CN102705619B - Water, electricity and liquid multi-channel center revolving joint and engineering machinery with same - Google Patents
Water, electricity and liquid multi-channel center revolving joint and engineering machinery with same Download PDFInfo
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- CN102705619B CN102705619B CN201210177456.6A CN201210177456A CN102705619B CN 102705619 B CN102705619 B CN 102705619B CN 201210177456 A CN201210177456 A CN 201210177456A CN 102705619 B CN102705619 B CN 102705619B
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Abstract
The invention discloses a water, electricity and liquid multi-channel center revolving joint and engineering machinery with the same. The water, electricity and liquid multi-channel center revolving joint comprises a body core, an oil channel revolving body, an electricity channel revolving body and a water channel revolving body, wherein an axial through hole through which the water channel revolving body passes is formed in the centers of the body core and the electricity channel revolving body; the oil channel revolving body is sleeved outside the body core; the water channel revolving body passes through the axial through hole of the body core and an electricity channel stator; and the lower end of the water channel revolving body is communicated with a lower frame connecting water pipe. The water channel revolving body is a straight-through pipe which passes through the centers of the oil channel revolving body and the electricity channel revolving body, and the center of the body core is completely used as a water channel, so that the space of the body core can be fully utilized, the structure is simplified, and the size is reduced; and meanwhile, a corner is eliminated in the straight-through water channel, so that the pressure loss of water flow can be reduced, and the joint is convenient to install.
Description
Technical field
The present invention relates generally to engineering machinery field, particularly a kind of multi-path central rotation joint for water/electricity/liquid, and has the engineering machinery of this multi-path central rotation joint for water/electricity/liquid.
Background technique
A lot of engineering machinery (as high-altitude fire fighting truck, high-jetting vehicle etc.) all has upper dress and chassis.Operationally, chassis is motionless, and upper dress needs 360 degree revolution operation.Major part hydraulic oil power source, power supply and fire-fighting water are installed on chassis, during in order to ensure to be contained in any angle of revolution, chassis successfully can supply and fill hydraulic oil, electricity and water, general employing centre revolving joint connects dress and chassis, to realize the transmission safe and reliable between upper dress and chassis of water, hydraulic oil and electrical signal.
Multi-path central rotation joint for water/electricity/liquid generally includes mandrel, water route solid of rotation, oil circuit solid of rotation, circuit solid of rotation, and the assembly driving each solid of rotation to rotate, mandrel is wherein fixedly mounted on vehicle frame, and water route solid of rotation and oil circuit solid of rotation are set on mandrel, rotate around mandrel.There is following problem in this structural design:
1, mandrel space is underused, and overall structure volume is comparatively large, takes up room larger;
2, the flow of the centre revolving joint hydraulic oil that can transmit and water is little, and has 90 degree of corners because of water route, and the pressure loss is larger;
3, solid of rotation radial dimension in water route is large, causes centre revolving joint to install inconvenient.
Therefore, need to provide novel multi-path central rotation joint for water/electricity/liquid, overcome the problems referred to above.
Summary of the invention
In view of this, the present invention proposes a kind of multi-path central rotation joint for water/electricity/liquid and has the engineering machinery of this joint, and it can make full use of body core space, reduces structural volume, can reduce water flow pressure loss simultaneously, and convenient installation.
To achieve these goals, one aspect of the present invention provides a kind of multi-path central rotation joint for water/electricity/liquid, comprises body core, oil circuit solid of rotation, circuit solid of rotation, water route solid of rotation, wherein,
The center of described body core and described circuit solid of rotation offers the axial hole passed for water route solid of rotation;
Described oil circuit solid of rotation is set in the outside of described body core;
Described water route solid of rotation passes from the axial hole of described body core and described circuit solid of rotation, and the lower end of described water route solid of rotation is communicated with connecting water pipe of getting off.
Further, described circuit solid of rotation is arranged on the top of described body core, comprises circuit stator and circuit rotor, wherein,
Described circuit stator is connected with described body core or one-body molded, and described circuit rotor is connected with described oil circuit solid of rotation; Described circuit stator center offers the axial hole passed for water route solid of rotation.
Further, also comprise mounting bracket, described water route solid of rotation is connected by described mounting bracket with described oil circuit solid of rotation, and described mounting bracket is also for being connected with turntable.
Further, described body core is cylindrical, is provided with the first axial passage and radial passage, and described first axial passage is communicated with described radial passage, and described first axial passage is at the ft connection of described body core lower end and described body core; The outer circumferential face of described body core offers circular groove with corresponding part, described radial passage;
Described oil circuit solid of rotation offers the radial direction through hole for outside fuel feeding, described radial direction through hole is communicated with the radial passage of described body core by the circular groove of described body core.
Further, the upper end of described body core is fixedly connected with gland, and described gland covers the upper-end surface of described oil circuit solid of rotation at least partly.
Further, the outer circumferential face of described body core offers guiding groove, is provided with the guide ring supporting described oil circuit solid of rotation and rotate in described guiding groove.
Further, described body core lower end is connected with lower end cap, and described lower end cap offers the second axial passage and radial direction through hole; Described second axial passage is communicated with described radial passage, and described radial direction through hole is in communication with the outside, and described second axial passage is communicated with the first axial passage of described body core;
The center of described lower end cap also offers the axial hole passed for described water route solid of rotation, and the lower end of described water route solid of rotation is positioned at the axial hole of described lower end cap.
Further, described body core outer circumferential face also offers the first seal groove, in described first seal groove, is provided with Sealing, for the sealing between described oil circuit solid of rotation and described body core;
The inwall of the axial hole of described lower end cap offers the second seal groove with solid of rotation corresponding part, described water route, and is provided with Sealing in described second seal groove.
Further, described lower end cap entirety is prismatic; The side of the corresponding prism of radial direction through hole of described lower end cap is arranged.
Further, described circuit stator is connected with the stator cable leading to chassis by conductive hoop; Described circuit rotor is connected with the rotor cable leading to upper dress by static wire.
Another aspect of the present invention also provides a kind of engineering machinery, and it is provided with multi-path central rotation joint for water/electricity/liquid as above.
Water route of the present invention solid of rotation is designed to pass through the straight-through revolution water pipe at oil circuit solid of rotation and circuit solid of rotation center, Ti Xin center is used as waterway channel completely, the outside sheathed oil circuit solid of rotation of body core, on the one hand, body core space is fully utilized, the periphery at Ti Xin center can, all for arranging oil circuit, increase the flow of centre revolving joint transmission hydraulic oil and water, and overall structure be simple, compact; On the other hand, water route solid of rotation makes water route linearly arrange, eliminates 90 ° of corners, reduces the pressure loss of current, and reduce the radial dimension of water route solid of rotation, be convenient to the installation of centre revolving joint.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation that the invention provides a kind of multi-path central rotation joint for water/electricity/liquid embodiment;
Fig. 2 is the partial sectional view of the embodiment shown in Fig. 1;
Fig. 3 is the partial sectional view of the different amount of the embodiment shown in Fig. 1.
Reference numerals list:
1-bolt, 2-gets off connecting water pipe, 3-lower end cap, 4-oil circuit solid of rotation, 5-bolt, 6-first axial passage, 7-mounting bracket, 8-bolt, the radial passage of 9-body core, 10-screw, the radial direction through hole of 11-lower end cap, 12-second axial passage, 13-circuit rotor, 14-bolt, 15-circular groove, 16-water route solid of rotation (revolution water pipe), 17-upper junction plate, 18-dust cover, 19-rotor cable, 20-circuit stator, 21-adpting flange, 22-bolt, the radial direction through hole of 23-oil circuit solid of rotation, 24-gland, 25-guiding groove, 26-body core, 27-first seal groove, 28-pad, 29-seal ring, 30-second seal groove, 31-locating stud, 32-stator cable, 33-bolt.
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Basic thought of the present invention is: the water route solid of rotation with 90 ° of turnings of the prior art is improved to straight-through water route, and pass from body core inner, body core inner revolution water pipe peripheral disposition oil circuit, circuit, make full use of body core inner space, multi-path central rotation joint for water/electricity/liquid overall volume is reduced, this improvement both can reduce hydraulic losses, can reduce again volume, be convenient to install.
Be the embodiment of a kind of multi-path central rotation joint for water/electricity/liquid provided by the invention as Figure 1-3, comprise body core 26, oil circuit solid of rotation 4, circuit solid of rotation, water route solid of rotation 16, wherein, the center of body core 26 and circuit solid of rotation offers the axial hole passed for water route solid of rotation 16; Oil circuit solid of rotation 4 is set in the outside of body core 26; Water route solid of rotation 16 is the revolution water pipe passed from the axial hole of body core 26 and circuit solid of rotation, and the lower end of water route solid of rotation 16 is communicated with connecting water pipe 2 of getting off.
The multi-path central rotation joint for water/electricity/liquid provided of the present invention, its water route solid of rotation 16 is designed to pass through the straight-through water route at body core 26 and circuit solid of rotation center, Ti Xin 26 center is used as waterway channel completely, the outside sheathed oil circuit solid of rotation 4 of body core 26, on the one hand, body core 26 space is fully utilized, and the periphery at Ti Xin 26 center can all for arranging oil circuit, increase the flow of centre revolving joint transmission hydraulic oil and water, and overall structure is simple, compact; On the other hand, the structure of water route solid of rotation 16 makes water route linearly arrange, eliminates 90 ° of corners, reduces the pressure loss of current, and reduce the radial dimension of water route solid of rotation 16, be convenient to the installation of centre revolving joint.
As shown in Figures 2 and 3, water route solid of rotation 16 may be embodied as the siphunculus passed from body core 26 and circuit solid of rotation center, in this, as revolution water pipe; Also the through hole of body core 26 and circuit solid of rotation inside directly can be utilized as water route, and connect revolution water pipe in upper end, water route.
As a preferred embodiment, as shown in Figures 2 and 3, circuit solid of rotation of the present invention is arranged on the top of body core 26, comprise circuit stator 20 and circuit rotor 13, wherein, circuit stator 20 is connected with body core 26 or one-body molded, and circuit rotor 13 is connected with oil circuit solid of rotation 4; Circuit stator 20 center offers the axial hole passed for water route solid of rotation 16.Now, water route solid of rotation 16 passes the axial hole at circuit stator 20 and Ti Xin 26 center from top to bottom successively.
It should be noted that, although the present invention using above circuit solid of rotation is arranged on body core 26 as preferred embodiment, but, according to the difference of design requirement, also circuit solid of rotation can be arranged on the below of body core 26, two kinds of mode of executions are just different on position relationship, and the core of its mentality of designing is all adopt straight-through water route solid of rotation 16; Only be arranged on based on above body core 26 for circuit solid of rotation herein and the various embodiments of centre revolving joint are discussed in more detail.
Conveniently during centre revolving joint work of the present invention, water route solid of rotation 16 and oil circuit solid of rotation 4 synchronous revolving, the present invention can also comprise mounting bracket 7 on the basis of above-described embodiment, water route solid of rotation 16 is connected by mounting bracket 7 with oil circuit solid of rotation 4, and mounting bracket 7 is also for being connected with turntable.As shown in figures 1 and 3, water route solid of rotation 16 is fixedly installed upper junction plate 17, this upper junction plate 17 is connected with the upper end of mounting bracket 7 by bolt 14, the lower end of mounting bracket 7 is fixedly connected with oil circuit solid of rotation 4 by bolt 5, realizes the synchronous rotary of water route solid of rotation 16 and oil circuit solid of rotation 4 thus.In addition, as Figure 1-3, circuit rotor 13 and oil circuit solid of rotation 4 preferably adopt adpting flange 21 and screw 10 to be connected.When turntable rotates, mounting bracket 7 is driven to rotate, oil circuit solid of rotation 4, water route solid of rotation 16, circuit rotor 13 synchronous rotary thereupon.
Ti Xin 26 center in above-described embodiment has axial hole, and axial hole periphery all for arranging oil circuit, and can be communicated with outer sheathed oil circuit solid of rotation 4 oil circuit of body core 26, outside fuel feeding.Because the axial hole peripheral space range of choices of body core 26 is comparatively large, oil circuit arranges and according to different demands, can be designed to different arrangements.
As a kind of preferred embodiment of body core 26, body core 26 can be cylindrical, it can be provided with the first axial passage 6 and radial passage 9, first axial passage 6 is communicated with radial passage 9, and the first axial passage 6 is at the ft connection of body core 26 lower end and body core 26; The outer circumferential face of body core 26 offers circular groove 15 with corresponding part, radial passage 9; Oil circuit solid of rotation 4 offers the radial direction through hole 23 for outside fuel feeding, this radial direction through hole 23 is communicated with the radial passage 9 of body core 26 by the circular groove 15 of body core 26.
Hydraulic oil flows into body core 26 from body core 26 bottom, then successively through the first axial passage 6 and the radial passage 9 of body core 26, flow to the circular groove 15 of body core 26, radial direction through hole 23 on oil circuit solid of rotation 4 is corresponding with circular groove 15 position, no matter what position oil circuit solid of rotation 4 rotates to, can oil circuit be realized unimpeded, fuel feeding is carried out to outside.
Oil circuit solid of rotation 4, in rotary course, may move relative to body core 26 vertically, and move up to limit oil circuit solid of rotation 4, the upper end of body core 26 of the present invention is preferably fixedly connected with gland 24, and gland 24 covers oil circuit solid of rotation 4 at least partly.Gland 24 circular, and the axial hole passed for water route solid of rotation 16 is also offered at the center of gland 24, and corresponding with the axial hole position of body core 26.Gland 24 diameter should slightly larger than the diameter of body core 26, to cover oil circuit solid of rotation 4 at least partly, restriction rotator shaft is to moving up.As shown in Figure 2, gland 24 is arranged on the upper end of body core 26 by bolt 22, and circuit stator 20 is then fixedly installed on gland 24 by bolt 8, and then is connected with body core 26.According to the above-mentioned discussion to body core 26 and circuit stator 20, body core 26 and circuit stator 20 can be one-body molded, if the two is formed in one, then gland 24 corresponding position can be designed as the flange identical with gland 24 shape, to reach the effect of gland 24.
Gland 24 of the present invention can also adopt other shapes, also can adopt two-piece type or multi-part type composition, and evenly be arranged on the excircle of body core 26 upper end, and outwardly more a part of than body core 26 excircle, at least part of covering oil circuit solid of rotation 4, limits it and moves up.Gland 24 of the present invention can be fixedly connected with body core 26 upper end by bolt or screw, and should be noted that when installing, reserved certain space between the best and axial solid of rotation of gland 24, avoid because of with oil circuit solid of rotation 4 close contact and produce larger friction, ensure oil circuit solid of rotation 4 smooth rotation.
Space between the oil circuit solid of rotation 4 of multi-path central rotation joint for water/electricity/liquid of the present invention and body core 26, can realize rotating swimmingly relative to body core 26 to make oil circuit solid of rotation 4, body core 26 outer circumferential face offers guiding groove 25, is provided with the guide ring supporting oil circuit solid of rotation 4 and rotate in guiding groove 25.Guiding groove 25 is similar to the effect of bearing with the effect of guide ring, for oil circuit solid of rotation 4 provides lubrication and supporting effect relative to rotating of body core 26.As shown in Figure 2, guiding groove 25 is preferably opened in top and/or the bottom of body core 26.
For the ease of the connection on center sub and lower vehicle frame or chassis, ensure that the connection of water route and oil circuit is unobstructed, body core 26 lower end of the present invention can also be connected with lower end cap 3, and lower end cap 3 offers the second axial passage 12 and radial direction through hole 11; Second axial passage 12 is communicated with radial direction through hole 11, and radial direction through hole 11 is in communication with the outside, and the second axial passage 12 is communicated with the first axial passage 6 of body core 26; The center of lower end cap 3 also offers the axial hole passed for water route solid of rotation 16, and the lower end of water route solid of rotation 16 extends downward in the axial hole of lower end cap 3.Water route solid of rotation 16 is communicated with connecting water pipe 2 of getting off by the axial hole of lower end cap 3; The first axial passage 6 in body core 26 is communicated with radial direction through hole 11, as the oil circuit of multi-path central rotation joint for water/electricity/liquid successively with the second axial passage 12 in lower end cap 3.As shown in Figure 2, body core 26 preferably uses bolt 33 to be connected with lower end cap 3, and body core 26 offers locating slot with the corresponding position of lower end cap 3 surface of contact, and arranges locating stud 31 wherein, facilitates location and installation; In addition, in order to ensure the sealing between lower end cap 3 and the axial hole be interconnected of body core 26, the periphery of the axial hole between lower end cap 3 and body core 26 is also provided with seal ring 29.Further, be also provided with pad 28 between body core 26 and lower end cap 3, this packing ring 28 is preferably copper backing.
In volume allowed band, multiple first axial passage 6 and radial passage 9 can be offered in body core 26 inside, correspondingly, multiple radial direction through hole 23 can be offered in oil circuit solid of rotation 4, multiple second axial passage 12 and radial direction through hole 11 can be offered, to increase the flux of hydraulic fluid flow paths in the inside of lower end cap 3.
Further, lower end cap 3 of the present invention is preferably prismatic, and the side of the corresponding prism of radial direction through hole 11 is arranged, and on the one hand, makes the outlet of radial direction through hole 11 be positioned on side, and conveniently on smooth side, external pipeline is communicated with radial direction through hole 11; On the other hand, lower end cap 3 is designed to prismatic, can reduce its volume and deadweight, and is convenient to install.As shown in Figure 1, lower end cap 3 of the present invention is preferably eight prismatic, also can be pentagonal prism, six prisms etc.It should be noted that, lower end cap 3 can also be designed to off-gauge prismatic, e.g., has little arcuate flanks between the side of prism and side, such shape circumferentially evenly cuts out flat side on cylindrical side, side with side and non-immediate be connected.
According to the discussion of the various embodiments described above, a fixed gap is had between the body core 26 of multi-path central rotation joint for water/electricity/liquid of the present invention and oil circuit solid of rotation 4, therefore, the first seal groove 27 can be offered on body core 26 outer circumferential face, Sealing is provided with, for the sealing between oil circuit solid of rotation 4 and body core 26 in first seal groove 27.It should be noted that, although the present invention is not construed as limiting the particular location of the first seal groove 27 on body core 26 outer circumferential face, but, those skilled in the art are to be understood that, first seal groove 27 quantity is multiple, and the first seal groove 27 all should be offered in the below of the top of the circular groove 15 of the topmost part of body core 26, the circular groove 15 of foot, also preferably offers the first seal groove 27 between circular groove 15.
In addition, as shown in Figures 2 and 3, water route solid of rotation 16 is communicated with connecting water pipe 2 water route of getting off by the axial hole of lower end cap 3, connecting water pipe 2 two ends of getting off are fixedly connected with flange respectively, upper flanges and lower end cap 3 is connected by screw (or bolt) 1, and lower end Flange joint is got off water pipe (not shown).Can rotate freely to realize water route solid of rotation 16, the inwall of the axial hole of itself and lower end cap 3 preferably adopts Spielpassung, and can not adopt and coordinate too closely, therefore, the inwall of the axial hole of lower end cap 3 also offers the second seal groove 30 with water route solid of rotation 16 corresponding part, and be provided with Sealing in the second seal groove 30, anti-sealing runs off along the outer wall of water route solid of rotation 16.
Because body core 26 of the present invention is relative with lower end cap 3 fixing, need not rotate, its inner stator cable 32 that allows passes through, and the conductive hoop that circuit stator 20 is arranged by lower end is connected with stator cable 32, and stator cable 32 leads to chassis; Circuit rotor 13 is connected with the rotor cable 19 leading to upper dress by static wire, when rotor and stator relatively rotate, just can realize the transmission of electrical signal.As shown in Figure 2, above circuit solid of rotation, be provided with dust cover 18, contribute to preventing dust etc. from entering in circuit solid of rotation the normal work affecting circuit rotor 13 and circuit stator 20 in real work.
In sum, multi-path central rotation joint for water/electricity/liquid of the present invention has the following advantages:
1, the inner space of body core is fully utilized, and the radial dimension of water route solid of rotation reduces greatly; The overall structure of centre revolving joint is simple, compact, and spatial volume is little;
2, the space of body in-core is fully for arranging oil circuit and water route, and the flow of the hydraulic oil that centre revolving joint can transmit and water is large, and water route solid of rotation is designed to straight-through water route, and the pressure loss of current is little;
3, easy for installation.
Correspondingly, the present invention also provides a kind of engineering machinery, is provided with multi-path central rotation joint for water/electricity/liquid as above.According to prior art, use the field of this type of multi-path central rotation joint for water/electricity/liquid a lot, therefore this project machinery can comprise Elevating platform fire truck, high-jetting vehicle, aerial ladder apparatus etc. widely.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a multi-path central rotation joint for water/electricity/liquid, comprise body core (26), oil circuit solid of rotation (4), circuit solid of rotation, water route solid of rotation (16), wherein, described oil circuit solid of rotation (4) is set in the outside of described body core (26), and the lower end in described water route solid of rotation (16) is communicated with connecting water pipe of getting off (2); It is characterized in that,
The center of described body core (26) and described circuit solid of rotation offers the axial hole passed for water route solid of rotation (16);
Described water route solid of rotation (16) is passed from the axial hole of described body core (26) and described circuit solid of rotation.
2. multi-path central rotation joint for water/electricity/liquid according to claim 1, is characterized in that, described circuit solid of rotation is arranged on the top of described body core (26), comprises circuit stator (20) and circuit rotor (13), wherein,
Described circuit stator (20) is connected with described body core (26) or one-body molded, and described circuit rotor (13) is connected with described oil circuit solid of rotation (4); Described circuit stator (20) center offers the axial hole passed for water route solid of rotation (16).
3. multi-path central rotation joint for water/electricity/liquid according to claim 2, it is characterized in that, also comprise mounting bracket (7), described water route solid of rotation (16) is connected by described mounting bracket (7) with described oil circuit solid of rotation (4), and described mounting bracket (7) is also for being connected with turntable.
4. multi-path central rotation joint for water/electricity/liquid according to claim 2, it is characterized in that, described body core (26) is for cylindrical, be provided with the first axial passage (6) and radial passage (9), described first axial passage (6) is communicated with described radial passage (9), and described first axial passage (6) is at the ft connection of described body core (26) lower end and described body core (26); The outer circumferential face of described body core (26) offers circular groove (15) with described radial passage (9) corresponding part;
Described oil circuit solid of rotation (4) offers the radial direction through hole (23) for outside fuel feeding, described radial direction through hole (23) is communicated with the radial passage (9) of described body core (26) by the circular groove (15) of described body core (26).
5. multi-path central rotation joint for water/electricity/liquid according to claim 4, it is characterized in that, the upper end of described body core (26) is fixedly connected with gland (24), and described gland (24) covers the upper-end surface of described oil circuit solid of rotation (4) at least partly.
6. multi-path central rotation joint for water/electricity/liquid according to claim 5, it is characterized in that, the outer circumferential face of described body core (26) offers guiding groove (25), is provided with the guide ring supporting described oil circuit solid of rotation (4) and rotate in described guiding groove (25).
7. the multi-path central rotation joint for water/electricity/liquid according to any one of claim 2-5, it is characterized in that, described body core (26) lower end is connected with lower end cap (3), and described lower end cap (3) offers the second axial passage (12) and radial direction through hole (11); Described second axial passage (12) is communicated with described radial direction through hole (11), described radial direction through hole (11) is in communication with the outside, and described second axial passage (12) is communicated with first axial passage (6) of described body core (26);
The center of described lower end cap (3) also offers the axial hole passed for described water route solid of rotation (16), and the lower end in described water route solid of rotation (16) is positioned at the axial hole of described lower end cap (3).
8. multi-path central rotation joint for water/electricity/liquid according to claim 7, it is characterized in that, described body core (26) outer circumferential face also offers the first seal groove (27), Sealing is provided with, for the sealing between described oil circuit solid of rotation (4) and described body core (26) in described first seal groove (27);
The inwall of the axial hole of described lower end cap (3) offers the second seal groove (30) with solid of rotation (16) corresponding part, described water route, and is provided with Sealing in described second seal groove (30).
9. multi-path central rotation joint for water/electricity/liquid according to claim 8, is characterized in that, described lower end cap (3) entirety is prismatic; The side of radial direction through hole (11) the corresponding prism of described lower end cap (3) is arranged.
10. multi-path central rotation joint for water/electricity/liquid according to claim 9, is characterized in that, described circuit stator (20) is connected with the stator cable (32) leading to chassis by conductive hoop; Described circuit rotor (13) is connected with the rotor cable (19) leading to upper dress by static wire.
11. 1 kinds of engineering machinery, is characterized in that, are provided with as the multi-path central rotation joint for water/electricity/liquid in claim 1-10 as described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177456.6A CN102705619B (en) | 2012-05-31 | 2012-05-31 | Water, electricity and liquid multi-channel center revolving joint and engineering machinery with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177456.6A CN102705619B (en) | 2012-05-31 | 2012-05-31 | Water, electricity and liquid multi-channel center revolving joint and engineering machinery with same |
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| CN102705619A CN102705619A (en) | 2012-10-03 |
| CN102705619B true CN102705619B (en) | 2015-06-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111928043B (en) * | 2020-07-31 | 2022-01-25 | 三一汽车制造有限公司 | Center swivel joint, hydraulic control system and work vehicle |
| CN112628507B (en) * | 2020-10-14 | 2022-05-24 | 杭州安杰诺智能机械有限公司 | Pneumatic rotary joint structure |
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| CN102705619A (en) | 2012-10-03 |
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