Direct-drive dual-axis turntable

Abstract

The present invention relates to a direct-drive two-axis turntable, which includes a four-axis assembly, a front waterproof plate, a power output ring, a five-axis assembly and a workbench. A first cooling channel is formed between the four-axis housing and the four-axis motor. The front waterproof plate is sleeved on the outer wall of one end of the four-axis rotating shaft and fixed to one end of the four-axis housing. The power output ring is arranged at one end of the four-axis rotating shaft. A second cooling channel is formed between the front waterproof plate and the four-axis rotating shaft, and the second cooling channel is communicated with the first cooling channel. A third cooling channel is formed between the five-axis housing and the five-axis motor, and the third cooling channel is communicated with the second cooling channel. The heat generated by the coils in the four-axis motor and the five-axis motor, the heat generated by the friction of the five-axis rotating shaft and the heat transferred from the five-axis motor to the five-axis rotating shaft are taken away, which is beneficial to improving the heat dissipation efficiency. Moreover, the first cooling channel, the second cooling channel and the third cooling channel are connected in series, making the overall structure layout of the direct-drive two-axis turntable compact.

Description

Technical Field

[0001] The present invention relates to the technical field of numerically controlled turntables, and particularly to a direct-drive dual-axis turntable. Background Art

[0002] The direct-drive dual-axis turntable is a core functional component of a five-axis linkage machining center, and is commonly used in cooperation with the three-axis or four-axis of a machine tool to machine complex parts. The direct-drive dual-axis turntable generally includes a four-axis assembly, a five-axis assembly and a workbench. The four-axis assembly includes a four-axis motor and a four-axis rotating shaft. The five-axis assembly includes a five-axis motor and a five-axis rotating shaft. The four-axis motor drives the four-axis rotating shaft to rotate, thereby driving the five-axis assembly and the workbench as a whole to swing within a certain angle range. The five-axis motor drives the five-axis rotating shaft to rotate, thereby driving the workbench to rotate 360° around the axis where the five-axis rotating shaft is located.

[0003] During the working process, a large amount of heat will be generated in the coils of the four-axis motor and the five-axis motor. During the swinging process of the four-axis rotating shaft, it will also generate heat by friction with other contacting parts. If this heat is not dissipated in time, in severe cases, the coils in the four-axis motor and the five-axis motor will be burned out and short-circuited, and the accuracy of the direct-drive dual-axis turntable will be reduced, the failure rate will increase, and the production efficiency will decrease. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a direct-drive dual-axis turntable that can effectively improve the heat dissipation efficiency.

[0005] A direct-drive dual-axis turntable, comprising:

[0006] A four-axis assembly, including a four-axis housing, a four-axis motor and a four-axis rotating shaft. The four-axis rotating shaft is disposed through the four-axis housing. The four-axis motor is disposed inside the four-axis housing and between the inner side wall of the four-axis housing and the outer side wall of the four-axis rotating shaft. A first cooling channel is formed between the four-axis housing and the four-axis motor;

[0007] A front waterproof plate and a power output ring. The front waterproof plate is sleeved on the outer side wall of one end of the four-axis rotating shaft and fixed to one end of the four-axis housing. A second cooling channel is formed between the front waterproof plate and the four-axis rotating shaft. The second cooling channel is communicated with the first cooling channel. The power output ring is disposed at one end of the four-axis rotating shaft;

[0008] A five-axis assembly, including a five-axis housing, a five-axis motor and a five-axis rotating shaft. The five-axis housing is fixedly connected to the power output ring. The five-axis rotating shaft is disposed through the five-axis housing. The five-axis motor is disposed inside the five-axis housing and between the inner side wall of the five-axis housing and the outer side wall of the five-axis rotating shaft. A third cooling channel is formed between the five-axis housing and the five-axis motor. The third cooling channel is communicated with the second cooling channel;

[0009] A workbench is provided at one end of the five-axis rotating shaft.

[0010] In one embodiment, the four-axis assembly further includes a cooling sleeve. The four-axis motor includes a four-axis rotor and a four-axis stator. The four-axis rotor is fixed on the four-axis rotating shaft. The four-axis stator is located between the four-axis rotor and the cooling sleeve. A first groove is formed on the cooling sleeve. The first cooling channel is jointly formed between the first groove and the inner side wall of the four-axis housing; or

[0011] The four-axis motor includes a four-axis rotor and a four-axis stator. The four-axis rotor is fixed on the four-axis rotating shaft. The four-axis stator is located between the four-axis rotor and the four-axis housing. A first groove is formed on the four-axis stator. The first cooling channel is jointly formed between the first groove and the inner side wall of the four-axis housing.

[0012] In one embodiment, a first liquid inlet pipeline, a first liquid outlet pipeline and a second liquid outlet pipeline are formed on the four-axis housing. The first liquid inlet pipeline is used to connect the cooling source and the first cooling channel. The first liquid outlet pipeline is used to connect the first cooling channel and the second cooling channel. The second liquid outlet pipeline is used to connect the second cooling pipeline and the outside.

[0013] In one embodiment, a second groove and a third groove are formed on the front waterproof plate. The second groove and the third groove are distributed at intervals and are not directly connected. The second cooling channel is jointly formed between the second groove and the outer side wall of the four-axis rotating shaft and between the third groove and the outer side wall of the four-axis rotating shaft.

[0014] In one embodiment, a first inlet pipeline and a first outlet pipeline are further formed on the front waterproof plate. A first communication pipeline and a second communication pipeline are formed at one end of the four-axis rotating shaft. The first inlet pipeline is respectively connected to the first liquid outlet pipeline and the second groove. The first communication pipeline is respectively connected to the second groove and the third cooling channel. The second communication pipeline is respectively connected to the third cooling channel and the third groove. The first outlet pipeline is respectively connected to the third groove and the second liquid outlet pipeline.

[0015] In one embodiment, a first passage and a second passage are formed on the power output ring. The first passage is connected to the first communication pipeline and the third cooling channel. The second passage is connected to the second communication pipeline and the third cooling channel.

[0016] In one embodiment, a third passage and a fourth passage are formed in the five-axis housing. The third passage is respectively in communication with the first passage and the third cooling passage, and the fourth passage is respectively in communication with the second passage and the third cooling passage.

[0017] In one embodiment, the five-axis motor includes a five-axis rotor and a five-axis stator. The five-axis rotor is fixed on the five-axis rotating shaft. The five-axis stator is located between the five-axis rotor and the five-axis housing. A fourth groove is formed in the five-axis stator. The third cooling passage is jointly formed between the fourth groove and the inner sidewall of the five-axis housing; or

[0018] The five-axis assembly further includes a cooling sleeve. The five-axis motor includes a five-axis rotor and a five-axis stator. The five-axis rotor is fixed on the five-axis rotating shaft. The five-axis stator is located between the five-axis rotor and the cooling sleeve. A fourth groove is formed in the cooling sleeve. The third cooling passage is jointly formed between the fourth groove and the inner sidewall of the five-axis housing.

[0019] In one embodiment, a sealing structure is further included. The sealing structure includes an air passage and a sealing ring. The air passage is formed in the five-axis housing. The sealing ring is fixedly installed on the five-axis housing. The sealing ring is located between the five-axis housing and the workbench, and there is a gap between the sealing ring and the workbench. An air vent groove is formed on one side of the sealing ring facing the five-axis housing. The air vent groove is in communication with the air passage. Air vent holes are formed on the sidewall of the air vent groove, and the air vent holes are in communication with the gap.

[0020] In one embodiment, the sealing ring includes a fixing portion, a boss portion and a blocking portion. The boss portion is located between the fixing portion and the blocking portion. A fixing hole is formed in the fixing portion. The air vent groove is formed at the bottom of the boss portion. An accommodation space is formed between the blocking portion and the workbench, and a sealing ring is arranged in the accommodation space.

[0021] The direct-drive two-axis turntable has at least the following advantages:

[0022] A first cooling channel is formed between the four-axis housing and the four-axis motor. The front waterproof plate is sleeved on the outer wall of one end of the four-axis rotating shaft and fixed to one end of the four-axis housing. The power output ring is arranged at one end of the four-axis rotating shaft. A second cooling channel is formed between the front waterproof plate and the four-axis rotating shaft. The second cooling channel is communicated with the first cooling channel. A third cooling channel is formed between the five-axis housing and the five-axis motor. The third cooling channel is communicated with the second cooling channel. The first cooling channel is used for dissipating heat from the four-axis housing and the four-axis motor. The second cooling channel is used for dissipating heat from the four-axis rotating shaft and the front waterproof plate. The third cooling channel is used for dissipating heat from the five-axis housing and the five-axis motor. Therefore, not only can the four-axis housing, the four-axis motor, the five-axis housing and the five-axis motor be cooled by heat dissipation, but also the five-axis rotating shaft and the front waterproof plate can be cooled by heat dissipation, taking away the heat generated by the coils in the four-axis motor and the five-axis motor, the heat generated by friction of the five-axis rotating shaft and the heat transferred from the five-axis motor to the five-axis rotating shaft, which is beneficial to improving the heat dissipation efficiency. And the first cooling channel, the second cooling channel and the third cooling channel are connected in series, making the layout of the entire direct drive dual-axis turntable structure compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of a direct drive dual-axis turntable in an embodiment;

[0024] Figure 2 is Figure 1 a three-dimensional sectional view;

[0025] Figure 3 is Figure 1 a front view of

[0026] Figure 4 is a sectional view along the Figure 3 A-A line in

[0027] Figure 5 is a sectional view along the Figure 3 B-B line in

[0028] Figure 6 is Figure 1 a bottom view of

[0029] Figure 7 is a sectional view along the Figure 6 C-C line in

[0030] Figure 8 is a sectional view along the Figure 6 D-D line in

[0031] Figure 9 is Figure 2 an enlarged view at E in

[0032] In the figure, 10 is a direct-drive two-axis turntable; 100 is a four-axis assembly; 200 is a front waterproof plate; 300 is a power output ring; 400 is a five-axis assembly; 500 is a workbench; 110 is a four-axis housing; 120 is a four-axis motor; 130 is a four-axis rotating shaft; 101 is a first cooling channel; 140 is a convex ring; 150 is a radial and axial bearing; 160 is a bearing seat; 170 is a deep groove ball bearing; 180 is a braking system; 190 is a protective cover; 102 is a second cooling channel; 131 is a first positioning surface; 132 is a second positioning surface; 310 is a third positioning surface; 320 is a fourth positioning surface; 410 is a five-axis housing; 420 is a five-axis motor; 430 is a five-axis rotating shaft; 103 is a third cooling channel; 121 is a cooling sleeve; 122 is a four-axis rotor; 123 is a four-axis stator; 124 is a first groove; 111 is a first liquid inlet pipeline; 112 is a first liquid outlet pipeline; 113 is a second liquid outlet pipeline; 210 is a second groove; 220 is a third groove; 230 is a first inlet pipeline; 240 is a first outlet pipeline; 133 is a first connecting pipeline; 134 is a second connecting pipeline; 330 is a first passage; 340 is a second passage; 411 is a third passage; 412 is a fourth passage; 421 is a five-axis rotor; 422 is a five-axis stator; 423 is a fourth groove; 610 is an air duct; 620 is a sealing ring; 630 is a ventilation groove; 640 is a ventilation hole; 611 is a first air duct segment; 612 is a second air duct segment; 621 is a fixing portion; 622 is a convex portion; 623 is a blocking portion; 624 is a V-shaped sealing ring. Detailed implementation manners

[0033] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of this invention are only for the purpose of describing specific embodiments and are not intended to limit the invention. The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0036] Please refer to Figure 1 and Figure 2 , a direct-drive two-axis turntable 10 in an embodiment includes a four-axis assembly 100, a front waterproof plate 200, a power output ring 300, a five-axis assembly 400, and a workbench 500.

[0037] The four-axis assembly 100 includes a four-axis housing 110, a four-axis motor 120, and a four-axis rotating shaft 130. The four-axis rotating shaft 130 passes through the four-axis housing 110. The four-axis motor 120 is disposed inside the four-axis housing 110 and between the inner side wall of the four-axis housing 110 and the outer side wall of the four-axis rotating shaft 130. A first cooling channel 101 is formed between the four-axis housing 110 and the four-axis motor 120. By introducing a coolant into the first cooling channel 101, it can be used to cool the four-axis motor 120 and the four-axis housing 110.

[0038] Further, a convex ring 140 protrudes from the inner side wall of the four-axis housing 110. A radial and axial bearing 150 is sleeved on one end of the four-axis rotating shaft 130, and the radial and axial bearing 150 is located between the convex ring 140 and the four-axis rotating shaft 130. A bearing seat 160 is further disposed inside the four-axis housing 110. A deep groove ball bearing 170 is sleeved on the other end of the four-axis rotating shaft 130. The deep groove ball bearing 170 is sleeved on the other end of the four-axis rotating shaft 130 and is located between the four-axis rotating shaft 130 and the bearing seat 160. The four-axis motor 120 is located inside the four-axis housing 110 and between the bearing seat 160 and the convex ring 140.

[0039] Further, a braking system 180 is further disposed on the other end of the four-axis rotating shaft 130. The braking system 180 is used to hold the four-axis rotating shaft 130 for braking. Specifically, the braking system 180 can be a pneumatic braking system. The direct-drive two-axis turntable 10 further includes a protective cover 190. The protective cover 190 is disposed on the end face of the four-axis housing 110 and covers the other end of the four-axis rotating shaft 130 to prevent external moisture from entering.

[0040] The front waterproof plate 200 is sleeved on the outer side wall of one end of the four-axis rotating shaft 130 and fixed to one end of the four-axis housing 110. The front waterproof plate 200 is mainly used to prevent external water vapor from entering the interior of the four-axis housing 110 and affecting the electrical performance of the internal components. A second cooling channel 102 is formed between the front waterproof plate 200 and the four-axis rotating shaft 130, and the second cooling channel 102 communicates with the first cooling channel 101. The second cooling channel 102 is used to cool the four-axis rotating shaft 130 and the front waterproof plate 200.

[0041] The power output ring 300 is arranged at one end of the four-axis rotating shaft 130. Specifically, both ends of the four-axis rotating shaft 130 are open and hollow. A tapered hole is formed at one end of the four-axis rotating shaft 130. The end face of the tapered hole forms a first positioning surface 131, and the side wall of the tapered hole forms a second positioning surface 132. One end of the power output ring 300 is tapered. The outer side wall of one end of the power output ring 300 forms a third positioning surface 310, and the end face of the power output ring 300 facing the four-axis rotating shaft 130 forms a fourth positioning surface 320. When the power output ring 300 is assembled onto the four-axis rotating shaft 130, the third positioning surface 310 cooperates with the first positioning surface 131, and the second positioning surface 132 cooperates with the fourth positioning surface 320, so as to better realize the positioning between the power output ring 300 and the four-axis rotating shaft 130.

[0042] The five-axis assembly 400 includes a five-axis housing 410, a five-axis motor 420 and a five-axis rotating shaft 430. The five-axis housing 410 is fixedly connected to the power output ring 300. The five-axis rotating shaft 430 passes through the five-axis housing 410. The five-axis motor 420 is arranged inside the five-axis housing 410 and is located between the inner side wall of the five-axis housing 410 and the outer side wall of the five-axis rotating shaft 430. A third cooling channel 103 is formed between the five-axis housing 410 and the five-axis motor 420, and the third cooling channel 103 communicates with the second cooling channel 102. The third cooling channel 103 is used to cool the five-axis housing 410 and the five-axis motor 420.

[0043] The workbench 500 is arranged at one end of the five-axis rotating shaft 430 and rotates with the rotation of the five-axis rotating shaft 430. Place the workpiece to be processed on the workbench 500. During operation, the five-axis motor 420 drives the five-axis rotating shaft 430 to rotate, thereby driving the workbench 500 to make a 360° rotation. The four-axis motor 120 drives the four-axis to swing, thereby driving the entire five-axis assembly 400 to swing. Therefore, the workpiece placed on the workbench 500 can not only achieve a 360° rotation but also perform a swing.

[0044] The first cooling channel 101 is used to dissipate heat from the four-axis housing 110 and the four-axis motor 120. The second cooling channel 102 is used to dissipate heat from the four-axis rotating shaft 130 and the front waterproof plate 200. The third cooling channel 103 is used to dissipate heat from the five-axis housing 410 and the five-axis motor 420. Therefore, not only can the four-axis housing 110, the four-axis motor 120, the five-axis housing 410, and the five-axis motor 420 be cooled, but also the five-axis rotating shaft 430 and the front waterproof plate 200 can be cooled. The heat generated by the coils in the four-axis motor 120 and the five-axis motor 420, the heat generated by friction of the five-axis rotating shaft 430, and the heat transferred from the five-axis motor 420 to the five-axis rotating shaft 430 are taken away, which is beneficial to improving the heat dissipation efficiency. Moreover, the first cooling channel 101, the second cooling channel 102, and the third cooling channel 103 are connected in series, making the overall structure layout of the direct drive dual-axis turntable 10 compact.

[0045] Furthermore, the four-axis assembly 100 further includes a cooling sleeve 121. The four-axis motor 120 includes a four-axis rotor 122 and a four-axis stator 123. The four-axis rotor 122 is fixed on the four-axis rotating shaft 130. For example, the four-axis rotor 122 can be fixed on the four-axis rotor 122 through a rotor fixing ring. The four-axis stator 123 is located between the four-axis rotor 122 and the cooling sleeve 121. The cooling sleeve 121 is provided with a first groove 124. The first groove 124 and the inner side wall of the four-axis housing 110 together form the first cooling channel 101. Specifically, the first groove 124 can be a spiral groove. Or, the first groove 124 is an annular groove, and the number of the first grooves 124 is multiple. The multiple first grooves 124 are arranged at intervals, and each adjacent two first grooves 124 are connected through a communication groove.

[0046] Of course, in other embodiments, the four-axis motor 120 includes a four-axis rotor 122 and a four-axis stator 123. The four-axis rotor 122 is fixed on the four-axis rotating shaft 130. The four-axis stator 123 is located between the four-axis rotor 122 and the four-axis housing 110. The four-axis stator 123 is provided with a first groove 124. The first groove 124 and the inner side wall of the four-axis housing 110 together form the first cooling channel 101. That is, in this embodiment, the first groove 124 is directly opened on the four-axis stator 123, and the cooling sleeve 121 is omitted.

[0047] Please refer to Figures 3 to 5, on the four-axis housing 110, a first liquid inlet pipeline 111, a first liquid outlet pipeline 112, and a second liquid outlet pipeline 113 are provided. The first liquid inlet pipeline 111 is used to connect the cooling source and the first cooling channel 101. The first liquid outlet pipeline 112 is used to connect the first cooling channel 101 and the second cooling channel 102. The second liquid outlet pipeline 113 is used to connect the second cooling channel 102 with the outside. The first liquid inlet pipeline 111, the first liquid outlet pipeline 112, and the second liquid outlet pipeline 113 are all provided on the four-axis housing 110 and are connected to the outside through the first liquid inlet pipeline 111 and the second liquid outlet pipeline 113. Compared with the traditional method of separately designing independent liquid inlet pipelines and liquid outlet pipelines on the four-axis component 100 and the five-axis component 400, the layout in this embodiment is more compact and reasonable.

[0048] Further, on the front waterproof plate 200, a second groove 210 and a third groove 220 are provided. The second groove 210 and the third groove 220 are distributed at intervals and are not directly connected. A second cooling channel 102 is jointly formed between the second groove 210 and the outer side wall of the four-axis rotating shaft 130 and between the third groove 220 and the outer side wall of the four-axis rotating shaft 130. In this embodiment, both the first groove 124 and the second groove 210 are circular grooves, and they are arranged at intervals along the axial direction of the four-axis rotating shaft 130.

[0049] Please refer to Figures 3 to 8 , further, a first inlet pipeline 230 and a first outlet pipeline 240 are also provided on the front waterproof plate 200. One end of the four-axis rotating shaft 130 is provided with a first communication pipeline 133 and a second communication pipeline 134. The first inlet pipeline 230 is respectively connected to the first liquid outlet pipeline 112 and the second groove 210. The first communication pipeline 133 is respectively connected to the second groove 210 and the third cooling channel 103. The second communication pipeline 134 is respectively connected to the third cooling channel 103 and the third groove 220. The first outlet pipeline 240 is respectively connected to the third groove 220 and the second liquid outlet pipeline 113. That is, the first cooling channel 101 is connected to the third cooling channel 103 through the first inlet pipeline 230 on the front waterproof plate 200 and the first communication pipeline 133 on the four-axis rotating shaft 130. After the coolant circulates in the third cooling channel 103, it then flows to the second communication pipeline 134 and the second groove 210, and then flows out of the four-axis housing 110 through the second liquid outlet pipeline 113.

[0050] Further, a first passage 330 and a second passage 340 are formed in the power output ring 300. The first passage 330 communicates with the first connecting pipeline 133 and the third cooling channel 103, and the second passage 340 communicates with the second connecting pipeline 134 and the third cooling channel 103. Since the power output ring 300 is located between the front waterproof plate 200 and the five-axis housing 410, and cooling channels are formed on both the front waterproof plate 200 and the five-axis housing 410, the design of forming the first passage 330 and the second passage 340 in the power output ring 300 is more reasonable.

[0051] Further, a third passage 411 and a fourth passage 412 are formed in the five-axis housing 410. The third passage 411 communicates with the first passage 330 and the third cooling channel 103 respectively, and the fourth passage 412 communicates with the second passage 340 and the third cooling channel 103 respectively.

[0052] That is, please refer to Figure 4 , the coolant of the cooling source is introduced into the first cooling channel 101 from the first liquid inlet pipeline 111. Please refer to Figure 5 , after circulating through the first cooling channel 101, it flows to the first liquid outlet pipeline 112, and then flows to the first inlet pipeline 230. The first inlet pipeline 230 communicates with the second groove 210. Please refer to Figure 8 , after the coolant flows into the second groove 210, it then flows to the first connecting pipeline 133 communicating with the second groove 210. The first connecting pipeline 133 communicates with the first passage 330, and the first passage 330 communicates with the third cooling channel 103. Therefore, the coolant flows from the first passage 330 to the third passage 411 and flows into the third cooling channel 103 from the third passage 411. Please refer to Figure 7 , after the coolant circulates in the third cooling channel 103, it flows to the fourth passage 412, flows from the fourth passage 412 to the second passage 340, then flows to the second connecting pipeline 134, and flows from the second connecting pipeline 134 to the third groove 220. Please refer to Figure 4 again, the coolant flows from the third groove 220 to the first outlet pipeline 240 and flows to the second liquid outlet pipeline 113, thereby flowing out of the four-axis housing 110, completing the coolant circulation of the four-axis assembly 100 and the five-axis assembly 400.

[0053] Please refer to Figure 2, the five-axis motor 420 includes a five-axis rotor 421 and a five-axis stator 422. The five-axis rotor 421 is fixed on the five-axis rotating shaft 430. The five-axis stator 422 is located between the five-axis rotor 421 and the five-axis housing 410. A fourth groove 423 is formed on the five-axis stator 422. A third cooling channel 103 is jointly formed between the fourth groove 423 and the inner side wall of the five-axis housing 410. The fourth groove 423 can be a spiral groove. Or the fourth groove 423 can be an annular groove, and the number of the fourth grooves 423 is multiple. The multiple fourth grooves 423 are arranged at intervals along the axial direction of the five-axis rotating shaft 430. Each adjacent two fourth grooves 423 are connected through a communication groove.

[0054] Certainly, in other embodiments, the five-axis assembly further includes a cooling sleeve. The five-axis motor includes a five-axis rotor and a five-axis stator. The five-axis rotor is fixed on the five-axis rotating shaft. The five-axis stator is located between the five-axis rotor and the cooling sleeve. A fourth groove is formed on the cooling sleeve. A third cooling channel is jointly formed between the fourth groove and the inner side wall of the five-axis housing. Similarly, the fourth groove can be a spiral groove. Or the fourth groove can be an annular groove, and the number of the fourth grooves is multiple. The multiple fourth grooves are arranged at intervals along the axial direction of the five-axis rotating shaft. Each adjacent two fourth grooves are connected through a communication groove.

[0055] Please refer to Figure 2 and Figure 9 , the direct-drive two-axis turntable 10 further includes a sealing structure. The sealing structure is used to improve the sealing performance between the five-axis assembly 400 and the workbench 500, and prevent external water vapor from entering the five-axis housing 410. Specifically, the sealing structure includes an air channel 610 and a sealing ring 620. The air channel 610 is formed on the five-axis housing 410. The sealing ring 620 is fixedly installed on the five-axis housing 410. The sealing ring 620 is located between the five-axis housing 410 and the workbench 500, and there is a gap between the sealing ring 620 and the workbench 500. An air vent groove 630 is formed on the side of the sealing ring 620 facing the five-axis housing 410. The air vent groove 630 is connected to the air channel 610. Air vent holes 640 are formed on the side wall of the air vent groove 630. The air vent holes 640 are connected to the gap.

[0056] Therefore, by introducing gas into the air channel 610, the gas enters the air vent groove 630 and blows through the air vent holes 640 to the gap between the sealing ring 620 and the workbench 500, forming a positive pressure air curtain at the gap between the sealing ring 620 and the workbench 500, effectively preventing external water vapor or impurity dust from entering through the gap, and improving the sealing performance. Moreover, in this solution, by adding a sealing ring 620 between the turntable housing and the workbench 500, and guiding the gas through the air vent groove 630 and the air vent holes 640 on the sealing ring 620 to form an air curtain sealing structure, the sealing effect is better.

[0057] Specifically, the air passage 610 includes a first air passage segment 611 and a second air passage segment 612, and the first air passage segment 611 and the second air passage segment 612 are arranged perpendicular to each other and intersect. For example, the first air passage segment 611 extends horizontally, and the second air passage segment 612 extends vertically. One end of the first air passage segment 611 is connected with a joint, and one end of the second air passage segment 612 is communicated with the ventilation groove 630. Therefore, after the second air passage segment 612 communicates with the ventilation groove 630, it is led out from the side surface of the five-axis housing 410 horizontally by the first air passage segment 611. Compared with the traditional way of directly leading out along the vertical direction from the bottom surface by the second air passage segment 612, the length of the second air passage segment 612 in this embodiment is shorter. Therefore, the strength of the five-axis housing 410 can be effectively enhanced, and the joint of the first air passage segment 611 is connected to the joint from the side surface of the five-axis housing 410, and then the joint is led out through the hollow four-axis rotating shaft 130. The layout is more reasonable, preventing the trachea from being exposed outside and damaged. Of course, in other embodiments, the first air passage segment 611 can also intersect with the second air passage segment 612 at an angle, such as an acute angle or an obtuse angle.

[0058] Furthermore, the ventilation groove 630 is an annular groove. Correspondingly, the number of the ventilation holes 640 can be multiple, and the multiple ventilation holes 640 are distributed at intervals along the circumferential direction. The sealing ring 620 includes a fixing portion 621, a convex portion 622 and a blocking portion 623. The convex portion 622 is located between the fixing portion 621 and the blocking portion 623. A fixing hole is opened on the fixing portion 621, and the sealing ring 620 is fixed on the five-axis housing 410 by passing a fastener through the fixing hole. The ventilation groove 630 is opened at the bottom of the convex portion 622. Therefore, the notch of the ventilation groove 630 faces the air passage 610, and the gas introduced into the air passage 610 will enter the ventilation groove 630 from the notch. A containing space is formed between the blocking portion 623 and the workbench 500, and a sealing ring is arranged in the containing space. When the air curtain sealing method is started, not started or fails, the sealing ring can play a further sealing role.

[0059] Furthermore, the annular groove has an inner side wall, an outer side wall and a bottom wall. The inner side wall and the outer side wall are oppositely arranged, and the bottom wall is located between the inner side wall and the outer side wall. The ventilation holes 640 are opened on the outer side wall and penetrate through the side surface of the convex portion 622.

[0060] Specifically, the sealing ring is a V-shaped sealing ring 624. The lip of the V-shaped sealing ring 624 abuts against the blocking portion 623, and the lip of the V-shaped sealing ring 624 faces the side surface of the convex portion 622, so that the V-shaped sealing ring 624, the workbench 500 and the convex portion 622 jointly enclose a liquid accumulation space. Therefore, even if external water vapor enters the interior through the gap, it will be blocked in the liquid accumulation space, preventing the water vapor from penetrating through the bearing and entering the interior space to damage components such as the stator and the rotor.

[0061] Furthermore, a groove is formed at the bottom of the fixing portion 621, and an O-ring is arranged in the groove. The O-ring mainly serves to seal between the sealing ring 620 and the turntable housing. Specifically, the O-ring is located between the fixing hole and the ventilation groove 630, which can prevent the O-ring from falling off between the sealing ring 620 and the five-axis housing 410 while playing a sealing role.

[0062] Furthermore, the top surface of the boss portion 622 is higher than the top surfaces of the fixing portion 621 and the blocking portion 623, so as to form a labyrinth gap between the workbench 500 and the sealing ring 620. Therefore, the path for external water vapor or dust impurities to enter the interior can be extended, and the probability of water vapor or dust impurities entering the interior can be reduced.

[0063] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.

[0064] The above-described embodiments merely represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A direct-drive dual-axis turntable, characterized in that Comprising: A four-axis assembly, including a four-axis housing, a four-axis motor and a four-axis rotating shaft. The four-axis rotating shaft is passed through the four-axis housing. The four-axis motor is arranged inside the four-axis housing and located between the inner side wall of the four-axis housing and the outer side wall of the four-axis rotating shaft. A first cooling channel is formed between the four-axis housing and the four-axis motor; A front waterproof plate and a power output ring. The front waterproof plate is sleeved on the outer side wall of one end of the four-axis rotating shaft and fixed to one end of the four-axis housing. A second cooling channel is formed between the front waterproof plate and the four-axis rotating shaft. The second cooling channel is communicated with the first cooling channel. The power output ring is arranged at one end of the four-axis rotating shaft; A five-axis assembly, including a five-axis housing, a five-axis motor and a five-axis rotating shaft. The five-axis housing is fixedly connected with the power output ring. The five-axis rotating shaft is passed through the five-axis housing. The five-axis motor is arranged inside the five-axis housing and located between the inner side wall of the five-axis housing and the outer side wall of the five-axis rotating shaft. A third cooling channel is formed between the five-axis housing and the five-axis motor. The third cooling channel is communicated with the second cooling channel; A workbench, arranged at one end of the five-axis rotating shaft; The four-axis motor includes a four-axis rotor and a four-axis stator. The four-axis rotor is fixed on the four-axis rotating shaft. The four-axis stator is located between the four-axis rotor and the four-axis housing. A first groove is opened on the four-axis stator. The first groove and the inner side wall of the four-axis housing together form the first cooling channel; Second grooves and third grooves are opened on the front waterproof plate. The second grooves and the third grooves are distributed at intervals and are not directly communicated with each other. The second grooves and the outer side wall of the four-axis rotating shaft and the third grooves and the outer side wall of the four-axis rotating shaft together form the second cooling channel; The five-axis motor includes a five-axis rotor and a five-axis stator. The five-axis rotor is fixed on the five-axis rotating shaft. The five-axis stator is located between the five-axis rotor and the five-axis housing. A fourth groove is opened on the five-axis stator. The fourth groove and the inner side wall of the five-axis housing together form the third cooling channel; The first groove and the second groove are both circular grooves and are arranged at intervals along the axial direction of the four-axis rotating shaft; A first liquid inlet pipeline and a first liquid outlet pipeline are opened on the four-axis housing. The first liquid inlet pipeline is used to connect the cooling source and the first cooling channel. The first liquid outlet pipeline is used to connect the first cooling channel and the second cooling channel; A first communication pipeline and a second communication pipeline are opened at one end of the four-axis rotating shaft. The first communication pipeline is respectively communicated with the second groove and the third cooling channel. The second communication pipeline is respectively communicated with the third cooling channel and the third groove; A second liquid outlet pipeline is opened on the four-axis housing. The second liquid outlet pipeline is used to communicate the second cooling channel with the outside; The front waterproof plate is also provided with a first inlet pipeline and a first outlet pipeline. The first inlet pipeline is respectively communicated with the first liquid outlet pipeline and the second groove, and the first outlet pipeline is respectively communicated with the third groove and the second liquid outlet pipeline. The power output ring is provided with a first passage and a second passage. The first passage is communicated with the first communication pipeline and the third cooling channel, and the second passage is communicated with the second communication pipeline and the third cooling channel.

2. The direct-drive dual-axis turntable according to claim 1, characterized in that, The four-axis assembly further includes a cooling sleeve. The four-axis motor includes a four-axis rotor and a four-axis stator. The four-axis rotor is fixed on the four-axis rotating shaft, the four-axis stator is located between the four-axis rotor and the cooling sleeve, and the cooling sleeve is provided with a first groove. The first groove and the inner side wall of the four-axis housing jointly form the first cooling channel.

3. The direct-drive dual-axis turntable according to claim 1, characterized in that, The five-axis housing is provided with a third passage and a fourth passage. The third passage is respectively communicated with the first passage and the third cooling channel, and the fourth passage is respectively communicated with the second passage and the third cooling channel.

4. The direct-drive dual-axis turntable according to any one of claims 1 to 3, characterized in that, The five-axis assembly further includes a cooling sleeve. The five-axis motor includes a five-axis rotor and a five-axis stator. The five-axis rotor is fixed on the five-axis rotating shaft, the five-axis stator is located between the five-axis rotor and the cooling sleeve, and the cooling sleeve is provided with a fourth groove. The fourth groove and the inner side wall of the five-axis housing jointly form the third cooling channel.

5. The direct-drive dual-axis turntable according to any one of claims 1 to 3, characterized in that, It further includes a sealing structure. The sealing structure includes an air duct and a sealing ring. The air duct is opened on the five-axis housing, the sealing ring is fixedly installed on the five-axis housing, the sealing ring is located between the five-axis housing and the workbench, and there is a gap between the sealing ring and the workbench. The side of the sealing ring facing the five-axis housing is provided with a ventilation groove, the ventilation groove is communicated with the air duct, and ventilation holes are opened on the side wall of the ventilation groove, and the ventilation holes are communicated with the gap.

6. The direct-drive two-axis turntable according to claim 5, wherein, The sealing ring includes a fixing part, a convex part and a blocking part. The convex part is located between the fixing part and the blocking part. The fixing part is provided with a fixing hole, the ventilation groove is opened at the bottom of the convex part, and a containing space is formed between the blocking part and the workbench, and a sealing ring is arranged in the containing space.

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