CN212455894U

CN212455894U - Hydraulic swivel joint, electro-hydraulic swivel connecting device and work vehicle

Info

Publication number: CN212455894U
Application number: CN202022210722.3U
Authority: CN
Inventors: 贺电; 耿晓晨; 谢天贶
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-02-02
Anticipated expiration: 2030-09-30

Abstract

The utility model provides a hydraulic pressure swivel joint, electric liquid gyration connecting device and operation vehicle, hydraulic pressure swivel joint includes: the mandrel is provided with a plurality of axial holes and a plurality of first holes, the axial holes are arranged at intervals along the circumferential direction of the mandrel, and the axial holes and the first holes are communicated in a one-to-one correspondence manner; the shell sets up on the periphery of dabber, and in the axial direction of shell, the interval is provided with a plurality of second trompils. The technical scheme of the utility model, hydraulic pressure rotary joint is when keeping original big flow capacity, can reduce the volume of self to make full use of hydraulic pressure rotary joint's inner space, solved among the correlation technique hydraulic pressure rotary joint's installation space when limited, can't satisfy the problem that hydraulic pressure rotary joint's big flow required, and then ensure that hydraulic pressure rotary joint in this application can satisfy the installation requirement in less space, can satisfy the through-flow requirement of great flow again.

Description

Hydraulic swivel joint, electro-hydraulic swivel connecting device and work vehicle

Technical Field

The utility model relates to an electricity liquid rotary joint's connection technical field particularly, relates to a hydraulic pressure rotary joint and, electricity liquid rotary connecting device and working vehicle.

Background

At present, the diameter of an axial opening of a hydraulic swivel joint in the related art is large, so that the volume of the hydraulic swivel joint in the related art is large, and when the installation space of the hydraulic swivel joint is limited, in order to meet the installation requirement, the diameter of the axial opening can only be reduced to reduce the volume of the hydraulic swivel joint. However, in the related art, the axial holes in the hydraulic swivel joint are arranged in one-to-one correspondence with the second holes in the housing, and the reduction in the diameter of the axial holes inevitably results in a reduction in the flow capacity of the hydraulic swivel joint, and thus the requirement for large flow of the hydraulic swivel joint cannot be met. In other words, it is desired to open a hydraulic swivel joint having a large flow capacity and a small volume.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, an object of the utility model is to provide a hydraulic pressure swivel joint.

Another object of the utility model is to provide an electricity liquid gyration connecting device.

Another object of the present invention is to provide a work vehicle.

In order to achieve the above object, an embodiment of the utility model provides a hydraulic swivel joint, hydraulic swivel joint includes: the mandrel is provided with a plurality of axial holes and a plurality of first holes, the axial holes are arranged at intervals along the circumferential direction of the mandrel, the axial holes and the first holes are communicated in a one-to-one correspondence mode, one end of each first hole is communicated with the axial hole, and the other end of each first hole is located on the outer circumferential surface of the mandrel; the shell is sleeved on the periphery of the mandrel, and second openings are formed in the shell at intervals along the axial direction of the shell; wherein one second opening communicates with at least two first openings.

In the technical scheme, the axial opening of a large aperture is set to be a plurality of axial openings of small apertures, a plurality of first openings which are communicated with the axial openings in a one-to-one correspondence mode are correspondingly arranged, and in order to ensure that the hydraulic rotary joint achieves the through-flow capacity of the axial opening of the large aperture, a second opening is set to be communicated with the first openings at the same time. Make the hydraulic pressure rotary joint in this application when keeping original big through-flow ability like this, can reduce the volume of self to make full use of hydraulic pressure rotary joint's inner space, when having solved hydraulic pressure rotary joint's installation space among the correlation technique and having limited, can't satisfy the problem that hydraulic pressure rotary joint's big through-flow required, and then ensure that hydraulic pressure rotary joint in this application can satisfy the installation requirement in less space, can satisfy the through-flow requirement of great flow again.

Additionally, the utility model provides a hydraulic pressure swivel joint in above-mentioned embodiment can also have following additional technical characterstic:

in the above technical scheme, the mandrel is further provided with an axial through hole, and the axial through hole penetrates through the mandrel along the axial direction of the mandrel.

In the technical scheme, the axial through hole is used as a through hole, so that a conveying pipeline of a pumping product can pass through the axial through hole conveniently, the conveying pipeline can be smoothly installed, and the pumping product can normally work.

In any of the above technical solutions, the plurality of first openings are arranged along a radial direction of the mandrel; the second trompil includes at least two, and the outer end of every second trompil is located the outside of shell, and the inner end of every second trompil passes through circumferential ring groove and at least two first trompils intercommunication.

In this technical scheme, first trompil extends the setting in the radial direction of dabber, and first trompil is straight hole promptly, has avoided setting first trompil to the big and with high costs problem of the processing degree of difficulty that the inclined hole leads to, has improved the convenience of first trompil processing like this, has reduced hydraulic pressure rotary joint's processing manufacturing cost simultaneously.

In any one of the above technical solutions, the housing includes a housing and a plurality of protrusions disposed on the housing, the plurality of protrusions protrude in a direction away from the mandrel along a radial direction of the housing, and outer ends of the plurality of second openings are disposed on the plurality of protrusions in a one-to-one correspondence manner.

In the technical scheme, the plurality of protrusions can be matched and connected with the plurality of external connecting pipelines in a one-to-one correspondence manner, for example, clamping connection or locking connection is achieved, the clamping mechanism or the locking mechanism on the connecting pipelines can be locked on the outer peripheral surfaces of the protrusions, the problem of oil leakage at the connecting position of the connecting pipelines and the hydraulic rotary joint is avoided, the connecting pipelines and the hydraulic rotary joint can be correctly connected, and therefore the hydraulic rotary joint can normally work.

In any of the above solutions, the hydraulic swivel joint further includes a plurality of sealing members, and the plurality of sealing members are disposed between the mandrel and the housing. The plurality of seals may include O-rings and/or lip-type metal seal rings.

In this technical scheme, the sealing member can prevent that outside dust or granule from entering into the annular space that forms between dabber and the shell, pollutes the interior oil circuit of hydraulic swivel joint to ensure that the medium from hydraulic swivel joint output satisfies the cleanliness factor requirement of its follow-up use. In addition, the sealing element can separate a plurality of oil paths in the hydraulic rotary joint, and the influence on the through-flow capacity of the hydraulic rotary joint caused by the mutual crossing of the plurality of oil paths in the hydraulic rotary joint is avoided, so that the hydraulic rotary joint can meet the through-flow requirement. The O-shaped sealing ring is low in price, the selectable range of specification and size is large, and therefore the subsequent maintenance and replacement of the sealing element are facilitated, and the maintenance cost of the hydraulic swivel joint is saved. Of course, lip-type metal sealing rings can be adopted as the sealing elements according to actual conditions.

In any of the above technical solutions, the mandrel has a first end face and a second end face disposed opposite to the first end face, the mandrel is provided with a plurality of sealing grooves disposed at intervals in the axial direction, the plurality of sealing members are disposed in the plurality of sealing grooves, at least one sealing groove is disposed between a second opening hole closest to the first end face in the plurality of second opening holes and the first end face, at least one sealing groove is disposed between a second opening hole closest to the second end face in the plurality of second opening holes and the second end face, and at least one sealing groove is disposed between any two adjacent second opening holes in the plurality of second opening holes.

In this technical scheme, the sealing member that sets up on the seal groove that is close to first terminal surface and is close to the second terminal surface is used for preventing that outside dust or granule from entering into the annular space that forms between dabber and the shell, pollutes the oil circuit in the hydraulic swivel joint to ensure that the medium from hydraulic swivel joint output satisfies the cleanliness factor requirement of its follow-up use. The sealing element arranged between any two adjacent second holes is used for separating a plurality of oil paths in the hydraulic rotary joint, so that the influence on the through-flow capacity of the hydraulic rotary joint caused by the mutual channeling of the plurality of oil paths in the hydraulic rotary joint is avoided, and the hydraulic rotary joint can meet the through-flow requirement.

In any of the above technical solutions, the housing has a third end face and a fourth end face disposed opposite to the third end face, the housing is provided with a plurality of sealing grooves disposed at intervals in the axial direction, the plurality of sealing members are disposed in the plurality of sealing grooves, at least one sealing groove is disposed between a second opening hole closest to the third end face in the plurality of second opening holes and the third end face, at least one sealing groove is disposed between a second opening hole closest to the fourth end face in the plurality of second opening holes and the fourth end face, and at least one sealing groove is disposed between any two adjacent second opening holes in the plurality of second opening holes.

In this technical scheme, the sealing member that sets up on the seal groove that is close to the third terminal surface and is close to the fourth terminal surface is used for preventing that outside dust or granule from entering into the annular space that forms between dabber and the shell, pollutes the oil circuit in the hydraulic swivel joint to ensure that the medium from hydraulic swivel joint output satisfies the cleanliness factor requirement of its follow-up use. The sealing element arranged between any two adjacent second holes is used for separating a plurality of oil paths in the hydraulic rotary joint, so that the influence on the through-flow capacity of the hydraulic rotary joint caused by the mutual channeling of the plurality of oil paths in the hydraulic rotary joint is avoided, and the hydraulic rotary joint can meet the through-flow requirement.

The utility model discloses the technical scheme of second aspect provides an electricity liquid gyration connecting device, and electricity liquid gyration connecting device includes to establish the electric slip ring in the periphery of hydraulic pressure gyration joint as the hydraulic pressure gyration joint of any one of the technical scheme of the first aspect and cover.

The utility model discloses the electric liquid gyration connecting device that technical scheme of second aspect provided, because of including the hydraulic pressure rotary joint of any one in the first aspect technical scheme, therefore have all beneficial effects that any one of the above-mentioned technical scheme had, no longer describe herein.

In the technical scheme, the electric sliding ring is sleeved on the hydraulic rotary joint, the combined mode of nested arrangement enables the structure of the electro-hydraulic rotary connecting device to be compact, the occupied space of the hydraulic rotary joint is saved, and the function integration of an electric passage and a liquid passage of the electro-hydraulic rotary connecting device is realized on the premise of not obviously increasing the volume of the electro-hydraulic rotary connecting device, so that the electro-hydraulic composite connection requirement of the electro-hydraulic rotary connecting device is met.

In the above technical solution, the electrical slip ring includes: the electric slip ring body is sleeved on the periphery of the shell; the electric slip ring rotor lead-out end is arranged on the mandrel, and a conduction circuit is arranged between the electric slip ring rotor lead-out end and the electric slip ring body; and the electric slip ring stator outlet end is arranged on the electric slip ring body.

In this technical scheme, electricity slip ring rotor leading-out terminal is connected with external power source, can switch on the electric slip ring with outside electric current to for the rotary motion of electric liquid gyration connecting device provides the power supply, and then ensure that electric liquid gyration connecting device can normally work. In addition, the electric slip ring can avoid the problem that the wires are wound and damaged in the rotating process while transmitting power, so that the normal work of the electro-hydraulic rotary connecting device is ensured.

The utility model discloses technical scheme of third aspect provides an operation vehicle, include: a chassis; the operation device is rotatably arranged on the chassis; the hydraulic swivel joint according to any one of the first aspect through the claims, wherein the hydraulic swivel joint is arranged between the chassis and the working device; or as in any one of the second aspect technical solutions, the electro-hydraulic slewing connection device is disposed between the chassis and the working device.

In the technical scheme, the working vehicle is provided with the hydraulic rotary joint, so that the working vehicle has the function of rotatably connecting the hydraulic pipeline, the connection requirement of the hydraulic pipeline during field pumping operation is met, the working vehicle is provided with the electro-hydraulic rotary connecting device, so that the working vehicle has the function of rotatably connecting the hydraulic pipeline and the electric wire, the connection requirement of the hydraulic pipeline and the electric wire during field pumping operation is met, and the field pumping operation is ensured to be smoothly carried out.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a hydraulic swivel joint according to an embodiment of the present invention;

FIG. 2 shows a cross-sectional view of the hydraulic swivel joint A-A of FIG. 1;

FIG. 3 shows a perspective view of the mandrel of FIG. 1;

fig. 4 shows a schematic perspective view of an electro-hydraulic swivel connection according to an embodiment of the present invention;

FIG. 5 shows a cross-sectional view of the electro-hydraulic swivel connection of FIG. 4 at B-B.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:

10. a mandrel; 11. a first end face; 12. axially opening a hole; 13. a second end face; 14. a first opening; 16. an axial through hole; 20. a housing; 22. a second opening; 23. a housing; 24. a protrusion; 26. a third end face; 28. a fourth end face; 30. a seal member; 40. an electrical slip ring; 42. an electrical slip ring body; 44. an electric slip ring rotor outlet end; 46. an electric slip ring stator outlet terminal; 50. sealing the groove.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Hydraulic swivel joints and electro-hydraulic swivel connections according to some embodiments of the present invention are described below with reference to fig. 1-5.

As shown in fig. 1 and 2, embodiments of the present invention provide a hydraulic swivel joint, which includes a mandrel 10 and a housing 20. Wherein the mandrel 10 has a plurality of axial openings 12 and a plurality of first openings 14, the plurality of axial openings 12 being spaced apart along the circumference of the mandrel 10. The plurality of axial openings 12 and the plurality of first openings 14 are communicated in a one-to-one correspondence manner, one end of each first opening 14 is communicated with the corresponding axial opening 12, and the other end of each first opening 14 is located on the outer peripheral surface of the mandrel 10. The housing 20 is sleeved on the periphery of the mandrel 10, and second openings 22 are arranged on the housing 20 at intervals along the axial direction of the housing 20. A second opening 22 communicates with at least two of the first openings 14.

In the above arrangement, one large-diameter axial opening 12 is provided as a plurality of small-diameter axial openings 12, and correspondingly, a plurality of first openings 14 are provided in one-to-one communication with the plurality of axial openings 12, and in order to ensure the flow capacity of the hydraulic swivel joint reaching the large-diameter axial opening 12, one second opening 22 is provided in simultaneous communication with the plurality of first openings 14. Make the hydraulic pressure rotary joint in this application when keeping original big through-flow ability like this, can reduce the volume of self to make full use of hydraulic pressure rotary joint's inner space, when having solved hydraulic pressure rotary joint's installation space among the correlation technique and having limited, can't satisfy the problem that hydraulic pressure rotary joint's big through-flow required, and then ensure that hydraulic pressure rotary joint in this application can satisfy the installation requirement in less space, can satisfy the through-flow requirement of great flow again.

It should be noted that, the hydraulic swivel joint in this application adopts a distributed oil path design (one large-aperture axial opening 12 is separately set to be a plurality of small-aperture axial openings 12, the plurality of small-aperture axial openings 12 are communicated with a plurality of first openings 14 in a one-to-one correspondence, and one second opening 22 is communicated with the plurality of first openings 14 at the same time), so that the size of the hydraulic swivel joint is reduced effectively under the condition of the same through-flow capacity. In addition, the number of axial openings 12 may be set according to the actual through-flow requirements and installation size requirements of the hydraulic swivel joint.

Specifically, as shown in fig. 1 to 5, in an embodiment of the present invention, an axial through hole 16 is further disposed on the mandrel 10, and the axial through hole 16 penetrates through the mandrel 10 along an axial direction of the mandrel 10.

In the above arrangement, the axial through hole 16 is used as a through hole for the delivery pipeline of the pumping product to pass through, so as to ensure that the delivery pipeline can be smoothly installed, and further ensure that the pumping product can normally work.

Specifically, as shown in fig. 2 and 5, in the embodiment of the present invention, the plurality of first openings 14 are extended in the radial direction of the mandrel 10. The number of the second openings 22 is three, an outer end of each second opening 22 is located outside the housing 20, and an inner end of each second opening 22 is communicated with at least two first openings 14 through a circumferential ring groove.

In the above arrangement, the first opening 14 extends in the radial direction of the mandrel 10, that is, the first opening 14 is a straight hole, so that the problems of large processing difficulty and high cost caused by setting the first opening 14 as an inclined hole are solved, the convenience of processing the first opening 14 is improved, and the processing and manufacturing cost of the hydraulic rotary joint is reduced.

Specifically, as shown in fig. 1 and 4, in an embodiment of the present invention, the housing 20 includes a casing 23 and a plurality of protrusions 24 disposed on the casing 23, the plurality of protrusions 24 protrude in a radial direction of the housing 20 toward a direction away from the mandrel 10, and outer ends of the plurality of second openings 22 are disposed on the plurality of protrusions 24 in a one-to-one correspondence.

In the above arrangement, the plurality of protrusions 24 can be in one-to-one matching connection with a plurality of external connecting pipelines, such as clamping connection or locking connection, and the clamping mechanism or the locking mechanism on the connecting pipelines can be locked on the outer peripheral surface of the protrusions 24, so as to avoid the problem of oil leakage at the connection position of the connecting pipelines and the hydraulic rotary joint, so that the connecting pipelines and the hydraulic rotary joint can be correctly connected, and the hydraulic rotary joint can normally work.

Specifically, as shown in fig. 2 and 5, in the embodiment of the present invention, the hydraulic swivel joint further includes a plurality of sealing members 30, and the plurality of sealing members 30 are disposed between the mandrel 10 and the housing 20.

In the above arrangement, the sealing element 30 can prevent external dust or particles from entering the annular space formed between the mandrel 10 and the housing 20 to contaminate the oil path in the hydraulic swivel joint, thereby ensuring that the medium output from the hydraulic swivel joint meets the cleanliness requirement for subsequent use. In addition, the sealing element 30 can separate a plurality of oil paths in the hydraulic rotary joint, and the condition that the plurality of oil paths in the hydraulic rotary joint mutually run to influence the through-flow capacity of the hydraulic rotary joint is avoided, so that the hydraulic rotary joint can meet the through-flow requirement.

It should be noted that the single oil passage in the present application refers to the oil passage formed by each second opening 22 of the hydraulic rotary joint and the plurality of first openings 14 and the plurality of axial openings 12 communicated therewith. The number of the plurality of oil passages in the hydraulic swivel joint is the same as the number of the second openings 22, that is, the hydraulic swivel joint has several second openings 22, and accordingly, the hydraulic swivel joint includes several oil passages.

Specifically, as shown in fig. 2 and 4, in an embodiment of the present invention, the sealing groove 50 is disposed on the housing 20, the housing 20 has a third end surface 26 and a fourth end surface 28 opposite to the third end surface 26, the housing 20 is provided with a plurality of sealing grooves 50 disposed along the axial direction at intervals, the plurality of sealing members 30 are disposed in the plurality of sealing grooves 50, between the second opening hole 22 closest to the third end surface 26 in the plurality of second opening holes 22 and the third end surface 26, the plurality of sealing grooves 50 are disposed, between the second opening hole 22 closest to the fourth end surface 28 in the plurality of second opening holes 22 and the fourth end surface 28, the plurality of sealing grooves 50 are disposed, and a plurality of sealing grooves 50 are disposed between any two adjacent second opening holes 22 in the plurality of second opening holes 22.

In the above arrangement, the sealing element 30 disposed on the sealing groove 50 near the third end surface 26 and the fourth end surface 28 is used to prevent external dust or particles from entering the annular space formed between the mandrel 10 and the housing 20 and contaminating the oil path in the hydraulic swivel joint, thereby ensuring that the medium output from the hydraulic swivel joint meets the cleanliness requirement for subsequent use. The sealing element 30 arranged between any two adjacent second openings 22 is used for separating a plurality of oil paths in the hydraulic rotary joint, so that the influence on the through-flow capacity of the hydraulic rotary joint caused by the mutual crossing of the plurality of oil paths in the hydraulic rotary joint is avoided, and the hydraulic rotary joint can meet the through-flow requirement.

It should be noted that the sealing member 30 disposed between any two adjacent second openings 22 is configured to separate a plurality of oil passages in the hydraulic swivel joint by isolating the annular space formed between the mandrel 10 and the housing 20. By adopting the partition mode, when the shell 20 and the mandrel 10 rotate relatively, a plurality of oil paths are still separated, so that the hydraulic rotary joint has the through-flow capacity with a large through-diameter when the hydraulic rotary joint rotates, and the through-flow requirement of the hydraulic rotary joint is further met.

Of course, according to practical circumstances, the above-mentioned sealing groove 50 may be disposed on the mandrel 10, specifically, the mandrel 10 has a first end surface 11 and a second end surface 13 disposed opposite to the first end surface 11, a plurality of sealing grooves 50 are disposed on the mandrel 10 at intervals along the axial direction, a plurality of sealing members 30 are disposed in the plurality of sealing grooves 50, at least one sealing groove 50 is disposed between the second opening 22 closest to the first end surface 11 of the plurality of second openings 22 and the first end surface 11, at least one sealing groove 50 is disposed between the second opening 22 closest to the second end surface 13 of the plurality of second openings 22 and the second end surface 13, and at least one sealing groove 50 is disposed between any adjacent two second openings 22 of the plurality of second openings 22.

Of course, according to practical circumstances, the above-mentioned part of the sealing groove 50 may be disposed on the mandrel 10, and another part of the sealing groove 50 may be disposed on the casing 20, specifically, a plurality of sealing grooves 50 are disposed on the casing 20 at intervals in the axial direction, a plurality of sealing members 30 are disposed in the plurality of sealing grooves 50, a plurality of sealing members 30 are disposed on the mandrel 10 at intervals in the axial direction, a plurality of sealing members 30 are disposed in the plurality of sealing grooves 50, at least one sealing groove 50 (disposed on the casing 20 or the mandrel 10) is disposed between the second opening 22 closest to the first end surface 11 and the first end surface 11 in the plurality of second openings 22, at least one sealing groove 50 (disposed on the casing 20 or the mandrel 10) is disposed between the second opening 22 closest to the second end surface 13 in the plurality of second openings 22, at least one sealing groove 50 (disposed on the casing 20 or the mandrel 10) is disposed between any two adjacent second openings 22 in the plurality of second openings 22.

Specifically, as shown in fig. 2, in an embodiment of the present invention, the plurality of sealing elements 30 includes O-rings. In the above arrangement, the O-ring is cheap, and the range of specification and size selection is large, so that the subsequent maintenance and replacement of the sealing element 30 are facilitated, and the maintenance and maintenance cost of the hydraulic swivel joint is saved. Of course, the sealing member 30 may be a lip-type metal sealing ring.

Specifically, as shown in fig. 4 and 5, the present invention also provides an electro-hydraulic swivel connection apparatus including a hydraulic swivel joint according to any one of the embodiments of the first aspect and an electrical slip ring 40 provided on the hydraulic swivel joint.

In the above arrangement, because the electric slip ring 40 is sleeved on the hydraulic rotary joint, the combined mode of the nested arrangement makes the structure of the electro-hydraulic rotary connecting device compact, saves the occupied space of the hydraulic rotary joint, and realizes the function integration of the electric path and the liquid path of the electro-hydraulic rotary connecting device on the premise of not obviously increasing the volume of the electro-hydraulic rotary connecting device, thereby meeting the electro-hydraulic composite connection requirement of the electro-hydraulic rotary connecting device.

Specifically, as shown in fig. 4, in an embodiment of the present invention, the electrical slip ring 40 includes an electrical slip ring body 42, an electrical slip ring rotor outlet 44, and an electrical slip ring stator outlet. The electrical slip ring body 42 is sleeved on the periphery of the housing 20, the electrical slip ring rotor lead-out terminal 44 is arranged on the mandrel 10, and a conduction circuit is arranged between the electrical slip ring rotor lead-out terminal 44 and the electrical slip ring body 42. Electrical slip ring stator outlet 46 is disposed on electrical slip ring body 42.

In the above arrangement, the electrical slip ring rotor outlet 44 is connected to an external power supply, and can conduct external current to the electrical slip ring 40, so as to provide a power source for the rotation motion of the electro-hydraulic rotation connection device, thereby ensuring that the electro-hydraulic rotation connection device can work normally. In addition, the electric slip ring 40 can also avoid the problem that the wires are wound and damaged in the rotating process while transmitting power, so that the normal work of the electro-hydraulic rotary connecting device can be ensured.

The utility model discloses the electric liquid gyration connecting device that technical scheme of second aspect provided, because of including the hydraulic pressure rotary joint of any one in the first aspect embodiment, therefore have all beneficial effects that any one of the above-mentioned embodiments had, no longer describe herein.

It should be noted that, by referring to the patent documents and looking up the existing products of the electro-hydraulic rotary connection device for similar applications on the market, it is found that most of the products of the electro-hydraulic rotary connection device in the related art adopt a stacked manner to realize the composite connection of the electric path and the liquid path, that is, the electric slip ring 40 is seated on the hydraulic rotary joint to be integrated into one product. The utility model discloses break away from conventional hydraulic swivel joint's design, adopted the oil circuit of distributing type to arrange, make full use of hydraulic swivel joint's inner space has solved the contradiction of limited size and big flow capacity. Meanwhile, the electric slip ring 40 and the hydraulic rotary joint are arranged in a nested manner, and all functional parts are arranged in a limited volume.

The electro-hydraulic rotary connecting device has the following advantages:

1. and the volume of the hydraulic swivel joint is effectively reduced by adopting distributed oil circuit arrangement under the condition of not reducing the through-flow capacity.

2. By adopting the scheme that the electric slip ring 40 and the hydraulic rotary joint are nested, the integration of the functions of an electric passage and a liquid passage of the hydraulic rotary joint is completed on the premise of not obviously increasing the volume of the hydraulic rotary joint.

3. The electro-hydraulic rotary connecting device has a hollow inner part, and the middle part is used for arranging a pumping product conveying pipe.

4. The hydraulic rotary joint in the scheme can be actually applied to pumping products by equipment, so that the pump truck is free from the limitation of a rotary angle.

The utility model also provides an operation car, including chassis, operation device and as in the first aspect implement arbitrary hydraulic pressure swivel joint, perhaps as in the second aspect embodiment arbitrary electric liquid gyration connecting device. The hydraulic rotary joint is arranged between the chassis and the operation device, and the electro-hydraulic rotary connecting device is arranged between the chassis and the operation device. In the above arrangement, the working vehicle is provided with the hydraulic swivel joint, so that the working vehicle has the function of swivel-connecting the hydraulic pipeline, thereby meeting the connection requirement of the hydraulic pipeline during field pumping operation, and the working vehicle is provided with the electro-hydraulic swivel connecting device, so that the working vehicle has the function of swivel-connecting the hydraulic pipeline and the electric wire, thereby meeting the connection requirement of the hydraulic pipeline and the electric wire during field pumping operation, and further ensuring that the field pumping operation can be smoothly carried out.

The working vehicle in the present application is not limited to a pump vehicle, and may be a construction vehicle or equipment such as a fire truck or a crane.

From the above description, it can be seen that the axial opening 12 of a large bore is provided as a plurality of axial openings 12 of a small bore, and correspondingly a plurality of first openings 14 are provided in one-to-one communication with the plurality of axial openings 12, and in order to ensure the flow capacity of the hydraulic swivel joint to the axial opening 12 of a large bore, a second opening 22 is provided in simultaneous communication with the plurality of first openings 14. Make the hydraulic pressure rotary joint in this application when keeping original big through-flow ability like this, can reduce the volume of self to make full use of hydraulic pressure rotary joint's inner space, when having solved hydraulic pressure rotary joint's installation space among the correlation technique and having limited, can't satisfy the problem that hydraulic pressure rotary joint's big through-flow required, and then ensure that hydraulic pressure rotary joint in this application can satisfy the installation requirement in less space, can satisfy the through-flow requirement of great flow again.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic swivel joint, characterized in that, hydraulic swivel joint includes:

the mandrel (10) is provided with a plurality of axial holes (12) and a plurality of first holes (14), the plurality of axial holes (12) are arranged at intervals along the circumferential direction of the mandrel (10), the plurality of axial holes (12) and the plurality of first holes (14) are arranged in a one-to-one correspondence mode in a communication mode, one end of each first hole (14) is communicated with the corresponding axial hole (12), and the other end of each first hole (14) is located on the outer circumferential surface of the mandrel (10);

the shell (20) is sleeved on the periphery of the mandrel (10), and second open holes (22) are formed in the shell (20) at intervals along the axial direction of the shell (20);

wherein one of the second openings (22) communicates with at least two of the first openings (14).

2. The hydraulic swivel joint according to claim 1, characterized in that an axial through hole (16) is further provided on the spindle (10), the axial through hole (16) penetrating the spindle (10) in the axial direction of the spindle (10).

3. The hydraulic swivel joint according to claim 1, characterized in that a plurality of said first apertures (14) are provided in a radial direction of said spindle (10); the second opening holes (22) comprise at least two, the outer end of each second opening hole (22) is located on the outer side of the shell (20), and the inner end of each second opening hole (22) is communicated with at least two first opening holes (14) through a circumferential annular groove.

4. The hydraulic swivel joint according to any one of claims 1 to 3, characterized in that the housing (20) comprises a housing (23) and a plurality of protrusions (24) provided on the housing (23), the plurality of protrusions (24) protruding in a radial direction of the housing (20) in a direction away from the mandrel (10), and outer ends of the plurality of second openings (22) are provided on the plurality of protrusions (24) in one-to-one correspondence.

5. The hydraulic swivel joint according to any one of claims 1-3, characterized in that it further comprises a plurality of seals (30), a plurality of said seals (30) being arranged between the spindle (10) and the housing (20), a plurality of said seals (30) comprising O-rings and/or lip-type metal sealing rings.

6. The hydraulic swivel joint of claim 5, wherein the mandrel (10) has a first end surface (11) and a second end surface (13) opposite to the first end surface (11), the mandrel (10) is provided with a plurality of sealing grooves (50) axially spaced apart from each other, the plurality of sealing members (30) are disposed in the plurality of sealing grooves (50), at least one sealing groove (50) is disposed between the second opening (22) of the plurality of second openings (22) closest to the first end surface (11) and the first end surface (11), at least one sealing groove (50) is disposed between the second opening (22) of the plurality of second openings (22) closest to the second end surface (13) and the second end surface (13), at least one sealing groove (50) is disposed, and at least one sealing groove (50) is disposed between any adjacent two of the plurality of second openings (22) .

7. The hydraulic swivel joint of claim 5, wherein the housing (20) has a third end surface (26) and a fourth end surface (28) opposite the third end surface (26), a plurality of axially spaced seal grooves (50) are formed in the housing (20), a plurality of the seals (30) are disposed in the seal grooves (50), at least one of the seal grooves (50) is disposed between the second opening (22) of the second openings (22) closest to the third end surface (26) and the third end surface (26), at least one of the seal grooves (50) is disposed between the second opening (22) of the second openings (22) closest to the fourth end surface (28) and the fourth end surface (28), at least one of the seal grooves (50) is disposed, and at least one of the seal grooves (50) is disposed between any adjacent two of the second openings (22) .

8. Electro-hydraulic swivel connection, characterized in that it comprises a hydraulic swivel joint according to any of claims 1 to 7 and an electrical slip ring (40) fitted around the outer circumference of the hydraulic swivel joint.

9. Electro-hydraulic swivel connection arrangement according to claim 8, characterized in that the electrical slip ring (40) comprises:

the electric slip ring body (42) is sleeved on the periphery of the shell (20);

the electric slip ring rotor lead-out end (44) is arranged on the mandrel (10), and a conducting circuit is arranged between the electric slip ring rotor lead-out end (44) and the electric slip ring body (42);

and the electric slip ring stator outlet end (46) is arranged on the electric slip ring body (42).

10. A work vehicle, characterized by comprising:

a chassis;

the working device is rotatably arranged on the chassis;

the hydraulic swivel joint of any one of claims 1-7 disposed between the chassis and the work implement; or an electro-hydraulic swivel connection as claimed in claim 8 or 9, disposed between the chassis and the working device.