧有限公司 | Automatic whirling and raising air pressure rod |
| CN206816592U (en) * | 2017-06-14 | 2017-12-29 | 青岛奥德精密器械有限公司 | A kind of double-deck scale-up version air pressure rod |
| CN109290997A (en) * | 2018-10-29 | 2019-02-01 | 武汉船用机械有限责任公司 | The installation method of the piston seal of dual-rod hydraulic cylinder |
| CN208686873U (en) * | 2018-08-31 | 2019-04-02 | 重庆渝安创新科技有限公司 | The split type coil combination of damper |
-
2020
- 2020-11-19 CN CN202011299855.0A patent/CN112576570A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200968338Y (en) * | 2006-10-31 | 2007-10-31 | 福隆尖端科技股份有限公司 | Air pressure bar |
| CN101810409A (en) * | 2009-02-19 | 2010-08-25 | 上海阿旺特家具有限公司 | Improved structure of office chair |
| DE102013212224A1 (en) * | 2013-06-26 | 2014-12-31 | Robert Bosch Gmbh | Hydraulic cylinder with piston rod |
| CN203498003U (en) * | 2013-10-12 | 2014-03-26 | 青岛三弘精密器械有限公司 | Gas spring of lifting seat |
| CN203796663U (en) * | 2014-04-23 | 2014-08-27 | 宁波以赛亚气动成套有限公司 | Anti-falling air cylinder |
| CN104665319A (en) * | 2015-03-18 | 2015-06-03 | 常州市莱特气弹簧有限公司 | Automatic rotating air pressure rod |
| CN104687821A (en) * | 2015-03-18 | 2015-06-10 | 常州市莱特气弹簧有限公司 | Automatic whirling and raising air pressure rod |
| CN206816592U (en) * | 2017-06-14 | 2017-12-29 | 青岛奥德精密器械有限公司 | A kind of double-deck scale-up version air pressure rod |
| CN208686873U (en) * | 2018-08-31 | 2019-04-02 | 重庆渝安创新科技有限公司 | The split type coil combination of damper |
| CN109290997A (en) * | 2018-10-29 | 2019-02-01 | 武汉船用机械有限责任公司 | The installation method of the piston seal of dual-rod hydraulic cylinder |
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