Rotary table with cooling circuit

Abstract

A rotary table with a cooling circuit is provided. [Solution] The turntable is formed along the axial direction and has a plurality of flow path inlet portions, a plurality of first flow path portions that communicate with each of the flow path inlet portions and enclose the axial direction, a flow path outlet portion that communicates with each of the first flow path portions, and a first circulation portion parallel to the axial direction, the ends of the first circulation portion being a central axis which is the first circulation inlet and the first circulation outlet, a second flow path portion that is locked to the central axis and communicates with the flow path outlet portion, a cooling chamber that communicates with the second flow path portion, and a second circulation portion that communicates between the cooling chamber and the first circulation inlet.

Description

Technical Field

[0001] The present invention relates to a rotary table for a metal processing apparatus, and more particularly to a rotary table having a cooling circuit.

Background Art

[0002] A rotary table used in a conventional metal processing apparatus (for example, a milling machine or a lathe) is usually designed with a central oil discharge function to supply a medium to a clamping jig in order to meet the process requirements in various industries and the requirements for high-speed continuous operation.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a situation of continuous high-speed operation, heat is generated due to friction between the central shaft and the seal member, the temperature rises, which affects the normal operation of the internal mechanisms (for example, bearings and braking devices), and there is a possibility that the members may stop moving or fail.

[0005] For this reason, the industry has already researched and developed various cooling designs for rotary tables. Conventional patent documents, for example, Patent Document 1, describes "a rotary table device having a cooling structure, and a rotary bearing having a cooling structure," but the aforementioned prior patent uses a rotary joint transport medium, which increases the number of components and occupies the central oil discharge function of the table. In addition, the blower blade and radiator used in the aforementioned prior patent are designed to occupy a large space, and the cooling effect is low because the thermal conductivity of the air cooling medium is low.

[0006] Furthermore, while Patent Document 2 describes a "rotary splitting device for working machinery," it was designed considering only the function of a distributor and did not take into account measures to address the heat generation problem during high-speed operation. Therefore, this technology could only be applied to intermittent and low-speed motion.

[0007] Therefore, the inventors believed that the above-mentioned shortcomings could be improved, and after diligent research, arrived at the present invention, which effectively improves the above-mentioned problems through a rational design.

[0008] This invention has been made in view of these circumstances, and its objective is to provide a rotary table having a cooling circuit that can solve one of the above-mentioned problems. [Means for solving the problem]

[0009] To solve the above problems, a rotary table having a cooling circuit according to one aspect of the present invention is formed along the axial direction and has a plurality of flow path inlet portions, a plurality of first flow path portions that communicate with each of the flow path inlet portions and enclose the axial direction, a flow path outlet portion that communicates with each of the first flow path portions, and a first circulation portion parallel to the axial direction, wherein both ends of the first circulation portion are a central axis which is the first circulation inlet and the first circulation outlet, a second flow path portion that is locked to the central axis and communicates with the flow path outlet portion, a cooling chamber that communicates with the second flow path portion, and a second circulation portion that communicates between the cooling chamber and the first circulation inlet.

[0010] Furthermore, since the present invention designs a cooling circuit for the central axis and turntable kit that are originally provided in the rotary table, no additional heat dissipation components are required, and the space occupied by the rotary table is increased.

[0011] Furthermore, in a rotary table having a cooling circuit according to the present invention, the central axis further has a central axis upper surface and a central axis ring side surface, each of the flow path inlet portions has a flow path inlet located on the central axis ring side surface, the flow path outlet portion is radial and has a plurality of outlet flow path portions that are each connected to each of the first flow path portions, and a confluence portion that is connected to each of the outlet flow path portions, the confluence portion is located on the central axis upper surface and has a flow path outlet that is connected to the second flow path portion.

[0012] Furthermore, in a rotary table having a cooling circuit according to the present invention, the cooling chamber is annular or spiral in shape and has a first chamber opening that is in communication with the second flow path portion, and a second chamber opening that is spaced apart from the first chamber opening and is in communication with the second circulation portion.

[0013] Furthermore, in a rotary table having a cooling circuit according to the present invention, the central axis is pivotally mounted on a shunt seat, and a plurality of sealing members are installed between the central axis and the shunt seat along the axial direction. Each of the sealing members is located within the length range of each of the first flow path portions.

[0014] Furthermore, in a rotary table having a cooling circuit according to the present invention, the shunt seat is fitted onto the rotor, the rotor is fitted onto the stator, and a braking device is installed between the rotor and the stator. The braking device is contained within the length range of each of the first flow path portions, the turntable is pivotally mounted on a bearing holder by bearings, and the bearings correspond to the cooling chambers of the turntable.

[0015] Furthermore, in the rotary table having the cooling circuit according to the present invention, these first flow path portions are enclosed at equal intervals in the axial direction.

[0016] Furthermore, in order to achieve the above objective, a rotary table having a cooling circuit, which is another aspect of the present invention, comprises a turntable having a central axis formed along the axial direction and having a first flow channel portion, a plurality of first cooling chambers communicating with the first flow channel portion, and a first circulation portion parallel to the axial direction, the ends of the first flow channel portion being a flow channel inlet and a flow channel outlet, the ends of the first circulation portion being a first circulation inlet and a first circulation outlet, a second flow channel portion locked to the central axis and communicating with the flow channel outlet, a second cooling chamber communicating with the second flow channel portion, and a second circulation portion communicating between the second cooling chamber and the first circulation inlet.

[0017] Furthermore, in the rotary table having a cooling circuit according to the present invention, the central axis comprises a central axis body and a ring kit covering the central axis body.

[0018] Furthermore, in a rotary table having a cooling circuit according to the present invention, each of the first cooling chambers is installed between the central shaft body and the ring kit.

[0019] Furthermore, in a rotary table having a cooling circuit according to the present invention, the second cooling chamber is annular or helical in shape and has a first chamber opening that is in communication with the second flow path portion, and a second chamber opening that is spaced apart from the first chamber opening and is in communication with the second circulation portion.

[0020] Furthermore, in the rotary table having a cooling circuit according to the present invention, the central axis is pivotally mounted on a shunt seat, and a plurality of sealing members are installed between the central axis and the shunt seat along the axial direction. Each of the sealing members is located next to each of the first cooling chambers.

[0021] Furthermore, in a rotary table having a cooling circuit according to the present invention, the turntable is pivotally mounted to a bearing holder by bearings, and the bearings correspond to the second cooling chamber of the turntable. [Effects of the Invention]

[0022] According to one aspect of the present invention, a plurality of first flow channel sections are installed around the central axis, enclosing the axial direction, and are designed to form a single effective cooling circuit in combination with the cooling chamber of the turntable and the flow channel sections between them. As a result, the sealing member and braking device of the rotary table are located within the length range of the first flow channel sections, and the bearings of the rotary table correspond to the cooling chambers. This design effectively removes the heat generated by components such as the sealing member, braking device, and bearings when the rotary table operates at high speed, suppressing the temperature rise of the entire rotary table and maintaining the normal operation of the rotary table. At the same time, it maintains stable performance even when operated under high load for a long period of time, increasing the operating efficiency of the rotary table and extending its service life. Also, according to another aspect of the present invention, a first flow path portion is provided on the central axis and a plurality of first cooling chamber structures communicating with the first flow path portion are installed. Since it is designed to form an effective cooling circuit in combination with the second cooling chamber of the turntable and the flow path portion therebetween, each of the seal members of the rotating table is located beside each of the first cooling chambers, and the bearing of the rotating table corresponds to the second cooling chamber. Such a design can effectively remove the heat generated by members such as seal members and bearings when the rotating table operates at high speed, suppress the temperature rise of the entire rotating table, maintain the normal operation of the rotating table, and at the same time maintain stable performance even during long-term operation under high load, improve the operating efficiency of the rotating table, and extend the service life.

[0023] From the descriptions in the following specification and drawings, at least the following matters will become clear.

Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view showing a rotating table having a cooling circuit according to a first embodiment of the present invention. [Figure 2] It is a cross-sectional view showing a rotating table having a cooling circuit according to a first embodiment of the present invention. [Figure 3A] It is a perspective view showing a rotating table having a cooling circuit according to a first embodiment of the present invention, showing the inclined state of the central axis. [Figure 3B] It is a cross-sectional view taken along line 3B-3B of FIG. 3A. [Figure 3C] It is a cross-sectional view taken along line 3C-3C of FIG. 3A. [Figure 3D] It is a cross-sectional view taken along line 3D-3D of FIG. 3A. [Figure 4] It is a partial cross-sectional view showing a rotating table having a cooling circuit according to a first embodiment of the present invention. [Figure 5] It is a partial cross-sectional view showing a rotating table having a cooling circuit according to a second embodiment of the present invention. [Figure 6]This is a cross-sectional view showing a rotary table having a cooling circuit according to a third embodiment of the present invention. [Figure 7A] This is an exploded view showing a rotary table having a cooling circuit according to a third embodiment of the present invention, showing the disassembled state of the central axis. [Figure 7B] This is an exploded view showing a rotary table having a cooling circuit according to a third embodiment of the present invention, showing a cross-sectional view of the central axis. [Figure 8] This is a partial cross-sectional view showing a rotary table having a cooling circuit according to a third embodiment of the present invention. [Modes for carrying out the invention]

[0025] The present invention will be described below through embodiments of the invention, but these embodiments are not intended to limit the invention as defined in the claims. Furthermore, not all combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0026] (First embodiment) First, a rotary table 100 having a cooling circuit according to an embodiment of the present invention will be described in detail with reference to Figures 1 to 4. The rotary table 100 having a cooling circuit according to the present invention mainly comprises a central shaft 10 and a turntable 20. The configuration of each component will be described below.

[0027] The central axis 10 is formed along the axial direction Y and has a plurality of flow path inlet portions 11, a plurality of first flow path portions 12 that are in communication with each of the flow path inlet portions 11 and surround the axial direction Y, spaced at equal intervals, a flow path outlet portion 13 that is in communication with each of the first flow path portions 12, and a first circulation portion 14 that is parallel to the axial direction Y, with the ends of the first circulation portion 14 being a first circulation inlet 141 and a first circulation outlet 142, respectively. In this embodiment, the central axis 10 further has a central axis upper surface 101 and a central axis ring side surface 102, and each of the flow path inlet portions 11 is formed along the radial X and has a flow path inlet 111 located on the central axis ring side surface 102. The flow path outlet portion 13 is aligned with the radial X and has a radial shape, and has a plurality of outlet flow path portions 131 that are each connected to each of the first flow path portions 12, and a confluence portion 132 that is aligned with the axial direction Y and is connected to each of the outlet flow path portions 131, and the confluence portion 132 has a flow path outlet 133 located on the upper surface 101 of the central axis. The central axis 10 is pivotally mounted on a plurality of shunt seats 30 that are installed along the axial direction Y, and a plurality of sealing members 40 are installed between the central axis 10 and the shunt seats 30 along the axial direction Y, and each of the sealing members 40 is located within the length range of each of the first flow path portions 12. Each of the shunt seats 30 is fitted onto the rotor 50, the rotor 50 is fitted onto the stator 60, and a braking device 70 is installed between the rotor 50 and the stator 60, and the braking device 70 is located within the length range of each of the first flow path portions 12. In other words, the length range of each of the first flow path portions 12 along the axial direction Y covers each of the sealing members 40 and the braking device 70.

[0028] The turntable 20 has a second flow path portion 21 that is locked to the central axis 10 and communicates with the flow path outlet 133, a cooling chamber 22 that communicates with the second flow path portion 21, and a second circulation portion 23 that communicates between the cooling chamber 22 and the first circulation inlet 141. In this embodiment, one end of the second flow path portion 21 is connected to the flow path outlet 133 on the upper surface 101 of the central axis, and the other end of the second flow path portion 21 communicates with the cooling chamber 22. The cooling chamber 22 is annular in shape and has a first chamber opening 221 that communicates with the second flow path portion 21, and a second chamber opening 222 that is spaced apart from the first chamber opening 221 and communicates with the second circulation portion 23. The path through which the coolant flows in from the first chamber opening 221 to the cooling chamber 22 and out from the second chamber opening 222 is the longest possible, achieving the best cooling effect. Furthermore, the turntable 20 is pivotally mounted to the bearing holder 90 by a bearing 80, and the bearing 80 corresponds to the cooling chamber 22 of the turntable 20.

[0029] The above describes the form of each main component according to the first embodiment of the present invention. The operating method and effects of the present invention will now be described.

[0030] In this case, as shown in Figure 4, it should be noted that the cooling circuit according to the present invention is formed by the flow path inlet portion 11 of the central shaft 10, each first flow path portion 12 of the central shaft 10, the flow path outlet portion 13 of the central shaft 10, the second flow path portion 21 of the turntable 20, the cooling chamber 22 of the turntable 20, the second circulation portion 23 of the turntable 20, and the first circulation portion 14 of the central shaft 10.

[0031] As shown in Figures 2 and 4, the flow path of the coolant (indicated by arrows) in the cooling circuit is as follows: First, the coolant flows into the central axis 10 along the radial X from the flow inlet 111 of each flow inlet portion 11, flows along the axial Y in each first flow portion 12, then flows into each outlet flow portion 131 which are radially arranged along the radial X, merges, flows along the axial Y or radial X from the merging portion 132, flows out to the central axis 10 from the flow outlet 133, and flows into the turntable 20 from the second flow portion 21. After entering the turntable 20, the coolant flows into the cooling chamber 22 of the turntable 20 along the radial X, flows in an annular manner within the cooling chamber 22, then flows out from the second circulation portion 23 of the turntable 20, circulates through the first circulation portion 14 and returns to the central axis 10. Finally, the coolant flows out from the first circulation outlet 142 of the central shaft 10, completing the overall circulation process of the coolant.

[0032] As can be seen from this, the present invention is designed so that a plurality of first flow channel sections 12 structures are installed on the central axis 10, enclosing the axial direction Y, and are combined with the cooling chamber 22 of the turntable 20 and the flow channel sections between them to form one effective cooling circuit. As a result, the sealing member 40 and braking device 70 of the rotary table 100 are located within the length range of the first flow channel sections 12, and the bearing 80 of the rotary table 100 corresponds to the cooling chamber 22. This design effectively removes the heat generated by components such as the sealing member 40, braking device 70, and bearing 80 when the rotary table 100 is operating at high speed, suppressing the temperature rise of the entire rotary table 100 and maintaining the normal operation of the rotary table 100. At the same time, it maintains stable performance even when operated under high load for a long period of time, increasing the operating efficiency of the rotary table 100 and extending its service life.

[0033] (Second example) A rotary table 100 (see Figure 5) having a cooling circuit according to a second embodiment of the present invention is similarly composed of a central axis 10 and a turntable 20. The second embodiment differs from the first embodiment in that the cooling chamber 22 of the turntable 20 is spiral in shape and has a first chamber opening 221 located at the uppermost end of the cooling chamber 22, which is in communication with the second flow path portion 21, and a second chamber opening 222 located at the lowermost end of the cooling chamber 22, which is spaced apart from the first chamber opening 221 and in communication with the second circulation portion 23. Because the cooling chamber 22 is designed in a spiral shape, when the cooling liquid flows into the cooling chamber 22, it flows along the spiral path, has a long flow path, effectively removes heat, suppresses the temperature rise of the entire rotary table 100, and further maintains the normal operation of the rotary table 100.

[0034] (Third embodiment) The configuration of the third embodiment of the present invention is shown in Figures 6 to 8. The rotary table 100 having a cooling circuit according to the present invention is similarly composed of a central axis 10 and a turntable 20. The configuration of each component will be described below.

[0035] The central axis 10 is formed along the axial direction Y and has a first flow path portion 12, a plurality of first cooling chambers 15 located in the path of the first flow path portion 12 and communicating with the first flow path portion 12, and a first circulation portion 14 parallel to the axial direction Y. The ends of the first flow path portion 12 are a flow path inlet 121 and a flow path outlet 122, respectively, and the ends of the first circulation portion 14 are a first circulation inlet 141 and a first circulation outlet 142, respectively, and the first circulation portion 14 is designed to be offset from the axis of the central axis 10 or to be installed along the axis of the central axis 10. In this embodiment, the central shaft 10 comprises a central shaft body 103 and a ring kit 104 covering the central shaft body 103. Each of the first cooling chambers 15 is installed between the central shaft body 103 and the ring kit 104. The flow path inlet 121 of the first flow path portion 12 is installed on the side surface 102 of the central shaft ring, and the flow path outlet 122 is installed on the upper surface 101 of the central shaft. The central shaft 10 is pivotally mounted on a plurality of shunt seats 30 installed along the axial direction Y. A plurality of sealing members 40 are installed between the central shaft 10 and the shunt seats 30 along the axial direction Y, and each of the sealing members 40 is located next to each of the first cooling chambers 15.

[0036] The turntable 20 includes a second flow path portion 21 locked to the central axis 10 and communicating with the flow path outlet 122, a second cooling chamber 24 communicating with the second flow path portion 21, and a second circulation portion 23 communicating between the second cooling chamber 24 and the first circulation inlet 141. In this embodiment, the second cooling chamber 24 is annular in shape, but the present invention is not limited thereto. The second cooling chamber 24 may also be helical (see second embodiment), and the second cooling chamber 24 has a first chamber opening 241 communicating with the second flow path portion 21, and a second chamber opening 242 spaced apart from the first chamber opening 241 and communicating with the second circulation portion 23, and the path through which the coolant flows from the first chamber opening 241 to the second cooling chamber 24 and out through the second chamber opening 242 is the longest possible, achieving the best cooling effect. Furthermore, the turntable 20 is pivotally mounted to the bearing holder 90 by a bearing 80, and the bearing 80 corresponds to the second cooling chamber 24 of the turntable 20.

[0037] The above describes the form of each main component according to the third embodiment of the present invention. The operating method and effects of the present invention will now be described.

[0038] In this case, as shown in Figure 8, it should be noted that the cooling circuit according to the present invention is formed by the first flow path portion 12 of the central axis 10, the first cooling chambers 15 of the central axis 10, the second flow path portion 21 of the turntable 20, the second cooling chamber 24 of the turntable 20, the second circulation portion 23 of the turntable 20, and the first circulation portion 14 of the central axis 10.

[0039] As shown in Figures 6 and 8, the flow path of the coolant (indicated by arrows) in the cooling circuit is such that the coolant first flows into the central axis 10 from the flow inlet 121 of the first flow channel section 12 along the radial X, and flows along the curvature of the first flow channel section 12, either radially X or axially Y. In the process of the coolant flowing through the first flow channel section 12, it flows through the first cooling chamber 15 corresponding to each of the seal members 40, and then the coolant flows out into the central axis 10 from the flow outlet 122 and into the turntable 20 from the second flow channel section 21. After entering the turntable 20, the coolant flows into the second cooling chamber 24 of the turntable 20 along the radial X, flows out from the second circulation section 23 of the turntable 20, and then circulates back into the central axis 10 via the first circulation section 14. Finally, the coolant flows out from the first circulation outlet 142 of the central shaft 10, completing the overall circulation process of the coolant.

[0040] As can be seen from this, the present invention is designed so that a first flow path portion 12 and a plurality of first cooling chambers 15 structures communicating with the first flow path portion 12 are installed on the central axis 10, and these are combined with the second cooling chambers 24 of the turntable 20 and the flow path portions between them to form one effective cooling circuit. As a result, each of the seal members 40 of the rotary table 100 is located next to each of the first cooling chambers 15, and the bearings 80 of the rotary table 100 correspond to the second cooling chambers 24. This design effectively removes the heat generated by components such as the seal members 40 and bearings 80 when the rotary table 100 is operating at high speed, suppressing the temperature rise of the entire rotary table 100 and maintaining the normal operation of the rotary table 100. At the same time, it maintains stable performance even when operated under high load for a long time, increasing the operating efficiency of the rotary table 100 and extending its service life.

[0041] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of Symbols]

[0042] Y-axis direction X Radial 100 Rotating Table 10 Center axis 101 Center axis top surface 102 Side view of the central axis ring 103 Center shaft body 104 Ring Kit 11. Flow channel inlet section 111 Channel Inlet 12 First channel section 121 Flow channel entrance 122 Flow outlet 13 Channel outlet part 131 Outlet channel section 132 Confluence section 133 Flow outlet 14 1st circulation part 141 1st circulation entrance 142 1st circulation outlet 15. First Cooling Chamber 20 Turntables 21 Second channel section 22 Cooling Chamber 221 First Chamber Opening 222 Second Chamber Opening 23 Second circulation part 24. Second Cooling Chamber 241 First Chamber Opening 242 Second Chamber Opening 30 Shuroza 40 sealing member 50 rotors 60 stata 70 Braking device 80 bearings 90 Bearing Holder

Claims

1. It is formed along the axial direction and has a plurality of flow path inlet portions, a plurality of first flow path portions that are in communication with each of the flow path inlet portions and enclose the axial direction, a flow path outlet portion that is in communication with each of the first flow path portions, and a first circulation portion parallel to the axial direction, with both ends of the first circulation portion being a central axis which is the first circulation inlet and the first circulation outlet, A rotary table having a cooling circuit, characterized by comprising a turntable having a second flow path portion locked to the central axis and communicating with the flow path outlet portion, a cooling chamber communicating with the second flow path portion, and a second circulation portion communicating between the cooling chamber and the first circulation inlet.

2. The rotary table having a cooling circuit according to claim 1, wherein the central axis further has a central axis upper surface and a central axis ring side surface, each of the flow path inlet portions has a flow path inlet located on the central axis ring side surface, the flow path outlet portion is radial and has a plurality of outlet flow path portions that are each connected to each of the first flow path portions, and a confluence portion that is connected to each of the outlet flow path portions, and the confluence portion has a flow path outlet located on the central axis upper surface and connected to the second flow path portion.

3. The rotary table having a cooling circuit according to claim 1, characterized in that the cooling chamber is annular or spiral in shape and has a first chamber opening that is in communication with the second flow path portion, and a second chamber opening that is spaced apart from the first chamber opening and is in communication with the second circulation portion.

4. It is formed along the axial direction and has a first flow channel portion, a plurality of first cooling chambers communicating with the first flow channel portion, and a first circulation portion parallel to the axial direction, the ends of the first flow channel portion being a flow channel inlet and flow channel outlet, respectively, and the ends of the first circulation portion being a central axis which is a first circulation inlet and first circulation outlet, respectively. A rotary table having a cooling circuit, characterized by comprising a turntable having a second flow channel portion locked to the central axis and communicating with the flow channel outlet, a second cooling chamber communicating with the second flow channel portion, and a second circulation portion communicating between the second cooling chamber and the first circulation inlet.

5. The rotary table having a cooling circuit according to claim 4, wherein the central shaft comprises a central shaft body and a ring kit covering the central shaft body, and each first cooling chamber is installed between the central shaft body and the ring kit.

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