CN202200024U - Hydraulic screw rod stretcher - Google Patents
Hydraulic screw rod stretcher Download PDFInfo
- Publication number
- CN202200024U CN202200024U CN2011202965580U CN201120296558U CN202200024U CN 202200024 U CN202200024 U CN 202200024U CN 2011202965580 U CN2011202965580 U CN 2011202965580U CN 201120296558 U CN201120296558 U CN 201120296558U CN 202200024 U CN202200024 U CN 202200024U
- Authority
- CN
- China
- Prior art keywords
- overcoat
- screw mandrel
- stretcher
- cock body
- sleeve
- 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 hydraulic screw rod stretcher, which comprises a plug body, an outer case, a sleeve and a pressure oil circuit; the plug body is arranged in one end hole of the outer case; the sleeve is arranged in the other end hole of the outer case, and a nut is arranged in the sleeve; and the pressure oil circuit is connected with the plug body and the outer case. The stretcher also comprises a plurality of screw plugs and a plurality of elastic round pins; and the screw plugs are respectively arranged on the plug body and the outer case and are used for plugging the pressure oil circuit. The elastic round pins are arranged on the inner circular wall of the outer case at interval and are used for limiting the axial movement of the sleeve. The hydraulic screw rod stretcher can solve the big problem of screwing in a high-strength nut through a hydraulic stretching technology, also can overcome the defect of larger size of the hydraulic nut, can be removed after screwing in the high-strength nut, and thus can not occupy space.
Description
Technical field
The utility model relates to a kind of aid of stretch screw mandrel and fastening nut, is specifically related to a kind of hydraulic pressure screw mandrel stretcher.
Background technology
Now; The coal-winning machine of one of colliery comprehensive mechanical coal mining equipment was in order to increase the coal space; Fuselage adopts no bottom bracket structure mostly, and the high-strength bolt duplicate invoice of forming through high-strength and long screw mandrel, high strength nut and packing ring between left and right traction reduction box and the central frame three-major-items is connected into one.Because coal-winning machine is the main equipment of tens tons even up to a hundred tons, the weight of left and right traction reduction box and central frame three-major-items is also heavier, so require the diameter of their high-strength and long screw mandrel of connection bigger, and like φ 42, φ 48, φ 64 etc.So large diameter bolt duplicate invoice connects, and pretightning force is very big, and how fastening nut is a big problem.Rely on spanner, sleeve and people's strength can't tighten certainly.In the prior art, designed a kind of hydraulic nut, adopted the hydraulic locking technology, and cooperate manual super-pressure pressuring pump, the high-strength and long screw mandrel that stretches is tightened hydraulic nut then.This mode is no doubt good, but shortcoming is that the hydraulic nut volume is bigger, takes up room.
The utility model content
The utility model provides a kind of hydraulic pressure screw mandrel stretcher, and this hydraulic pressure screw mandrel stretcher is to solve this big problem of high strength nut of tightening through the hydraulic tensioning technology; Overcome the bigger shortcoming of hydraulic nut volume simultaneously, promptly dismountable after this hydraulic pressure screw mandrel stretcher is tightened high strength nut, do not take up room.
In order to achieve the above object, the utility model is realized through following technical scheme:
A kind of hydraulic pressure screw mandrel stretcher is used for the fastening nut and the screw mandrel that stretches, and is characterized in that this stretcher comprises cock body, overcoat, sleeve and pressure oil circuit;
Described cock body is arranged in overcoat one stomidium;
Described sleeve is arranged in another stomidium of overcoat;
Described nut is arranged in the sleeve;
Described pressure oil circuit connection plug body and overcoat.
Wherein, this stretcher also comprises several screw plugs; Described screw plug is separately positioned on cock body and outer putting, and is used for blocking the pressure oil circuit.
This stretcher also comprises several elastic cylindrical pins; Described elastic cylindrical pin is arranged on the inner peripheral wall place of overcoat at interval, is used for limiting moving axially of sleeve.
This stretcher also comprises seal member; Described seal member comprises successively, and the interval is arranged on guide ring, large sealing packing ring and the small sealing ring between overcoat and the cock body.
The inwall of said cock body is provided with screw thread; The screw thread of the outer surface of described screw thread and screw mandrel matches.
A kind of hydraulic pressure screw mandrel of the utility model stretcher compared with prior art has the following advantages:
A kind of hydraulic pressure screw mandrel of the utility model stretcher is connected as one through cock body and screw mandrel, and cock body drives screw mandrel and stretches by force, produces very big pretightning force.
A kind of hydraulic pressure screw mandrel of the utility model stretcher combines the pressure oil cavity of back formation that good sealing effectiveness is arranged owing to be provided with seal member to cock body and overcoat.
Description of drawings
Fig. 1 is the structural representation of a kind of hydraulic pressure screw mandrel of the utility model stretcher.
The specific embodiment
Specify a kind of preferred embodiment of the utility model below in conjunction with Fig. 1.
As shown in Figure 1, a kind of hydraulic pressure screw mandrel stretcher, this stretcher comprise cock body 1, overcoat 2, sleeve 3, pressure oil circuit 4 and two screw plugs 6; Cock body 1 is arranged in overcoat 2 one stomidiums; Sleeve 3 is arranged in another stomidium of overcoat 2; Pressure oil circuit 4 connects cock body 1 and overcoat 2.Screw plug 6 is separately positioned on cock body 1 and the overcoat 2, is used for blocking respectively the two ends of pressure oil circuit 4.The inwall of said cock body 1 is provided with screw thread, and the screw thread of the outer surface of described screw thread and screw mandrel 9 matches.
This stretcher also comprises several elastic cylindrical pins 7, seal member; Described elastic cylindrical pin 7 is arranged on the inner peripheral wall place of overcoat 2 at interval, is used for limiting moving axially of sleeve 3.Described seal member comprises and at interval is arranged on guide ring 81, large sealing packing ring 82 and the small sealing ring 83 between overcoat 2 and the cock body 1, is used for hermetically sealed case 2 and cock body 1.
Of Fig. 1, during the utility model The field, be installed in the position that will connect to high-strength and long screw mandrel 9 earlier, load onto large washer 10, with nut 5 first pretensions.
Hydraulic pressure screw mandrel stretcher is installed then, and sleeve 3 is contained in the right-hand member hole of overcoat 2, is used for limiting the axial float of said sleeve 3 with three elastic cylindrical pins 7; Pack large sealing packing ring 82, guide ring 81 on the cock body 1 into, pack small sealing ring 83 in the hole of overcoat 2 into, pack cock body 1 in the overcoat 2 into then, be screwed into two screw plugs 6 in the corresponding screw.So accomplish the installation of hydraulic pressure screw mandrel stretcher.
Formed the pressure oil cavity of a sealing after cock body 1 combines with overcoat 2, cock body 1 seals through large sealing packing ring 82, guide ring 81 with overcoat 2 left end faying faces, and cock body 1 seals through small sealing ring 83 with overcoat 2 right-hand member faying faces.
Be enclosed within the hydraulic pressure screw mandrel stretcher right-hand member that has installed on the high strength nut 5, be close to, as shown in Figure 1.
Take off the screw plug 6 of cock body 1 left end, load onto the snap joint seat, connect manual super-pressure pressuring pump; When the hydraulic oil of manual super-pressure pressuring pump generation injected the pressure oil cavity between overcoat 2 and the cock body 1, under the effect of hydraulic coupling, cock body 1 was moved to the left; Cock body 1 has been connected as one through screw thread pair with high-strength and long screw mandrel 9; Just drive high-strength and long screw mandrel 9 and be moved to the left, promptly high-strength and long screw mandrel 9 is stretched by force, produces very big pretightning force; After suppressing the oil pressure that limits, turn sleeve 3, sleeve 3 drives high-intensity nut 5 and screws, and sheds hydraulic oil then, the screw plug 6 of screwing on.At this moment high-intensity nut 5 just is locked in very big pretightning force position, i.e. the secondary operating position of bolt.Extract hydraulic pressure screw mandrel stretcher at last.
Although the content of the utility model has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to the restriction to the utility model.After those skilled in the art have read foregoing, for the multiple modification of the utility model with to substitute all will be conspicuous.Therefore, the protection domain of the utility model should be limited appended claim.
Claims (5)
1. hydraulic pressure screw mandrel stretcher is used for fastening nut (5) and the screw mandrel that stretches (9), it is characterized in that this stretcher comprises cock body (1), overcoat (2), sleeve (3) and pressure oil circuit (4);
Described cock body (1) is arranged in overcoat (2) one stomidiums;
Described sleeve (3) is arranged in another stomidium of overcoat (2);
Described nut (5) is arranged in the sleeve (3);
Described pressure oil circuit (4) connects cock body (1) and overcoat (2).
2. hydraulic pressure screw mandrel stretcher according to claim 1 is characterized in that, also comprises several screw plugs (6); Described screw plug (6) is separately positioned on cock body (1) and the overcoat (2), is used for blocking pressure oil circuit (4).
3. hydraulic pressure screw mandrel stretcher according to claim 1 is characterized in that, also comprises several elastic cylindrical pins (7); Described elastic cylindrical pin (7) is arranged on the inner peripheral wall place of overcoat (2) at interval, is used for limiting moving axially of sleeve (3).
4. hydraulic pressure screw mandrel stretcher according to claim 1 is characterized in that, also comprises seal member; Described seal member comprises successively, and the interval is arranged on guide ring (81), large sealing packing ring (82) and the small sealing ring (83) between overcoat (2) and the cock body (1).
5. hydraulic pressure screw mandrel stretcher according to claim 1 is characterized in that the inwall of said cock body (1) is provided with screw thread; The screw thread of the outer surface of described screw thread and screw mandrel (9) matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202965580U CN202200024U (en) | 2011-08-16 | 2011-08-16 | Hydraulic screw rod stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202965580U CN202200024U (en) | 2011-08-16 | 2011-08-16 | Hydraulic screw rod stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202200024U true CN202200024U (en) | 2012-04-25 |
Family
ID=45964162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202965580U Expired - Lifetime CN202200024U (en) | 2011-08-16 | 2011-08-16 | Hydraulic screw rod stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202200024U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307237A (en) * | 2019-07-26 | 2019-10-08 | 周超 | A kind of hydraulic nut |
-
2011
- 2011-08-16 CN CN2011202965580U patent/CN202200024U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110307237A (en) * | 2019-07-26 | 2019-10-08 | 周超 | A kind of hydraulic nut |
| CN110307237B (en) * | 2019-07-26 | 2021-03-26 | 浙江捷能汽车零部件有限公司 | Hydraulic nut |
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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: 20120425 |
|
| CX01 | Expiry of patent term |