CN204284737U - A kind of centre revolving joint and there is its pump truck - Google Patents

Abstract

The utility model discloses a kind of centre revolving joint and there is its pump truck.Described centre revolving joint comprises stator, and it is fixedly connected with supporting system, and the axial direction of the periphery of stator is provided with conductive hoop; Rotor, it is fixedly connected with cloth system, and be arranged on the outside of stator coaxially, can around stator rotation, the axial direction of the inner circumferential of rotor is provided with static wire, each conductive hoop and corresponding static wire keep electrical contact in rotor and stator in relative rotation process, are provided with annular opening groove, to limit circular groove on the periphery of stator and the inner circumferential of rotor or in the inner circumferential of rotor.Hydraulic oil, electrical signal are sent to cloth system from supporting system by centre revolving joint of the present utility model, and can realize cloth system and turn round at any angle, solve the restriction of cloth system angle of revolution and sebific duct, problem that electric wire is easily wound around damage.

Description

A kind of central rotary joint and its pump car

technical field

The utility model relates to the technical field of concrete conveying machinery, in particular to a central rotary joint and a pump truck with the same.

Background technique

Concrete conveying machinery with a boom usually includes a support system and a distribution system. The supporting system does not move, but the distributing system needs to perform rotary operation. Hydraulic oil power source, power supply and concrete pump are installed on the support system. The hydraulic oil, electric signal and concrete that control the distribution system need to be transmitted from the support system to the distribution system. In the prior art, hydraulic oil is transmitted to the material distribution system through rubber hoses, electrical signals are transmitted to the material distribution system through wires, and concrete is transmitted to the material distribution system through core pipes. When the material distribution system is performing rotary operation, the rubber hoses and wires connecting the support system and the material distribution system will be entangled with each other, making the rubber hoses and wires easily damaged, and also limiting the rotation range of the material distribution system.

Accordingly, it would be desirable to have a swivel center joint that overcomes or at least alleviates at least one of the above-mentioned deficiencies of the prior art.

Utility model content

The object of the present invention is to provide a central swivel joint to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

To achieve the above purpose, the utility model provides a central rotary joint. The central rotary joint includes: a stator, which is fixedly connected to the support system, and has an axial through hole inside, and a conductive ring is provided on the outer periphery of the stator in the axial direction, and the conductive ring is connected to the support system. The corresponding electrical contacts inside are connected; the rotor, which is fixedly connected with the material distribution system, is arranged coaxially on the outside of the stator, can rotate around the stator, and is provided with a conductive The conductive wires are connected to the corresponding electrical contacts in the cloth system, wherein each of the conductive rings is in electrical contact with the corresponding conductive wires during the relative rotation of the rotor and the stator. On the inner circumference of the rotor or on the inner circumference of the rotor, there are axially spaced annular opening grooves to define an annular groove, and the radial inner side communicates with the corresponding oil pipe in the support system, It communicates with the corresponding oil pipe in the cloth system to the outside.

Preferably, a first annular opening groove is provided on the outer periphery of the stator, a second annular opening groove is provided on the inner periphery of the rotor, and the first annular opening groove and the corresponding second annular opening groove are combined to define the Said annular groove.

Preferably, an annular opening groove is provided on the inner periphery of the rotor, and the annular opening groove cooperates with a corresponding part on the outer periphery of the stator to define the annular groove.

Preferably, the stator includes a circuit stator and an oil circuit core that are fixedly connected in the axial direction, the rotor includes a circuit rotor and an oil circuit rotor that are fixedly connected in the axial direction, and the conductive ring is arranged on the circuit stator , the conductive wire is arranged on the circuit rotor, the annular open groove is arranged on the inner circumference of the oil circuit rotator, the oil circuit core is fixedly connected with the support system and the support system, and the oil circuit rotator The body is fixedly connected with the cloth system.

Preferably, sealing rings are provided on both sides of the annular groove in the axial direction of the stator or rotor.

Preferably, two axially spaced support rings are provided between the oil passage core and the oil passage rotator, for supporting the oil passage rotator on the oil passage core in a rotatable manner. physically.

Preferably, a stator cable is provided inside the stator, one end of the stator cable is connected to the conductive ring, and the other end of the stator cable is connected to a corresponding electrical contact in the support system.

Preferably, the inside of the oil circuit core is provided with a core oil port, an axial hole and a radial hole that are connected in sequence, the core oil port communicates with the corresponding oil pipe in the support system, and the radial hole communicate with the annular groove.

Preferably, the rotary body of the oil circuit is provided with a rotary body oil port, one end of the rotary body oil port communicates with the corresponding oil pipe in the distribution system, and the other end of the rotary body oil port communicates with the corresponding annular The slots are connected.

Preferably, the central swivel joint further includes a core tube, the core tube is arranged in the axial through hole, the core tube includes an upper section and a lower section connected in a mutually sealed and rotatable manner, the upper section It is connected with the distribution system, and the lower section is connected with the support system for transferring concrete from the support system to the distribution system.

The utility model also provides a pump truck, which includes the above-mentioned central rotary joint.

The central rotary joint of the utility model transmits hydraulic oil and electrical signals from the support system to the material distribution system, which can realize the rotation of the material distribution system at any angle, and solves the problems of the limitation of the rotation angle of the material distribution system and the easy entanglement and damage of rubber hoses and wires.

Description of drawings

Fig. 1 is a schematic diagram of a central swivel joint according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the central rotary joint shown in Fig. 1 .

Fig. 3 is a schematic bottom view of the central swivel joint shown in Fig. 1 .

Reference signs:

1 Core tube 15 sealing ring 2 circuit rotor 16 Annular groove 3 Rotor positioning plate 17 radial hole 4 Oil circuit rotary body 18 axial hole 5 Swivel oil port 19 Core oil port 6 Oil core flange 20 cable hole 7 Rotor cable twenty one Fixing hole 8 bolt twenty two Oil circuit core 9 support ring twenty three Land 10 stator cable twenty four Axial through hole 11 circuit stator 25 conductive thread 12 connecting flange 26 Butterfly 13 bolt 27 Conductive ring 14 bolt

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model more clear, the technical solution in the utility model embodiment will be described in more detail below in conjunction with the accompanying drawings in the utility model embodiment. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some embodiments of the present utility model, but not all embodiments. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. Embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings.

In describing the present invention, it should be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or It should not be construed as limiting the protection scope of the present invention by implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

The central rotary joint according to the utility model includes a stator and a rotor. The stator is fixedly connected with the supporting system, and an axial through hole is arranged inside it, and a conductive ring is arranged in the axial direction of the outer circumference of the stator, and the conductive ring is connected with corresponding electrical contacts in the supporting system. The rotor is fixedly connected with the material distribution system, and is coaxially arranged on the outside of the stator, and can rotate around the stator, and a conductive wire is arranged on the inner circumference of the rotor in the axial direction, and the conductive wire is connected with the material distribution system. Corresponding electrical contacts in the connection. Wherein, each said conductive ring is in electrical contact with the corresponding conductive wire during the relative rotation of the rotor and the stator. Axially spaced apart annular open grooves are provided on the outer circumference of the stator and the inner circumference of the rotor or on the inner circumference of the rotor to define an annular groove radially inwardly connected to the bearing system It communicates with the corresponding oil pipe inside, and communicates with the corresponding oil pipe in the distribution system on the radial outside.

The above-mentioned central rotary joint transmits hydraulic oil and electrical signals from the support system to the material distribution system, which can realize the rotation of the material distribution system at any angle, and solve the problems of the limitation of the rotation angle of the material distribution system and the easy entanglement and damage of rubber hoses and wires.

Fig. 1 is a schematic diagram of a central swivel joint according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of the central rotary joint shown in Fig. 1 . Fig. 3 is a schematic bottom view of the central swivel joint shown in Fig. 1 .

The central rotary joint includes a circuit stator 11 , an oil circuit core 22 , a circuit rotor 2 , an oil circuit rotary body 4 and a core tube 1 . Wherein, the circuit stator 11 and the oil circuit core 22 are fixedly connected to form a stator. The circuit rotor 2 and the oil circuit rotor 4 are fixedly connected to form the rotor. The stator is fixedly connected to the support system, the rotor is fixedly connected to the material distribution system, and the rotor is coaxially arranged outside the stator and can rotate around the stator.

In the embodiment shown in FIG. 2 , the circuit stator 11 and the oil circuit core 22 are fixedly connected in the axial direction.

The circuit stator 11 is generally hollow cylindrical in shape. A conductive ring 27 is provided in the axial direction of the outer circumference of the circuit stator 11 . The conductive rings 27 are connected to corresponding electrical contacts within the support system. The electrical contact is a point in the circuit in the support system that can be connected with the conductive ring 27 to generate an electrical signal. It can be understood that the number of conductive rings 27 is determined according to the connection circuit. In an advantageous embodiment, as many conductive rings 27 as possible are provided, leaving redundant conductive rings 27 for different product types or for subsequent maintenance.

The shape of the oil passage core 22 is generally a hollow cylinder. The lower end of the oil passage core 22 is provided with an oil passage core flange 6 . The lower end of the oil circuit core 22 is welded on the flange 6 of the oil circuit core. The shape of the oil channel core flange 6 is generally a hollow cylinder. Referring to FIG. 3 , fixing holes 21 are provided on the circumference of the flange 6 of the oil passage core. The flange plate 6 of the oil passage core is fixed to the supporting system by means of bolt connection. That is, the oil passage core 22 is fixedly connected with the supporting system. This means that the stator is fixedly connected to the bearing system.

The oil channel core 22 is provided with a core oil port 19 , an axial hole 18 and a radial hole 17 which are connected in sequence. Specifically, the core oil port 19 is arranged at the bottom of the oil passage core 22 , and the central axis of the core oil port 19 is arranged parallel to the central axis of the oil passage core 22 . The lower end of the core oil port 19 communicates with the corresponding oil pipe in the support system. The central axis of the axial hole 18 is arranged parallel to the central axis of the oil passage core 22 . And the lower end of the axial hole 18 communicates with the upper end of the core oil port 19 . The central axis of the radial hole 17 is arranged perpendicular to the central axis of the oil channel core 22 . And one end of the radial hole 17 communicates with the side surface of the axial hole 18 .

Referring to FIG. 2 and FIG. 3 , a cable through hole 20 is provided inside the oil circuit core 22 . The cable through hole 20 penetrates from the upper end of the oil passage core 22 to the lower end of the oil passage core 22 . The stator cable 10 is arranged inside the oil circuit core 22 . The stator cables 10 are arranged in the cable passages 20 . And the upper end of the stator cable 10 is connected to the conductive ring 27, and the lower end of the stator cable 10 is connected to the corresponding electrical contact in the supporting system.

The electric circuit stator 11 and the oil circuit core 22 are connected together through the connection plate 23 . The connection plate 23 is arranged between the electric circuit stator 11 and the oil circuit core 22 . The shape of the connecting pad 23 is a hollow cylinder. Specifically, the upper end of the connection plate 23 and the lower end of the circuit stator 11 are connected together by the first bolt 13 . The lower end of the connection plate 23 and the upper end of the oil passage core 22 are connected together by the second bolt 14 , so that the circuit stator 11 and the oil passage core 22 are fixedly connected together.

Axial through holes 24 are provided at the central axes of the oil circuit core 22 , the circuit stator 11 and the connection plate 23 . That is to say, an axial through hole 24 is provided inside the stator.

Referring to FIG. 2 , the circuit rotor 2 and the oil circuit rotor 4 are fixedly connected in the axial direction.

The circuit rotor 2 is sleeved on the outside of the circuit stator 11 . Conductive wires 25 are arranged in the axial direction of the inner circumference of the circuit rotor 2 , and the conductive wires 25 are connected to corresponding electrical contacts in the fabric distribution system. The electrical contact is a point in the circuit in the cloth system that can be connected to the conductive thread 25 to generate an electrical signal. And each conductive ring 27 maintains electrical contact with the corresponding conductive wire 25 during the relative rotation of the rotor and the stator. A butterfly 26 is disposed between the conductive wire 25 and the conductive ring 27 . Make the conductive wire 25 communicate with the conductive ring 27, and at the same time keep the electrical contact between the circuit stator 11 and the circuit rotor 2 during the relative rotation.

Referring to Fig. 2, the top of the circuit rotor 2 is provided with a rotor cable 7, the upper end of the rotor cable 7 is connected to the distribution system, and the lower end of the rotor cable 7 is connected to the conductive wire 25 for transmitting electrical signals from the support system to the distribution system .

The oil passage rotary body 4 is sleeved on the outside of the oil passage core 22 . A rotor positioning plate 3 is arranged on the outer surface of the oil circuit rotating body 4 . The rotor positioning plate 3 is fixedly connected with the material distribution system, that is to say, the rotor is fixedly connected with the material distribution system. Since the material distribution system can rotate relative to the support system, the rotor positioning plate 3 can drive the rotor to rotate around the stator.

In the illustrated embodiment, six annular opening grooves axially spaced apart are arranged on the inner circumference of the oil circuit rotating body 4 . And the annular opening groove cooperates with the corresponding part on the outer circumference of the oil passage core 22 (ie, the end of the radial hole 17 ) to define six annular grooves 16 . That is to say, the annular groove 16 communicates with the corresponding oil pipe in the support system (eg, through the core oil port 19 , the axial hole 18 and the radial hole 17 ) on the radial inner side of the rotor.

The annular groove 16 is annular in shape. And the annular groove 16 communicates with the radial hole 17 . It can be understood that the number of core oil ports 19 , axial holes 18 , radial holes 17 and annular grooves 16 are equal. It can be understood that the number of annular grooves 16 can be set in multiples. For example, the number of annular grooves 16 is 3, 4, or other multiples.

It should be understood that the form of the annular groove 16 is not limited to the illustrated embodiment. In an embodiment not shown in the figure, first annular opening grooves axially spaced apart are arranged on the outer periphery of the oil circuit core body, and second annular opening grooves axially spaced apart are arranged on the inner periphery of the oil circuit rotating body . The first annular open groove and the corresponding second annular open groove are joined together to define an annular groove. The radial inner side of the first annular open groove communicates with the corresponding oil pipe in the support system (for example, through the core oil port, the axial hole and the radial hole). The radially outer side of the first annular opening groove communicates with the corresponding oil pipe in the material distribution system (for example, through the oil port of the rotary body).

Referring to FIG. 1 , a rotary body oil port 5 is provided on the oil circuit rotary body 4 . One end of the oil port 5 of the rotary body (that is, the open end shown in Figure 1) communicates with the corresponding oil pipe in the distribution system, and the other end of the oil port 5 of the rotary body (that is, the invisible end in Figure 1) communicates with the corresponding annular The open grooves (that is, the annular groove 16 in this embodiment) communicate with each other. Used to transfer hydraulic oil from the support system to the distribution system. Due to the different arrangement positions of the annular grooves 16, the arrangement heights of the rotary body oil ports 5 are also different. The setting position between the oil ports 5 of the rotary body is an inclined line, which is beneficial to prevent the superposition of the oil passages. It can be understood that the embodiments in which the position between the oil ports 5 of the rotary body is a vertical line, a horizontal line or other shapes are all within the protection scope of the present invention. And the number of the rotary body oil port 5 and the annular groove 16 is also equal.

The circuit rotor 2 and the oil circuit rotor 4 are connected together through a connecting flange 12 . Specifically, the upper end of the connecting flange 12 and the lower end of the circuit rotor 2 are welded together, and the lower end of the connecting flange 12 and the upper end of the oil circuit rotor 4 are fixed together by bolts 8, thereby connecting the circuit rotor 2 and the oil circuit The revolving bodies 4 are connected together.

It should be pointed out that the machining accuracy of the oil circuit rotator 4 and the oil circuit core 22 is relatively high, and the materials of the oil circuit rotator 4 and the oil circuit core 22 are different from those of the circuit stator 11 and the circuit rotor 2, so need to be processed separately.

In the axial direction of the stator or rotor, a sealing ring 15 is provided on both sides of the annular groove 16 (ie, the upper side and the lower side of the annular groove 16 shown in FIG. 2 ) for sealing.

Two axially spaced support rings 9 (see FIG. 2 ) are provided between the oil circuit core 22 and the oil circuit rotary body 4 for rotatably supporting the oil circuit rotary body 4 on the oil circuit. on the road core body 22 . The support ring 9 is fixed on the oil circuit core 22 by interference fit or other appropriate methods, and cooperates with the corresponding annular groove 16 on the oil circuit rotary body 4, so as to guide the movement of the oil circuit rotary body 4 relative to the oil circuit core 22. Rotational movement.

The core pipe 1 is arranged in the axial through hole 24 . The core pipe 1 includes an upper section and a lower section connected in a mutually sealed and rotatable manner. The upper section of the core pipe 1 is connected with the distribution system, and the lower section of the core pipe 1 is connected with the support system, and is used for transferring concrete from the support system to the distribution system.

The central swivel joint can transmit hydraulic oil and electrical signals from the support system to the distribution system.

The specific transmission route of hydraulic oil from the support system to the material distribution system is: the hydraulic oil on the support system flows into the oil port 5 of the rotary body through the core oil port 19, the axial hole 18, the radial hole 17, and the annular groove 16, and then The hydraulic oil is sent to the distribution system through the oil port 5 of the rotary body.

The specific transmission route of the electrical signal transmission channel from the support system to the cloth system is as follows: the electrical signal on the support system is transmitted to the conductive ring 27 on the circuit stator 11 through the stator cable 10, and then to the conductive wire 25 through the conductive ring 27, and finally to the conductive wire 25. to the rotor cable 7, and then through the rotor cable 7, the electrical signal is transmitted from the support system to the cloth system.

The utility model also provides a pump truck, which includes the above-mentioned central rotary joint.

The central rotary joint of the utility model transmits hydraulic oil and electrical signals from the support system to the material distribution system, and can realize the rotation of the material distribution system at any angle, solving the problems of the limitation of the rotation angle of the material distribution system and the easy entanglement and damage of rubber hoses and wires.

Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solution of the present utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features; and These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (11)

1. A central swivel joint, characterized in that it comprises: The stator, which is fixedly connected with the support system, is provided with an axial through hole inside, and a conductive ring (27) is provided in the axial direction of the outer circumference of the stator, and the conductive ring (27) is connected with the inner surface of the support system. The corresponding electrical contact connection; The rotor is fixedly connected with the material distribution system, coaxially arranged on the outside of the stator, and can rotate around the stator, and a conductive wire (25) is arranged on the inner circumference of the rotor in the axial direction, and the The conductive thread (25) is connected with the corresponding electric contact in the cloth system, Wherein, each said conductive ring (27) maintains electrical contact with the corresponding conductive wire (25) during the relative rotation of the rotor and the stator, on the outer circumference of the stator and the inner circumference of the rotor or on the The inner circumference of the rotor is provided with axially spaced annular open grooves to define annular grooves, which communicate with corresponding oil pipes in the support system on the radially inner side and communicate with corresponding oil pipes in the material distribution system on the radially outer side . 2. The central rotary joint according to claim 1, characterized in that, a first annular opening groove is provided on the outer periphery of the stator, a second annular opening groove is arranged on the inner periphery of the rotor, and the first annular opening groove is provided on the inner periphery of the rotor. The annular opening groove and the corresponding second annular opening groove cooperate to define the annular groove. 3 . The central rotary joint according to claim 1 , wherein an annular opening groove is provided on the inner circumference of the rotor, and the annular opening groove cooperates with a corresponding part on the outer circumference of the stator to define the annular groove. 4 . 4. The central rotary joint according to claim 3, characterized in that, the stator includes a circuit stator (11) and an oil circuit core (22) fixedly connected in the axial direction, and the rotor includes a The circuit rotor (2) and the oil circuit rotor (4) are fixedly connected, the conductive ring (27) is arranged on the circuit stator (11), and the conductive wire (25) is arranged on the circuit rotor (2). The annular opening groove is arranged on the inner circumference of the oil passage rotary body (4), the oil passage core (22) is fixedly connected with the support system and the support system, and the oil passage rotary body (4) is connected with the fabric The system is permanently connected. 5. The central rotary joint according to claim 1, characterized in that, in the axial direction of the stator or rotor, sealing rings (15) are provided on both sides of the annular groove (16). 6. The central rotary joint according to claim 4, characterized in that, two axially spaced support rings (9) are arranged between the oil circuit core (22) and the oil circuit rotary body (4) ), used to rotatably support the oil passage rotary body (4) on the oil passage core (22). 7. The central rotary joint according to claim 1, characterized in that, a stator cable (10) is arranged inside the stator, one end of the stator cable (10) is connected to the conductive ring (27), and the stator cable (10) is connected to the conductive ring (27). The other end of the stator cable (10) is connected to a corresponding electrical contact within the support system. 8. The central swivel joint according to claim 4, characterized in that, the oil passage core (22) is provided with core oil ports (19), axial holes (18) and radial holes connected in sequence (17), the core oil port (19) communicates with the corresponding oil pipe in the support system, and the radial hole (17) communicates with the annular groove (16). 9. The central rotary joint according to claim 4, characterized in that, the rotary body (4) of the oil circuit is provided with a rotary body oil port (5), and one end of the rotary body oil port (5) is connected to the The corresponding oil pipes in the above-mentioned material distribution system are connected, and the other end of the oil port (5) of the rotary body is connected with the corresponding annular groove (16). 10. The central swivel joint according to claim 1, characterized in that it further comprises a core-through tube (1), the core-through tube (1) is arranged in the axial through hole (24), the through-hole The core pipe (1) includes an upper section and a lower section connected in a mutually sealed and rotatable manner, the upper section is connected with the material distribution system, and the lower section is connected with the support system for transferring concrete from the support system to the The cloth system described above. 11. A pump truck, characterized by comprising the central rotary joint according to any one of claims 1-10.