CN201723553U - Mechanism for preventing screw stem from being screwed out of blind hole screw sleeve - Google Patents
Mechanism for preventing screw stem from being screwed out of blind hole screw sleeve Download PDFInfo
- Publication number
- CN201723553U CN201723553U CN2010202673732U CN201020267373U CN201723553U CN 201723553 U CN201723553 U CN 201723553U CN 2010202673732 U CN2010202673732 U CN 2010202673732U CN 201020267373 U CN201020267373 U CN 201020267373U CN 201723553 U CN201723553 U CN 201723553U
- Authority
- CN
- China
- Prior art keywords
- blind hole
- screw rod
- limit pin
- swivel nut
- screw
- 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 relates to a structure for preventing a screw stem from being screwed out of a blind hole screw sleeve. The structure consists of a blind hole screw sleeve, a blind hole, a limit pin, a screw stem tail chamfer, a limit pin hole, a screw stem and a positioning mark, wherein the screw stem is arranged on the blind hole screw sleeve; the limit pin is arranged inside the limit pin hole which is formed on the screw stem tail chamfer; the positioning mark is formed on the top of the screw stem and on the same plane with the central line of the limit pin hole; the limit pin hole is vertically formed on the screw stem tail chamfer; the included angle alpha between the screw stem tail chamfer and the axis of the screw stem is 30 to 60 degrees; and the diameter phi of the blind hole is 1mm more than that D4 of a blind hole screw sleeve thread tool withdrawal groove. In the structure, the screw stem can be prevented from being screwed out through the limit pin arranged on the screw stem tail chamfer so as to prevent the screw stem from being screwed out of the blind hole screw sleeve due to the carelessness of an operator; and the screw stem can be dismounted conveniently without damaging the structure by referring to the positioning mark.
Description
Technical field
The utility model relates to the anti-structure of back-outing of a kind of blind hole swivel nut screw rod.
Background technique
The tripod jack is an important aircraft support equipment.According to the jack design code, jack should have a joint manual tune screw rod, and this adjusting screw rod is installed on the piston rod of hydraulic actuator, and the piston rod bottom is an enclosed construction, and adjusting screw rod just is contained in the blind hole like this.The adjusting screw rod design promptly will be considered functional requirement, avoids again because the operator neglects and adjusting screw rod is screwed out nut.
Traditional form is to make a swivel nut, and adjusting screw rod is contained on the swivel nut, again the swivel nut of band adjusting screw rod is pressed in the piston rod end.This form can only be avoided because the operator neglects and adjusting screw rod is screwed out nut, but has two problems, and one is to want many swivel nuts, will be pressed in pistons end to swivel nut during assembling, has increased difficulty of processing and workload; Another assembles the back adjusting screw rod exactly and can't dismantle.
Summary of the invention
The purpose of this utility model: a kind of features simple structure, the anti-structure of back-outing of blind hole swivel nut screw rod for convenience detach, that reliability is high are provided.
Technical solution of the present utility model is: the anti-structure of back-outing of a kind of blind hole swivel nut screw rod, it is by the blind hole swivel nut, blind hole, position limit pin, the terminal chamfering of screw rod, limit pin hole, screw rod, positioning mark is formed, in the blind hole of wherein said screw in the blind hole swivel nut, position limit pin is contained in the limit pin hole, limit pin hole is beaten on the terminal chamfering of screw rod, angle between terminal chamfering of described screw rod and screw axis is between 30 °～60 °, described positioning mark is done at the screw head side, and with the limit pin hole center line on same plane, blind hole diameter is bigger than blind hole swivel nut Gewindefreistiche diameter simultaneously, forms a step difference between the two.
Described blind hole diameter is than the big 1mm of blind hole swivel nut Gewindefreistiche diameter.
Angle between the axis of terminal chamfering of described screw rod and screw rod is 45 °.
Described positioning mark is straight line or circular hole.
The beneficial effects of the utility model are: the utility model blind hole swivel nut screw rod is anti-back-outs structure by the position-limiting action of position limit pin in blind hole, can avoid owing to operator's carelessness screw rod being screwed out the blind hole swivel nut.With reference to positioning mark, locating stud can be retracted in the positioning pin hole, thereby under the situation of not destroying structure, pull down screw rod simultaneously.Therefore the utility model blind hole swivel nut screw rod is prevented back-outing, and structural safety is reliable, convenient disassembly, simple in structure, has certain actual application value.
Description of drawings
Fig. 1 is the anti-structural representation of structure one better embodiment of back-outing of the utility model blind hole swivel nut screw rod,
Wherein, 1-blind hole swivel nut, 2-blind hole, 3-position limit pin, the terminal chamfering of 4-screw rod, 5-limit pin hole, 6-screw rod, 7-positioning mark.
Embodiment
The utility model is described in further detail below by embodiment:
See also Fig. 1, it is the anti-structural representation of structure one better embodiment of back-outing of the utility model blind hole swivel nut screw rod.The anti-structure of back-outing of described blind hole swivel nut screw rod comprises blind hole swivel nut 1, blind hole 2, position limit pin 3, the terminal chamfering 4 of screw rod, limit pin hole 5, screw rod 6 and positioning mark 7.Blind hole 2 openings in the described blind hole swivel nut 1 are provided with internal thread, and the diameter phi of this blind hole 2 manys 1mm than blind hole swivel nut Gewindefreistiche diameter D4 (D4 is by HB5829-1983).Described screw rod 6 is contained in the blind hole 2 in the blind hole swivel nut 1, and the axis angle α of terminal chamfering 4 of described screw rod and screw rod 6 is between 30 °～60 °, in the present embodiment, gets 45 °.Described limit pin hole 5 is vertically set on the terminal chamfering 4 of screw rod, and described position limit pin 3 is contained in the limit pin hole 5.Described positioning mark 7 is done in screw rod 6 head sides, and positioning mark 7 and limit pin hole 5 center lines and can be line on same plane, also can be small sircle holes.
When the anti-structure of back-outing of the utility model blind hole swivel nut screw rod is installed, in the limit pin hole 5 at the terminal chamfering of screw rod 4 places of earlier position limit pin 3 being packed into, again with in the blind hole 2 in the screw rod 6 precession blind hole swivel nuts 1.During use, limit pin hole 5 openings are towards little, therefore because gravity factor, position limit pin 3 one ends can skid off limit pin hole 5 and be fitted on blind hole 2 walls, because the diameter of blind hole 2 is than the big 1mm of internal thread tool withdrawal groove diameter, therefore this is attached to position limit pin on the blind pore wall and can utilizes this step difference effectively to limit the back-out of screw rod 6, and is therefore safe and reliable.When needs dismantling screw 6, rotary screw 6 is set level screw rod 6 to spacing position, make positioning mark 7 up, this moment corresponding positioning pin hole opening up, under action of gravity, position limit pin 3 slips back in the limit pin hole 5, screws out screw rod 6 again, thereby finishes the dismounting of screw rod.
The anti-structure of back-outing of the utility model blind hole swivel nut screw rod is provided with relating to of limit pin hole and position limit pin and blind hole inner diameter and internal thread tool withdrawal groove diameter step difference in the terminal chamfering of screw rod, can effectively avoid owing to operator's carelessness screw rod being screwed out the blind hole swivel nut.And by with reference to positioning mark, under the situation of not destroying structure, screw rod can be screwed out in blind hole, thereby pull down screw rod easily.Therefore the utility model blind hole swivel nut screw rod is prevented back-outing, and structural safety is reliable, convenient disassembly, simple in structure, has certain actual application value.
Claims (4)
1. a blind hole swivel nut screw rod prevents back-outing structure, it is characterized in that: by blind hole swivel nut (1), blind hole (2), position limit pin (3), the terminal chamfering (4) of screw rod, limit pin hole (5), screw rod (6), positioning mark (7) is formed, wherein said screw rod (6) is contained in the interior blind hole of blind hole swivel nut (1), position limit pin (3) is contained in the limit pin hole (5), limit pin hole (5) is beaten on the terminal chamfering of screw rod (4), angle between terminal chamfering (4) of described screw rod and screw rod (6) axis is between 30 °～60 °, described positioning mark (7) is done at screw rod (6) head side, and with limit pin hole (5) center line on same plane, blind hole (2) diameter is bigger than blind hole swivel nut Gewindefreistiche diameter simultaneously, forms a step difference between the two.
2. the anti-structure of back-outing of a kind of blind hole swivel nut screw rod according to claim 1, it is characterized in that: described blind hole (2) diameter is than the big 1mm of blind hole swivel nut (1) Gewindefreistiche diameter.
3. the anti-structure of back-outing of a kind of blind hole swivel nut screw rod according to claim 2 is characterized in that: the angle between the axis of terminal chamfering (4) of described screw rod and screw rod (6) is 45 °.
4. the anti-structure of back-outing of a kind of blind hole swivel nut screw rod according to claim 3, it is characterized in that: described positioning mark (7) is straight line or circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202673732U CN201723553U (en) | 2010-07-20 | 2010-07-20 | Mechanism for preventing screw stem from being screwed out of blind hole screw sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202673732U CN201723553U (en) | 2010-07-20 | 2010-07-20 | Mechanism for preventing screw stem from being screwed out of blind hole screw sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201723553U true CN201723553U (en) | 2011-01-26 |
Family
ID=43491876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202673732U Expired - Lifetime CN201723553U (en) | 2010-07-20 | 2010-07-20 | Mechanism for preventing screw stem from being screwed out of blind hole screw sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201723553U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405754A (en) * | 2014-12-11 | 2015-03-11 | 中国航空工业标准件制造有限责任公司 | Self locking blind hole nut |
| CN110307205A (en) * | 2019-07-15 | 2019-10-08 | 徐州永佳液压设备有限公司 | Hydraulic cylinder piston anti-loose structure |
-
2010
- 2010-07-20 CN CN2010202673732U patent/CN201723553U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104405754A (en) * | 2014-12-11 | 2015-03-11 | 中国航空工业标准件制造有限责任公司 | Self locking blind hole nut |
| CN110307205A (en) * | 2019-07-15 | 2019-10-08 | 徐州永佳液压设备有限公司 | Hydraulic cylinder piston anti-loose structure |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110126 |