CN102042450B - Centre revolving joint for engineering machinery - Google Patents
Centre revolving joint for engineering machinery Download PDFInfo
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- CN102042450B CN102042450B CN2010105797375A CN201010579737A CN102042450B CN 102042450 B CN102042450 B CN 102042450B CN 2010105797375 A CN2010105797375 A CN 2010105797375A CN 201010579737 A CN201010579737 A CN 201010579737A CN 102042450 B CN102042450 B CN 102042450B
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- rotation
- solid
- baffle plate
- fixed body
- revolving joint
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L27/00—Adjustable joints, Joints allowing movement
- F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
- F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
- F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
- F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
- F16L27/0816—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings having radial sealing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C27/00—Fire-fighting land vehicles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Joints Allowing Movement (AREA)
Abstract
The invention provides a centre revolving joint for engineering machinery. The centre revolving joint comprises a fixing body (1), a first revolving body (2), a second revolving body (3) and an annular baffle (4), wherein a first channel (5) is formed in the fixing body (1); a second channel (6) is formed in the second revolving body (3); the lower end of the second revolving body (3) is inserted into the first channel (5) to make the second channel (6) communicated with the first channel (5); a first sealing piece (7) is arranged between the fixing body (1) and the second revolving body (3); the first revolving body (2) is arranged around the fixing body (1); the upper end of the fixing body (1) extends to the baffle (4); and the second revolving body (3) and the baffle (4) are components which are mutually separated. By the centre revolving joint, the leakage of the first sealing piece (7) can be easily found, so that the first sealing piece (7) can be replaced in time.
Description
Technical field
The present invention relates to engineering machinery field, be specifically related to a kind of centre revolving joint that is used for engineering machinery.
Background technique
A lot of engineering machinery (like fire-fighting truck, pump truck or hoist) all has the dress of going up and chassis.When work, the chassis is motionless, needs 360 degree revolution operations and go up dress.Most hydraulic oil power source, power supply and fire-fighting water pump are installed on the chassis; When being contained in any angle of revolution on guaranteeing; Dress hydraulic oil, electricity and water can both successfully be supplied with in the chassis; General engineering machinery all adopts centre revolving joint to connect and goes up dress and chassis, upwards to adorn supply hydraulic fluid, electricity and water through centre revolving joint.
Fig. 1 has shown a kind of centre revolving joint that is used for fire-fighting truck; This centre revolving joint comprises the baffle plate 4 of fixed body 1, first solid of rotation 2, second solid of rotation 3 and annular; Has first passage 5 in the said fixed body 1; Has second channel 6 in said second solid of rotation 3; The lower end of said second solid of rotation 3 is inserted said second channel 6 is communicated with said first passage 5; Be provided with first Sealing 7 between said fixed body 1 and said second solid of rotation 3, said first solid of rotation 2 is provided with around said fixed body 1 and between said first solid of rotation 2 and said fixed body 1, is formed with space 9, can be provided with electric elements 8 in this space 9; Said baffle plate 4 is provided with around said second solid of rotation 3 and is integrally formed with said second solid of rotation 3, and the outside of said baffle plate 4 is fixedly connected with said first solid of rotation 2.
When being installed to above-mentioned centre revolving joint on the fire-fighting truck, fixed body 1 being installed on the chassis, and first solid of rotation 2, second solid of rotation 3 are connected together together with baffle plate 4 and last load.When on reinstall when changeing, along with last dress turns round, fire-fighting truck water is along the direction shown in the arrow A flow through first passage 5 and second channel 6 together with baffle plate 4 for first solid of rotation 2, second solid of rotation 3.At this moment, produce relative movement between second solid of rotation 3 and the fixed body 1, first Sealing 7 is with water-stop, and anti-sealing leaks on the electric elements 8.There are following two shortcomings in the centre revolving joint of this kind structure: 1) owing to produce relative movement between second solid of rotation 3 and the fixed body 1; So in long-term movement process, can cause first Sealing 7 to wear and tear, thereby cause first Sealing, 7 places to be leaked.In case leak, water just can flow on the electric elements 8, has a strong impact on the normal use of vehicle.2) because baffle plate 4 is integrally formed with said second solid of rotation 3; So water can't flow out from centre revolving joint is inner when first Sealing 7 leaks; But directly leak inner at centre revolving joint; Thereby be difficult for finding the leakage of first Sealing 7, can not change first Sealing 7 in time.
Summary of the invention
The purpose of this invention is to provide a kind of centre revolving joint that is used for engineering machinery, adopt this centre revolving joint can easily find the leakage of first Sealing, thereby in time first Sealing is changed.
To achieve these goals; The present invention provides a kind of centre revolving joint that is used for engineering machinery; This centre revolving joint comprises the baffle plate of fixed body, first solid of rotation, second solid of rotation and annular, has first passage in the said fixed body, has second channel in said second solid of rotation; The lower end of said second solid of rotation is inserted said second channel is communicated with said first passage; Be provided with first Sealing between said fixed body and said second solid of rotation, said first solid of rotation is around said fixed body setting, wherein; The upper end of said fixed body extends to said baffle plate, and said second solid of rotation and said baffle plate are the parts that are separated from each other.
Preferably, between said first solid of rotation and said fixed body, be formed with the space, this centre revolving joint also comprises electric elements, and this electric elements is arranged in said space.
Preferably, said baffle plate is fixedly connected with said second solid of rotation and/or said first solid of rotation.
Preferably, the inboard of said baffle plate is connected to the upper end of said fixed body, and the lateral overlap of said baffle plate is in the upper end of said first solid of rotation, and said second solid of rotation can be with respect to said baffle plate rotation.
Preferably, said baffle plate and said fixed body are integrally formed.
Preferably, the inboard of said baffle plate is detachably fixed to the upper end of said fixed body.
Preferably, be provided with second Sealing between said fixed body and the said baffle plate.
Preferably, the lower surface of said baffle plate is formed with first bump of annular, and the internal surface of this first bump is formed with second groove, and said second Sealing is arranged in said second groove.
Preferably, the upper end of said first solid of rotation is formed with convex shoulder, and the lower surface of said baffle plate is formed with second bump of annular, and this second bump and said convex shoulder cooperatively interact.
Preferably, said convex shoulder and said second bump are one respectively, and a said convex shoulder is positioned at the inboard of said second bump.
Preferably, said convex shoulder is two, and said second bump is one, and two said convex shoulders lay respectively at the inboard and the outside of said second bump.
When being installed to centre revolving joint provided by the invention on the engineering machinery, fixed body is installed on the chassis, and the turntable of first solid of rotation and last dress is linked together, the indusion tube of second solid of rotation and last dress is linked together.When the swirl gear of last dress drove the turntable revolution, turntable drove the revolution of first solid of rotation, also drove the indusion tube and second solid of rotation of going up dress simultaneously and did rotation motion together, carried flow of liquid through first passage and second channel.At this moment, produce relative movement between second solid of rotation and the fixed body, first Sealing will be carried liquid seal, prevent to carry leak of liquid.When first Sealing took place to leak owing to wearing and tearing, it was outside to carry liquid to arrive through the slot leakage between the fixed body and second solid of rotation, thereby can easily find the leakage of first Sealing, in time first Sealing was changed.
Other features and advantages of the present invention will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with following embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the existing structural representation that is used for the centre revolving joint of engineering machinery;
Fig. 2 is the structural representation of the centre revolving joint that is used for engineering machinery that provides of the specific embodiment of the invention.
Description of reference numerals
1: fixed body; 2: the first solid of rotation; 3: the second solid of rotation; 4: baffle plate; 5: first passage; 6: second channel; 7: the first Sealings; 8: electric elements; 9: the space; 10: convex shoulder; 11: the second Sealings; 12: the first bumps; 13: the second bumps.
Embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
In the present invention; Do not doing under the situation of opposite explanation; The noun of locality that uses all is that situation about being installed on the engineering machinery at the centre revolving joint that is used for engineering machinery provided by the invention is undefined like " upper end ", " lower end ", " lower surface ", " inboard ", " internal surface ", " outside ", i.e. page among Fig. 2.
As shown in Figure 2; The specific embodiment of the invention provides a kind of centre revolving joint that is used for engineering machinery; This centre revolving joint comprises the baffle plate 4 of fixed body 1, first solid of rotation 2, second solid of rotation 3 and annular, has first passage 5 in the said fixed body 1, has second channel 6 in said second solid of rotation 3; The lower end of said second solid of rotation 3 is inserted said second channel 6 is communicated with said first passage 5; Be provided with first Sealing 7 between said fixed body 1 and said second solid of rotation 3, said first solid of rotation 2 is provided with around said fixed body 1, wherein; The upper end of said fixed body 1 extends to said baffle plate 4, said second solid of rotation 3 and the parts of said baffle plate 4 for being separated from each other.
When being installed to centre revolving joint provided by the invention on the engineering machinery, fixed body 1 is installed on the chassis, and the turntable of first solid of rotation 2 with last dress linked together, the indusion tube of second solid of rotation 3 with last dress linked together.When the swirl gear of last dress drove the turntable revolution, turntable drove 2 revolutions of first solid of rotation, also drove the indusion tube and second solid of rotation 3 of going up dress simultaneously and did rotation motion together, carried liquid along the direction shown in the arrow A flow through first passage 5 and second channel 6.At this moment, produce relative movement between second solid of rotation 3 and the fixed body 1, first Sealing 7 will be carried liquid seal, prevent to carry leak of liquid.When first Sealing 7 took place to leak owing to wearing and tearing, it was outside to carry liquid to arrive through the slot leakage between the fixed body 1 and second solid of rotation 3, thereby can easily find the leakage of first Sealing 7, in time first Sealing 7 was changed.
Usually; Between said first solid of rotation 2 and said fixed body 1, be formed with space 9, can in this space 9, arrange various parts as required, for example; The centre revolving joint that is used for engineering machinery provided by the invention can also comprise electric elements 8, and this electric elements 8 is arranged in said space 9.Said electric elements 8 can be common electric slip ring.
According to one embodiment of the present invention, said baffle plate 4 is fixedly connected with said second solid of rotation 3 and/or said first solid of rotation 2.Like this, when centre revolving joint provided by the invention was worked, said baffle plate 4 was with said second solid of rotation 3 and/or 2 rotations of said first solid of rotation.Said baffle plate 4 can be fixedly connected with said second solid of rotation 3 and/or said first solid of rotation 2 through various suitable modes well known in the art, for example is fixedly connected through fastening piece (screw or bolt).
According to another embodiment of the invention, the inboard of said baffle plate 4 is connected to the upper end of said fixed body 1, and the lateral overlap of said baffle plate 4 is in the upper end of said first solid of rotation 2, and said second solid of rotation 3 can be with respect to said baffle plate 4 rotations.Like this, when centre revolving joint provided by the invention was worked, said baffle plate 4 and said fixed body 1 were fixed, and said first solid of rotation 2 can be with respect to said baffle plate 4 and said fixed body 1 rotation with said second solid of rotation 3.
The inboard of said baffle plate 4 can be connected to the upper end of said fixed body 1 through various suitable modes.According to a kind of mode of execution that is used for the centre revolving joint of engineering machinery provided by the invention, said baffle plate 4 and said fixed body 1 are integrally formed.Like this, even first Sealing 7 leaks, carry liquid can inflow space 9 yet in, thereby can protect the parts that are arranged in the space 9 effectively, for example electric elements 8.
According to the another kind of mode of execution that is used for the centre revolving joint of engineering machinery provided by the invention, the inboard of said baffle plate 4 is detachably fixed to the upper end of said fixed body 1.Like this, can assemble easily.The inboard of said baffle plate 4 can be detachably fixed to the upper end of said fixed body 1 through various suitable modes, and the inboard of for example said baffle plate 4 can be passed through fastening piece (like bolt or screw) and be connected with the upper end of said fixed body 1 or be connected with the upper end buckle of said fixed body 1.
According to a kind of preferred implementation provided by the invention, be provided with second Sealing 11 between said fixed body 1 and the said baffle plate 4.Second Sealing 11 is set brings following two advantages: 1) on-the-spot or job site in urgent fire fighting; When carrying liquid to take place to leak at first Sealing, 7 places; Second Sealing 11 can guarantee to carry liquid that can not to leak on the electric elements 8, thereby guarantees carrying out smoothly of fire fighting work or construction operation.2) owing to do not have relative movement between fixed body 1 and the baffle plate 4,, improve sealing reliability so can prolong the working life of second Sealing 11.In addition, only when first Sealing 7 leaked, second Sealing 11 just can be transferred corroded by liquid, thus 11 mosts of the time of second Sealing can not be transferred corroded by liquid, so can further improve sealing reliability.
Said second Sealing 11 can be arranged on the arbitrary position between said fixed body 1 and the said baffle plate 4, between the end face of the end face of for example said fixed body 1 and said baffle plate 4.The setting of second Sealing 11 for ease, preferably, the lower surface of said baffle plate 4 is formed with first bump 12 of annular, and the internal surface of this first bump 12 is formed with the second groove (not shown), and said second Sealing 11 is arranged in said second groove.As shown in Figure 2, said second Sealing 11 carries liquid in space 9, to leak thereby stop effectively between the outer surface of said first bump 12 and said fixed body 1.
Said second Sealing 11 can be various Sealings well known in the art, for example rubber seal, polyurethane seal ring, engineering plastics seal ring or various stuffing box packing.
Be provided with first Sealing 7 between said fixed body 1 and said second solid of rotation 3.The setting of first Sealing 7 for ease, preferably, the internal surface of said fixed body 1 is provided with the first groove (not shown), and said first Sealing 7 is arranged in said first groove.Said first Sealing 7 can be various Sealings well known in the art, for example rubber seal, polyurethane seal ring, engineering plastics seal ring or various stuffing box packing.
The lateral overlap of said baffle plate 4 gets into the inside of centre revolving joint in the upper end of said first solid of rotation 2 to stop rainwater or dust.In order more effectively to stop rainwater or dust to get into the inside of centre revolving joint; As shown in Figure 2; Preferably; The upper end of said first solid of rotation 2 is formed with convex shoulder 10, and the lower surface of said baffle plate 4 is formed with second bump 13 of annular, and this second bump 13 cooperatively interacts with said convex shoulder 10.Quantity to said convex shoulder 10 and said second bump 13 has no particular limits.When said convex shoulder 10 was respectively one with said second bump 13, said convex shoulder 10 can be positioned at the inboard or the outside of said bump 13.According to a kind of preferred implementation that is used for the centre revolving joint of engineering machinery provided by the invention, said convex shoulder 10 is respectively one with said second bump 13, and a said convex shoulder 10 is positioned at the inboard of said second bump 13.According to the another kind of preferred implementation that is used for the centre revolving joint of engineering machinery provided by the invention, said convex shoulder 10 is two, and said second bump 13 is one, and two said convex shoulders 10 lay respectively at the inboard and the outside of said second bump 13.Certainly, as selection, a convex shoulder 10 and 13, one convex shoulders 10 of two second bumps also can be set between two second bumps 13.
The said fixed body 1 and first solid of rotation 2 are generally irregular cylindrical shape.Can on the said fixed body 1 and first solid of rotation 2, the hydraulic circuit (not shown) be set, upwards to adorn supply hydraulic fluid.Said second solid of rotation 3 is generally tubulose, to be connected with indusion tube.Said baffle plate 4 is generally ring.Said first passage 5 forms along the axial direction of said fixed body 1 and said second solid of rotation 3 respectively with second channel 6.Said first passage 5 is used to carry fire-fighting truck water, pump truck to use liquid with concrete slurry or other engineering machinery with second channel 6.
When the centre revolving joint that the specific embodiment of the invention is provided is installed on the engineering machinery, fixed body 1 is installed on the chassis, and the turntable of first solid of rotation 2 with last dress linked together, the indusion tube of second solid of rotation 3 with last dress linked together.When the swirl gear of last dress drove the turntable revolution, turntable drove 2 revolutions of first solid of rotation, also drove the indusion tube and second solid of rotation 3 of going up dress simultaneously and did rotation motion together, carried liquid along the direction shown in the arrow A flow through first passage 5 and second channel 6.
The centre revolving joint that is used for engineering machinery that the specific embodiment of the invention provides has following several advantage:
1) because the upper end of said fixed body 1 extends to said baffle plate 4; Said second solid of rotation 3 and the parts of said baffle plate 4 for being separated from each other; So when first Sealing 7 took place to leak owing to wearing and tearing, it was outside to carry liquid to arrive through the slot leakage between the fixed body 1 and second solid of rotation 3, thereby can easily find the leakage of first Sealing 7; In time first Sealing 7 is changed, thereby can not caused damage the electric elements in the space 98.
2) when said baffle plate 4 and said fixed body 1 form as one, even first Sealing 7 leaks, conveying liquid can inflow space 9 yet in, thereby can protect the parts that are arranged in the space 9 effectively, for example electric elements 8.
3) when the inboard of said baffle plate 4 is detachably fixed to the upper end of said fixed body 1; Owing to be provided with second Sealing 11; So in the on-the-spot or urgent job site of urgent fire fighting; When carrying liquid to take place to leak at first Sealing, 7 places, second Sealing 11 can guarantee to carry liquid that can not to leak on the electric elements 8, thereby guarantees carrying out smoothly of fire fighting work or urgent construction operation.
4) owing to do not have relative movement between fixed body 1 and the baffle plate 4,, improve sealing reliability so can prolong the working life of second Sealing 11.In addition, only when first Sealing 7 leaked, second Sealing 11 just can be transferred corroded by liquid, thus 11 mosts of the time of second Sealing can not be transferred corroded by liquid, so can further improve sealing reliability.
5) because the upper end of said first solid of rotation 2 is formed with convex shoulder 10; The outside of said baffle plate 4 is formed with second bump 13; This second bump 13 cooperatively interacts with said convex shoulder 10, so can more effectively stop rainwater or dust to get into the inside of centre revolving joint.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned mode of execution; In technical conceive scope of the present invention, can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner.
In addition, also can carry out combination in any between the various mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.
Claims (11)
1. centre revolving joint that is used for engineering machinery; This centre revolving joint comprises the baffle plate (4) of fixed body (1), first solid of rotation (2), second solid of rotation (3) and annular; Has first passage (5) in the said fixed body (1); Have second channel (6) in said second solid of rotation (3), the lower end of said second solid of rotation (3) is inserted said second channel (6) is communicated with said first passage (5), is provided with first Sealing (7) between said fixed body (1) and said second solid of rotation (3); Said first solid of rotation (2) is provided with around said fixed body (1); It is characterized in that the upper end of said fixed body (1) extends to said baffle plate (4), said second solid of rotation (3) and said baffle plate (4) parts for being separated from each other.
2. centre revolving joint according to claim 1 wherein, is formed with space (9) between said first solid of rotation (2) and said fixed body (1), this centre revolving joint also comprises electric elements (8), and this electric elements (8) is arranged in said space (9).
3. centre revolving joint according to claim 1 and 2, wherein, said baffle plate (4) is fixedly connected with said second solid of rotation (3) and/or said first solid of rotation (2).
4. centre revolving joint according to claim 1 and 2; Wherein, The inboard of said baffle plate (4) is connected to the upper end of said fixed body (1), and the lateral overlap of said baffle plate (4) is in the upper end of said first solid of rotation (2), and said second solid of rotation (3) can rotate with respect to said baffle plate (4).
5. centre revolving joint according to claim 4, wherein, said baffle plate (4) is integrally formed with said fixed body (1).
6. centre revolving joint according to claim 4, wherein, the inboard of said baffle plate (4) is detachably fixed to the upper end of said fixed body (1).
7. centre revolving joint according to claim 6 wherein, is provided with second Sealing (11) between said fixed body (1) and the said baffle plate (4).
8. centre revolving joint according to claim 7; Wherein, The lower surface of said baffle plate (4) is formed with first bump (12) of annular, and the internal surface of this first bump (12) is formed with second groove, and said second Sealing (11) is arranged in said second groove.
9. centre revolving joint according to claim 4; Wherein, The upper end of said first solid of rotation (2) is formed with convex shoulder (10), and the lower surface of said baffle plate (4) is formed with second bump (13) of annular, and this second bump (13) cooperatively interacts with said convex shoulder (10).
10. centre revolving joint according to claim 9, wherein, said convex shoulder (10) and said second bump (13) are respectively one, and a said convex shoulder (10) is positioned at the inboard of said second bump (13).
11. centre revolving joint according to claim 9, wherein, said convex shoulder (10) is two, and said second bump (13) is one, and two said convex shoulders (10) lay respectively at the inboard and the outside of said second bump (13).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105797375A CN102042450B (en) | 2010-12-06 | 2010-12-06 | Centre revolving joint for engineering machinery |
| PCT/CN2011/075535 WO2012075794A1 (en) | 2010-12-06 | 2011-06-09 | Center rotating coupling for engineer machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105797375A CN102042450B (en) | 2010-12-06 | 2010-12-06 | Centre revolving joint for engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102042450A CN102042450A (en) | 2011-05-04 |
| CN102042450B true CN102042450B (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105797375A Active CN102042450B (en) | 2010-12-06 | 2010-12-06 | Centre revolving joint for engineering machinery |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102042450B (en) |
| WO (1) | WO2012075794A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042450B (en) * | 2010-12-06 | 2012-06-27 | 长沙中联消防机械有限公司 | Centre revolving joint for engineering machinery |
| CN102923571B (en) * | 2012-11-17 | 2014-12-31 | 湖南大汉起重科技有限公司 | Central revolving joint used for crane |
| CN105749464A (en) * | 2016-05-18 | 2016-07-13 | 上海格拉曼国际消防装备有限公司 | Combined agent central gyrorotor device |
| CN112253130B (en) * | 2020-09-07 | 2022-09-27 | 辽宁三三工业有限公司 | Center slewing device |
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| CN102042450B (en) * | 2010-12-06 | 2012-06-27 | 长沙中联消防机械有限公司 | Centre revolving joint for engineering machinery |
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2010
- 2010-12-06 CN CN2010105797375A patent/CN102042450B/en active Active
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2011
- 2011-06-09 WO PCT/CN2011/075535 patent/WO2012075794A1/en active Application Filing
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| EP0359415A1 (en) * | 1988-08-18 | 1990-03-21 | Tokyu Sharyo Seizo Kabushiki Kaisha | Swivel joint for high pressure fluid |
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| Publication number | Publication date |
|---|---|
| CN102042450A (en) | 2011-05-04 |
| WO2012075794A1 (en) | 2012-06-14 |
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Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan Zoomlion emergency equipment Co., Ltd Address before: 410013 Zhonglian Science Park, 361 yinpen South Road, Changsha, Hunan Patentee before: Changsha Zhonglian fire fighting Machinery Co., Ltd |
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