CN2195648Y - Hydraulic screw bolt - Google Patents
Hydraulic screw bolt Download PDFInfo
- Publication number
- CN2195648Y CN2195648Y CN 94213274 CN94213274U CN2195648Y CN 2195648 Y CN2195648 Y CN 2195648Y CN 94213274 CN94213274 CN 94213274 CN 94213274 U CN94213274 U CN 94213274U CN 2195648 Y CN2195648 Y CN 2195648Y
- Authority
- CN
- China
- Prior art keywords
- hole
- hydraulic
- bolt
- circular groove
- ring
- 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
Links
- 239000004677 Nylon Substances 0.000 claims abstract description 6
- 229920001778 nylon Polymers 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000001050 lubricating effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Details Of Valves (AREA)
Abstract
The utility model relates to a hydraulic screw bolt fastened by a hydraulic device in advance, which is arranged in an extension body at the tail end of a screw bolt body, the diameter of which is larger than the rod body. The hydraulic device comprises annular grooves, a check valve, an oil discharging valve, seal rings in the annular grooves, nylon stop rings, pressure rings, etc. Because of the advance fastening of screw bolts by the hydraulic device on the body of the screw bolt, the utility model has the characteristics of convenient assembly and disassembly, small occupation, and controlled advance fastening force.
Description
The utility model relates to a kind of hydraulic bolt by means of the hydraulic pressure installation pretension, and it is applicable to the connection of mechanical component.
At present, be used for the pretension of the high-strength bolt of mechanical component connection, normally realize, for example: torque spanner, hydraulic pressure spanner, hydraulic bolt tensioning jack etc. with some instrument.Owing to will use pre-clamping tool, so assembling-disassembling bolt will take certain spatial position, and dismounting is very inconvenient; In addition, use pre-clamping tool to come pretension bolt, its pretightening force is difficult to control.
The purpose of this utility model is to want to provide a kind of body to be provided with the hydraulic bolt of hydraulic pressure installation, and it can self pretension and do not have and use instrument, and therefore, spatial position shared during dismounting is very little, dismounting is very convenient, and can accomplish pretightening force control to it.
The purpose of this utility model is to realize like this.A kind of hydraulic bolt, in the outer body of body of bolt tail diameter, a hydraulic pressure installation is set greater than shaft, this hydraulic pressure installation comprises circular groove, be in the seal ring of upside of the ring groove, be in the circular groove below pressure ring, be in the nylon ring washer between seal ring and the pressure ring.Two vertical with circular groove and communicate holes are set on tail end face, vertical and communicate a draining hole in two holes therewith is set on the afterbody sidewall.In a hole that communicates with the draining hole oil drain valve is set, in another hole one-way valve is set, the one-way valve here is lubricating cup, oil drain valve by screw with steel ball and draining hole, be in the hole (being oil inlet hole) that communicates with draining on the tail end face and constitute.When will be to this hydraulic bolt pretension, close oil drain valve earlier, promptly screw screw and make steel ball block the oil inlet hole of oil drain valve; Inject high pressure oil through one-way valve to circular groove, the oil pressure of the high pressure oil of annotating should be decided according to the pretightening force of setting, and pretightening force is directly proportional with oil pressure.After injecting high pressure oil to circular groove, oil pressure applies a pressure through pressure ring to connected piece, also is that hydraulic bolt applies a tightening force to connected piece, and hydraulic bolt is by pretension.In the time will dismantling this hydraulic bolt, only need open oil drain valve, promptly unclamp screw, steel ball leaves oil inlet hole, and the high pressure oil in the circular groove just can release from the draining hole through oil inlet hole, and oil pressure promptly reduces to zero, and added pretightening force is removed on the hydraulic bolt.
We can be decided to be seal ring the U-shaped seal ring.We also can be arranged on two holes of tail end face on the same radial plane.
Aforesaid hydraulic bolt, its hydraulic pressure installation comprise two covers or the above mechanism of two covers, and every cover mechanism all includes two holes, draining hole, one-way valve, the oil drain valve on seal ring, nylon ring washer, pressure ring and the tail end face.Each two hole overlapping on the tail end face in the mechanism is on the position of the different radial dimensions in same radial plane, and their draining hole communicates, and doing like this is in order to apply bigger pretightening force to hydraulic bolt.
The utility model is owing to adopt the structure that hydraulic pressure installation is set at bolt body, it can apply a pressure to connected piece by hydraulic pressure installation, be that hydraulic bolt applies a tightening force to connected piece, thereby reached the purpose of pretension bolt, and can preestablish the pretightening force of bolt, pretightening force is directly proportional with the oil pressure of hydraulic pressure installation; When needs are dismantled, open oil drain valve, the high pressure oil of releasing can be removed the pretension to bolt.So, the pre-clamping tool of more existing bolt, it has easy accessibility, the characteristics that the position that takes up room is little, pretightening force can be controlled.
Accompanying drawing is the structural representation of the hydraulic bolt that the utility model proposes.
Introduce an embodiment of the present utility model below in conjunction with accompanying drawing.Be a hydraulic bolt as shown in drawings, in the outer body of body of bolt afterbody (1a) diameter, be provided with a hydraulic pressure installation greater than shaft (1b), this hydraulic pressure installation comprises circular groove (1c), be in and the hole (1d) that communicate vertical with circular groove (1c) and hole (1e) on afterbody (1a) end face, be in and the draining hole (1f) that communicate vertical with hole (1e) on afterbody (1a) sidewall, hole (1d) is on the same radial plane with hole (1e), and circular groove (1c), hole (1d), hole (1e) constitute oil circuit with draining hole (1f); Be provided with seal ring (2) in the top of circular groove (1c), sealing circle (2) can be the U-shaped seal ring, is provided with pressure ring (4) in circular groove (1c) below, between seal ring (2) and pressure ring (4) nylon back-up ring (3) is set; One-way valve (5) (being lubricating cup) is set in hole (1d); Oil drain valve (6) is set in hole (1e), and this oil drain valve (6) is by screw (6a), steel ball (6a) and hole (1e) and draining hole (1f) formation.During use, earlier hydraulic bolt is screwed, inject high pressure oil through one-way valve (5) to circular groove (1c) then, the oil pressure of the high pressure oil of annotating should be decided according to the pretightening force of setting.At this moment, oil pressure produces a pressure through pressure ring (4) to connected piece, also is that hydraulic bolt produces a tightening force to connected piece, and hydraulic bolt is by pretension.In the time will dismantling hydraulic bolt, need open oil drain valve (6), promptly unclamp screw (6a), high pressure oil in the circular groove just can release from draining hole (1f), oil pressure promptly reduces to zero, and added pre-spiral shell is removed on the hydraulic bolt, and hydraulic bolt will be easy to be removed.
In order to apply bigger pretightening force to hydraulic bolt, we can go up body of bolt afterbody (1a) hydraulic pressure installation and be designed to and include two covers or mechanism as shown in drawings more than two covers.
Claims (4)
1, a kind of hydraulic bolt, comprise the body of bolt (1), it is characterized in that: in the outer body of body of bolt afterbody (1a) diameter, be provided with a hydraulic pressure installation greater than shaft (1b), this hydraulic pressure installation comprises circular groove (1c), be in the seal ring (2) of circular groove (1c) top, be in the pressure ring (4) of circular groove (1c) below, be in the nylon ring washer (3) between seal ring (2) and the pressure ring (4), two vertical with circular groove (1c) and communicate holes (1d) are arranged on afterbody (1a) end face, (1e), vertical with hole (1e) and communicate a draining hole (1f) is arranged on afterbody (1a) sidewall, one-way valve (5), oil drain valve (6) places hole (1d) respectively, in the hole (1e), described one-way valve (5) is a lubricating cup, and described oil drain valve is by screw (6a), steel ball (6b) and hole (1e) constitute with draining hole (1f).
2, hydraulic bolt according to claim 1 is characterized in that: described seal ring (2) is the U-groove bevel seal.
3, hydraulic bolt according to claim 1 and 2 is characterized in that: hole (1d) is on the same radial plane with hole (1e).
4, hydraulic bolt according to claim 3, it is characterized in that: hydraulic pressure installation comprises two covers or the above mechanism of two covers, and every cover mechanism (1) all includes: circular groove (1c), seal ring (2), nylon ring washer (3), pressure ring (4) and hole (1d), hole (1e), draining hole (1f), place the one-way valve (5) of hole (1d) to place the oil drain valve (6) of hole (1e); And two or more holes (1d), hole (1e) be on the same radial plane, and two or more drainings hole (1f) communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94213274 CN2195648Y (en) | 1994-06-06 | 1994-06-06 | Hydraulic screw bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94213274 CN2195648Y (en) | 1994-06-06 | 1994-06-06 | Hydraulic screw bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2195648Y true CN2195648Y (en) | 1995-04-26 |
Family
ID=33829881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94213274 Expired - Fee Related CN2195648Y (en) | 1994-06-06 | 1994-06-06 | Hydraulic screw bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2195648Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373443A (en) * | 2014-10-27 | 2015-02-25 | 苏州市吴中区光福金凤五金厂 | Self-lubricating bolt |
-
1994
- 1994-06-06 CN CN 94213274 patent/CN2195648Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373443A (en) * | 2014-10-27 | 2015-02-25 | 苏州市吴中区光福金凤五金厂 | Self-lubricating bolt |
| CN104373443B (en) * | 2014-10-27 | 2016-08-24 | 苏州中拓专利运营管理有限公司 | A kind of self-lubricating bolt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |