A five-axis cradle turntable hydraulic system

Abstract

The present invention discloses a five-axis cradle turntable hydraulic system, wherein a B-axis oil distributor is arranged on the inner side of the B-axis transmission shaft, a plurality of first oil circuits are provided in the B-axis oil distributor, a plurality of second oil circuits are provided in the B-axis transmission shaft, and a hydraulic pipe is connected to the front end of each second oil circuit; a C-axis oil distributor and a C-axis oil distributor sleeve are arranged on the inner side of the C-axis transmission shaft, a plurality of third oil circuits are provided in the C-axis oil distributor, a plurality of fourth oil circuits are provided in the C-axis oil distributor sleeve, a C-axis gland is fixed on the top of the C-axis oil distributor sleeve, a plurality of hydraulic function interfaces are provided on the C-axis gland, and each hydraulic function interface is connected to a fourth oil circuit. The five-axis cradle turntable hydraulic system has a compact structure and comprehensive functions, and can provide a plurality of fully functional hydraulic function interfaces, and the hydraulic function interfaces have strong versatility and applicability, and a high degree of modularization. Machine tool users can change the hydraulic function interfaces by themselves according to actual needs to meet the access needs of complex fixtures.

Description

Technical Field

[0001] The invention relates to the technical field of five-axis linkage machining, in particular to a five-axis cradle turntable hydraulic system. Background Art

[0002] Hydraulic clamps are a type of clamping system with a simple structure, high degree of automation, fixed clamping points, reliable clamping force, and fast clamping and releasing of workpieces. They can improve production efficiency and product quality and are widely used in automotive parts processing, mold processing and other industries.

[0003] The five-axis cradle turntable plays an important role in the processing of curved parts. It is a high-end functional component in CNC machine tools. The preferred structural layout is the cradle double-swing type. The five-axis cradle turntable is usually composed of four parts: the B-axis assembly, the swing arm, the worktable assembly (i.e., the C-axis assembly), and the support tailstock. The two ends of the swing arm are respectively connected to the B-axis assembly and the support tailstock, and the worktable assembly is installed on the swing arm. Common five-axis cradle turntable machine tools are generally equipped with hydraulic function interfaces on the worktable assembly, which makes it convenient for machine tool users to access the hydraulic fixture system in the future. The implementation structure of the hydraulic function interface varies from machine tool manufacturer to machine tool manufacturer, but the most common one is the drag chain structure. The advantage of this structure is the simple design, and the disadvantage is the large size. The versatility of the hydraulic function interface is poor and cannot meet the access requirements of complex fixtures. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a five-axis cradle turntable hydraulic system with compact structure, comprehensive functions, strong versatility and applicability, and high degree of modularization in view of the deficiencies in the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a five-axis cradle turntable hydraulic system, the five-axis cradle turntable includes a B-axis assembly, a swing arm, a C-axis assembly and a supporting tailstock, the B-axis assembly includes a horizontally arranged hollow B-axis transmission shaft and a B-axis housing, the C-axis assembly includes an uprightly arranged hollow C-axis transmission shaft and a C-axis housing, the two ends of the swing arm are respectively connected to the B-axis transmission shaft and the supporting tailstock, the middle part of the swing arm is fixed on the C-axis housing, and the top end of the C-axis transmission shaft is fixed with a working The inner side of the B-axis transmission shaft is provided with a B-axis oil separator, the B-axis oil separator is fixedly connected to the B-axis housing, the B-axis transmission shaft sleeve is arranged on the outer side of the B-axis oil separator, the outer cylindrical surface of the B-axis oil separator is clearance-matched with the inner cylindrical surface of the B-axis transmission shaft, the B-axis oil separator is provided with a plurality of first oil circuits, the B-axis transmission shaft is provided with a plurality of second oil circuits corresponding to the plurality of first oil circuits, each of the first oil circuits is connected to one of the second oil circuits, and each of the second oil circuits A hydraulic pipe is connected to the front end; a C-axis oil distributor and a C-axis oil distributor sleeve are arranged on the inner side of the C-axis transmission shaft, the C-axis oil distributor is fixedly connected to the C-axis housing, the C-axis oil distributor sleeve is sleeved on the outer side of the C-axis oil distributor, the outer cylindrical surface of the C-axis oil distributor and the inner cylindrical surface of the C-axis oil distributor sleeve are clearance-matched, the C-axis transmission shaft is sleeved on the outer side of the C-axis oil distributor sleeve, the C-axis oil distributor sleeve is fixed on the C-axis transmission shaft, and the C-axis oil distributor is provided with a plurality of the The hydraulic pipes of the C-axis oil separator sleeve correspond to multiple third oil circuits one by one, and multiple fourth oil circuits corresponding to the multiple third oil circuits are opened in the C-axis oil separator sleeve. The lower end of each of the third oil circuits is connected to one of the hydraulic pipes, and the upper end of each of the third oil circuits is connected to one of the fourth oil circuits. A C-axis pressure cover is fixed to the top of the C-axis oil separator sleeve, and a plurality of hydraulic function interfaces corresponding to the multiple fourth oil circuits are opened on the C-axis pressure cover, and each of the hydraulic function interfaces is connected to one of the fourth oil circuits.

[0006] The present invention provides a universal solution for the hydraulic system of the five-axis cradle turntable. The hydraulic system adopts a rotary seal structure, and all its oil circuits are arranged on the inner side of the B-axis drive shaft and the C-axis drive shaft. The structure is compact and does not require a redundant drag chain structure, which can ensure the compactness of the overall structure of the five-axis cradle turntable. At the same time, the hydraulic system is comprehensive and can provide multiple hydraulic function interfaces with full functions. The hydraulic function interface has strong versatility and applicability, and a high degree of modularization, which is conducive to reducing the manufacturing cost of the five-axis cradle turntable. Machine tool users can change the hydraulic function interface according to actual needs to meet the access needs of complex fixtures.

[0007] Preferably, each of the first oil circuits is opened along the axial direction of the B-axis oil distributor, and the multiple first oil circuits are arranged at intervals along the circumference of the B-axis oil distributor; each of the second oil circuits is opened along the axial direction of the B-axis transmission shaft, and the multiple second oil circuits are arranged at intervals along the circumference of the B-axis transmission shaft; each of the third oil circuits is opened along the axial direction of the C-axis oil distributor, and the multiple third oil circuits are arranged at intervals along the circumference of the C-axis oil distributor; each of the fourth oil circuits is opened along the axial direction of the C-axis oil distributor sleeve, and the multiple fourth oil circuits are arranged at intervals along the circumference of the C-axis oil distributor sleeve. The above oil circuit design is easy to process, ensuring that there is no mutual interference between the oil circuits, and at the same time facilitating the maximum saving and utilization of the five-axis cradle turntable space.

[0008] Preferably, a plurality of first annular grooves are arranged between the B-axis transmission shaft and the B-axis oil separator, the plurality of first annular grooves are arranged at intervals along the axial direction of the B-axis oil separator, each of the first annular grooves is arranged circumferentially around the outer cylindrical surface of the B-axis oil separator and the inner cylindrical surface of the B-axis transmission shaft, each of the first oil circuits is connected with a radially opened first sub-oil circuit, each of the second oil circuits is connected with a radially opened second sub-oil circuit, and each of the first annular grooves is respectively connected with the first sub-oil circuit and the second sub-oil circuit; a plurality of second annular grooves are arranged between the C-axis oil separator sleeve and the C-axis oil separator, the plurality of second annular grooves are arranged at intervals along the axial direction of the C-axis oil separator, each of the second annular grooves is arranged circumferentially around the outer cylindrical surface of the C-axis oil separator and the inner cylindrical surface of the C-axis oil separator sleeve, each of the third oil circuits is connected with a radially opened third sub-oil circuit, each of the fourth oil circuits is connected with a radially opened fourth sub-oil circuit, and each of the second annular grooves is respectively connected with the third sub-oil circuit and the fourth sub-oil circuit. Since the B-axis drive shaft is the rotating body of the B-axis assembly, the C-axis drive shaft and the C-axis oil separator sleeve are the rotating bodies of the C-axis assembly, and the B-axis oil separator and the C-axis oil separator are respectively one of the fixed parts of the B-axis assembly and the C-axis assembly, the design of multiple first annular grooves and multiple second annular grooves can ensure that no matter how the B-axis drive shaft and the C-axis drive shaft rotate, each first oil circuit always remains connected to the second oil circuit, and each third oil circuit always remains connected to the fourth oil circuit, thereby ensuring smooth connectivity of the hydraulic system.

[0009] Preferably, a plurality of first rotating seals are arranged between the B-axis transmission shaft and the B-axis oil separator, the plurality of first rotating seals are arranged at intervals along the axial direction of the B-axis oil separator, and one first rotating seal is arranged on both sides of each first annular groove; a plurality of second rotating seals are arranged between the C-axis oil separator sleeve and the C-axis oil separator, the plurality of second rotating seals are arranged at intervals along the axial direction of the C-axis oil separator, and one second rotating seal is arranged on both sides of each second annular groove. The plurality of first rotating seals and the plurality of second rotating seals can play a better sealing role, ensuring the sealing and isolation effect of each first annular groove and each second annular groove.

[0010] Preferably, a first connecting plate is fixed to the rear end of the B-axis oil distributor, and a plurality of first oil inlets corresponding to the multiple first oil circuits are provided on the first connecting plate, each of the first oil inlets is connected to one of the first oil circuits, and a first joint is installed on each of the first oil inlets; a B-axis pressure cover is installed on the B-axis transmission shaft, and a plurality of first through holes corresponding to the multiple second oil circuits are provided on the B-axis pressure cover, each of the first through holes is connected to the outlet of one of the second oil circuits, and a second joint is installed on each of the first through holes; a second connecting plate is fixed to the bottom end of the C-axis oil distributor, and a plurality of second oil inlets corresponding to the multiple third oil circuits are provided on the second connecting plate, each of the second oil inlets is connected to one of the third oil circuits, and a third joint is installed on each of the second oil inlets; and both ends of each of the hydraulic pipes are respectively connected to one of the second joints and one of the third joints.

[0011] Preferably, a first dust cover is fixedly connected to the rear side of the B-axis housing, and the first connecting plate is fixed on the first dust cover; a C-axis reading head flange is fixed to the bottom end of the C-axis housing, and the second connecting plate is fixed on the C-axis reading head flange.

[0012] Preferably, the B-axis oil separator is a hollow B-axis oil separator, and a hollow wiring shaft is arranged inside the B-axis oil separator, and the wiring shaft is fixed on the B-axis transmission shaft. The wiring shaft is used to facilitate the wiring inside the B-axis, making the B-axis structure more compact.

[0013] Preferably, a deep groove ball bearing is provided between the C-axis oil separator and the C-axis oil separator sleeve, the deep groove ball bearing is installed at the upper end of the C-axis oil separator, a second dust cover is provided above the C-axis oil separator, the second dust cover is located below the C-axis pressure cover, the outer cylindrical surface of the second dust cover is clearance-matched with the inner cylindrical surface of the C-axis oil separator sleeve, and an O-ring is provided between the second dust cover and the C-axis oil separator sleeve. The deep groove ball bearing supports the C-axis oil separator sleeve, ensuring that the C-axis oil separator sleeve rotates smoothly and reliably with the C-axis transmission shaft.

[0014] Preferably, a second through hole opened radially is provided in the middle of the workbench, and the C-axis pressure cover is installed in a sunken manner in the second through hole.

[0015] Preferably, the number of the first oil circuit, the second oil circuit, the third oil circuit and the fourth oil circuit are all four to eight.

[0016] Compared with the prior art, the present invention has the following advantages: the five-axis cradle turntable hydraulic system disclosed in the present invention adopts a rotary seal structure, and all its oil circuits are arranged on the inner side of the B-axis transmission shaft and the C-axis transmission shaft, and the structure is compact, and there is no need to arrange a redundant drag chain structure, which can ensure the compactness of the overall structure of the five-axis cradle turntable. At the same time, the hydraulic system is comprehensive in function and can provide multiple hydraulic function interfaces with full functions, and the hydraulic function interface has strong versatility and applicability, and a high degree of modularization, which is conducive to reducing the manufacturing cost of the five-axis cradle turntable. Machine tool users can change the hydraulic function interface according to actual needs to meet the access needs of complex fixtures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an appearance diagram of a five-axis cradle turntable used in a hydraulic system in an embodiment;

[0018] Figure 2 It is a schematic diagram of the structural connection of the B-axis assembly, the swing arm and the C-axis assembly of the five-axis cradle turntable applied to the hydraulic system in the embodiment;

[0019] Figure 3 for Figure 2 The enlarged image at point I in the middle;

[0020] Figure 4 for Figure 2 Enlarged view of II in the middle;

[0021] Figure 5 for Figure 2 Middle AA section view;

[0022] Figure 6 To correspond to Figure 1 Left view of . DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] The five-axis cradle turntable hydraulic system of embodiment 1 is applied to Figure 1 The five-axis cradle turntable shown, Figure 2 to Figure 6 As shown, the five-axis cradle turntable includes a B-axis assembly 1, a swing arm 2, a C-axis assembly 3 and a supporting tailstock 4. The B-axis assembly 1 includes a horizontally arranged hollow B-axis transmission shaft 11 and a B-axis housing 12. The C-axis assembly 3 includes an upright hollow C-axis transmission shaft 31 and a C-axis housing 32. The two ends of the swing arm 2 are respectively connected to the B-axis transmission shaft 11 and the supporting tailstock 4. The middle part of the swing arm 2 is fixed to the C-axis housing 32. The top end of the C-axis transmission shaft 31 is fixed with a workbench 33 by screws. The inner side of the B-axis transmission shaft 11 is provided with a B A-axis oil separator 13, B-axis oil separator 13 is fixedly connected to B-axis housing 12, B-axis transmission shaft 11 is sleeved on the outside of B-axis oil separator 13, the outer cylindrical surface of B-axis oil separator 13 and the inner cylindrical surface of B-axis transmission shaft 11 are clearance matched, eight first oil circuits 14 are opened in B-axis oil separator 13, eight second oil circuits 15 corresponding to the eight first oil circuits 14 are opened in B-axis transmission shaft 11, each first oil circuit 14 is connected to one second oil circuit 15, and a hydraulic pipe 5 is connected to the front end of each second oil circuit 15; C-axis The inner side of the transmission shaft 31 is provided with a C-axis oil distributor 34 and a C-axis oil distributor sleeve 35. The C-axis oil distributor 34 is fixedly connected to the C-axis housing 32. The C-axis oil distributor sleeve 35 is sleeved on the outer side of the C-axis oil distributor 34. The outer cylindrical surface of the C-axis oil distributor 34 and the inner cylindrical surface of the C-axis oil distributor sleeve 35 are clearance-matched. The C-axis transmission shaft 31 is sleeved on the outer side of the C-axis oil distributor sleeve 35. The C-axis oil distributor sleeve 35 is fixed to the C-axis transmission shaft 31 by screws. The C-axis oil distributor 34 is provided with eight hydraulic pipes 5 corresponding to each other. There are eight third oil circuits 36, and eight fourth oil circuits 37 corresponding to the eight third oil circuits 36 are opened in the C-axis oil separator sleeve 35. The lower end of each third oil circuit 36 ​​is connected to a hydraulic pipe 5, and the upper end of each third oil circuit 36 ​​is connected to one fourth oil circuit 37. A C-axis pressure cover 38 is fixed to the top of the C-axis oil separator sleeve 35 by screws. Eight hydraulic function interfaces 39 corresponding to the eight fourth oil circuits 37 are opened on the C-axis pressure cover 38, and each hydraulic function interface 39 is connected to one fourth oil circuit 37.

[0025] In Example 1, each first oil circuit 14 is opened along the axial direction of the B-axis oil separator 13, and the eight first oil circuits 14 are arranged at intervals along the circumference of the B-axis oil separator 13; each second oil circuit 15 is opened along the axial direction of the B-axis transmission shaft 11, and the eight second oil circuits 15 are arranged at intervals along the circumference of the B-axis transmission shaft 11; each third oil circuit 36 ​​is opened along the axial direction of the C-axis oil separator 34, and the eight third oil circuits 36 are arranged at intervals along the circumference of the C-axis oil separator 34; each fourth oil circuit 37 is opened along the axial direction of the C-axis oil separator sleeve 35, and the eight fourth oil circuits 37 are arranged at intervals along the circumference of the C-axis oil separator sleeve 35.

[0026] In Example 1, eight first annular grooves 6 are arranged between the B-axis transmission shaft 11 and the B-axis oil separator 13, and the eight first annular grooves 6 are arranged at intervals along the axial direction of the B-axis oil separator 13. Each first annular groove 6 is arranged circumferentially around the outer cylindrical surface of the B-axis oil separator 13 and the inner cylindrical surface of the B-axis transmission shaft 11. Each first oil circuit 14 is connected to a radially opened first sub-oil circuit 61, and each second oil circuit 15 is connected to a radially opened second sub-oil circuit 62. Each first annular groove 6 is respectively connected to the first sub-oil circuit 61 and the second sub-oil circuit 62; eight second annular grooves 7 are arranged between the C-axis oil separator sleeve 35 and the C-axis oil separator 34, and the eight second annular grooves 7 are arranged at intervals along the axial direction of the C-axis oil separator 34. Each second annular groove 7 surrounds the outer cylindrical surface of the C-axis oil separator 34 and the C-axis oil separator sleeve 35. The inner surface is circumferentially arranged, each third oil circuit 36 ​​is connected to a radially opened third sub-oil circuit 71, each fourth oil circuit 37 is connected to a radially opened fourth sub-oil circuit 72, and each second annular groove 7 is respectively connected to the third sub-oil circuit 71 and the fourth sub-oil circuit 72; nine first rotating seals 16 are arranged between the B-axis transmission shaft 11 and the B-axis oil separator 13, the nine first rotating seals 16 are arranged at intervals along the axial direction of the B-axis oil separator 13, and a first rotating seal 16 is arranged on both sides of each first annular groove 6; nine second rotating seals 30 are arranged between the C-axis oil separator sleeve 35 and the C-axis oil separator 34, the nine second rotating seals 30 are arranged at intervals along the axial direction of the C-axis oil separator 34, and a second rotating seal 30 is arranged on both sides of each second annular groove 7.

[0027] The five-axis cradle turntable hydraulic system of Example 2 is different from that of Example 1 in that, in Example 2, a first connecting plate 17 is fixed to the rear end of the B-axis oil distributor 13, a first dust cover 18 is fixedly connected to the rear side of the B-axis housing 12, the first connecting plate 17 is fixed to the first dust cover 18, and eight first oil inlets 19 corresponding to the eight first oil paths 14 are provided on the first connecting plate 17, each first oil inlet 19 is connected to one first oil path 14, and a first joint 10 is installed on each first oil inlet 19, such as Figure 6As shown, there are eight first joints 10 from a to h in total; a B-axis pressure cover 8 is installed on the B-axis transmission shaft 11, and eight first through holes 81 corresponding to the eight second oil circuits 15 are opened on the B-axis pressure cover 8, each of the first through holes 81 is connected to the outlet of the second oil circuit 15, and a second joint 82 is installed on each first through hole 81; a second connecting plate 91 is fixed to the bottom end of the C-axis oil distributor 34, and a C-axis reading head flange 9 is fixed to the bottom end of the C-axis housing 32 by screws, and the second connecting plate 91 is fixed to the C-axis reading head flange 9 by screws, and eight second oil inlets 92 corresponding to the eight third oil circuits 36 are opened on the second connecting plate 91, each of the second oil inlets 92 is connected to the third oil circuit 36, and a third joint 93 is installed on each second oil inlet 92, and the eight third joints 93 are as shown in FIG. Figure 5 As shown, there are eight third joints 93 a′ to h′ in total; both ends of each hydraulic pipe 5 are connected to a second joint 82 and a third joint 93 respectively.

[0028] The five-axis cradle turntable hydraulic system of Example 3 is different from that of Example 2 in that, in Example 3, the B-axis oil separator 13 is a hollow B-axis oil separator 13, and a hollow wiring shaft 51 is arranged on the inner side of the B-axis oil separator 13, and the wiring shaft 51 is fixed on the B-axis transmission shaft 11; a deep groove ball bearing 52 is arranged between the C-axis oil separator 34 and the C-axis oil separator sleeve 35, and the deep groove ball bearing 52 is installed at the upper end of the C-axis oil separator 34, and a second dust cover 53 is arranged above the C-axis oil separator 34, and the second dust cover 53 is located below the C-axis pressure cover 38, and the outer cylindrical surface of the second dust cover 53 is clearance-matched with the inner cylindrical surface of the C-axis oil separator sleeve 35, and an O-ring 54 is arranged between the second dust cover 53 and the C-axis oil separator sleeve 35; a second through hole 55 opened radially is arranged in the middle of the workbench 33, and the C-axis pressure cover 38 is sunken and installed in the second through hole 55.

[0029] The hydraulic working principle of the above five-axis cradle turntable hydraulic system is as follows: the eight first oil circuits 14 are respectively supplied with oil through external oil pipes (not shown in the figure), Figure 2 Only two hydraulic oil paths are shown (i.e. Figure 6The two passages corresponding to the first joint a and the first joint f in the figure), taking one of the passages as an example, when working, after the hydraulic oil enters the first oil circuit 14, it passes through the first sub-oil circuit 61, the first annular groove 6 and the second sub-oil circuit 62 in sequence to enter the second oil circuit 15. The first rotary seal 16 can ensure that the hydraulic oil does not leak during the rotation of the B-axis transmission shaft 11; after the hydraulic oil enters the second oil circuit 15, it enters the third oil circuit 36 ​​through the hydraulic pipe 5, passes through the third sub-oil circuit 71, the second annular groove 7, the fourth sub-oil circuit 72, the fourth oil circuit 37 in sequence, and finally enters the hydraulic function interface 39. The second rotary seal 30 can ensure that the hydraulic oil does not leak during the rotation of the C-axis transmission shaft 31. After the hydraulic function interface 39 is connected to the hydraulic clamp oil pipe (not shown in the figure), the hydraulic oil can enter the hydraulic clamp to realize the clamping and loosening functions.

[0030] During the workpiece processing, the swing arm 2 can drive the entire C-axis assembly 3 to rotate around the B-axis. While the swing arm 2 rotates, the hydraulic pipe 5 can rotate around the B-axis along with the swing arm 2. Therefore, the hydraulic pipe 5 is relatively stationary relative to the connection between it and the second oil circuit 15 and the third oil circuit 36, thereby avoiding the torsional damage problem of the hydraulic pipe 5.

[0031] The above-mentioned five-axis cradle turntable hydraulic system adopts a rotary seal structure to replace the traditional cumbersome drag chain structure. All its oil circuits are arranged inside the B-axis transmission shaft 11 and the C-axis transmission shaft 31. It has a compact structure and comprehensive functions. It can provide eight fully functional hydraulic function interfaces 39. The hydraulic function interfaces 39 have strong versatility and applicability, and a high degree of modularization, which is conducive to reducing the manufacturing cost of the five-axis cradle turntable. Machine tool users can change the hydraulic function interfaces 39 according to actual needs to meet the access needs of complex fixtures.

Claims

1. A five-axis cradle turntable hydraulic system, the five-axis cradle turntable comprises a B-axis assembly, a swing arm, a C-axis assembly and a supporting tailstock, the B-axis assembly comprises a horizontally arranged hollow B-axis transmission shaft and a B-axis housing, the C-axis assembly comprises an uprightly arranged hollow C-axis transmission shaft and a C-axis housing, the two ends of the swing arm are respectively connected to the B-axis transmission shaft and the supporting tailstock, the middle part of the swing arm is fixed on the C-axis housing, and the top end of the C-axis transmission shaft is fixed with a workbench, characterized in that: A B-axis oil distributor is arranged on the inner side of the B-axis transmission shaft, and the B-axis oil distributor is fixedly connected to the B-axis housing, and the B-axis transmission shaft is sleeved on the outer side of the B-axis oil distributor, and the outer cylindrical surface of the B-axis oil distributor is clearance-matched with the inner cylindrical surface of the B-axis transmission shaft, and multiple first oil circuits are opened in the B-axis oil distributor, and multiple second oil circuits corresponding to the multiple first oil circuits are opened in the B-axis transmission shaft, each of the first oil circuits is connected to one of the second oil circuits, and a hydraulic pipe is connected to the front end of each of the second oil circuits; a C-axis oil distributor and a C-axis oil distributor sleeve are arranged on the inner side of the C-axis transmission shaft, and the C-axis oil distributor is fixedly connected to the C-axis housing, and the C-axis oil distributor sleeve is sleeved on the outer side of the C-axis oil distributor, and the C-axis distributor The outer cylindrical surface of the oil distributor is in clearance fit with the inner cylindrical surface of the C-axis oil distributor sleeve, the C-axis transmission shaft sleeve is arranged on the outer side of the C-axis oil distributor sleeve, the C-axis oil distributor sleeve is fixed on the C-axis transmission shaft, the C-axis oil distributor is provided with a plurality of third oil circuits corresponding to the plurality of hydraulic pipes, the C-axis oil distributor sleeve is provided with a plurality of fourth oil circuits corresponding to the plurality of third oil circuits, the lower end of each third oil circuit is connected to a hydraulic pipe, the upper end of each third oil circuit is connected to one fourth oil circuit, the top end of the C-axis oil distributor sleeve is fixed with a C-axis pressure cover, the C-axis pressure cover is provided with a plurality of hydraulic function interfaces corresponding to the plurality of fourth oil circuits, each hydraulic function interface is connected to one fourth oil circuit; Each of the first oil circuits is opened along the axial direction of the B-axis oil distributor, and the multiple first oil circuits are arranged at intervals along the circumference of the B-axis oil distributor; each of the second oil circuits is opened along the axial direction of the B-axis transmission shaft, and the multiple second oil circuits are arranged at intervals along the circumference of the B-axis transmission shaft; each of the third oil circuits is opened along the axial direction of the C-axis oil distributor, and the multiple third oil circuits are arranged at intervals along the circumference of the C-axis oil distributor; each of the fourth oil circuits is opened along the axial direction of the C-axis oil distributor sleeve, and the multiple fourth oil circuits are arranged at intervals along the circumference of the C-axis oil distributor sleeve; A plurality of first annular grooves are arranged between the B-axis transmission shaft and the B-axis oil distributor, and the plurality of first annular grooves are arranged at intervals along the axial direction of the B-axis oil distributor, and each of the first annular grooves is arranged circumferentially around the outer cylindrical surface of the B-axis oil distributor and the inner cylindrical surface of the B-axis transmission shaft, and each of the first oil channels is connected to a radially opened first sub-oil channel, and each of the second oil channels is connected to a radially opened second sub-oil channel, and each of the first annular grooves is respectively connected to the first sub-oil channel and the second sub-oil channel; a plurality of second annular grooves are arranged between the C-axis oil distributor sleeve and the C-axis oil distributor, and the plurality of second annular grooves are arranged at intervals along the axial direction of the C-axis oil distributor, and each of the second annular grooves is arranged circumferentially around the outer cylindrical surface of the C-axis oil distributor and the inner cylindrical surface of the C-axis oil distributor sleeve, and each of the third oil channels is connected to a radially opened third sub-oil channel, and each of the fourth oil channels is connected to a radially opened fourth sub-oil channel, and each of the second annular grooves is respectively connected to the third sub-oil channel and the fourth sub-oil channel; A first connecting plate is fixed to the rear end of the B-axis oil distributor, and a plurality of first oil inlets corresponding to the multiple first oil circuits are provided on the first connecting plate, each of the first oil inlets is connected to one of the first oil circuits, and a first joint is installed on each of the first oil inlets; a B-axis pressure cover is installed on the B-axis transmission shaft, and a plurality of first through holes corresponding to the multiple second oil circuits are provided on the B-axis pressure cover, each of the first through holes is connected to the outlet of one of the second oil circuits, and a second joint is installed on each of the first through holes; a second connecting plate is fixed to the bottom end of the C-axis oil distributor, and a plurality of second oil inlets corresponding to the multiple third oil circuits are provided on the second connecting plate, each of the second oil inlets is connected to one of the third oil circuits, and a third joint is installed on each of the second oil inlets; both ends of each of the hydraulic pipes are connected to one of the second joints and one of the third joints, respectively.

2. A five-axis cradle turntable hydraulic system according to claim 1, characterized in that: A plurality of first rotating seals are arranged between the B-axis transmission shaft and the B-axis oil separator, and the plurality of first rotating seals are arranged at intervals along the axial direction of the B-axis oil separator, and a first rotating seal is arranged on both sides of each of the first annular grooves; a plurality of second rotating seals are arranged between the C-axis oil separator sleeve and the C-axis oil separator, and the plurality of second rotating seals are arranged at intervals along the axial direction of the C-axis oil separator, and a second rotating seal is arranged on both sides of each of the second annular grooves.

3. A five-axis cradle turntable hydraulic system according to claim 1, characterized in that: The rear side of the B-axis housing is fixedly connected with a first dust cover, and the first connecting plate is fixed on the first dust cover; the bottom end of the C-axis housing is fixed with a C-axis reading head flange, and the second connecting plate is fixed on the C-axis reading head flange.

4. The five-axis cradle turntable hydraulic system according to claim 1, characterized in that: The B-axis oil separator is a hollow B-axis oil separator, and a hollow wiring shaft is arranged on the inner side of the B-axis oil separator, and the wiring shaft is fixed on the B-axis transmission shaft.

5. The five-axis cradle turntable hydraulic system according to claim 1, characterized in that: A deep groove ball bearing is arranged between the C-axis oil separator and the C-axis oil separator sleeve, and the deep groove ball bearing is installed at the upper end of the C-axis oil separator. A second dust cover is arranged above the C-axis oil separator, and the second dust cover is located below the C-axis pressure cover. The outer cylindrical surface of the second dust cover is clearance-matched with the inner cylindrical surface of the C-axis oil separator sleeve, and an O-ring is arranged between the second dust cover and the C-axis oil separator sleeve.

6. The five-axis cradle turntable hydraulic system according to claim 1, characterized in that: A second through hole opened radially is arranged in the middle of the workbench, and the C-axis pressure cover is installed in the second through hole in a sunken manner.

7. The five-axis cradle turntable hydraulic system according to claim 1, characterized in that: The number of the first oil passage, the second oil passage, the third oil passage and the fourth oil passage are all four to eight.

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