CN201391327Y - Mechanical extension bar prop for hydraulic bracket - Google Patents
Mechanical extension bar prop for hydraulic bracket Download PDFInfo
- Publication number
- CN201391327Y CN201391327Y CN200920088853U CN200920088853U CN201391327Y CN 201391327 Y CN201391327 Y CN 201391327Y CN 200920088853 U CN200920088853 U CN 200920088853U CN 200920088853 U CN200920088853 U CN 200920088853U CN 201391327 Y CN201391327 Y CN 201391327Y
- Authority
- CN
- China
- Prior art keywords
- extension bar
- snap ring
- mechanical extension
- ring
- peripheral face
- 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 - Lifetime
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Abstract
The utility model discloses a mechanical extension bar prop for a hydraulic bracket. The mechanical extension bar prop comprises an open plunger driven by a hydraulic cylinder to extend and an extension bar with an adjustable groove and one end being slidingly inserted into an opening of the open plunger. A ring groove is cut on the external peripheral face of the open plunger which is linked with the extension bar through a snap ring; two bosses are arranged at intervals on the internal peripheral face of the snap ring axially and are respectively locked to the adjustable groove and the ring groove; and a fixing bushing is sleeved on the external peripheral face of the snap ring. The mechanical extension bar prop has the advantage that the ring area is the stress surface with large area and even stress distribution, which greatly increases the tensile strength. Even under the great tensile, only the weak part of the snap ring can be bent or broken without damage to the plunger cylinder mouth. The mechanical extension bar prop improves the strength of the open plunger and the reliability of the mechanical extension bar prop or a jack and solves the problem that the damage of the open plunger cylinder mouth may cause the failure of the mechanical extension bar prop or the jack.
Description
Technical field
The utility model relates to hydraulic support, especially relates to the mechanical extension bar column that is used for hydraulic support.
Background technology
Traditional mechanical extension bar is lived with opening and is formed connecting by snap ring, maintainance set, connecting axle and cottor pin etc. of post, the extension bar column of this form needs that structurally opening work post, extension bar and maintainance set design are had axis hole, and need connect extension bar with coupling spindle and are fixed in the post alive.Its structure has following deficiency: (1) column is also wanted to bear certain drag load under the mine mal-condition, original structure is by connecting link pin pulling force to be delivered on the opening post alive by extension bar, owing to be subjected to the axis hole place intensity of structural restriction connecting link pin and opening post alive limited, when being subjected to drag load, easily cause to damage accident to occur; (2) porous is coaxial, and the mounting process difference also is subjected to the restriction of axis hole direction; (3) behind the bearing pin stress deformation, the dismounting difficulty; (4) extension bar is bigger with the physical dimension that the cylinder mouth connects, and has reduced the magnification of column.
The utility model content
The utility model purpose is to provide a kind of resistance to tension strong and increase the mechanical extension bar column that is used for hydraulic support of its magnification.
For achieving the above object, the utility model can be taked following technical proposals:
The mechanical extension bar column that is used for hydraulic support described in the utility model, comprise the flexible opening of Driven by Hydraulic Cylinder post alive, slip is inserted into the extension bar that has regulating tank in the described opening post opening alive with an end, described opening post outer peripheral face alive offers annular groove, opening post alive and extension bar link by snap ring, described snap ring inner peripheral surface is arranged at intervals with two boss vertically, described two boss respectively with opening the live annular groove of post, the regulating tank clamping mutually of extension bar; Be set with fixedly maintainance set at the snap ring outer peripheral face.
Be arranged at intervals with boss and semicircle groove vertically at described snap ring outer peripheral face, in described semicircle groove, be connected with back-up ring; Described fixedly maintainance set is arranged between boss and the back-up ring.
The connection that the utility model advantage is to be used for the mechanical extension bar column of hydraulic support is set to not have the bite type design of coupling spindle, one of two boss with one group of snap ring (generally being that two semi-rings are also a plurality of) are connected in the extension bar regulating tank, one is connected in opening and lives in the annular groove of post, is sleeved on the snap ring outer peripheral face with fixing maintainance set and limits it and move radially; Be arranged at intervals with boss and semicircle groove vertically at described snap ring outer peripheral face, in described semicircle groove, be connected with back-up ring; Described fixedly maintainance set is arranged between boss and the back-up ring, limits fixedly moving axially of maintainance set with back-up ring; Be that anchor ring is long-pending stressed when being subjected to tensile stress, stressed contact area is big, stressed evenly, and tensile strength is increased substantially.Even also be weak link place bend fracture when being subjected to excessive pulling force with snap ring, can not cause the damage at post cylinder mouth alive place, thereby improved opening the live intensity of post and the reliability of mechanical extension bar column or jack, solved that opening lives that post cylinder mouth damages and the mechanical extension bar column that causes or the Problem of Failure of jack.Be convenient to dismounting and maintenance simultaneously, reduced maintenance cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
As shown in the figure, the mechanical extension bar column that is used for hydraulic support described in the utility model, comprise that hydraulic cylinder 1 drives flexible opening post 2 alive, slip is inserted into the extension bar 3 that has regulating tank in described opening post 2 openings alive with an end, described opening post 2 outer peripheral faces alive offer annular groove, opening post 2 alive links by snap ring 4 with extension bar 3, described snap ring 4 inner peripheral surfaces are arranged at intervals with two boss 5,6 vertically, described two boss 5,6 respectively with opening the live annular groove of post 2, the regulating tank clamping mutually of extension bar 3; Be set with fixedly maintainance set 7 at snap ring 4 outer peripheral faces; Be arranged at intervals with boss 8 and semicircle groove vertically at described snap ring 4 outer peripheral faces, in described semicircle groove, be connected with back-up ring 9; Described fixedly maintainance set 7 is arranged between boss 8 and the back-up ring 9.
Claims (2)
1, a kind of mechanical extension bar column that is used for hydraulic support, comprise that hydraulic cylinder (1) drives flexible opening post (2) alive, slip is inserted into the extension bar (3) that has regulating tank in described opening post (2) opening alive with an end, it is characterized in that: described opening post (2) outer peripheral face alive offers annular groove, opening post alive (2) links by snap ring (4) with extension bar (3), described snap ring (4) inner peripheral surface is arranged at intervals with two boss (5 vertically, 6), described two boss (5,6) respectively with the live annular groove of post (2) of opening, the regulating tank phase clamping of extension bar (3); Be set with fixedly maintainance set (7) at snap ring (4) outer peripheral face.
2, according to the described mechanical extension bar column that is used for hydraulic support of claim 1, it is characterized in that: be arranged at intervals with boss (8) and semicircle groove vertically at described snap ring (4) outer peripheral face, in described semicircle groove, be connected with back-up ring (9); Described fixedly maintainance set (7) is arranged between boss (8) and the back-up ring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920088853U CN201391327Y (en) | 2009-03-09 | 2009-03-09 | Mechanical extension bar prop for hydraulic bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920088853U CN201391327Y (en) | 2009-03-09 | 2009-03-09 | Mechanical extension bar prop for hydraulic bracket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201391327Y true CN201391327Y (en) | 2010-01-27 |
Family
ID=41598153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920088853U Expired - Lifetime CN201391327Y (en) | 2009-03-09 | 2009-03-09 | Mechanical extension bar prop for hydraulic bracket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201391327Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557015A (en) * | 2013-08-06 | 2014-02-05 | 四川华蓥山广能集团嘉华机械有限责任公司 | Multi-expansion hydraulic support column |
| CN104912580A (en) * | 2015-05-15 | 2015-09-16 | 四川华蓥山广能集团嘉华机械有限责任公司 | Two-stage hydraulic telescopic and one-stage mechanical telescopic hydraulic support frame upright post |
-
2009
- 2009-03-09 CN CN200920088853U patent/CN201391327Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557015A (en) * | 2013-08-06 | 2014-02-05 | 四川华蓥山广能集团嘉华机械有限责任公司 | Multi-expansion hydraulic support column |
| CN104912580A (en) * | 2015-05-15 | 2015-09-16 | 四川华蓥山广能集团嘉华机械有限责任公司 | Two-stage hydraulic telescopic and one-stage mechanical telescopic hydraulic support frame upright post |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100127 |
|
| CX01 | Expiry of patent term |