CN203743588U - Gear shaft assembly of pneumatic actuator - Google Patents
Gear shaft assembly of pneumatic actuator Download PDFInfo
- Publication number
- CN203743588U CN203743588U CN201420034755.9U CN201420034755U CN203743588U CN 203743588 U CN203743588 U CN 203743588U CN 201420034755 U CN201420034755 U CN 201420034755U CN 203743588 U CN203743588 U CN 203743588U
- Authority
- CN
- China
- Prior art keywords
- gear shaft
- pneumatic actuator
- bearing housing
- shaft assembly
- annular
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to the technical field of pneumatic actuators, in particular to a gear shaft assembly of a pneumatic actuator. The gear shaft assembly comprises a gear shaft, wherein an upper gear and a lower gear are arranged in the middle of the gear shaft in a spaced mode, an annular bearing groove for installation of a bearing is formed in the tail portion of the gear shaft, the head portion of the gear shaft is sleeved with a bearing bush and a planar shaft sleeve, the portion, between the bearing bush and the planar shaft sleeve, of the gear shaft is sleeved with an O-shaped ring, and the shaft diameter of the portion, sleeved with the bearing bush, of the gear shaft, the shaft diameter of the portion, sleeved with the planar shaft sleeve, of the gear shaft and the shaft diameter of the portion, sleeved with the O-shaped ring, of the gear shaft are equal. The gear shaft assembly of the pneumatic actuator has the advantages of being good in sealing performance and wear-resistant effect and long in service life.
Description
Technical field
The utility model relates to the technical field of pneumatic actuator, especially relates to a kind of pneumatic actuator gear shaft assembly.
Background technique
Valve used pneumatic actuator is the one of final controlling element, and it utilizes source of the gas drive the unlatching of actuator or close, with the flow of control media.Pneumatic actuator comprises cylinder block and is arranged on the left and right end cap at cylinder block two ends, about cylinder block is interior, is respectively equipped with piston, between left and right piston, is provided with gear shaft.Left and right piston is connected by rack and pinion axle, and gear shaft is connected with valve, and gear shaft can rotate forward or backwards under the drive of left and right piston, and then drives valve opening or close.The sealing effect of the gear shaft of at present traditional pneumatic actuator is poor, head position on gear shaft is provided with circular groove, seal ring is installed in circular groove, when gear shaft is assembled, its seal ring and cylinder body form hermetic seal, but in long-term using process, between seal ring and cylinder body in the process of motive sealing, can wear and tear, the phenomenon of gas leakage easily occurs, and its head is provided with bearing housing, long-term situation about using in the groove of the downside of circular groove, the bearing housing degree of wear is very big, also very big to the damage of Component and cylinder body.
Summary of the invention
The deficiency existing for above-mentioned prior art, the purpose of this utility model is to provide a kind of good seal performance, wear-resisting effective, and the pneumatic actuator gear shaft assembly of long service life.
For realizing above-mentioned object, the utility model provides following technological scheme:
A kind of pneumatic actuator gear shaft assembly, comprise gear shaft, the middle part of gear shaft is provided with the spaced gear of upper and lower two circle, the afterbody of gear shaft is provided with bearings mounted annular bearing groove, the head of gear shaft is arranged with bearing housing and flat bush, on gear shaft between bearing housing and flat bush, be arranged with O type circle, described in be arranged with the gear shaft at bearing housing, flat bush and O type circle place the diameter of axle all equate, adopt slotless floating sealing.
The utility model is further set to: the axial length of described bearing housing be not less than the exterior cylinder body being in contact with it wall thickness 2/3.
The utility model is further set to: the inwall of described bearing housing is or/and be provided with the spiral chute that connects upper and lower end face on outer wall.
The utility model is further set to: the lower end of described bearing housing and the upper end of flat bush are provided with the bulge loop that outside flange forms, and the bulge loop upper wall of bearing housing and the bulge loop lower wall of flat bush are connected on the exterior cylinder body at axis hole place of mounting teeth wheel shaft on lower wall.
The utility model is further set to: the downside of the annular bearing groove of the afterbody of described gear shaft is provided with the circular groove of mounting O-shaped rings.
The utility model is further set to: the annular boss that is provided with isolation two grooves between described circular groove and annular bearing groove.
The utility model is further set to: the external diameter of described annular boss is not more than the external diameter of annular bearing groove or circular groove.
By adopting technique scheme, the technique effect that the utility model reaches is:
Its sheathed bearing housing, the diameter of axle part of the head of the gear shaft of flat bush and O type circle all equates, after bearing housing and planar axes are enclosed within and install, its O type circle can slidably reciprocate on the gear shaft between bearing housing and flat bush, adopt the mode of floating sealing to strengthen sealability, the axial length that bearing housing is separately set be not less than the exterior cylinder body being in contact with it wall thickness 2/3, so just increase the rubbing surface of bearing support with respect to cylinder body, strengthen wear-resisting property, and on bearing housing, offer from the bottom to top screw type spiral chute, make the gas in cylinder body pass to bearing housing upper end, along with O type circle long term wear, the gas leading to up from bearing housing can carry out gas to O type circle and exert pressure, make O type circle be pressed into flat, all the time can contact closely with cylinder body, sealability strengthens, and also increase greatly the working life of O type circle.
Brief description of the drawings
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the structural representation of gear shaft of the present utility model.
Fig. 2 is the cross-sectional view being assemblied in cylinder body of the present utility model.
Fig. 3 is the structural representation of bearing housing of the present utility model.
Specific embodiment
As shown in Figure 1 to Figure 3, for the disclosed a kind of pneumatic actuator gear shaft assembly of the utility model, comprise gear shaft 10, the middle part of gear shaft 10 is provided with, the spaced gear 11 of lower two circle, the afterbody of gear shaft 10 is provided with bearings mounted annular bearing groove 12, the head of gear shaft 10 is arranged with bearing housing 20 and flat bush 30, on gear shaft 10 between bearing housing 20 and flat bush 30, be arranged with O type circle 40, the described bearing housing 20 that is arranged with, the diameter of axle of the gear shaft 10 at flat bush 30 and O type circle 40 places all equates, the diameter of axle that is one section of axle of head of gear shaft 10 equates, adopt slotless floating sealing, the sheathed upper bearing sleeve 20 of difference on this section of equal diameter of axle, flat bush 30 and O type circle 40, after bearing housing and planar axes are enclosed within and install, its O type circle can have certain space to slidably reciprocate on the gear shaft between bearing housing and flat bush.
In above-mentioned, as shown in Figure 3, the axial length L 1 of described bearing housing 20 be not less than the exterior cylinder body 21 being in contact with it wall thickness L2 2/3.The inwall of described bearing housing 20 is or/and be provided with the spiral chute 22 that connects upper and lower end face on outer wall.
In above-mentioned, as shown in Figure 2, the upper end of the lower end of described bearing housing 20 and flat bush 30 is provided with the bulge loop that outside flange forms, and the bulge loop upper wall of bearing housing and the bulge loop lower wall of flat bush are connected on the exterior cylinder body at axis hole place of mounting teeth wheel shaft on lower wall.
In above-mentioned, the downside of the annular bearing groove 12 of the afterbody of described gear shaft 10 is provided with the circular groove 50 of mounting O-shaped rings 40.Between circular groove 50 and annular bearing groove 12, be provided with the annular boss 60 of isolation two grooves.The external diameter of annular boss 60 is not more than the external diameter of annular bearing groove 12 or circular groove 50.
Above-described embodiment is only preferred embodiment of the present utility model, not limits according to this protection domain of the present utility model, therefore: all equivalences of doing according to structure of the present utility model, shape, principle change, within all should being covered by protection domain of the present utility model.
Claims (7)
1. a pneumatic actuator gear shaft assembly, comprise gear shaft, the middle part of gear shaft is provided with the spaced gear of upper and lower two circle, the afterbody of gear shaft is provided with bearings mounted annular bearing groove, it is characterized in that: the head of gear shaft is arranged with bearing housing and flat bush, on gear shaft between bearing housing and flat bush, be arranged with O type circle, described in be arranged with bearing housing, flat bush and O type circle place gear shaft the diameter of axle all equate.
2. pneumatic actuator gear shaft assembly according to claim 1, is characterized in that: the axial length of described bearing housing be not less than the exterior cylinder body being in contact with it wall thickness 2/3.
3. pneumatic actuator gear shaft assembly according to claim 1 and 2, is characterized in that: the inwall of described bearing housing is or/and be provided with the spiral chute that connects upper and lower end face on outer wall.
4. pneumatic actuator gear shaft assembly according to claim 1, it is characterized in that: the lower end of described bearing housing and the upper end of flat bush are provided with the bulge loop that outside flange forms, the bulge loop upper wall of bearing housing and the bulge loop lower wall of flat bush are connected on the exterior cylinder body at axis hole place of mounting teeth wheel shaft on lower wall.
5. pneumatic actuator gear shaft assembly according to claim 1, is characterized in that: the downside of the annular bearing groove of the afterbody of described gear shaft is provided with the circular groove of mounting O-shaped rings.
6. pneumatic actuator gear shaft assembly according to claim 4, is characterized in that: the annular boss that is provided with isolation two grooves between described annular O type ring recess and annular bearing groove.
7. pneumatic actuator gear shaft assembly according to claim 5, is characterized in that: the external diameter of described annular boss is not more than the external diameter of annular bearing groove or annular O type ring recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420034755.9U CN203743588U (en) | 2014-01-20 | 2014-01-20 | Gear shaft assembly of pneumatic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420034755.9U CN203743588U (en) | 2014-01-20 | 2014-01-20 | Gear shaft assembly of pneumatic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743588U true CN203743588U (en) | 2014-07-30 |
Family
ID=51343389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420034755.9U Expired - Fee Related CN203743588U (en) | 2014-01-20 | 2014-01-20 | Gear shaft assembly of pneumatic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203743588U (en) |
-
2014
- 2014-01-20 CN CN201420034755.9U patent/CN203743588U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20220120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |