A floating rotary joint suitable for a five-axis rotary table

Abstract

This utility model proposes a floating rotary joint suitable for a five-axis rotary table, comprising a housing, a rotating shaft assembly penetrating the housing, a rotating outer sleeve, and an axial floating limiting structure. The rotating shaft assembly consists of a coaxially nested encoder rotor mounting shaft and a rotating oil circuit shaft, which rotate synchronously. The rotating outer sleeve is fitted over the rotating oil circuit shaft. The axial floating limiting structure consists of a locking block located at the lower part of the rotating outer sleeve and a locking groove fixed to the top of the rotating oil circuit stator transition sleeve of the housing. This structure allows the rotating outer sleeve to float within a small range in the axial direction. Furthermore, the floating joint facilitates disassembly of the equipment and reduces maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of five-axis turntable technology, and more specifically, to a floating rotary joint suitable for five-axis turntables. Background Technology

[0002] As the manufacturing industry develops towards high speed, high precision, and multi-functionality, the five-axis rotary table, as a core component of CNC machine tools, requires a more convenient design for its installation structure.

[0003] Existing technologies, such as patent CN216829638U, describe a rotary oil circuit structure for a five-axis rotary table: its inclined shaft is connected to a rotating shaft, the rotating shaft is connected to a tailstock, and a rotary oil circuit is provided inside the inclined shaft and the rotating shaft. The oil circuit fixing plate is fixed on the five-axis rotary table for easy assembly and maintenance. However, the oil circuit sleeve and the rotating shaft are fixedly nested without floating compensation capability, and the oil circuit has only a single functional channel, making it impossible to recover leaked oil.

[0004] Therefore, there is an urgent need for a floating rotary joint suitable for five-axis rotary tables that can move axially. This joint can float axially while facilitating equipment installation, disassembly, and maintenance, and has multiple independent flow channels to discharge leaked oil. This will further improve equipment operating efficiency and reduce equipment maintenance costs. Utility Model Content

[0005] The purpose of this invention is to propose a floating rotary joint suitable for a five-axis turntable, comprising a housing, a rotating shaft assembly penetrating the housing, a rotating outer sleeve, and an axial floating limiting structure, thereby further improving equipment operating efficiency and reducing equipment maintenance costs.

[0006] A floating rotary joint suitable for a five-axis rotary table includes:

[0007] Casing 1;

[0008] The rotating shaft assembly that runs through the housing 1 includes a coaxially nested encoder rotor mounting shaft 2 and a rotating oil passage shaft 3, and the two rotate synchronously.

[0009] A rotating outer sleeve 4 is fitted onto the outside of the rotating oil passage shaft 3;

[0010] The axial floating limiting structure consists of a locking block 5 located at the lower part of the rotating outer sleeve 4 and a locking groove 601 fixed to the top of the rotating oil circuit stator transition sleeve 6 of the housing 1, which allows the rotating outer sleeve 4 to float axially and limits radial displacement.

[0011] Furthermore, in the axial floating limiting structure, the lower surface of the locking block 5 is an arc surface, which is in clearance fit with the bottom surface of the locking groove 601 of the rotating oil circuit stator transition sleeve 6.

[0012] Furthermore, the rotating outer sleeve 4 is connected to the rotating oil passage shaft 3 via the upper bearing 7 and the lower bearing 8, with the inner ring of the bearing fixed to the rotating oil passage shaft 3 and the outer ring of the bearing fixed to the rotating outer sleeve 4.

[0013] Furthermore, multiple independent media channels are formed between the rotating oil passage shaft 3 and the rotating outer sleeve 4. The media channels include at least three independent flow channels 9 that extend axially through the center. The middle flow channel 9 is used for oil transmission, and the top flow channel 9 and the bottom flow channel 9 are used for the discharge of leaked oil.

[0014] Furthermore, a radial sealing ring 10 is provided between adjacent flow channels 9.

[0015] Furthermore, the rotating outer jacket 4 is provided with multiple fourth pipes 11, with the input end of each pipe connected to an external connector and the output end connected to the input end of the corresponding flow channel 9.

[0016] Furthermore, the rotating oil circuit shaft 3 is provided with multiple first pipelines 13, and the input end of each pipeline is connected to the output end of the corresponding flow channel 9.

[0017] Furthermore, the rotating shaft assembly includes a C-axis rotating shaft 14 coaxially connected to the rotating oil circuit shaft 3. The C-axis rotating shaft 14 is provided with multiple second pipes 15 that are connected to the first pipe 13, and an axial sealing ring 16 is provided at the connection point.

[0018] Furthermore, the nested portion of the encoder rotor mounting shaft 2 and the rotating oil circuit shaft 3 is provided with a radial deformation isolation gap 17.

[0019] Furthermore, the upper end of the encoder rotor mounting shaft 2 is connected to the C-axis rotating shaft 14, and the lower end is connected to the encoder assembly 18. The outer end of the C-axis rotating shaft 14 is connected to the worktable 19. The worktable 19 is provided with multiple third pipes 20 that are connected to the second pipe 15. The third pipes 20 pass out from the upper end face or outer peripheral face of the worktable 19, and an axial sealing ring 16 is provided at the connection point.

[0020] The beneficial effects of this utility model are as follows: A floating rotary joint suitable for a five-axis turntable achieves isolated transmission of oil and leaking oil through at least three independent flow channels 9 located between the rotating oil circuit shaft 3 and the rotating outer sleeve 4. The middle flow channel 9 is the working oil circuit, and the top and bottom flow channels 9 are used to discharge leaking oil, preventing leaking oil from contaminating the inside of the turntable. The radial displacement of the rotating outer sleeve 4 is limited by the cooperation of the locking block 5 and the locking groove 601, ensuring the coaxiality between the rotating oil circuit shaft 3, the rotating outer sleeve 4 and the stator transition sleeve 6, and facilitating installation and disassembly. The rotating outer sleeve 4 is connected to the rotating oil circuit shaft 3 through the upper bearing 7 and the lower bearing 8. The inner and outer rings of the bearings are fixed to the shaft 3 and the outer sleeve 4 respectively. This double bearing support structure provides rigid radial support and smooth rotation guidance for the rotating assembly, ensuring the stability of the rotational motion. The isolation gap 17 physically isolates the direct transmission of radial micro-deformation of the rotating oil circuit shaft 3 caused by pressure changes to the encoder rotor mounting shaft 2, protecting the encoder assembly 18 from mechanical stress interference. This further improves the operating efficiency of the equipment and reduces the equipment maintenance cost. Attached Figure Description

[0021] Figure 1 This is a cross-sectional schematic diagram of a floating rotary joint suitable for a five-axis rotary table according to the present invention.

[0022] Figure 2 This invention relates to a floating rotary joint suitable for a five-axis rotary table. Figure 1 Enlarged view of part A.

[0023] Figure 3 This is a partial structural diagram of a floating rotary joint suitable for a five-axis rotary table according to the present invention.

[0024] Explanation of main component symbols

[0025] 1. Housing; 2. Encoder rotor mounting shaft; 3. Rotary oil circuit shaft; 4. Rotary outer sleeve; 5. Clamping block; 6. Rotary oil circuit stator transition sleeve; 7. Slot 601; 8. Upper bearing; 9. Flow channel; 10. Radial sealing ring; 11. Fourth pipeline; 13. First pipeline; 14. C-axis shaft; 15. Second pipeline; 16. Axial sealing ring; 17. Isolation gap; 18. Encoder assembly; 19. Worktable; 20. Third pipeline.

[0026] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0027] The following embodiments are described to aid in understanding this application. These embodiments are not, and should not be, construed in any way as limiting the scope of protection of this application.

[0028] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as individual functional units (which may include subunits), but those skilled in the art will recognize that various components or portions thereof may be divided into individual components or may be integrated together (including integrated within a single system or component).

[0029] Furthermore, the connection between components or systems is not intended to be limited to a direct connection; on the contrary, data between these components may be modified, reformatted, or otherwise altered by intermediate components. Additionally, other or fewer connections may be used. It should also be noted that the terms "connection," "link," or "input" should be understood to include direct connections, indirect connections via one or more intermediate devices, and wireless connections. Example 1:

[0030] like Figure 1 The image shown is a cross-sectional schematic diagram of a floating rotary joint suitable for a five-axis rotary table according to this utility model; as shown... Figure 2 As shown, this utility model discloses a floating rotary joint suitable for a five-axis rotary table. Figure 1 Enlarged view of part A; as shown Figure 3 The figure shown is a partial structural diagram of a floating rotary joint suitable for a five-axis rotary table according to this utility model.

[0031] A floating rotary joint suitable for a five-axis rotary table includes a housing 1, a rotating shaft assembly penetrating the housing, a rotating outer sleeve 4, and an axial floating limiting structure. The rotating shaft assembly consists of a coaxially nested encoder rotor mounting shaft 2 and a rotating oil circuit shaft 3, which rotate synchronously. The rotating outer sleeve 4 is fitted over the rotating oil circuit shaft 3. The axial floating limiting structure consists of a locking block 5 located at the lower part of the rotating outer sleeve 4 and a locking groove 601 fixed to the top of the rotating oil circuit stator transition sleeve 6 of the housing 1. This structure allows the rotating outer sleeve to float within a small range in the axial direction. Furthermore, the floating joint facilitates disassembly of the equipment and reduces maintenance costs.

[0032] In the axial floating limiting structure, the lower surface of the locking block 5 is an arc surface, which is clearance-fitted with the bottom surface of the slot 601 of the rotating air passage stator transition sleeve 6; the arc surface can reduce floating friction resistance, ensure smooth axial movement and extend the service life of the slot 601. The rotating outer sleeve 4 is connected to the rotating oil passage shaft 3 through the upper bearing 7 and the lower bearing 8, the inner ring of the bearing is fixed to the rotating oil passage shaft 3, and the outer ring of the bearing is fixed to the rotating outer sleeve 4.

[0033] Multiple independent media channels are formed between the rotating oil circuit shaft 3 and the rotating outer sleeve 4. Each media channel includes at least three axially penetrating independent flow channels 9. The middle flow channel 9 is used for oil transmission, while the top and bottom flow channels 9 are used for draining leaked oil. These channels actively drain leaked oil to prevent contamination of the turntable's interior. Radial sealing rings 10 are provided between adjacent flow channels 9, effectively providing rotary sealing for the oil in each channel and ensuring stable pressure in each oil circuit.

[0034] The rotating outer sleeve 4 is provided with multiple fourth pipes 11, each pipe's input end connected to an external connector, and its output end connected to the input end of the corresponding flow channel 9; the rotating oil circuit shaft 3 is provided with multiple first pipes 13, each pipe's input end connected to the output end of the corresponding flow channel 9; the rotating shaft assembly includes a C-axis shaft 14 coaxially connected to the rotating oil circuit shaft 3, the C-axis shaft 14 being provided with multiple second pipes 15 that connect to the first pipes 13, and an axial sealing ring 16 being provided at the connection point; the modular input interface enables quick disassembly and maintenance, improving work efficiency.

[0035] The encoder rotor mounting shaft 2 and the rotating oil circuit shaft 3 are nested at a radial deformation isolation gap 17 to prevent deformation of the rotating oil circuit shaft 3 from affecting the rotational accuracy of the encoder rotor mounting shaft 2. The upper end of the encoder rotor mounting shaft 2 is connected to the C-axis shaft 14, and the lower end is connected to the encoder assembly 18. The outer end of the C-axis shaft 14 is connected to the worktable 19. The worktable 19 is provided with multiple third pipes 20 that connect to the second pipe 15. The third pipes 20 exit from the upper end face or outer peripheral face of the worktable 19, and an axial sealing ring 16 is provided at the connection point.

[0036] The beneficial effects of this utility model are as follows: A floating rotary joint suitable for a five-axis turntable achieves isolated transmission of oil and leaking oil through at least three independent flow channels 9 located between the rotating oil circuit shaft 3 and the rotating outer sleeve 4. The middle flow channel 9 is the working oil circuit, and the top and bottom flow channels 9 are used to discharge leaking oil, preventing leaking oil from contaminating the inside of the turntable. The radial displacement of the rotating outer sleeve 4 is limited by the cooperation of the locking block 5 and the locking groove 601, ensuring the coaxiality between the rotating oil circuit shaft 3, the rotating outer sleeve 4 and the stator transition sleeve 6, and facilitating installation and disassembly. The rotating outer sleeve 4 is connected to the rotating oil circuit shaft 3 through the upper bearing 7 and the lower bearing 8. The inner and outer rings of the bearings are fixed to the shaft 3 and the outer sleeve 4 respectively. This double bearing support structure provides rigid radial support and smooth rotation guidance for the rotating assembly, ensuring the stability of the rotational motion. The isolation gap 17 physically isolates the direct transmission of radial micro-deformation of the rotating oil circuit shaft 3 caused by pressure changes to the encoder rotor mounting shaft 2, protecting the encoder assembly 18 from mechanical stress interference. This further improves the operating efficiency of the equipment and reduces the equipment maintenance cost.

[0037] Although this application discloses several aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Various modifications and improvements can be made without departing from the concept of this application, and these all fall within the scope of protection of this application. The various aspects and embodiments disclosed in this application are for illustrative purposes only and are not intended to limit this application. The actual scope of protection of this application is determined by the claims.

Claims

1. A floating rotary joint suitable for use in a five-axis rotary table, characterized by: include: Shell (1); A rotating shaft assembly penetrating the housing (1) includes a coaxially nested encoder rotor mounting shaft (2) and a rotating oil passage shaft (3), which rotate synchronously. A rotating outer sleeve (4) fitted outside the rotating oil passage shaft (3); The axial floating limiting structure consists of a locking block (5) located at the lower part of the rotating outer sleeve (4) and a locking groove (601) on the top of the rotating oil circuit stator transition sleeve (6) fixed to the housing (1), which allows the rotating outer sleeve (4) to float axially and limits radial displacement.

2. A floating rotary joint suitable for use in a five-axis rotary table as claimed in claim 1, characterized in that: In the axial floating limiting structure, the lower surface of the card block (5) is an arc surface, which is in clearance fit with the bottom surface of the slot (601) of the rotating air passage stator transition sleeve 6.

3. A floating rotary joint suitable for use in a five-axis rotary table as claimed in claim 1, characterized in that: The rotating outer sleeve (4) is connected to the rotating oil circuit shaft (3) through the upper bearing (7) and the lower bearing (8). The inner ring of the bearing is fixed to the rotating oil circuit shaft (3), and the outer ring of the bearing is fixed to the rotating outer sleeve (4).

4. A floating rotary union suitable for use in a five-axis rotary table as defined in claim 1, characterized in that: Multiple independent media channels are formed between the rotating oil passage shaft (3) and the rotating outer sleeve (4). The media channels include at least three independent flow channels (9) that run through the center through the center. The middle flow channel (9) is used for oil transmission, and the top flow channel (9) and bottom flow channel (9) are used for the discharge of leaked oil.

5. A floating rotary joint suitable for use in a five-axis rotary table as claimed in claim 4, characterised in that: A radial sealing ring (10) is provided between adjacent flow channels (9).

6. A floating rotary union suitable for use in a five-axis rotary table as defined in claim 1, characterized in that: The rotating jacket (4) is provided with multiple fourth pipes (11), with the input end of each pipe connected to an external connector and the output end connected to the input end of the corresponding flow channel (9).

7. A floating rotary union suitable for use in a five-axis rotary table as defined in claim 1, characterized in that: The rotating oil circuit shaft (3) is provided with multiple first pipelines (13), and the input end of each pipeline is connected to the output end of the corresponding flow channel (9).

8. A floating rotary joint suitable for a five-axis rotary table as described in claim 7, characterized in that: The rotating shaft assembly includes a C-axis rotating shaft (14) coaxially connected to the rotating oil circuit shaft (3). The C-axis rotating shaft (14) is provided with multiple second pipelines (15) that are connected to the first pipeline (13), and an axial sealing ring (16) is provided at the connection point.

9. A floating rotary union suitable for use in a five-axis rotary table as defined in claim 1, characterized in that: The encoder rotor mounting shaft (2) and the rotating oil circuit shaft (3) are provided with a radial deformation isolation gap (17).

10. A floating rotary union suitable for use in a five-axis rotary table as defined in claim 1, characterized in that: The encoder rotor mounting shaft (2) is connected to the C-axis rotating shaft (14) at the upper end and to the encoder assembly (18) at the lower end. The outer end of the C-axis rotating shaft (14) is connected to the worktable (19). The worktable (19) is provided with multiple third pipes (20) that are connected to the second pipe (15). The third pipes (20) are exited from the upper end face or outer peripheral face of the worktable (19), and an axial sealing ring (16) is provided at the connection point.

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