Lathe electric spindle with self-locking core connecting disc assembly

Abstract

The invention relates to the technology of machine tool equipment, and discloses a self-locking cylinder connecting disc assembly lathe electric spindle which is composed of a main body assembly and a connecting assembly. The main body assembly comprises a box body, a bearing seat, a bearing, a cooling sleeve, a rotor, a stator and the like. The box body is used for supporting and accommodating parts. One end of the central shaft is connected with the numerical control lathe chuck, and the other end of the central shaft penetrates through the box body to be matched with the connecting disc. The connecting disc is divided into a front connecting disc and a rear connecting disc, the front connecting disc is of a pentagonal structure, and the rear connecting disc is connected with the oil cylinder. And a conical surface and a key are designed at the tail end of the central shaft and are matched with a key groove and an inclined surface structure in the through hole of the connecting disc to realize self-locking centering. An annular groove and a counterweight hole are formed in the surface of the rear receiving disc, and the gravity center can be adjusted through a first bolt.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool equipment, in particular to a lathe electric spindle with a self-locking core connecting disc assembly. Background Art

[0002] As a revolutionary technological innovation, the electric spindle highly integrates the functions of the machine tool spindle and the spindle motor, achieving seamless docking between the two in design. The core of this technology is that the spindle is directly driven by the built-in motor, completely abandoning the complex and easily worn transmission components such as gears, belts or couplings in the traditional spindle system. This change not only reduces the length of the machine tool spindle transmission chain to zero, but also greatly improves the operating efficiency and accuracy of the entire system.

[0003] Publication No. CN110773759B discloses a self-locking core connecting disc assembly lathe electric spindle, including a machine base and a machine body, the connecting disc assembly includes a shaft core, the first end of the shaft core is connected to the chuck of the CNC lathe; a connecting disc, the connecting disc has a connecting hole, and the second end of the shaft core is connected to the connecting disc through the inner circumference of the connecting hole; wherein, the outer surface of the second end of the shaft core is provided with a first conical surface, and the hole wall of the connecting hole is provided with a conical surface structure that matches the first conical surface. By providing the first conical surface at the second end of the shaft core and by providing the inclined surface structure that matches the first conical surface in the connecting hole, the self-locking core function can be achieved when the shaft core and the connecting disc are assembled, and at the same time, the axis of the connecting disc and the axis of the shaft core are always in the same position, ensuring that the shaft core of the lathe can always be connected to the oil cylinder device through the connecting disc during high-speed rotation, and such a setting can ensure the transmission accuracy of the electric spindle.

[0004] During the actual use of the equipment, the counterweights used to keep the connection plate stable are too complicated, and the number of counterweights cannot be changed according to the counterweight ratio that needs to be adjusted, resulting in the equipment being unable to adapt to a variety of workpieces to be processed. Summary of the invention

[0005] The present application solves the technical problem in the prior art that the number of counterweight blocks cannot be changed according to the counterweight ratio that needs to be adjusted, resulting in the inability to adapt to a variety of processing workpieces, by providing a self-locking core connecting disk assembly lathe electric spindle. By selecting the corresponding counterweight hole in the annular groove of the rear connecting disk, the first bolt is threadedly connected in the counterweight hole, and the first bolt can also adjust the position of the center of gravity of the connecting disk by the depth of the threaded connection with the counterweight hole; the design of the first bolt and the counterweight hole realizes the technical effect that the center of gravity of the connecting disk can be flexibly adjusted and the adjustment accuracy is high.

[0006] The present application provides a lathe electric spindle with a self-locking core connecting disc assembly, which is characterized by comprising a main body assembly and a connecting assembly; The main assembly includes a housing, a first bearing seat, a first bearing, a cooling jacket, a rotor, a stator and a second bearing; A through hole is opened in the middle of the box body to support and accommodate other components; The cooling jacket is fixedly connected to the middle part of the box body and is used to cool the rotor and the stator; The stator is rotatably connected in the cooling jacket; The rotor is fixedly connected inside the stator; The first bearing seat is fixedly connected to one end inside the box; The first bearing is fixedly connected to the first bearing seat; The second bearing seat is fixedly connected to the other end inside the box body; The second bearing is fixedly connected to the second bearing seat; The connecting assembly includes a central shaft and a connecting disk; One end of the central shaft is connected to the chuck of the CNC lathe, and the other end passes through the box; The connecting plate is provided with a through hole co-centered thereon; The radius of the other end of the central axis is gradually reduced, so that the surface of the other end of the central axis forms a first conical surface; The other end surface of the central shaft is fixedly connected with a key; The connection plate is further divided into a front connection plate and a rear connection plate; The front receiving plate is a pentagonal structure; The rear connecting plate is used to connect with the oil cylinder; A key slot for key connection is formed on one end of the inner surface of the through hole close to the front connecting plate; The other end of the central shaft passes through the through hole and is positioned and matched with the keyway through the key; The through hole is coaxially provided with an inclined surface structure matched with the first conical surface, so that the center shaft and the connecting disk can be assembled to achieve a self-locking effect; The surface of the rear receiving plate is provided with an annular groove; A plurality of counterweight holes are co-centrically provided in the annular groove for adjusting the center of gravity of the connecting plate; The counterweight hole is provided with an internal thread; One end of the first bolt is provided with an external thread, so that the first bolt can be matched with the thread of the counterweight hole; The first bolt can also adjust the position of the center of gravity of the connection plate by the depth of the threaded connection with the counterweight hole; Preferably, the connecting plate includes a second bolt; a bidirectional thread is provided in the counterweight hole; the outer section of the first bolt is provided with a left-hand thread; the outer section of the second bolt is provided with a right-hand thread; the first bolt thread and the second bolt can play a role in axial fine-tuning of the connecting plate according to the depth of the threaded connection with the counterweight hole; Preferably, a first circular hole and a second circular hole are opened through the axis at one end of the first bolt, and the two are symmetrical; the first circular hole and the second circular hole have the same diameter; the first bolt also includes a copper bar, a magnesium bar, iron powder, a first mounting cover and a second mounting cover; the copper bar is installed in the first circular hole, and the magnesium bar is installed in the second circular hole, so as to improve the weight ratio and realize the adjustment of the center of gravity of the connecting plate; a symmetrical first fixing hole is opened on the surface of one end of the first bolt and the concentric surface of the first circular hole; a symmetrical first fixing hole is opened on the surface of one end of the first bolt and the concentric surface of the second circular hole; Preferably, the first mounting cover also includes a first fixing block; the first fixing block is symmetrically fixed on the first mounting cover; the shape of the first fixing block matches the shape of the first fixing hole; the first mounting cover is detachably connected to one end of the first bolt through the first fixing block and the first fixing hole; the other end of the first bolt has a third circular hole opened through the axis; the diameter of the third circular hole is twice the diameter of the first circular hole; the third circular hole is filled with iron powder to further increase the adjustment range of the weight ratio; the other end of the first bolt has a symmetrical second fixing hole opened on the surface concentric with the third circular hole; the second mounting cover also includes a second fixing block; the second fixing block is symmetrically fixed on the second mounting cover; the shape of the second fixing block matches the shape of the second fixing hole; the second mounting cover cooperates with the second fixing hole through the second fixing block, so that the second mounting cover is detachably connected to the other end of the first bolt; One or more technical solutions provided in this application have at least the following technical effects or advantages: The bevel structure cooperates with the first conical surface of the central axis to realize a self-locking center. The design of the self-locking center structure enables the connection plate to be automatically aligned with the central axis during assembly without the need for additional positioning and adjustment steps, thereby improving assembly efficiency and accuracy. The first bolt is threadedly connected to the counterweight hole by selecting a corresponding counterweight hole in the annular groove of the rear connection plate, and the first bolt can also adjust the position of the center of gravity of the connection plate by the depth of the threaded connection with the counterweight hole, thereby achieving the technical effect that the design of the first bolt structure and the counterweight hole enables the center of gravity of the connection plate to be flexibly adjusted with high adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 The overall structure diagram of the lathe electric spindle with self-locking core connecting plate assembly; Figure 2The keyway structure diagram of the lathe electric spindle of the self-locking core connecting plate assembly; Figure 3 Schematic diagram of the center shaft structure of the lathe electric spindle with a self-locking center connection plate assembly; Figure 4 Schematic diagram of the first bolt structure of the lathe electric spindle of the self-locking core connecting plate assembly; Figure 5 A half-section structural diagram of the connection plate of the lathe electric spindle with a self-locking connection plate assembly; Figure 6 Bidirectional thread structure diagram of lathe electric spindle embodiment 2 of self-locking core connecting plate assembly; Figure 7 A structural diagram of the first fixing hole of the lathe electric spindle of the self-locking core connecting plate assembly in Embodiment 3; Figure 8 Structural diagram of the first mounting cover of the lathe electric spindle embodiment 3 of the self-locking core connecting plate assembly; In the figure: 100, central axis, 110, first bearing seat, 111, second bearing seat, 120, first bearing, 130, housing, 140, cooling jacket, 150, rotor, 160, stator, 170, second bearing, 180, key, 200, connecting plate, 210, front connecting plate, 211, through hole, 212, keyway, 220, rear connecting plate, 221, annular groove, 222, counterweight hole, 230, first bolt, 231, second thread, 232, first fixing hole, 233, first circular hole, 234, second circular hole, 235, second fixing hole, 236, third circular hole, 240, first mounting cover, 241, first fixing block, 250, second mounting cover, 251, second fixing block; DETAILED DESCRIPTION

[0008] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0009] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0010] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0011] Embodiment 1: Figures 1 to 5 As shown, the self-locking core connecting disc assembly lathe electric spindle of the present application is characterized in that it includes a main body assembly and a connecting assembly; The main assembly includes a housing 130, a first bearing seat 110, a first bearing 120, a cooling jacket 140, a rotor 150, a stator 160 and a second bearing 170; The box body 130 has a through hole 211 in the middle thereof, which is used to support and accommodate other components; The cooling jacket 140 is fixedly connected to the middle of the box body 130 and is used to cool the rotor 150 and the stator 160; The stator 160 is rotatably connected in the cooling jacket 140; The rotor 150 is fixedly connected inside the stator 160; The first bearing seat 110 is fixedly connected to one end inside the box body 130; The first bearing 120 is fixedly connected to the first bearing seat 110; The second bearing seat 111 is fixedly connected to the other end inside the box body 130; The second bearing 170 is fixedly connected to the second bearing seat 111; The connection assembly includes a central shaft 100 and a connection disk 200; One end of the central shaft 100 is connected to the chuck of the CNC lathe, and the other end passes through the box 130; The connecting disk 200 is provided with a through hole 211 co-centered thereon; The radius of the other end of the central axis 100 is gradually reduced, so that the surface of the other end of the central axis 100 forms a first conical surface; The other end surface of the central shaft 100 is fixedly connected with a key 180; The connection plate 200 is further divided into a front connection plate 210 and a rear connection plate 220; The front receiving plate 210 is a pentagonal structure; The rear connecting plate 220 is used to connect with the oil cylinder; The inner surface of the through hole 211 is provided with a key slot 212 at one end close to the front receiving plate 210 for connecting the key 180; The other end of the central shaft 100 passes through the through hole 211 and is positioned and matched with the keyway 212 through the key 180; The through hole 211 is coaxially provided with an inclined surface structure matched with the first conical surface, so that the center shaft 100 and the connecting disk 200 can be assembled to achieve a self-locking effect; The surface of the rear receiving plate 220 is provided with an annular groove 221; The annular groove 221 is provided with a plurality of counterweight holes 222 cocentrically therein for adjusting the center of gravity of the connecting plate 200; The counterweight hole 222 is provided with an internal thread; One end of the first bolt 230 is provided with an external thread, so that the first bolt 230 can be threadedly matched with the counterweight hole 222; The first bolt 230 can also adjust the position of the center of gravity of the connection plate 200 by the depth of the threaded connection with the counterweight hole 222; Specific implementation: First, connect one end of the center shaft 100 to the chuck of the CNC lathe to ensure that the center shaft is firmly fixed, then put the front connecting plate 210 of the connecting plate 200 on the other end of the center shaft 100, and realize circumferential positioning through the cooperation of the key 180 and the keyway 212. At the same time, the inclined surface structure is used to cooperate with the first conical surface of the center shaft to realize self-locking center; according to the center of gravity position that needs to be adjusted, select the corresponding counterweight hole 222 in the annular groove 221 of the rear connecting plate 220, and thread the first bolt 230 into the counterweight hole, and the connection of the connecting plate is completed; Beneficial effects: The design of the self-locking center structure enables the connection plate 200 to be automatically aligned with the central axis 100 during assembly, without the need for additional positioning and adjustment steps, thereby improving assembly efficiency and accuracy; the design of the first bolt 230 structure and the counterweight hole 222 enables the center of gravity of the connection plate 200 to be flexibly adjusted with high adjustment accuracy. This effectively solves the technical problem in the prior art that the number of counterweight blocks cannot be changed according to the counterweight ratio to be adjusted, resulting in the inability to adapt to a variety of processing workpieces; Embodiment 2: Since the first bolt 230 may become loose during high-speed operation, the connecting plate 200 and the first bolt 230 are improved; like Figure 6 As shown, the connecting plate 200 includes a second bolt 231; The counterweight hole is provided with a bidirectional thread; The outer cross section of the first bolt 230 is provided with a left-hand thread; The outer cross section of the second bolt 231 is provided with a right-hand thread; The threads of the first bolt 230 and the second bolt 231 can play a role in axial fine-tuning of the connection plate according to the depth of the threaded connection with the counterweight hole 222; First, after fixing the central shaft 100, connect the connecting plate 200 to the other end of the central shaft 100. After ensuring that the connecting plate 200 is firmly connected to the central shaft 100, the second bolt 231 and the first bolt 230 are threadedly connected to the counterweight hole 222 in sequence according to the center of gravity position to be adjusted, and the first bolt 230 and the second bolt can play a role of axial fine adjustment on the connecting plate according to the depth of the threaded connection; effectively solving the problem that the first bolt 230 may become loose during high-speed operation; Embodiment 3: In order to further refine the weight ratio to adjust the center of gravity of the connecting plate 200, the first bolt 230 is further improved; like Figures 7 to 8 As shown, a first circular hole 233 and a second circular hole 234 are formed through the axis at one end of the first bolt 230, and the two are symmetrical; The first circular hole 233 and the second circular hole 234 have the same diameter; The first bolt 230 also includes a copper bar 270, a magnesium bar 260, iron powder 280, a first installation cover 240 and a second installation cover 250; The copper bar 270 is installed in the first circular hole 233, and the magnesium bar 260 is installed in the second circular hole 234, so as to improve the weight ratio and adjust the center of gravity of the connection plate 200; A symmetrical first fixing hole 232 is formed on the surface of one end of the first bolt 230 which is cocentric with the first circular hole 233; A symmetrical first fixing hole 232 is formed on the surface of one end of the first bolt 230 which is cocentric with the second circular hole 234; The first installation cover 240 further includes a first fixing block 241; the first fixing block 241 is symmetrically fixed on the first installation cover 240; The shape of the first fixing block 241 matches the shape of the first fixing hole 232; The first mounting cover 240 is detachably connected to one end of the first bolt 230 through the first fixing block 241 and the first fixing hole 232; The other end of the first bolt 230 has a third circular hole 236 formed through the axis; The diameter of the third circular hole 236 is twice the diameter of the first circular hole 233; The third circular hole 236 is filled with iron powder 280 to further increase the adjustment range of the weight ratio; The other end of the first bolt 230 is provided with a symmetrical second fixing hole 235 on the surface cocentric with the third circular hole 236; The second installation cover 250 also includes a second fixing block 251; The second fixing block 251 is symmetrically fixed on the second installation cover 250; The shape of the second fixing block 251 matches the shape of the second fixing hole 235; The second installation cover 250 cooperates with the second fixing hole 235 through the second fixing block 251, so that the second installation cover 250 is detachably connected to the other end of the first bolt 230; By adding copper bars 270, magnesium bars 260, and iron powder 280 as counterweights to adjust the weight ratio, the adjustment of the center of gravity position of the connecting plate 200 can be further refined, thereby improving the machining accuracy and stability of the lathe electric spindle.

[0012] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A self-locking core connecting plate assembly lathe electric spindle, comprising a main assembly and a connecting assembly, wherein the main assembly comprises a housing (130), a first bearing seat (110), a first bearing (120), a cooling jacket (140), a rotor (150), a stator (160) and a second bearing (170), characterized in that: A through hole (211) is formed in the middle of the box body (130) to support and accommodate other components; The cooling jacket (140) is fixedly connected to the middle of the box body (130) and is used to cool the rotor (150) and the stator (160); The stator (160) is rotatably connected inside the cooling jacket (140); The rotor (150) is fixedly connected inside the stator (160); The first bearing seat (110) is fixedly connected to one end inside the box body (130); The first bearing (120) is fixedly connected to the first bearing seat (110); The second bearing seat (111) is fixedly connected to the other end inside the box body (130); The second bearing (170) is fixedly connected to the second bearing seat (111); The connection assembly comprises a central shaft (100) and a connection disk (200); One end of the central shaft (100) is connected to the chuck of the CNC lathe, and the other end passes through the box (130).

2. The self-locking center connecting plate assembly lathe electric spindle according to claim 1, characterized in that: The connecting disk (200) is provided with a through hole (211) co-centered thereon; The radius of the other end of the central axis (100) is gradually reduced, so that the surface of the other end of the central axis (100) forms a first conical surface; A key (180) is fixedly connected to the other end surface of the central shaft (100); The connection plate (200) is further divided into a front connection plate (210) and a rear connection plate (220); The front receiving plate (210) is a pentagonal structure; The rear connecting plate (220) is used to be connected to the oil cylinder; A key slot (212) for connecting a key (180) is formed at one end of the inner surface of the through hole (211) close to the front connecting plate (210); The other end of the central shaft (100) passes through the through hole (211) and is positioned and matched with the keyway (212) through the key (180); The through hole (211) is coaxially provided with an inclined surface structure that matches the first conical surface, so that a self-locking function can be achieved when the central shaft (100) and the connecting disk (200) are assembled; The surface of the rear connecting plate (220) is provided with an annular groove (221).

3. The self-locking center connecting plate assembly lathe electric spindle according to claim 2, characterized in that: A plurality of counterweight holes (222) are co-centrically formed in the annular groove (221) for adjusting the center of gravity of the connecting plate (200); The counterweight hole (222) is provided with an internal thread; The connecting plate (200) further includes a first bolt (230); The outer cross-section of the first bolt (230) is provided with an external thread, so that the first bolt (230) can be threadedly matched with the counterweight hole (222); The first bolt (230) can also adjust the position of the center of gravity of the connection plate (200) through the depth of the threaded connection with the counterweight hole (222).

4. The self-locking center connecting plate assembly lathe electric spindle according to claim 3, characterized in that: The connecting disk (200) comprises a second thread (231); A bidirectional thread is provided in the counterweight hole (222); The outer cross-section of the first bolt (230) is provided with a left-hand thread; The outer cross-section of the second thread (231) is provided with a right-hand thread.

5. The self-locking center connecting plate assembly lathe electric spindle according to claim 4, characterized in that: The outer cross-section of the first bolt (230) is provided with a left-hand thread; The outer cross-section of the second bolt (231) is provided with a right-hand thread; The thread of the first bolt (230) and the second bolt (231) can perform axial fine adjustment on the connection plate according to the depth of the threaded connection with the counterweight hole (222).

6. The self-locking core connecting plate assembly lathe electric spindle according to claim 5, characterized in that: A first circular hole (233) and a second circular hole (234) are formed through the axis at one end of the first bolt (230), and the two circular holes are symmetrical; The first circular hole (233) and the second circular hole (234) have the same diameter; The first bolt (230) further includes a copper bar (270), a magnesium bar (260), iron powder (280), a first installation cover (240), and a second installation cover (250); The copper bar (270) is installed in the first circular hole (233), and the magnesium bar (260) is installed in the second circular hole (234), so as to improve the weight balance ratio and achieve the adjustment of the center of gravity of the connection plate (200).

7. The self-locking core connecting plate assembly lathe electric spindle according to claim 6, characterized in that: A symmetrical first fixing hole (232) is formed on a surface of one end of the first bolt (230) which is cocentric with the first circular hole (233); A symmetrical first fixing hole (232) is formed on a surface of one end of the first bolt (230) and cocentric with the second circular hole (234); The first installation cover (240) further comprises a first fixing block (241); the first fixing block (241) is symmetrically fixed on the first installation cover (240); The shape of the first fixing block (241) matches the shape of the first fixing hole (232).

8. The self-locking center connecting plate assembly lathe electric spindle according to claim 7, characterized in that: The first mounting cover (240) is detachably connected to one end of the first bolt (230) by means of a first fixing block (241) cooperating with the first fixing hole (232); A third circular hole (236) is formed at the other end of the first bolt (230) through the axis; The diameter of the third circular hole (236) is twice the diameter of the first circular hole (233).

9. The self-locking center connecting plate assembly lathe electric spindle according to claim 8, characterized in that: The third circular hole (236) is filled with iron powder (280), further increasing the adjustment range of the weight ratio.

10. The self-locking core connecting plate assembly lathe electric spindle according to claim 9, characterized in that: A symmetrical second fixing hole (235) is formed on the surface of the other end of the first bolt (230) which is cocentric with the third circular hole (236); The second mounting cover (250) further comprises a second fixing block (251); The second fixing block (251) is symmetrically fixed on the second installation cover (250); The shape of the second fixing block (251) matches the shape of the second fixing hole (235); The second installation cover (250) cooperates with the second fixing hole (235) via the second fixing block (251), so that the second installation cover (250) is detachably connected to the other end of the first bolt (230).

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