CN110026899A - A kind of planetary polishing device - Google Patents

Abstract

The invention relates to an end device for polishing, and provides a planetary polishing device aiming at the defects of unstable transmission, complex structure and large motion inertia of the existing planetary polishing device. The device includes a mounting seat, a drive motor, a driving shaft, a driven shaft and a sun gear assembly; the sun gear assembly includes a sun gear sleeve, a turntable, a hollow slider, a transition piece and a polishing disc; the sun gear sleeve is open up and down The convex-shaped connecting sleeve, the small end of which is rotatably arranged at the lower part of the mounting seat, and the large end is located outside the mounting seat; the driving shaft is connected with the driven shaft through the first transmission mechanism; the driving shaft is connected with the sun gear sleeve through the second transmission mechanism; The shaft of the turntable is provided with a through hole, and the lower part is provided with a T-shaped groove; the upper end of the hollow slider is provided with a clamping groove; the driven shaft is penetrated on the sun gear sleeve, and one end is connected with the turntable; the sun gear is fixed at the big end of the sun gear sleeve; transition; The upper part of the connecting piece is rotatably installed in the hollow sliding block; the outer circumference of the lower part of the transition piece is sleeved with a planetary wheel.

Description

A planetary polishing device

technical field

The invention relates to an end device for polishing, in particular to a planetary polishing device.

Background technique

Due to the excellent properties of aspherical optical elements, aspherical optical elements have been widely used in new-generation optical systems in recent years. However, due to the characteristics of non-uniform curvature of aspheric optical components, the required ultra-precision machining technology has always restricted the further development and application of aspheric surfaces. How to greatly improve the surface error convergence speed of optical aspheric surfaces is an urgent need. key issues to solve.

At present, computer-controlled optical surface forming technology is widely used in the field of aspheric surface processing. This technology uses the quantitative surface error data obtained by detection, combined with the removal function and the preset processing path, and obtains the dwell time according to a certain algorithm, so that the The surface error gradually converges, and finally meets the processing requirements.

Planetary polishing technology is a commonly used polishing technology in computer-controlled optical surface forming technology. However, the existing planetary polishing device has problems such as large rotational inertia, complicated structure of polishing head, and unstable power transmission.

For example, a Chinese patent (application number: CN200810051132.1) discloses a planetary active polishing device and method for optical components. The device adopts a parallel four-bar linkage mechanism to realize horizontal rotation, and the planetary motor drives the polishing die to rotate through a flexible shaft. However, due to the inherent properties of the flexible shaft transmission, its power transmission is not stable; and the rigidity of the parallel four-bar linkage is weak.

Another example, Chinese patent (application number: CN201410554563.5) discloses a large-diameter aspheric robot planetary polishing device, the rotation and revolution of the device are driven by two servo motors respectively, and the revolution transmission mechanism realizes the horizontal rotation of the planetary motion, The autorotation transmission mechanism adopts a secondary belt drive to fix the autorotation motor. However, the secondary belt drive makes the structure complicated, and the swing of the swing arm makes the motion inertia larger.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the shortcomings of the existing planetary polishing device such as unstable transmission, complex structure and large motion inertia, and provide a planetary polishing device. If the polishing device is combined with computer control technology, it can realize the polishing of high-efficiency and high-precision optical components, and is suitable for precision polishing of large-diameter aspherical components.

In order to achieve the above purpose, the technical solution provided by the present invention is: a planetary polishing device, which is special in that it includes a mounting seat and a drive motor, a driving shaft, a driven shaft and a sun gear assembly arranged on the mounting seat; The sun gear assembly includes a sun gear sleeve, a turntable, a hollow slider, a transition connection and a polishing disc; the sun gear sleeve is a convex connection sleeve with openings on both sides, and its small end is rotatably arranged at the lower part of the mounting seat, and the large The output shaft of the driving motor is connected with the driving shaft; the driving shaft is connected with the driven shaft through the first transmission mechanism; the driving shaft is connected with the sun gear sleeve through the second transmission mechanism; The lower part is provided with a T-shaped slot that runs through the turntable horizontally; the upper end of the hollow slider is provided with a slot that fits with the T-shaped slot, and its upper end is snapped into the T-shaped slot and can move along the T-shaped slot; the driven shaft passes through the T-shaped slot. It is arranged on the sun gear sleeve, one end of the sun gear sleeve extends into the large end through the small end of the sun gear sleeve, and is connected with the turntable arranged in the large end of the sun gear sleeve through the through hole, so as to drive the turntable to rotate; The inner wall of the head is fixedly installed with a sun gear with internal teeth; the upper part of the transition piece is rotatably installed in the hollow slider, and the polishing disc is connected with the transition piece; the lower part of the transition piece protrudes from the hollow slide, and its outer circumference is fixed Set of planet gears that mesh with the sun gear.

Further, the cross-section of the above-mentioned through hole is a polygon, which can be in the shape of a rectangle, a square or a regular hexagon; the shape of one end of the driven shaft connected to the turntable matches the shape of the through hole; A turntable bearing is arranged on the inner wall of the big end, and the inner ring of the turntable bearing is sleeved on the outer surface of the turntable; a pressure ring for pressing the turntable bearing is also arranged between the turntable bearing and the sun gear. The inner wall of the end fits tightly. By setting the turntable bearing, the shaking of the turntable rotation is further reduced, so that it runs more smoothly.

Further, the above-mentioned transition connecting piece is hinged with the polishing disc. Through the ball hinge, the polishing disc can be positively pressed against the mirror surface to ensure the stability of the polishing removal amount of the workpiece.

Further, the above-mentioned driven shaft is a hollow stepped shaft, and a rotary joint is installed on its upper end; the above-mentioned transition connecting piece is a cylinder, and the air inlet at the upper end of the cylinder is equipped with a lower rotary joint, and the lower rotary joint is connected to the hollow driven shaft through a pipeline. Connected at the bottom.

Further, the upper end of the outer circumference of the turntable is provided with a ring of flanges for axial positioning of the turntable.

Further, the above-mentioned first transmission mechanism is a gear transmission mechanism or a belt transmission mechanism or a chain transmission mechanism; the above-mentioned second transmission mechanism is a gear transmission mechanism or a belt transmission mechanism or a chain transmission mechanism.

Further, the above-mentioned first transmission mechanism includes a small driving pulley provided on the driving shaft, a large driven pulley provided on the driven shaft, and a first toothed belt connecting the small driving pulley and the large driven pulley. . The toothed belt drive has vibration absorption buffer, stable transmission, relatively accurate transmission, and can transmit power in a large distance between axes.

Further, the above-mentioned second transmission mechanism includes a large active pulley arranged on the driving shaft, a pulley seat sleeved on the driven shaft and fixedly connected with the sun gear sleeve, and a small driven pulley installed on the pulley seat. and a second toothed belt connecting the driving large pulley and the driven small pulley. The second transmission mechanism rotates the sun gear, and can adjust the revolution ratio of the buffing disc between the common and the self through the planetary gear meshed with the sun gear.

Further, the above-mentioned driving shaft and the driven shaft are parallel to each other and arranged at intervals; the mounting seat includes a base and a support shell fixed on the upper surface of the base, and the base is provided with a first mounting hole for installing the driving shaft and A second installation hole for installing the sun gear sleeve is provided, and a third installation hole for installing the drive motor is provided on the top of the support shell. The driving shaft is installed in the first installation hole through the bearing, and the small end of the sun gear sleeve is fixedly installed in the second installation hole. The support shell seals the first transmission mechanism and the second transmission mechanism to prevent the toothed belt debris from falling on the mirror surface; the structure of the support shell is easy to disassemble, and the transmission pulley can be easily replaced, and the public-to-self speed ratio can be adjusted.

Further, the upper part of the transition piece is installed in the hollow slider through a rolling bearing or a sliding bearing; the small end of the sun gear sleeve is installed in the second installation hole through a rolling bearing or a sliding bearing.

Compared with the prior art, the advantages of the present invention are:

1. The present invention adopts a planetary gear train structure, and only one motor is used to realize the revolution and rotation of the polishing disc, so that the polishing device has a simple structure, light weight and small moment of inertia.

2. The present invention adopts the first transmission mechanism, the second transmission mechanism and the sun gear assembly, which can conveniently adjust the eccentricity of the polishing disc and the ratio of the revolution to the revolution by replacing the gears or pulleys.

3. The present invention supplies compressed air to the cylinder through the upper rotary joint, the central hole of the driven shaft and the lower rotary joint to control the polishing pressure of the polishing disc; and then the polishing disc can be positively pressed against the mirror surface through the ball hinge, effectively ensuring the workpiece to be processed. Consistent polishing removal.

4. The polishing device of the present invention can realize the polishing of high-efficiency and high-precision optical elements in combination with computer control technology, and is suitable for precision polishing of large-diameter aspherical elements.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the polishing device of the present invention;

Fig. 2 is the isometric view of the turntable of the polishing device of the present invention;

3 is a perspective view of the hollow slider of the polishing device of the present invention;

4 is a front sectional view of Embodiment 1 of the polishing apparatus of the present invention;

5 is a front sectional view of Embodiment 2 of the polishing apparatus of the present invention;

6 is a front sectional view of Embodiment 3 of the polishing apparatus of the present invention;

FIG. 7 is a front sectional view of Embodiment 4 of the polishing apparatus of the present invention.

The description of each label in the figure is as follows:

1—mounting seat, 11—base, 12—supporting shell;

2—drive motor;

3—Drive shaft;

4—the first transmission mechanism, 41—the active small pulley, 42—the first toothed belt, 43—the driven large pulley;

5—driven shaft, 51—upper rotary joint;

6—Sun gear assembly;

61—Sun gear sleeve, 611—Turntable bearing, 612—Pressure ring, 613—Sun gear;

62—turntable, 621—through hole, 622—T-shaped slot;

63—Hollow slider;

64—transition connecting piece, 641—planet gear, 642—lower rotary joint;

65—polishing disc;

7—the second transmission mechanism, 71—the large active pulley, 72—the second toothed belt, 73—the small driven pulley, 74—the pulley seat.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Example 1

As shown in FIGS. 1 and 4 , this embodiment provides a planetary polishing device, including a mounting seat 1, a drive motor 2, a driving shaft 3, a first transmission mechanism 4, a second transmission mechanism 7, a driven shaft 5 and a sun Wheel assembly 6.

The mounting base 1 includes a base 11 and a support shell 12 fixed on the upper surface of the base 11 . The base 11 defines a first mounting hole and a second mounting hole, and the top of the support shell 12 defines a third mounting hole. The drive motor 2 is installed in the third installation hole of the support shell 12 , the driving shaft 3 is installed in the first installation hole through a bearing; the driven shaft 5 is arranged parallel to the driving shaft 3 in the installation seat 1 at intervals.

The sun gear assembly 6 includes a sun gear sleeve 61, a turntable 62, a hollow slider 63, a transition piece 64 and a polishing disc 65; the sun gear sleeve 61 is a convex connecting sleeve with openings up and down, and its small end is installed in the installation through a rolling bearing. In the second mounting hole of the base 1 , the big end is located outside the mounting base 1 .

The output shaft of the drive motor 2 is connected with the driving shaft 3 through a coupling; the driving shaft 3 is connected with the driven shaft 5 through the first transmission mechanism 4 , and is connected with the sun gear sleeve 61 through the second transmission mechanism 7 . The first transmission mechanism 4 includes a small driving pulley 41 arranged on the driving shaft 3 , a large driven pulley 43 arranged on the driven shaft 5 , and a first driving small pulley 41 and the large driven pulley 43 . Toothed belt 42 . The second transmission mechanism 7 includes a large driving pulley 71 disposed on the driving shaft 3, a pulley seat 74 that is sleeved on the driven shaft 5 and is fixedly connected with the sun gear sleeve 61, and a small driven pulley installed on the pulley seat. The pulley 73 and the second toothed belt 72 connecting the driving large pulley 71 and the driven small pulley 73 .

As shown in FIG. 2 , a through hole 621 is provided in the shaft center of the turntable 62, and a T-shaped groove 622 transversely penetrates the turntable 62 is provided at the lower part; 3), its upper end is installed on the T-shaped groove 622 of the turntable 62, and the hollow slider 63 can move along the T-shaped groove 622. After adjusting the eccentricity, use the screws on the hollow slider 63 to fix it.

The driven shaft 5 is passed through the sun gear sleeve 61 through the bearing, and one end of the driven shaft 5 extends into the large end through the small end of the sun gear sleeve 61, and through interference fit or welding with the through hole 621, the driven wheel 5 is connected to the sun gear sleeve 61. The turntable 62 in the big end of the wheel sleeve 61 is fixedly connected, so that the driven wheel 5 drives the turntable 62 to rotate.

The inner wall of the big end of the sun gear sleeve 61 is fixedly installed with a sun gear 613 with internal teeth; the upper part of the transition piece 64 is installed in the hollow slider 63 through a rolling bearing; the polishing disc 65 is connected with the transition piece 64 by spherical hinge; the transition connection The lower part of the piece 64 protrudes from the hollow sliding block 63 , the outer circumference of which is fixedly sleeved with a planetary gear 641 that engages with the sun gear 613 .

The working process of this embodiment:

During the polishing operation, the driving motor 2 drives the driving shaft 3 to rotate.

The driving shaft 3 rotates the driven shaft 5 through the first transmission mechanism 4, the driven shaft 5 drives the turntable 62 to rotate, and the turntable 62 makes the transition connecting piece 64 revolve around the driven shaft 5 through the hollow slider 63; The planetary gear 641 meshed with the sun gear 613 in the sun gear sleeve 61 drives the polishing disc 65 to revolve around the driven shaft 5; the polishing disc 65 rotates around its central axis while revolving;

At the same time, the driving shaft 3 drives the sun gear sleeve 61 to rotate through the second transmission mechanism 7, and the sun gear sleeve 61 rotates around its central axis through the mutually meshing sun gear 613 and the planetary gear 641; the sun gear sleeve 61 rotates while pushing The planetary wheel 641 rotates.

During polishing, the eccentricity of the polishing disk can be adjusted by replacing the planetary wheels 641 with different numbers of teeth and adjusting the position of the hollow slider on the turntable 62 .

It is also possible to adjust the rotational speed ratio of the polishing disc 65 by changing the number of teeth of the pulleys in the first transmission mechanism 4 and the second transmission mechanism 7 .

Embodiment 2

As shown in FIG. 1 and FIG. 5 , this embodiment provides a planetary polishing device, including a mounting seat 1, a driving motor 2, a driving shaft 3, a first transmission mechanism 4, a second transmission mechanism 7, a driven shaft 5 and a sun Wheel assembly 6. The driven shaft 5 is a hollow stepped shaft, and a rotary joint 51 is mounted on the upper end of the driven shaft 5 .

The mounting base 1 includes a base 11 and a support shell 12 fixed on the upper surface of the base 11 . The base 11 defines a first mounting hole and a second mounting hole, and the top of the support shell 12 defines a third mounting hole. The drive motor 2 is installed in the third installation hole of the support shell 12 , the driving shaft 3 is installed in the first installation hole through a bearing; the driven shaft 5 is arranged parallel to the driving shaft 3 in the installation seat 1 at intervals.

The sun gear assembly 6 includes a sun gear sleeve 61, a turntable 62, a hollow slider 63, a transition piece 64 and a polishing disc 65; the sun gear sleeve 61 is a convex connecting sleeve with openings up and down, and its small end is installed in the installation through a rolling bearing. In the second mounting hole of the base 1 , the big end is located outside the mounting base 1 . The transition piece 64 is a cylinder, and a lower rotary joint 642 is installed on the air inlet at the upper end of the cylinder, and the lower rotary joint 642 communicates with the lower end of the hollow driven shaft 5 through a pipeline.

The output shaft of the drive motor 2 is connected with the driving shaft 3 through a coupling; the driving shaft 3 is connected with the driven shaft 5 through the first transmission mechanism 4 , and is connected with the sun gear sleeve 61 through the second transmission mechanism 7 . The first transmission mechanism 4 includes a small driving pulley 41 arranged on the driving shaft 3, a large driven pulley 43 arranged on the driven shaft 5, and a first toothed belt 42 connecting the driving pulley and the driven pulley . The second transmission mechanism 7 includes a large driving pulley 71 disposed on the driving shaft 3, a pulley seat 74 that is sleeved on the driven shaft 5 and is fixedly connected with the sun gear sleeve 61, and a small driven pulley installed on the pulley seat. The pulley 73 and the second toothed belt 72 connecting the driving large pulley 71 and the driven small pulley 73 .

As shown in FIG. 2 , a through hole 621 is provided in the shaft center of the turntable 62, and a T-shaped groove 622 transversely penetrates the turntable 62 is provided at the lower part; 3), its upper end is installed on the T-shaped groove 622 of the turntable 62, and the hollow slider 63 can move along the T-shaped groove 622. After adjusting the eccentricity, use the screws on the hollow slider 63 to fix it.

The driven shaft 5 is passed through the sun gear sleeve 61 through the bearing, and one end of the driven shaft 5 extends into the large end through the small end of the sun gear sleeve 61, and through interference fit or welding with the through hole 621, the driven wheel 5 is connected to the sun gear sleeve 61. The turntable 62 in the big end of the wheel sleeve 61 is fixedly connected, so that the driven wheel 5 drives the turntable 62 to rotate.

The inner wall of the big end of the sun gear sleeve 61 is fixedly installed with a sun gear 613 with internal teeth; the upper part of the transition piece 64 is installed in the hollow slider 63 through a rolling bearing; the polishing disc 65 is connected with the transition piece 64 by spherical hinge; the transition connection The lower part of the piece 64 protrudes from the hollow sliding block 63 , the outer circumference of which is fixedly sleeved with a planetary gear 641 that engages with the sun gear 613 .

The working process of this embodiment:

During the polishing operation, the driving motor 2 drives the driving shaft 3 to rotate.

The driving shaft 3 rotates the driven shaft 5 through the first transmission mechanism 4, the driven shaft 5 drives the turntable 62 to rotate, and the turntable 62 makes the transition connecting piece 64 revolve around the driven shaft 5 through the hollow slider 63; The planetary gear 641 meshed with the sun gear 613 in the sun gear sleeve 61 drives the polishing disc 65 to revolve around the driven shaft 5; the polishing disc 65 rotates around its central axis while revolving;

At the same time, the driving shaft 3 drives the sun gear sleeve 61 to rotate through the second transmission mechanism 7, and the sun gear sleeve 61 rotates around its central axis through the mutually meshing sun gear 613 and the planetary gear 641; the sun gear sleeve 61 rotates while pushing The planetary wheel 641 rotates.

During polishing, the eccentricity of the polishing disk can be adjusted by replacing the planetary wheels 641 with different numbers of teeth and adjusting the position of the hollow slider on the turntable 62 .

It is also possible to adjust the rotational speed ratio of the polishing disc 65 by changing the number of teeth of the pulleys in the first transmission mechanism 4 and the second transmission mechanism 7 .

Compressed air can also be supplied to the cylinder through the upper rotary joint 51 , the central hole of the driven shaft 5 and the lower rotary joint 642 to control the polishing pressure of the polishing disc 65 .

Embodiment 3

As shown in FIG. 1 and FIG. 6 , this embodiment provides a planetary polishing device, including a mounting seat 1, a driving motor 2, a driving shaft 3, a first transmission mechanism 4, a second transmission mechanism 7, a driven shaft 5 and a sun Wheel assembly 6.

The mounting base 1 includes a base 11 and a support shell 12 fixed on the upper surface of the base 11 . The base 11 defines a first mounting hole and a second mounting hole, and the top of the support shell 12 defines a third mounting hole. The drive motor 2 is installed in the third installation hole of the support shell 12 , the driving shaft 3 is installed in the first installation hole through a bearing; the driven shaft 5 is arranged parallel to the driving shaft 3 in the installation seat 1 at intervals.

The sun gear assembly 6 includes a sun gear sleeve 61, a turntable 62, a hollow slider 63, a transition piece 64 and a polishing disc 65; the sun gear sleeve 61 is a convex connecting sleeve with openings up and down, and its small end is installed in the installation through a rolling bearing. In the second mounting hole of the base 1 , the big end is located outside the mounting base 1 .

The output shaft of the drive motor 2 is connected with the driving shaft 3 through a coupling; the driving shaft 3 is connected with the driven shaft 5 through the first transmission mechanism 4 , and is connected with the sun gear sleeve 61 through the second transmission mechanism 7 . The first transmission mechanism 4 includes a small driving pulley 41 arranged on the driving shaft 3, a large driven pulley 43 arranged on the driven shaft 5, and a first toothed belt 42 connecting the driving pulley and the driven pulley . The second transmission mechanism 7 includes a large driving pulley 71 disposed on the driving shaft 3, a pulley seat 74 that is sleeved on the driven shaft 5 and is fixedly connected with the sun gear sleeve 61, and a small driven pulley installed on the pulley seat. The pulley 73 and the second toothed belt 72 connecting the driving large pulley 71 and the driven small pulley 73 .

As shown in FIG. 2 , a through hole 621 with a square cross-section is provided on the axis of the turntable 62, and a T-shaped groove 622 transversely penetrating the turntable 62 is provided at the bottom; the upper end of the hollow slider 63 is provided with a T-shaped groove 622. The upper end of the card slot (see FIG. 3 ) is installed on the T-shaped slot 622 of the turntable 62 , and the hollow slider 63 can move along the T-shaped slot 622 .

The driven shaft 5 passes through the sun gear sleeve 61 through the bearing, and the shape of one end connected with the turntable 62 matches the shape of the through hole 621; the end extends into the large end through the small end of the sun gear sleeve 61, and is inserted In the square through hole 621, the driven shaft 5 can drive the turntable 62 arranged in the large end of the sun gear sleeve 61 to rotate; the end of the driven shaft 5 can also be interfered with the through hole 621 or welded in other ways. Fixed connection. Compared with the fixed connection method, the plug connection is more convenient for the disassembly and replacement of the turntable 62 .

The inner wall of the big end of the sun gear sleeve 61 is provided with a turntable bearing 611, and the inner ring of the turntable bearing 611 is sleeved on the outer surface of the turntable 62;

The inner wall of the big end of the sun gear sleeve 61 is fixedly installed with a sun gear 613 with internal teeth; between the turntable bearing 611 and the sun gear 613, a pressure ring 612 for pressing the turntable bearing 611 is provided, and the outer wall of the pressure ring 612 is connected to the sun gear. The inner wall of the big end of the sleeve 61 is tightly fitted. The rotation of the turntable 62 can be made more stable by the turntable bearing 611 and the flange.

The upper part of the transition piece 64 is installed in the hollow slider 63 through a rolling bearing; the polishing disc 65 is spherically connected with the transition piece 64; the lower part of the transition piece 64 protrudes from the hollow slide block 63, and its outer circumference is fixedly sleeved with the sun gear 613 The meshing planet gears 641 .

The working process of this embodiment:

During the polishing operation, the driving motor 2 drives the driving shaft 3 to rotate.

The driving shaft 3 rotates the driven shaft 5 through the first transmission mechanism 4, the driven shaft 5 drives the turntable 62 to rotate, and the turntable 62 makes the transition connecting piece 64 revolve around the driven shaft 5 through the hollow slider 63; The planetary gear 641 meshed with the sun gear 613 in the sun gear sleeve 61 drives the polishing disc 65 to revolve around the driven shaft 5; the polishing disc 65 rotates around its central axis while revolving;

At the same time, the driving shaft 3 drives the sun gear sleeve 61 to rotate through the second transmission mechanism 7, and the sun gear sleeve 61 rotates around its central axis through the mutually meshing sun gear 613 and the planetary gear 641; the sun gear sleeve 61 rotates while pushing The planetary wheel 641 rotates.

During polishing, the eccentricity of the polishing disk can be adjusted by replacing the planetary wheels 641 with different numbers of teeth and adjusting the position of the hollow slider on the turntable 62 .

It is also possible to adjust the rotational speed ratio of the polishing disc 65 by changing the number of teeth of the pulleys in the first transmission mechanism 4 and the second transmission mechanism 7 .

Embodiment 4

As shown in FIG. 1 and FIG. 7 , this embodiment provides a planetary polishing device, including a mounting seat 1, a driving motor 2, a driving shaft 3, a first transmission mechanism 4, a second transmission mechanism 7, a driven shaft 5 and a sun Wheel assembly 6. The driven shaft 5 is a hollow stepped shaft, and a rotary joint 51 is mounted on the upper end of the driven shaft 5 .

The mounting base 1 includes a base 11 and a support shell 12 fixed on the upper surface of the base 11 . The base 11 defines a first mounting hole and a second mounting hole, and the top of the support shell 12 defines a third mounting hole. The drive motor 2 is installed in the third installation hole of the support shell 12 , the driving shaft 3 is installed in the first installation hole through a bearing; the driven shaft 5 is arranged parallel to the driving shaft 3 in the installation seat 1 at intervals.

The sun gear assembly 6 includes a sun gear sleeve 61, a turntable 62, a hollow slider 63, a transition piece 64 and a polishing disc 65; the sun gear sleeve 61 is a convex connecting sleeve with openings up and down, and its small end is installed in the installation through a rolling bearing. In the second mounting hole of the base 1 , the big end is located outside the mounting base 1 . The transition piece 64 is a cylinder, and a lower rotary joint 642 is installed on the air inlet at the upper end of the cylinder, and the lower rotary joint 642 communicates with the lower end of the hollow driven shaft 5 through a pipeline.

The output shaft of the drive motor 2 is connected with the driving shaft 3 through a coupling; the driving shaft 3 is connected with the driven shaft 5 through the first transmission mechanism 4 , and is connected with the sun gear sleeve 61 through the second transmission mechanism 7 . The first transmission mechanism 4 includes a small driving pulley 41 arranged on the driving shaft 3, a large driven pulley 43 arranged on the driven shaft 5, and a first toothed belt 42 connecting the driving pulley and the driven pulley . The second transmission mechanism 7 includes a large driving pulley 71 arranged on the driving shaft 3, a pulley seat 74 sleeved on the driven shaft 5 and fixedly connected with the sun gear sleeve 61, and a small driven pulley mounted on the pulley seat. The pulley 73 and the second toothed belt 72 connecting the driving large pulley 71 and the driven small pulley 73 .

As shown in FIG. 2 , a through hole 621 with a square cross-section is provided on the axis of the turntable 62, and a T-shaped groove 622 transversely penetrating the turntable 62 is provided at the bottom; the upper end of the hollow slider 63 is provided with a T-shaped groove 622. The upper end of the card slot (see FIG. 3 ) is installed on the T-shaped slot 622 of the turntable 62 , and the hollow slider 63 can move along the T-shaped slot 622 .

The driven shaft 5 passes through the sun gear sleeve 61 through a bearing, and the shape of one end connected with the turntable 62 matches the shape of the through hole 621; the end extends into the large end through the small end of the sun gear sleeve 61, and is inserted In the square through hole 621, the driven shaft 5 can drive the turntable 62 arranged in the large end of the sun gear sleeve 61 to rotate; the end of the driven shaft 5 can also be interfered with the through hole 621 or welded in other ways. Fixed connection. Compared with the fixed connection method, the plug connection is more convenient for the disassembly and replacement of the turntable 62 .

The inner wall of the big end of the sun gear sleeve 61 is provided with a turntable bearing 611, and the inner ring of the turntable bearing 611 is sleeved on the outer surface of the turntable 62; The rotation of the turntable 62 can be made more stable by the turntable bearing 611 and the flange.

The inner wall of the big end of the sun gear sleeve 61 is fixedly installed with a sun gear 613 with internal teeth; between the turntable bearing 611 and the sun gear 613, a pressure ring 612 for pressing the turntable bearing 611 is provided, and the outer wall of the pressure ring 612 is connected to the sun gear. The inner wall of the big end of the sleeve 61 is tightly fitted.

The upper part of the transition piece 64 is installed in the hollow slider 63 through a rolling bearing; the polishing disc 65 is spherically connected with the transition piece 64; the lower part of the transition piece 64 protrudes from the hollow slide block 63, and its outer circumference is fixedly sleeved with the sun gear 613 The meshing planetary gears 641 .

The working process of this embodiment:

During the polishing operation, the driving motor 2 drives the driving shaft 3 to rotate.

The driving shaft 3 rotates the driven shaft 5 through the first transmission mechanism 4, the driven shaft 5 drives the turntable 62 to rotate, and the turntable 62 makes the transition connecting piece 64 revolve around the driven shaft 5 through the hollow slider 63; The planetary gear 641 meshed with the sun gear 613 in the sun gear sleeve 61 drives the polishing disc 65 to revolve around the driven shaft 5; the polishing disc 65 rotates around its central axis while revolving;

At the same time, the driving shaft 3 drives the sun gear sleeve 61 to rotate through the second transmission mechanism 7, and the sun gear sleeve 61 rotates around its central axis through the mutually meshing sun gear 613 and the planetary gear 641; the sun gear sleeve 61 rotates while pushing The planetary wheel 641 rotates.

During polishing, the eccentricity of the polishing disk can be adjusted by replacing the planetary wheels 641 with different numbers of teeth and adjusting the position of the hollow slider on the turntable 62 .

It is also possible to adjust the rotational speed ratio of the polishing disc 65 by changing the number of teeth of the pulleys in the first transmission mechanism 4 and the second transmission mechanism 7 .

Compressed air can also be supplied to the cylinder through the upper rotary joint 51 , the central hole of the driven shaft 5 and the lower rotary joint 642 to control the polishing pressure of the polishing disc 65 .

The above only describes the preferred embodiments of the present invention, and does not limit the technical solutions of the present invention to this. Any known deformations made by those skilled in the art on the basis of the main technical concept of the present invention belong to the protection of the present invention. technical category.

Claims (10)

1. A planetary polishing device, characterized in that: it comprises a mounting seat (1) and a drive motor (2), a driving shaft (3), a driven shaft (5) and a sun gear assembly arranged on the mounting seat (1) (6); The sun gear assembly (6) includes a sun gear sleeve (61), a turntable (62), a hollow slider (63), a transition piece (64) and a polishing disc (65); The sun gear sleeve (61) is a convex-shaped connecting sleeve with openings up and down, the small end of which is rotatably arranged at the lower part of the mounting seat (1), and the large end is located outside the mounting seat (1); The output shaft of the drive motor (2) is connected with the driving shaft (3); the driving shaft (3) is connected with the driven shaft (5) through the first transmission mechanism (4); the driving shaft (3) is connected with the driven shaft (5) through the second transmission mechanism (7) ) is connected with the sun gear cover (61); The shaft center of the turntable (62) is provided with a through hole (621), and the lower part is provided with a T-shaped groove (622) transversely passing through the turntable (62); The upper end of the hollow slider (63) is provided with a card slot adapted to the T-shaped groove (622), and the upper end of the hollow slider (63) is snapped into the T-shaped groove (622) and can move along the T-shaped groove (622); The driven shaft (5) is passed through the sun gear sleeve (61), and one end of the driven shaft (5) extends into the large end through the small end of the sun gear sleeve (61), and passes through the through hole (621) and is connected to the sun gear sleeve (61). 61) The turntable (62) in the big end is connected; The inner wall of the big end of the sun gear sleeve (61) is fixedly mounted with a sun gear (613) with internal teeth; The upper part of the transition piece (64) is rotatably installed in the hollow slider (63), the polishing disc (65) is connected with the transition piece (64); the lower part of the transition piece (64) protrudes from the hollow slide (63) ), the outer circumference of which is fixedly sleeved with the planetary gear (641) engaged with the sun gear (613). 2. A planetary polishing device according to claim 1, characterized in that: the cross-section of the through hole (621) is a polygon; the shape of one end of the driven shaft (5) connected to the turntable (62) is the same as the The shape of the through hole (621) is matched; A turntable bearing (611) is arranged on the inner wall of the big end of the sun gear sleeve (61), and the inner ring of the turntable bearing (611) is sleeved on the outer surface of the turntable (62); A pressure ring (612) for pressing the turntable bearing (611) is further provided between the turntable bearing (611) and the sun gear (613), the outer wall of the pressure ring (612) and the big end of the sun gear sleeve (61) The inner walls fit tightly. 3. A planetary polishing device according to claim 2, wherein the transition piece is hinged with the polishing disc (65). 4. A planetary polishing device according to claim 1, 2 or 3, characterized in that: the driven shaft (5) is a hollow stepped shaft, and a rotary joint (51) is installed on its upper end; The transition piece (64) is a cylinder, the air inlet at the upper end of the cylinder is installed with a lower rotary joint (642), and the lower rotary joint (642) communicates with the lower end of the hollow driven shaft (5) through a pipeline. 5. A planetary polishing device according to claim 4, characterized in that: the upper end of the outer circumference of the turntable (62) is provided with a flange for axial positioning of the turntable (62). 6. a kind of planetary polishing device according to claim 5 is characterized in that: The first transmission mechanism (4) is a gear transmission mechanism or a belt transmission mechanism or a chain transmission mechanism; The second transmission mechanism (7) is a gear transmission mechanism or a belt transmission mechanism or a chain transmission mechanism. 7. A planetary polishing device according to claim 6, characterized in that: the first transmission mechanism (4) comprises a small driving pulley (41) arranged on the driving shaft (3), a small driving pulley (41) arranged on the driven shaft (3) The driven large pulley (43) on the shaft (5) and the first toothed belt (42) connecting the driving small pulley (41) and the driven large pulley (43). 8 . The planetary polishing device according to claim 7 , wherein the second transmission mechanism ( 7 ) comprises a large driving pulley ( 71 ) arranged on the driving shaft ( 3 ), and is sleeved on the driven shaft ( 3 ). A pulley seat (74) on the shaft (5) and fixedly connected with the sun gear sleeve (61), a driven small pulley (73) installed on the pulley seat, and connecting the driving large pulley (71) and the driven pulley The second toothed belt (72) of the small pulley (73). 9. A planetary polishing device according to claim 8, characterized in that: the driving shaft (3) and the driven shaft (5) are arranged parallel to each other and spaced apart; the mounting seat (1) comprises a base ( 11) and the support shell (12) fixed on the upper surface of the base (11), the base (11) is provided with a first mounting hole for mounting the driving shaft (3) and a second mounting hole for mounting the sun gear sleeve (61). Two installation holes, the top of the support shell (12) is provided with a third installation hole for installing the drive motor (2). 10. A planetary polishing device according to claim 9, characterized in that: the upper part of the transition piece (64) is installed in the hollow slider (63) through a rolling bearing or a sliding bearing; The small end of the sun gear sleeve (61) is installed in the second installation hole through a rolling bearing or a sliding bearing.