CN203730508U - Oil drainage bolt - Google Patents
Oil drainage bolt Download PDFInfo
- Publication number
- CN203730508U CN203730508U CN201420112476.XU CN201420112476U CN203730508U CN 203730508 U CN203730508 U CN 203730508U CN 201420112476 U CN201420112476 U CN 201420112476U CN 203730508 U CN203730508 U CN 203730508U
- Authority
- CN
- China
- Prior art keywords
- oil
- hole
- oil guide
- screw
- bolt
- 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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- Mechanical Sealing (AREA)
Abstract
The utility model discloses an oil drainage bolt, and is applicable to oil drainage bolts. The technical scheme mainly includes that the oil drainage bolt comprises a bolt body, the bolt body comprises a screw and a head, an oil guide through hole is formed in the bolt body and comprises an oil guide portion and a locking portion, the locking portion is positioned at the head, the oil guide portion is positioned on the screw, locking threads and a locking bolt are arranged on the inner peripheral surface of the locking portion, the locking bolt is fittingly connected with the locking threads and comprises a locking screw and a locking bolt head, a conical surface which is coaxial with the oil guide through hole is arranged on the outer circumference of the end, which is opposite to the oil guide portion, of the locking screw, a counter-bored hole which is coaxial with the oil guide through hole is formed in the end, which is opposite to the head, of the screw, a corrugated pipe is arranged in the counter-bored hole, one end of the corrugated pipe is fixedly connected to the bottom of the counter-bored hole, a sealing ring is fixedly connected to the other end of the corrugated pipe, and the inner circumferential surface of the sealing ring is butted to the conical surface. The oil drainage bolt has the advantages of good sealing performance, reliability and long service life.
Description
Technical field
The utility model relates to a kind of bolt and manufactures field, and more particularly, it relates to a kind of oil discharge screw.
Background technique
Nowadays, bolt, as most basic connector element, by head and a screw rod class fastening piece dimerous, is widely used in every field.Oil discharge screw is as the one of fastening piece, and it is arranged on oil sump bottom, for stopping up oilhole, more when change engine oil, places waste oil container at needs below oil sump, slowly turns on oil discharge screw, and waste oil flows out from drain oil; Existing oil discharge screw need take out whole bolt in the time draining the oil from oil sump, and cannot be according to actual conditions control defuelling rate, in the process of draining the oil, waste oil easily disorderly spatters, pollute, and existing oil discharge screw is single bolt setting, after long-term use, bolt thread damages and easily causes Bolt dismantling inconvenience and fragile oilhole place screw thread.
At present, application number is that 201220519066.8 Chinese patent discloses a kind of oil discharge screw, include bolt body, described bolt body comprises screw rod and head, described screw rod outer circumferential face is provided with the binding thread for oil discharge screw being fixed on to oilhole, in described bolt body, offer the water conservancy diversion through hole axially arranging along bolt body, described refluence through hole comprises the oil outlet that is positioned at bolt body screw rod place and the plug-hole that is positioned at bolt body head, in plug-hole, be connected with auxiliary oil discharge screw, auxiliary oil discharge screw comprises screw portion and cylindrical head, on cheese head end surface, offer hexagon handle hole, described plug-hole is step hole, plug-hole comprises large aperture section and establishes female small aperture section, small aperture section is connected with oil outlet, the cylindrical head diameter adaptation of the aperture of large aperture section and auxiliary oil discharge screw.
Although this oil discharge screw can be controlled defuelling rate, mild and the oilhole of draining the oil seals reliable oil discharge screw, but, when described oil discharge screw is during for liquid level is dark, pressure is large fuel tank or oil storage equipment, due to the sealing relationship between lock bolt and bolt body can be because of for a long time, repeatedly use and be affected, there is the phenomenon of leakage of oil, not only waste resource, working life short, and leakage rate is large even affects normal operation and the use of equipment.
Model utility content
The deficiency existing for prior art, the purpose of this utility model is to provide a kind of good seal performance, reliable, and the oil discharge screw of long service life.
For achieving the above object, the utility model provides following technological scheme: a kind of oil discharge screw, comprise bolt body, bolt body comprises screw rod and head, described bolt body is provided with Oil Guide through hole, described Oil Guide through hole comprises Oil Guide portion and tight lock part, described tight lock part is positioned at head, Oil Guide portion is positioned at screw rod, the lock bolt that described tight lock part inner peripheral surface is provided with locking screw and is connected with locking screw, described lock bolt comprises locking screw and lock bolt head, the excircle of the relative Oil Guide portion of described locking screw one end is provided with the conical surface with the coaxial setting of Oil Guide through hole, one end of the relative head of described screw rod is provided with the counterbore with the coaxial setting of Oil Guide through hole, in described counterbore, be provided with bellows, one end of described bellows is fixedly connected on the bottom of counterbore, the other end of described bellows is fixedly connected with seal ring, inner peripheral surface and the conical surface of described seal ring connect.
By adopting technique scheme, on the excircle that the relative Oil Guide portion of locking screw one end is set, arrange and the conical surface of the coaxial setting of Oil Guide through hole, can utilize the tight conflict of described conical surface and seal ring to realize sealing; In the time running into oil discharge screw is dark for liquid level, pressure is large fuel tank or oil storage equipment, the oil of high pressure just can form the pressure expanding outwardly to the inner side of described bellows, now, convenient characteristic that can axial stretching with bellows, high-intensity oil pressure is changed into the active force that bellows is stretched, when bellows stretches, promoting described seal ring fits with the conical surface of locking screw more closely, realize the effect of " meeting high pressure; sealing effect is stronger ", and sealing is reliable, long service life.
The utility model is further set to: the axial length of described locking screw is greater than the axial length of described tight lock part, and the outer peripheral surface of described seal ring and the hole wall of described counterbore are inconsistent.
By adopting technique scheme, the axial length of described locking screw is greater than to the axial length of described tight lock part, can be in the time screwing described lock bolt, utilize locking screw by described seal ring, compress together with bellows, utilize the anti-pressure ability of bellows to strengthen the sealing tightness between seal ring and locking screw, thereby further improve the sealability of described oil discharge screw.
The utility model is further set to: described bellows comprises inwall and outer wall, and the hole wall of described outer wall and described counterbore is inconsistent.
By adopting technique scheme, by inconsistent the hole wall of the outer wall of described bellows and counterbore, can prevent that described bellows is in the time being subject to inner huge oil pressure or impacting, described bellows is because of tension force generation radial dilatation, not only cannot realize the effect that strengthens sealing, then also can there is elastic strain, inefficacy, lose using effect.
The utility model is further set to: described outer wall comprises some depressed parts and jut, and described each depressed part is all arranged with retainer ring, and described retainer ring is tight against depressed part.
By adopting technique scheme, retainer ring is set, can prevents that described bellows is in the process that is subject to internal pressure, depressed part is subject to the active force of the axis of screw rod dorsad, further prevent that described bellows is in the situation that being subject to internal pressure, toward radial direction generation deformation.
Brief description of the drawings
Fig. 1 is the utility model oil discharge screw embodiment's structural representation;
Fig. 2 is the A place enlarged view in Fig. 1.
Reference character: 1, screw rod; 2, head; 3, Oil Guide through hole; 31, Oil Guide portion; 32, tight lock part; 321, locking screw; 322, lock bolt; 3221, locking screw; 3222, lock bolt head; 4, counterbore; 5, bellows; 51, inwall; 52, outer wall; 53, depressed part; 54, jut; 6, seal ring; 7, conical surface; 8, retainer ring.
Embodiment
Referring to figs. 1 through Fig. 2, the utility model oil discharge screw embodiment is described further.
As shown in Figure 1 to Figure 2, a kind of oil discharge screw, comprise bolt body, bolt body comprises screw rod 1 and head 2, described bolt body is provided with Oil Guide through hole 3, described Oil Guide through hole 3 comprises Oil Guide portion 31 and tight lock part 32, described tight lock part 32 is positioned at head 2, Oil Guide portion 31 is positioned at screw rod 1, the lock bolt 322 that described tight lock part 32 inner peripheral surfaces are provided with locking screw 321 and are connected with locking screw 321, described lock bolt 322 comprises locking screw 3221 and lock bolt head 3222, the excircle of described locking screw 3221 relative Oil Guide portion 31 one end is provided with the conical surface 7 with the coaxial setting of Oil Guide through hole 3, one end of described screw rod 1 relative head 2 is provided with the counterbore 4 with the coaxial setting of Oil Guide through hole 3, in described counterbore 4, be provided with bellows 5, one end of described bellows 5 is fixedly connected on the bottom of counterbore 4, the other end of described bellows 5 is fixedly connected with seal ring 6, the inner peripheral surface of described seal ring 6 and conical surface 7 connect.
On the excircle that locking screw 3221 relative Oil Guide portion 31 one end are set, arrange and the conical surface 7 of the coaxial setting of Oil Guide through hole 3, can utilize the tight conflict of described conical surface 7 and seal ring 6 to realize sealing; In the time running into oil discharge screw is dark for liquid level, pressure is large fuel tank or oil storage equipment, the oil of high pressure just can form the pressure expanding outwardly to the inner side of described bellows 5, now, convenient characteristic that can axial stretching with bellows 5, high-intensity oil pressure is changed into the active force that bellows 5 is stretched, when bellows 5 stretches, promoting described seal ring 6 fits with the conical surface 7 of locking screw 3221 more closely, realize the effect of " meeting high pressure; sealing effect is stronger ", and sealing is reliable, long service life.
The axial length of described locking screw 3221 is greater than the axial length of described tight lock part 32, and the hole wall of the outer peripheral surface of described seal ring 6 and described counterbore 4 is inconsistent.
The axial length of described locking screw 3221 is greater than to the axial length of described tight lock part 32, can be in the time screwing described lock bolt 322, utilize locking screw 3221 by described seal ring 6, compress together with bellows 5, utilize the anti-pressure ability of bellows 5 to strengthen the sealing tightness between seal ring 6 and locking screw 3221, thereby further improve the sealability of described oil discharge screw.
Described bellows 5 comprises inwall 51 and outer wall 52, and described outer wall 52 is inconsistent with the hole wall of described counterbore 4.
The outer wall of described bellows 5 52 is inconsistent with the hole wall of counterbore 4, can prevent that described bellows 5 is in the time being subject to inner huge oil pressure or impacting, described bellows 5 is because of tension force generation radial dilatation, not only cannot realize the effect that strengthens sealing, then also can there is elastic strain, inefficacy, lose using effect.
Described outer wall 52 comprises some depressed parts 53 and jut 54, and described each depressed part 53 is all arranged with retainer ring 8, and described retainer ring 8 is tight against depressed part 53.
Retainer ring 8 is set, can prevents that described bellows 5 is in the process that is subject to internal pressure, depressed part 53 is subject to the active force of the axis of screw rod 1 dorsad, further prevents that described bellows 5 is in the situation that being subject to internal pressure, toward radial direction generation deformation.
The above makes preferred implementation of the present utility model, does not depart from for the person of ordinary skill of the art under the prerequisite of the utility model principle, can also make some modification and improvement, and these also should be considered as protection domain of the present utility model.
Claims (4)
1. an oil discharge screw, comprise bolt body, bolt body comprises screw rod and head, described bolt body is provided with Oil Guide through hole, described Oil Guide through hole comprises Oil Guide portion and tight lock part, described tight lock part is positioned at head, Oil Guide portion is positioned at screw rod, the lock bolt that described tight lock part inner peripheral surface is provided with locking screw and is connected with locking screw, described lock bolt comprises locking screw and lock bolt head, it is characterized in that: the excircle of the relative Oil Guide portion of described locking screw one end is provided with the conical surface with the coaxial setting of Oil Guide through hole, one end of the relative head of described screw rod is provided with the counterbore with the coaxial setting of Oil Guide through hole, in described counterbore, be provided with bellows, one end of described bellows is fixedly connected on the bottom of counterbore, the other end of described bellows is fixedly connected with seal ring, inner peripheral surface and the conical surface of described seal ring connect.
2. oil discharge screw according to claim 1, is characterized in that: the axial length of described locking screw is greater than the axial length of described tight lock part, and the outer peripheral surface of described seal ring and the hole wall of described counterbore are inconsistent.
3. oil discharge screw according to claim 2, is characterized in that: described bellows comprises inwall and outer wall, and the hole wall of described outer wall and described counterbore is inconsistent.
4. oil discharge screw according to claim 3, is characterized in that: described outer wall comprises some depressed parts and jut, and described each depressed part is all arranged with retainer ring, and described retainer ring is tight against depressed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112476.XU CN203730508U (en) | 2014-03-13 | 2014-03-13 | Oil drainage bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420112476.XU CN203730508U (en) | 2014-03-13 | 2014-03-13 | Oil drainage bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203730508U true CN203730508U (en) | 2014-07-23 |
Family
ID=51200586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420112476.XU Expired - Fee Related CN203730508U (en) | 2014-03-13 | 2014-03-13 | Oil drainage bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203730508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11506079B2 (en) | 2019-09-09 | 2022-11-22 | Raytheon Technologies Corporation | Fluid diffusion device for sealed bearing compartment drainback system |
| US11719127B2 (en) | 2019-10-23 | 2023-08-08 | Raytheon Technologies Corporation | Oil drainback assembly for a bearing compartment of a gas turbine engine |
| US11970972B2 (en) | 2019-10-23 | 2024-04-30 | Rtx Corporation | Windage blocker for oil routing |
-
2014
- 2014-03-13 CN CN201420112476.XU patent/CN203730508U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11506079B2 (en) | 2019-09-09 | 2022-11-22 | Raytheon Technologies Corporation | Fluid diffusion device for sealed bearing compartment drainback system |
| US11719127B2 (en) | 2019-10-23 | 2023-08-08 | Raytheon Technologies Corporation | Oil drainback assembly for a bearing compartment of a gas turbine engine |
| US11970972B2 (en) | 2019-10-23 | 2024-04-30 | Rtx Corporation | Windage blocker for oil routing |
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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: 20140723 Termination date: 20180313 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |