CN202056289U - Off-course variable-pitch gear case and quick-change connector thereof - Google Patents
Off-course variable-pitch gear case and quick-change connector thereof Download PDFInfo
- Publication number
- CN202056289U CN202056289U CN2011201423626U CN201120142362U CN202056289U CN 202056289 U CN202056289 U CN 202056289U CN 2011201423626 U CN2011201423626 U CN 2011201423626U CN 201120142362 U CN201120142362 U CN 201120142362U CN 202056289 U CN202056289 U CN 202056289U
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- China
- Prior art keywords
- joint
- quick release
- release coupling
- connector
- pod apertures
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The utility model discloses a quick-change connector, which comprises a primary connector and a secondary connector, wherein the primary connector is a normally stopped connector conducted under the action of a valve core (12) of the primary connector when the valve core (12) moves axially; the secondary connector can be inserted into the primary connector and is used for pushing the valve core (12) to move in the axial direction; and one end of the secondary connector is provided with a first connecting part connected with a pipeline. The quick-change connector is installed at a time without disassembly. The secondary connector is connected with an oil filling/discharging pipe; when in use, the secondary connector is inserted into the primary connector on an off-course variable-pitch gear case, thus, oil can be conveniently and rapidly filled or discharged. The primary connector is in a unidirectional reverse stop mode, so that the primary connector cannot be conducted under the action of oil pressure in the gear case but can be conducted under external pressure, thus, not only can the gear case be ensured to be oiltight, but also oil filling can be ensured to be convenient. The utility model also discloses the off-course variable-pitch gear case with the quick-change connector.
Description
Technical field
The utility model relates to driftage variable propeller gearbox technical field, particularly a kind of driftage variable propeller gearbox and quick release coupling thereof.
Background technique
Along with the continuous fast development of domestic wind-powered electricity generation industry, the demand of driftage variable propeller gearbox is also increasing.Simultaneously along with the improving constantly and the further developing in market of company's production capacity, the quantum of output of company's driftage variable propeller gearbox also improves constantly.But, owing to driftage employed particular surroundings of variable propeller gearbox and usage requirement, manifested the problems of traditional fuel outlet plug screw of its use, mainly show following several aspect:
If a plug screw installation pretightening force is too small, seepage will take place; If pretightening force is excessive, can cause the dismounting difficulty again.
Two, refuel at every turn or drain the oil and all want plug screw of dismounting, it is very inconvenient to operate.
Three, non-leakage in order to guarantee, system regular meeting twists plug screw tighter, and through repeated disassembled and assembled, screw thread and plug screw head all can damage, and can not guarantee that sealing influences the product appearance quality again.
Four, use traditional plug screw to add, when draining the oil, after turning on plug screw and load onto moment before the plug screw, all can have oil to emerge and to reclaim, very waste.
How need not to turn under the prerequisite of plug screw, also can satisfy and add, drain the oil, is those skilled in the art's problem demanding prompt solutions.
The model utility content
In view of this, the utility model provides a kind of driftage variable propeller gearbox and quick release coupling thereof, need not to turn under the prerequisite of plug screw, also can satisfy the technical requirements that adds, drains the oil, avoid defective in the moment leakage of oil of turning on plug screw, and the repeated disassembled and assembled plug screw, the infringement that causes to plug screw.
For achieving the above object, the utility model provides following technological scheme:
A kind of quick release coupling comprises:
Female joint, it is the normal joint that ends of conducting under the axially movable effect of its spool;
Can be plugged in the described female joint, and promote the axially movable sub-joint of described spool, and the one end has first joint that is connected with pipeline.
Preferably, in above-mentioned quick release coupling, described spool has the first half chambeies that are spaced from each other and communicate with described sub-joint and driftage variable propeller gearbox respectively and the second half chambeies, have first pod apertures and second pod apertures that radially runs through respectively on described the first half chambeies and the second half chambeies, and under normal conditions, described first pod apertures and described second pod apertures are ended.
Preferably, in above-mentioned quick release coupling, described female joint comprises:
Joint body, it has the through hole that axially runs through, and the one end has and second joint that is connected of driftage variable propeller gearbox, and the other end has the 3rd joint that is connected with described sub-joint;
Elastic component, it is arranged in the described through hole, and is positioned at an end of second joint of described joint body;
Be arranged in the described through hole, and the described spool that links to each other with described elastic component, described elastic component is under free state, and the sidewall of described first pod apertures and described through hole seals.
Preferably, in above-mentioned quick release coupling, also comprise being arranged in the described through hole, and be positioned at described the 3rd joint an end by counterpart, one end of described spool is inserted in this in the counterpart, and described first pod apertures can be tightly connected in axial sliding with the described counterpart that ends.
Preferably, in above-mentioned quick release coupling, the first half chambeies of described spool and the second half chambeies are by ending by sheet, and described outer wall by sheet is tightly connected with the described counterpart that ends.
Preferably, in above-mentioned quick release coupling, the sphere of described outer surface by sheet for enlarging gradually to the external diameter of the other end near a described end by counterpart describedly by counterpart near described internal surface by sheet one end is and described sphere suitable cone.
Preferably, in above-mentioned quick release coupling, described the 3rd joint is a threaded joints;
Also comprise the dustproof nut that can be connected with this threaded joints.
Preferably, in above-mentioned quick release coupling, described sub-joint is fixed on described the 3rd joint by hold-doun nut, the 3rd joint is a threaded joints, described sub-joint is provided with the step with described hold-doun nut one end axially locating, and the other end of described hold-doun nut has the internal thread that cooperates with described the 3rd joint.
Preferably, in above-mentioned quick release coupling, described elastic component is a spring.
A kind of driftage variable propeller gearbox, comprise driftage variable propeller gearbox body and be arranged on notes jettison gear on the notes fuel outlet of this driftage variable propeller gearbox body, this is annotated jettison gear and is as above each described quick release coupling, and described female joint is arranged on the described notes fuel outlet.
From above-mentioned technological scheme as can be seen, the quick release coupling that the utility model provides comprises female joint and the sub-joint that primary and secondary cooperates, wherein, female joint is the normal joint that ends of conducting under the axially movable effect of its spool, be that it is in cut-off state under normal conditions, therefore this female joint is arranged on the driftage variable propeller gearbox and substitutes plug screw, can have the effect that prevents leakage of oil with original plug screw equally.When sub-joint is plugged in the female joint, can promote spool moves axially, so that female joint is on state, thereby can realize driftage variable propeller gearbox and extraneous being communicated with by the inserting of sub-joint and female joint, thereby can realize oil is added in the driftage variable propeller gearbox, the oil in the variable propeller gearbox of maybe will going off course is derived the outer purpose of case.
Female joint is installed on the driftage variable propeller gearbox, and once mounting need not dismounting.Sub-joint with add drain line and link to each other, during use, be inserted in the female joint that is installed on the driftage variable propeller gearbox, can realize refueling or draining the oil, convenient and swift.Female joint is unidirectional check form, can not connect under the oil pressure effect in gear-box, and externally can connect under the pressure, can guarantee that like this gear-box is oil-proof, can guarantee easy to lubricate again.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the female joint that Fig. 1 the utility model embodiment provides;
The structural representation of the quick release coupling that Fig. 2 provides for the utility model embodiment.
Embodiment
Model utility discloses a kind of driftage variable propeller gearbox and quick release coupling thereof, with need not to turn under the prerequisite of plug screw, also can satisfy the technical requirements that adds, drains the oil, avoid defective in the moment leakage of oil of turning on plug screw, and the repeated disassembled and assembled plug screw, the infringement that causes to plug screw.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technological scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiments.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
See also Fig. 1 and Fig. 2, the structural representation of the quick release coupling that the structural representation of the female joint that Fig. 1 the utility model embodiment provides, Fig. 2 provide for the utility model embodiment.
The quick release coupling that the utility model provides comprises female joint and sub-joint 15.Wherein, female joint is used to be engaged in the notes fuel outlet of driftage variable propeller gearbox, and the oil in the variable propeller gearbox that is used to prevent to go off course leaks outside.Female joint is the normal joint that ends of conducting under its spool 12 axially movable effects, and promptly under normal conditions, it is in cut-off state.Sub-joint 15 is used for cooperating with female joint, it can be plugged in the female joint, promptly in the needs oiling or when draining the oil, it can be plugged in female joint, when being plugged in it in female joint, its insertion end can promote spool 12 and move axially, thereby can go out movable valve plug 12, with with the female joint conducting, thereby make the passage conducting of female joint and sub-joint 15, so that the oil of outside is imported or the oil of inside is derived.One end of sub-joint 15 has first joint that is connected with pipeline, and pipeline links to each other with oil-filling device, by the passage that is switched in this pipeline and sub-joint 15 and the female joint oil in the oil-filling device is imported in the driftage variable propeller gearbox.
Spool 12 has the first half chambeies that are spaced from each other and communicate with sub-joint 15 and driftage variable propeller gearbox respectively and the second half chambeies, the first half chambeies can axially offering along spool 12, and it communicates with sub-joint 15, the second half chambeies can axially offering along spool 12, and it communicates with the driftage variable propeller gearbox, and the first half chambeies of spool 12 and the second half chambeies separate, and the first half chambeies and the second half chambeies can be offered at the two ends of spool 12 respectively, and the two is not communicated with, to realize separating of the two.
Have first pod apertures 121 and second pod apertures 122 that radially runs through respectively on first half chambeies and the second half chambeies, and under normal conditions, first pod apertures 121 and second pod apertures 122 are ended.First pod apertures 121 is offered along the sidewall in the first half chambeies, and communicates with the first half chambeies; Second pod apertures 122 is offered along the sidewall in the second half chambeies, and communicates with the second half chambeies.Move this spool 12 by axis, can with first pod apertures 121 and second pod apertures 122 respectively with the inner chamber conducting of female joint, again since first pod apertures 121 and second pod apertures 122 communicate with the first half chambeies and the second half chambeies respectively, therefore can be with the first half chambeies and the second half chamber conductings, and first cavity communicates with sub-joint 15, second cavity communicates with the driftage variable propeller gearbox, so can realize the conducting of sub-joint and driftage variable propeller gearbox, and with the operation of finishing oiling and draining the oil.Under any state, first pod apertures 121 and the 122 equal conductings of second pod apertures, therefore the utility model restriction under normal conditions, first pod apertures 121 and second pod apertures 122 are in cut-off state, this state can be realized easily, for example can contact with first pod apertures 121 or 122 sealings of second pod apertures by the inwall of female joint, having closed wherein a certain pod apertures is practicable ending by two pod apertures.Move this spool and the inwall of first pod apertures 121 or second pod apertures 122 and female joint can be broken away from again, promptly keep first pod apertures 121 or second pod apertures 122 all to be positioned at the cavity of female joint.
Female joint can comprise joint body 11, elastic component 13 and spool 12.Wherein, joint body 11 has the through hole that axially runs through, and the one end has second joint that is connected with the driftage variable propeller gearbox, the other end has the 3rd joint that is connected with sub-joint 15, can easily female joint be realized assembling with driftage variable propeller gearbox and sub-joint 15 respectively by second joint and the 3rd joint.Elastic component 13 is arranged in the through hole of joint body 11, and is positioned at an end of second joint of joint body 11, and this elastic component 13 is used to keep first plate chamber of spool 12 and the second half chambeies to be in cut-off state.Spool 12 is arranged in the through hole of joint body 11, and links to each other with elastic component 13, and elastic component 13 is under free state, and first pod apertures 121 seals with the sidewall of through hole.Promptly first pod apertures 121 is under the effect of the elastic force of elastic component 13, the end of spool 12 to the 3rd joint of joint body 11 pushed, cause first pod apertures 121 to contact with the inner wall sealing of joint body 11, avoiding first pod apertures 121 to be connected, thereby disconnect first cavity and second cavity with the through hole of joint body 11.
Along an end of the 3rd joint of joint body 11 when the other end pushes spool 12, spool 12 compression elastic pieces 13, after moving to a segment distance, first pod apertures 121 communicates with through hole on the joint body 11, and second pod apertures, 122 through holes same and on the joint body 11 communicate, by first pod apertures 121, the connected state of the through hole on second pod apertures 122 and the joint body 11, cause the first half chambeies and the second half chambeies to be communicated with, thereby make the cavity of sub-joint 15 and the cavity of female joint communicate, the rapid pipe joint that can form by sub-joint 15 and female joint is injected oil derivation in the variable propeller gearbox of maybe will go off course in the driftage variable propeller gearbox with the oil of outside so.
In order to realize under normal conditions, can guarantee that the through-hole wall sealing on first pod apertures 121 and the joint body 11 contacts, and the pod apertures 121 of winning is communicated with the through hole of joint body 11, therefore in the through hole of joint body 11, need to be provided with the step that contacts with 121 sealings of first pod apertures, this step can be set to integral structure with joint body 11, promptly the through hole of the mode joint body 11 by machining is set to step hole, and a device that contacts with 121 sealings of first pod apertures also can be set at the through hole of joint body 11.
Based on above-mentioned thought, the utility model also can comprise and being arranged in the through hole, and be positioned at the 3rd joint an end by counterpart 17, an end of spool 12 is inserted in should be in counterpart 17, and first pod apertures 121 with end counterpart 17 and can be tightly connected in axial sliding.By counterpart 17 is annular, the center has the center hole that cooperates with spool 12, after an end of spool 12 stretched in the center hole of counterpart 17, first pod apertures 121 was tightly connected with center bore inner wall by counterpart 17, communicated with the second half chambeies to prevent the first half chambeies.Sub-joint 15 inserts behind the center hole of counterpart 17, keeps sealing by being arranged on the seal ring 18 on the sub-joint 15 and ending counterpart 17.
The first half chambeies of spool 12 and the second half chambeies are by ending by sheet 123, by the outer wall of sheet 123 with being tightly connected by counterpart 17.The first half chambeies can axially offering along end face along spool 12 to the inside, and it communicates with sub-joint 15, the second half chambeies can axially offering along end face along spool 12 to the inside, and it communicates with the driftage variable propeller gearbox, the first half chambeies and the second half chambeies do not connect, promptly by the first half chambeies of spool 12 and the second half chambeies being separated by sheet 123 of entity, the first half chambeies and the second half chambeies can be offered at the two ends of spool 12 respectively.
By the outer surface of sheet 123 near by an end of counterpart 17 to the sphere that the external diameter of the other end enlarges gradually, by counterpart 17 be and the sphere suitable cone near internal surfaces by sheet 123 1 ends.Because by sheet 123 and the endoporus sphere and the cone match of ending counterpart 17, therefore can prevent under the effect of the elastic force of elastic component 13, spool 12 is released by counterpart 17, also can avoid under the effect of the inner big oil pressure of driftage variable propeller gearbox, just spool 12 is released by counterpart 17.
Second joint and the 3rd joint at joint body 11 two ends can be threaded joints, and for the wind sand environment that adapts to wind field is put, the utility model also can comprise the dustproof nut 14 that can be connected with this threaded joints.Promptly when need not to refuel or draining the oil, it is continuous that nut 14 is engaged in the 3rd joint that joint body 11 is connected with sub-joint 15, to be applicable to the wind sand environment of wind field.
When needs refuel or drain the oil, can be fixed to sub-joint 15 on the 3rd joint of joint body 11 by hold-doun nut 16, the 3rd joint is a threaded joints, sub-joint 15 is provided with the step with hold-doun nut 16 1 end axially locating, the other end of hold-doun nut 16 has the internal thread that cooperates with the 3rd joint, and elastic component 13 can be preferably spring.By the screw-in of hold-doun nut 16 along the 3rd joint, hold-doun nut 16 moves to the second joint direction by the step promotor site joint 15 on the sub-joint 15, and elastic component 13 is gradually reduced, and is on state until female joint.
In sum, the quick release coupling that the utility model provides comprises female joint and the sub-joint 15 that primary and secondary cooperates, wherein, female joint is the normal joint that ends of conducting under its spool 12 axially movable effects, be that it is in cut-off state under normal conditions, therefore this female joint is arranged on the driftage variable propeller gearbox and substitutes plug screw, can have the effect that prevents leakage of oil with original plug screw equally.When sub-joint 15 is plugged in the female joint, can promote spool 12 moves axially, so that female joint is on state, thereby can realize driftage variable propeller gearbox and extraneous being communicated with by the inserting of sub-joint 15 and female joint, thereby can realize oil is added in the driftage variable propeller gearbox, the oil in the variable propeller gearbox of maybe will going off course is derived the outer purpose of case.
Female joint is installed on the driftage variable propeller gearbox, and once mounting need not dismounting.Sub-joint 15 with add drain line and link to each other, during use, be inserted in the female joint that is installed on the driftage variable propeller gearbox, can realize refueling or draining the oil, convenient and swift.Female joint is unidirectional check form, can not connect under the oil pressure effect in gear-box, and externally can connect under the pressure, can guarantee that like this gear-box is oil-proof, can guarantee easy to lubricate again.
The driftage variable propeller gearbox that the utility model provides, comprise driftage variable propeller gearbox body and be arranged on notes jettison gear on the notes fuel outlet of this driftage variable propeller gearbox body, wherein, this is annotated jettison gear and is the as above described quick release coupling of embodiment, female joint is arranged on annotates on the fuel outlet, when the needs notes are drained the oil, just sub-joint 15 is plugged in the female joint.
The driftage variable propeller gearbox that the utility model provides is by being provided with the as above described quick release coupling of embodiment, both made the assembling of driftage variable propeller gearbox dispatching from the factory before, add when testing and drain the oil more convenient to operately, allow the user easy and simple to handle laborsaving in the working service process again.Not only guaranteed quality of product, also reduced working strength of workers, improved working efficiency, also reduced the product maintenance cost simultaneously, the each side benefit is obvious.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and other embodiments' difference that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the utility model.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from spirit or scope of the present utility model in other embodiments.Therefore, the utility model will can not be restricted to these embodiments shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. a quick release coupling is characterized in that, comprising:
Female joint, it is the normal joint that ends of conducting under the axially movable effect of its spool (12);
Can be plugged in the described female joint, and promote the axially movable sub-joint of described spool (12) (15), and the one end has first joint that is connected with pipeline.
2. quick release coupling as claimed in claim 1, it is characterized in that, described spool (12) has the first half chambeies that are spaced from each other and communicate with described sub-joint (15) and driftage variable propeller gearbox respectively and the second half chambeies, have first pod apertures (121) and second pod apertures (122) that radially runs through respectively on described the first half chambeies and the second half chambeies, and under normal conditions, described first pod apertures (121) and described second pod apertures (122) are ended.
3. quick release coupling as claimed in claim 2 is characterized in that, described female joint comprises:
Joint body (11), it has the through hole that axially runs through, and the one end has and second joint that is connected of driftage variable propeller gearbox, and the other end has the 3rd joint that is connected with described sub-joint (15);
Elastic component (13), it is arranged in the described through hole, and is positioned at an end of second joint of described joint body (11);
Be arranged in the described through hole, and the described spool (12) that links to each other with described elastic component (13), described elastic component (13) is under free state, and described first pod apertures (121) seals with the sidewall of described through hole.
4. quick release coupling as claimed in claim 3, it is characterized in that, also comprise and being arranged in the described through hole, and be positioned at described the 3rd joint an end by counterpart (17), one end of described spool (12) is inserted in this in counterpart (17), and described first pod apertures (121) can be tightly connected by counterpart (17) in axial sliding with described.
5. quick release coupling as claimed in claim 4 is characterized in that, the first half chambeies of described spool (12) and the second half chambeies are by ending by sheet (123), and described outer wall by sheet (123) is tightly connected with the described counterpart (17) that ends.
6. quick release coupling as claimed in claim 5, it is characterized in that, the sphere of described outer surface by sheet (123) for enlarging gradually to the external diameter of the other end near a described end by counterpart (17) describedly by counterpart (17) near described internal surface by sheet (123) one ends is and described sphere suitable cone.
7. as each described quick release coupling of claim 3-6, it is characterized in that described the 3rd joint is a threaded joints;
Also comprise the dustproof nut (14) that can be connected with this threaded joints.
8. as each described quick release coupling of claim 3-6, it is characterized in that, described sub-joint (15) is fixed on described the 3rd joint by hold-doun nut (16), the 3rd joint is a threaded joints, described sub-joint (15) is provided with the step with described hold-doun nut (16) one end axially locating, and the other end of described hold-doun nut (16) has the internal thread that cooperates with described the 3rd joint.
9. as each described quick release coupling of claim 3-6, it is characterized in that described elastic component (13) is a spring.
One kind the driftage variable propeller gearbox, comprise driftage variable propeller gearbox body and be arranged on notes jettison gear on the notes fuel outlet of this driftage variable propeller gearbox body, it is characterized in that, this annotates jettison gear is that described female joint is arranged on the described notes fuel outlet as each described quick release coupling of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201423626U CN202056289U (en) | 2011-05-06 | 2011-05-06 | Off-course variable-pitch gear case and quick-change connector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201423626U CN202056289U (en) | 2011-05-06 | 2011-05-06 | Off-course variable-pitch gear case and quick-change connector thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202056289U true CN202056289U (en) | 2011-11-30 |
Family
ID=45016260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201423626U Expired - Lifetime CN202056289U (en) | 2011-05-06 | 2011-05-06 | Off-course variable-pitch gear case and quick-change connector thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202056289U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230529A (en) * | 2011-05-06 | 2011-11-02 | 重庆齿轮箱有限责任公司 | Yawing variable pitch gearbox and quick-change connector thereof |
| CN107654784A (en) * | 2017-10-25 | 2018-02-02 | 江苏柳工机械有限公司 | A kind of built-up joint |
-
2011
- 2011-05-06 CN CN2011201423626U patent/CN202056289U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230529A (en) * | 2011-05-06 | 2011-11-02 | 重庆齿轮箱有限责任公司 | Yawing variable pitch gearbox and quick-change connector thereof |
| CN107654784A (en) * | 2017-10-25 | 2018-02-02 | 江苏柳工机械有限公司 | A kind of built-up joint |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20111130 |