Arc-shaped motor direct-drive rotary table

Abstract

The utility model discloses an arc-shaped motor direct drive rotary table which comprises a rotary table and a fixing assembly, the fixing assembly is provided with a bearing seat and a bearing assembled on the bearing seat, the arc-shaped motor direct drive rotary table further comprises a rotating plate, the rotating plate is arranged on the outer side of the bearing in a sleeved mode, and the rotating plate is fixedly connected with the rotary table relatively. The outer ring of the bearing is clamped and fixed between the rotating plate and the turntable; the arc-shaped motor stator is fixedly connected with the fixing assembly; the arc-shaped motor rotor is located on the inner side of the arc-shaped motor stator and fixed to the rotating plate, and the arc-shaped motor rotor and the arc-shaped motor stator are matched to form a torque motor so as to directly drive the rotating disc to conduct arc-shaped rotation. The arc-shaped motor rotor and the arc-shaped motor stator are matched to form the torque motor to directly drive the rotary table to perform arc-shaped rotation, the torque is large, the overall size is small, the overall appearance of the direct-drive rotary table is small, and the requirement for miniaturization of the direct-drive rotary table can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to an arc-shaped motor direct-driven turntable. Background Art

[0002] The direct-drive turntable utilizes a direct drive method to directly transmit the motor drive torque to the rotating parts, thereby achieving high-precision rotation. It is suitable for application scenarios with high requirements for rotation smoothness, rotation speed and accuracy, such as machine tools, semiconductor equipment, medical equipment, precision measuring instruments, etc.

[0003] The direct-drive turntable in the prior art uses a high-torque, low-speed rotating motor to directly drive the rotating parts. This high-torque, low-speed rotating motor has a large number of poles and brushes, which causes the motor to have a larger outer size, making the overall outer size of the direct-drive turntable larger. A direct-drive turntable with a larger outer size is difficult to meet the requirements for miniaturization of the direct-drive turntable in application scenarios such as semiconductor equipment and precision instruments. Utility Model Content

[0004] The utility model aims to at least solve the technical problem that the existing direct-drive turntable has a large external size, and proposes an arc-shaped motor direct-drive turntable with the characteristics of large torque, small external size and simple assembly to meet the needs of miniaturization of the direct-drive turntable.

[0005] The utility model provides an arc-shaped motor direct-drive turntable, comprising a turntable and a fixing assembly, wherein the fixing assembly is provided with a bearing seat and a bearing assembled on the bearing seat, and further comprising:

[0006] A rotating plate is sleeved on the outer side of the bearing, and the rotating plate is relatively fixedly connected to the rotating disk so that the outer ring of the bearing is clamped and fixed between the rotating plate and the rotating disk;

[0007] An arc-shaped motor stator is fixedly connected to the fixing assembly;

[0008] The arc-shaped motor mover is located at the inner side of the arc-shaped motor stator and fixed on the rotating plate. The arc-shaped motor mover and the arc-shaped motor stator are adapted to form a torque motor to directly drive the turntable to rotate in an arc shape.

[0009] Preferably, the bearing seat comprises a shaft sleeve and an outer support platform located on the outer side of the shaft sleeve, and the inner ring of the bearing is sleeved on the shaft sleeve and abuts against the outer support platform.

[0010] Preferably, the arc motor direct-drive turntable also includes a top plate with an external pressure platform, the external pressure platform abuts against the upper end surface of the inner ring of the bearing, and the top plate is fixedly connected to the bearing seat so that the inner ring of the bearing is limited and fixed between the bearing seat and the top plate.

[0011] Preferably, the rotating plate and the turntable both have a first avoidance groove and a second avoidance groove for avoiding the inner ring of the bearing, the inner wall of the first avoidance groove is provided with an inner support platform, the inner wall of the second avoidance groove is provided with an inner pressure platform, and the rotating plate and the turntable are locked so that the outer ring of the bearing abuts between the inner pressure platform and the inner support platform.

[0012] Preferably, the axial height between the inner support and the lower side of the rotating plate is smaller than the axial height between the outer support and the upper side of the fixed component, and an avoidance gap is formed between the lower side of the rotating plate and the upper side of the fixed component.

[0013] Preferably, the arc-shaped motor stator has an arc-shaped guide groove; the arc-shaped motor mover includes a coil mounting seat and a coil box fixedly connected to the coil mounting seat, a coil winding is arranged in the coil box, and one end of the coil box forms an arc-shaped sliding fit with the arc-shaped guide groove.

[0014] Preferably, the coil box is provided with a wire outlet hole at the end close to the coil mounting seat, and the cable of the coil winding is led out from the wire outlet hole.

[0015] Preferably, the outer side surface of the turntable is provided with an arc grating ruler, and the fixing component is provided with a reading head used in conjunction with the arc grating ruler.

[0016] Preferably, the fixing assembly includes a base plate and a support seat fixed to the lower side of the base plate; the arc-shaped motor stator is fixed on the support seat, and the arc-shaped motor mover is fixed on the base plate.

[0017] Preferably, an arc-shaped end is provided at the end of the bottom plate for avoiding the arc-shaped motor mover, and anti-collision blocks are respectively provided on both sides of the arc-shaped end to limit the movement range of the arc-shaped motor mover.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model adopts a torque motor formed by the arc-shaped motor mover and the arc-shaped motor stator to directly drive the turntable to rotate in an arc shape, with large torque and small overall size, so that the overall appearance of the direct-drive turntable is compact and can meet the needs of miniaturization of the direct-drive turntable. At the same time, the bearing is fixed to the fixed assembly through the bearing seat, and the outer ring of the bearing is clamped and fixed between the rotating plate and the turntable, so that the overall structure of the direct-drive turntable is compact and easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the arc motor direct-drive turntable.

[0021] Figure 2It is a schematic diagram of the exploded structure of the arc motor direct-drive turntable.

[0022] Figure 3 It is a schematic diagram of the internal structure of the arc motor direct-drive turntable.

[0023] Figure 4 yes Figure 3 A partial enlarged view of .

[0024] Figure 5 It is a structural schematic diagram of the arc motor rotor.

[0025] Figure 6 It is a structural schematic diagram of another embodiment of an arc motor direct-driven turntable.

[0026] The meanings of the numbers in the figure are as follows: 1-bottom plate, 11-arc end, 12-anti-collision block, 19-support seat, 191-arc wire groove, 2-bearing seat, 21-sleeve, 22-external support platform, 221-first fixing hole, 3-bearing, 4-rotating plate, 41-inner support platform, 42-third fixing hole, 5-turntable, 51-inner pressure platform, 52-second fixing hole, 6-arc motor stator, 61-arc guide groove, 7-arc motor mover, 71-coil mounting seat, 72-coil box, 721-wire outlet hole, 73-cable, 8-top plate, 81-external pressure platform, 82-fourth fixing hole, 92-arc grating scale, 93-reading head. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific implementation methods, structures, features and effects of the present application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0028] Combination Figure 1-Figure 4 As shown, the utility model discloses an arc-shaped motor direct-driven turntable, comprising a fixed component and a turntable 5 that can rotate relative to the fixed component, the fixed component being provided with a bearing seat 2 and a bearing 3 assembled on the bearing seat 2; further comprising: a rotating plate 4 sleeved on the outside of the bearing 3, the rotating plate 4 being relatively fixedly connected to the turntable 5, so that the outer ring of the bearing 3 is clamped and fixed between the rotating plate 4 and the turntable 5; an arc-shaped motor stator 6 fixed on the fixed component; an arc-shaped motor mover 7 located on the inner side of the arc-shaped motor stator 6, the arc-shaped motor mover 7 being fixed on the rotating plate 4, the arc-shaped motor mover 7 and the arc-shaped motor stator 6 being adapted to form a torque motor, so as to directly drive the turntable 5 to rotate in an arc shape relative to the fixed component by utilizing the bearing 3.

[0029] The arc-shaped motor mover 7 and the arc-shaped motor stator 6 are adapted to form a torque motor, which has a large torque and a small overall size, so that the overall appearance of the direct-drive turntable is compact and can meet the needs of miniaturization of the direct-drive turntable. At the same time, the bearing 3 is fixed to the fixed assembly through the bearing seat 2, and the outer ring of the bearing 3 is clamped and fixed between the rotating plate 4 and the turntable 5, so that the overall structure of the direct-drive turntable is compact and easy to assemble.

[0030] The fixing assembly includes a base plate 1 and a support seat 19 located on the other side of the base plate 1 relative to the bearing seat 2. The support seat 19 can be a hollow structure, which is convenient for installing electrical equipment and cable routing on the arc motor.

[0031] The base plate 1 and the support seat 19 are an integral structure or a split fixed assembly structure, the base plate 1 and the bearing seat 2 can also be an integral structure or a split fixed assembly structure, and the arc-shaped motor stator 6 can be fixed on the base plate 1 or on the support seat 19, without limitation.

[0032] The bearing seat 2 includes a sleeve 22 and an outer support 21 located on the outer side of the sleeve 22. The inner ring of the bearing 3 is sleeved on the sleeve 22 and abuts against the outer support 21. The sleeve 22 fixes the inner ring of the bearing 3, and the outer support 21 provides support for the inner ring of the bearing 3.

[0033] The bearing seat 2 is usually an integrated structure to have better overall strength, so as to provide more stable and reliable support for the bearing 3.

[0034] The rotating plate 4 and the turntable 5 both have a first avoidance groove and a second avoidance groove for avoiding the inner ring of the bearing 3. Therefore, the sizes of the first avoidance groove and the second avoidance groove are both larger than the size of the inner ring of the bearing 3, but smaller than the size of the outer ring of the bearing 3; the inner wall of the first avoidance groove is provided with an inner support platform 41, and the inner wall of the second avoidance groove is provided with an inner pressure platform 51, the rotating plate 4 and the turntable 5 are locked, and the upper end face and the lower end face of the outer ring of the bearing 3 are respectively abutted against the inner pressure platform 51 and the inner support platform 41, so that the outer ring of the bearing 3 is clamped and assembled between the rotating plate 4 and the turntable 5, so that the bearing 3, the turntable 5, the rotating plate 4 and the arc-shaped motor mover 7 fixed on the rotating plate 4 are fixedly assembled into a rotating component that can rotate relative to the fixed component.

[0035] For example, the turntable 5 is provided with a plurality of second fixing holes 52 around the second air avoidance groove, and the rotating plate 4 is provided with a plurality of third fixing holes 42 around the first air avoidance groove. The turntable 5 and the rotating plate 4 can be locked and assembled by passing fixing parts such as screws through the second fixing holes 52 and the third fixing holes 42 at corresponding positions. The operation is simple and easy to assemble.

[0036] In order to prevent the rotating plate 4 from interfering with the base plate 1 during rotation, the axial height between the inner support 41 and the lower side of the rotating plate 4 is set to be smaller than the axial height between the outer support 21 and the upper side of the base plate 1, so that there is an avoidance gap between the lower side of the rotating plate 4 and the upper side of the base plate 1.

[0037] The direct-drive turntable further includes a top plate 8 , which is fixedly connected to the bearing seat 2 so that the inner ring of the bearing 3 is limitedly fixed between the bearing seat 2 and the top plate 8 .

[0038] The top plate 8 has an external pressure platform 81, which abuts against the upper end surface of the inner ring of the bearing 3, and the lower end surface of the inner ring of the bearing 3 abuts against the external support platform 21. Such a structure makes the fixing structure of the bearing 3 on the bearing seat 2 more reliable.

[0039] For example, the top plate 8 has a plurality of fourth fixing holes 82, and the sleeve 22 is correspondingly provided with a plurality of first fixing holes 221. The turntable 5 and the rotating plate 4 can be locked and assembled by passing fixing parts such as screws through the fourth fixing holes 82 and the first fixing holes 221 at corresponding positions for locking.

[0040] The arc-shaped motor stator 6 is usually made of magnets and has an arc-shaped guide groove 61. The arc-shaped motor stator 6 is directly fixed on the base plate 1 or the support seat 19.

[0041] Further integration Figure 5 As shown, the arc-shaped motor mover 7 includes a coil mounting seat 71 and a coil box 72 fixedly connected to the coil mounting seat 71, and a coil winding is arranged in the coil box 72. One end of the coil box 72 is located in the arc-shaped guide groove 61 of the arc-shaped motor stator 6, and the end of the coil box 72 forms an arc-shaped sliding fit with the arc-shaped guide groove, so that the arc-shaped motor stator 6 can slide in an arc shape along the arc-shaped guide groove 61 according to the end of the coil box 72.

[0042] The coil mounting seat 71 is fixed to the bottom plate 1 or the support seat 19 by screws or the like. A wire outlet hole 721 is provided at the end of the coil box 72 near the coil mounting seat 71, and the cable 73 of the coil winding is led out from the wire outlet hole 721 for easy wiring.

[0043] In some embodiments, the arc-shaped motor stator 6 is fixed on a support seat 19, the end of the base plate 1 located below the arc-shaped motor mover 7 is set as an arc-shaped end 11, and the positive projection of the coil mounting seat 71 is located on the outside of the arc-shaped end 11, so that the arc-shaped end 11 is kept away from the coil mounting seat 71.

[0044] Anti-collision blocks 12 are respectively provided on both sides of the arc-shaped end 11, and the anti-collision blocks 12 are used to limit the movement range of the arc-shaped motor mover 7 to prevent the arc-shaped motor mover 7 from escaping from the arc-shaped motor stator 6 due to excessive arc rotation angle.

[0045] The anti-collision block 12 can be arranged on the inner side of the arc-shaped end 11 or on the outer side of the arc-shaped end 11. Figure 6 shown.

[0046] In addition, an arc-shaped wire groove 191 is provided on the support seat 19 corresponding to the lower portion of the cable 73 , and the cable 73 passes through the arc-shaped wire groove 191 for routing, so that the cable 73 can swing in the arc-shaped wire groove 191 when the arc-shaped motor mover 7 rotates in an arc shape.

[0047] In addition, an arc grating ruler 92 is provided on the outer side of the turntable 5 , and a reading head 93 used in conjunction with the arc grating ruler 92 is fixed on the base plate 1 or the support seat 19 .

[0048] In order to avoid blocking or collision of the arc grating ruler 92 during use, the arc grating ruler 92 and the arc motor stator 6 are respectively fixed on two opposite sides of the turntable 5.

[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An arc-shaped motor direct-drive turntable, comprising a turntable and a fixing assembly, wherein the fixing assembly is provided with a bearing seat and a bearing assembled on the bearing seat, characterized in that: The direct-drive turntable also includes: A rotating plate is sleeved on the outer side of the bearing, and the rotating plate is relatively fixedly connected to the rotating disk so that the outer ring of the bearing is clamped and fixed between the rotating plate and the rotating disk; An arc-shaped motor stator is fixedly connected to the fixing assembly; The arc-shaped motor mover is located at the inner side of the arc-shaped motor stator and fixed on the rotating plate. The arc-shaped motor mover and the arc-shaped motor stator are adapted to form a torque motor to directly drive the turntable to rotate in an arc shape.

2. The arc-shaped motor direct-drive turntable according to claim 1, characterized in that: The bearing seat comprises a shaft sleeve and an outer support platform located on the outer side of the shaft sleeve, and the inner ring of the bearing is sleeved on the shaft sleeve and abuts against the outer support platform.

3. The arc-shaped motor direct-drive turntable according to claim 1, characterized in that: It also includes a top plate with an external pressure platform, the external pressure platform abuts against the upper end surface of the inner ring of the bearing, and the top plate is fixedly connected to the bearing seat so that the inner ring of the bearing is limited and fixed between the bearing seat and the top plate.

4. The arc-shaped motor direct-drive turntable according to claim 2, characterized in that: The rotating plate and the turntable both have a first avoidance groove and a second avoidance groove for avoiding the inner ring of the bearing. The inner wall of the first avoidance groove is provided with an inner support platform, and the inner wall of the second avoidance groove is provided with an inner pressure platform. The rotating plate and the turntable are locked so that the outer ring of the bearing abuts between the inner pressure platform and the inner support platform.

5. The arc-shaped motor direct-drive turntable according to claim 4, characterized in that: The axial height between the inner support and the lower side of the rotating plate is smaller than the axial height between the outer support and the upper side of the fixed component, and an avoidance gap is formed between the lower side of the rotating plate and the upper side of the fixed component.

6. The arc-shaped motor direct-drive turntable according to claim 1, characterized in that: The arc-shaped motor stator has an arc-shaped guide groove; the arc-shaped motor mover includes a coil mounting seat and a coil box fixedly connected to the coil mounting seat, a coil winding is arranged in the coil box, and one end of the coil box forms an arc-shaped sliding fit with the arc-shaped guide groove.

7. The arc-shaped motor direct-drive turntable according to claim 6, characterized in that: The coil box is provided with a wire outlet hole at the end close to the coil mounting seat, and the cables of the coil winding are led out from the wire outlet hole.

8. The arc-shaped motor direct-drive turntable according to claim 1, characterized in that: The outer side surface of the turntable is provided with an arc grating ruler, and the fixing component is provided with a reading head used in conjunction with the arc grating ruler.

9. The arc-shaped motor direct-drive turntable according to claim 1, characterized in that: The fixing assembly comprises a base plate and a support seat fixed to the lower side of the base plate; the arc-shaped motor stator is fixed on the support seat, and the arc-shaped motor mover is fixed to the base plate.

10. The arc-shaped motor direct-drive turntable according to claim 9, characterized in that: An arc-shaped end for avoiding the arc-shaped motor mover is provided at the end of the bottom plate, and anti-collision blocks are respectively provided on both sides of the arc-shaped end to limit the movement range of the arc-shaped motor mover.

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