CN109664178B - Polishing mechanism with variable eccentricity value and variable transmission ratio through eccentric adjustment block - Google Patents

Abstract

The invention discloses a polishing mechanism capable of changing the eccentric value through an eccentric adjusting block and having a variable transmission ratio. The first, second and third shafts are rotatably connected between them, the upper end of the first pulley is connected to the lower worktable, the eccentric adjustment block is fixed on the side of the lower worktable and the upper worktable, the upper end of the upper worktable is connected to the reducer, and the upper The servo motor is fixed, the top surface of the casing is fixed with an end cover, the connecting flange is fixed on the end cover, the first rotating shaft is fixed with a pulley, an overrunning clutch and a gear, the second rotating shaft is fixed with two gears, and the third rotating shaft is from bottom to top Two gears are fixed, the ball spline nut is fixed on the inner bottom of the base, the pulley and the gear are fixed on the ball spline nut, the cylinder connecting piece is fixed in the base, and the low friction cylinder is fixed on the cylinder connecting piece. The use of this structure can greatly improve the work efficiency and is suitable for actual production use.

Description

Polishing mechanism with variable eccentricity value and variable transmission ratio through eccentric adjustment block

technical field

The invention relates to the technical field of robotics, in particular to a polishing mechanism with an eccentricity adjustment block to change the eccentricity value and a variable transmission ratio.

Background technique

With the advancement of science and technology and economic development, the demand for aspherical optical components, especially large-diameter aspherical high-precision optical components, is increasing day by day. However, most of the existing polishing mechanisms have low precision and unstable dynamic performance, making it difficult to meet the requirements of optical components. Ultra-precision machining requirements, and the polishing range and speed are not adjustable during the polishing process. Centering on the society's requirements for high-efficiency, high-reliability, and engineering processing of aspherical components, the present invention conducts an optimization study on a large-diameter aspherical robot numerical control polishing mechanism.

The Chinese Patent Application No. 201410695226.8 discloses "a feed-type eccentric adjustable automatic polishing device", which includes a support mechanism, a feeding mechanism and an eccentric adjustable polishing mechanism. The overall structure is exposed, and a large amount of dust generated during the polishing operation will have a great impact on the operation of the mechanism. At the same time, the entire mechanism is driven by three motors, which has a low degree of modularity and a low degree of compact structure, and the eccentricity cannot be adjusted at a fixed value.

The Chinese patent with the application number 201810233223.0 discloses "a lens polishing machine". The device includes a machine tool, a working chamber, a shaft seat, a grinding head and other structures, and a pressure sensor system at the same time. The structure is complex, and the polishing liquid nozzle and the grinding head are separated and integrated. At the same time, the radius of the lens that can be processed is too small, and the method of using the thimble to press the lens against the grinding head for processing cannot meet the accuracy requirements of slightly high-precision optical equipment.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a polishing mechanism that can change the eccentricity value through the eccentric adjustment block and has a variable transmission ratio. The need for high-precision machining of large-diameter aspherical components.

The technical scheme of the present invention is:

The polishing mechanism with eccentric value changed by eccentric adjustment block and variable transmission ratio includes a cylindrical casing, a casing top cover is installed on the top of the casing, and two guide rails are longitudinally opened on the inner bottom wall of the casing for installation A slot, a longitudinal guide slider structure is installed in the guide rail installation groove, a connecting plate is fixed on the slider of the longitudinal guide slider structure, and a transverse guide slider structure is installed on the connecting plate , the guide rails of the longitudinal guide rail slider structure and the guide rails of the lateral guide rail slider structure are placed perpendicular to each other, and two arc-shaped installation grooves are opened on the side wall of the casing along the circumferential direction of the casing, and the left end of the base passes through the two The arc-shaped installation groove is placed and the bottom wall of the base is fixedly connected with the slider of the lateral guide slider structure, and a base top cover is fixed on the top surface of the exposed shell part of the base;

An L-shaped connecting flange is fixed on the top cover of the casing, a center hole for connecting with the end of the hybrid robot is opened on the vertical surface of the connecting flange, and a horizontal surface of the connecting flange is fixed in the middle a servo motor, the rotating shaft of the servo motor is arranged in the vertical direction and is fixedly connected with the input shaft of the reducer;

The reducer is fixedly connected with the top cover of the casing by screws, the bottom surface of the end of the reducer is fixedly connected with the counterweight flywheel by screws, the bottom end of the counterweight flywheel is fixed in the middle of the upper worktable, and the lower worktable is connected to the The upper worktable can be relatively slidably connected through the dovetail groove structure, the vertical section of an L-shaped eccentric adjustment block is arranged in close contact with the side wall of the upper worktable, and the end of the horizontal section of the L-shaped eccentric adjustment block is connected to the top of the side wall of the lower worktable. The tight setting makes the upper and lower worktables staggered by a set distance, the horizontal section of the L-shaped eccentric adjustment block is fixedly connected to the lower worktable, and the vertical section of the L-shaped eccentric adjustment block is fixedly connected to the upper worktable;

The top boss of the first pulley is installed in the middle groove of the bottom of the lower table and is fixedly connected by screws, and the lower end of the axle of the first pulley is installed on the base through a bearing;

The first pulley is connected with the second pulley through the first synchronous toothed belt;

Between the bottom plate of the base and the top cover of the base, a first rotating shaft, a second rotating shaft and a third rotating shaft are installed to rotate left and right along the longitudinal direction of the base. The upper and lower sides of the first rotating shaft, second rotating shaft and third rotating shaft The ends are rotatably connected with the bottom plate of the base and the top cover of the base through bearings;

A second pulley, a lower overrunning clutch and an upper overrunning clutch are sequentially fixed on the first rotating shaft from bottom to top, the first gear is fixed on the outer ring of the upper overrunning clutch, and the upper overrunning clutch is installed on the first overrunning clutch. The sleeve on the rotating shaft is separated from the lower overrunning clutch, and the connection direction of the lower overrunning clutch and the third pulley is opposite to the connection direction of the upper overrunning clutch and the first gear, so that when the first rotating shaft rotates, the upper overrunning clutch is connected. The state of engagement or disengagement of the overrunning clutch and the first gear is opposite to the state of engagement or disengagement of the lower overrunning clutch and the third pulley.

A third gear and a second gear are respectively connected to the lower part and the upper part of the second rotating shaft through keys, and the bearing at the bottom of the second rotating shaft and the third gear are separated by a bushing installed on the second rotating shaft. The third gear and the second gear are separated by a shaft sleeve installed on the second rotating shaft, and the first gear and the second gear are meshed and matched;

The fourth gear is installed on the shoulder of the lower end of the third shaft through a key, the fourth gear is meshed with the third gear, and the upper end face of the fourth gear is separated from the fifth gear installed at the upper end of the third shaft through a shaft sleeve, so the fifth gear is connected with the third shaft through a key;

The sixth gear meshes with the fifth gear, and the fourth pulley and the third pulley are connected by a second synchronous toothed belt;

The sixth gear and the fourth pulley are fixed on the spline nut of the rotary ball spline through long screws, and the spline nut is fixed on the base through the flange outer ring. The spline shaft of the key is engaged with the spline nut, the base connecting piece is fixed on the base with screws, the top surface of the base connecting piece is connected with the low-friction cylinder through the boss, and the output of the low-friction cylinder is The shaft is fixedly connected with the upper end of the spline shaft, so that the actuator connected to the end of the spline shaft can move up and down within a certain stroke.

The advantage of the present invention is that the polishing mechanism adjusts the eccentric distance of the upper and lower worktables through different eccentric adjustment blocks, so that the eccentricity of the entire polishing process can be fixed and adjustable. The tensioning mechanism of the synchronous toothed belt is designed to push the tension block to the proper position through the jacking wire, and tighten and fix it with two nuts. The jacking wire and the nut are adjustable from the outside at any time, and the space utilization is more reasonable. The mechanism adopts an overrunning clutch, which realizes the work and disconnection of different transmission routes through the forward and reverse rotation of the motor and the forward and reverse installation of the overrunning clutch on the shaft. The number of gears and pulley teeth on the transmission route is allocated according to actual needs, without disassembly and modification. The structure can realize different transmission ratio transmission. The design is simple and reliable, and at the same time, the work efficiency is greatly improved, and it is suitable for actual production use.

A rotary joint is designed at the injection point of the polishing liquid, which increases the diameter of the inlet of the polishing liquid. At the same time, it is easy to replace after wear and tear, and it is not necessary to disassemble the cylinder to replace the inner steel pipe of the cylinder rod.

The counterweight flywheel and the base are designed with a hollow lead block structure, and a reasonable weight is placed through the dynamic balance and static balance calculation, so that the overall movement of the polishing mechanism is stable and high processing accuracy is guaranteed.

Description of drawings

1 is an exploded schematic view of the internal structure of the polishing mechanism described in this embodiment;

FIG. 2 is a schematic bottom view of the top cover of the polishing mechanism according to the present embodiment;

Fig. 3 is the assembly schematic diagram of the base and the cross guide rail of the polishing mechanism described in this embodiment;

4 is an exploded schematic view of the transmission structure of the polishing mechanism described in this embodiment;

5 is a schematic top view of the assembly of the casing of the polishing mechanism and the cross guide rail according to the present embodiment;

6 is a schematic diagram of the overall assembly of the polishing mechanism described in the present embodiment removing the casing, the top cover of the base, and the connecting flange;

FIG. 7 is a schematic assembly diagram of the eccentric adjustment structure of the polishing mechanism according to the present embodiment;

FIG. 8 is a schematic diagram of the overall assembly of the polishing mechanism according to this embodiment.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific installation working methods. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in the accompanying drawings, the polishing mechanism of the present invention, which can change the eccentric value through the eccentric adjustment block and has a variable transmission ratio, includes a cylindrical casing 35, and a casing top cover 33 is installed on the top of the casing. Two guide rail installation grooves are opened on the bottom wall along the longitudinal direction, and a longitudinal guide rail slider structure is installed in the guide rail installation groove, and a connecting plate 11 is fixed on the slider of the longitudinal guide rail slider structure. The connecting plate 11 is provided with a transverse guide block structure, and the guide rail of the longitudinal guide block structure and the guide rail 10 of the transverse guide block structure are placed perpendicular to each other, and are oppositely spaced on the side wall of the casing 35 along the circumferential direction of the casing. There are two arc-shaped installation grooves, the left end of the base 34 is placed through the two arc-shaped installation grooves, and the bottom wall of the base 34 is fixedly connected to the slider 9 of the lateral guide slider structure. A base top cover 36 is fixed on the top surface of the portion of the base 34 exposed to the casing 35 .

An L-shaped connecting flange 32 is fixed on the casing top cover 33 , and a central hole for connecting with the end of the hybrid robot is opened on the vertical surface of the connecting flange 32 . The robot can move in a certain space with a polishing mechanism. A servo motor 1 is fixed in the middle of the horizontal plane of the connecting flange 32. The rotating shaft of the servo motor 1 is arranged in the vertical direction and is connected with the input shaft of the reducer 2. Coaxial fixed connection.

Preferably, the reducer adopts a precision planetary gear reducer, which has the advantages of small size, light weight, high bearing capacity, long service life, stable operation, low noise, large output torque, large speed ratio, high efficiency and safe performance. specialty. It has the characteristics of power splitting and multi-tooth meshing.

The reducer 2 is fixedly connected with the casing top cover 33 by screws, the bottom surface of the end of the reducer 2 is fixedly connected with the counterweight flywheel 3 by screws, and the bottom end of the counterweight flywheel 3 is fixed in the middle of the upper workbench 4, The lower worktable 6 and the upper worktable 4 can be relatively slidably connected through a dovetail groove structure, the vertical section of an L-shaped eccentric adjustment block 5 is closely arranged with the side wall of the upper worktable, and the horizontal section of the L-shaped eccentric adjustment block 5 is arranged. The upper and lower worktables are staggered by a set distance, and the horizontal section of the L-shaped eccentric adjustment block 5 is fixedly connected with the lower worktable. The L-shaped eccentric adjustment block The vertical section of 5 is fixedly connected with the upper workbench. The length of the horizontal section in contact with the lower end of the different eccentric adjustment blocks is different. According to the actual production needs, replace the eccentric adjustment block with the corresponding eccentric adjustment block and then fix it with the upper and lower worktables through screws. Top open a fixed distance, so that the eccentric distance of the polishing process can be fixed and adjustable.

The top boss of the first pulley 7 is installed in the middle groove of the bottom of the lower table 6 and is fixedly connected by screws, and the lower end of the axle of the first pulley 7 is installed on the base 34 through a bearing.

The first pulley 7 is connected with the second pulley 17 through the first synchronous toothed belt 8 .

A first rotating shaft 12 , a second rotating shaft 18 and a third rotating shaft 21 are installed between the bottom plate of the base 34 and the top cover of the base along the longitudinal direction of the base at intervals left and right. The first rotating shaft 12 and the second rotating shaft 18 And the upper and lower ends of the third rotating shaft 21 are respectively rotatably connected with the bottom plate of the base and the top cover of the base through bearings.

A second pulley 17, a lower overrunning clutch 14-1 and an upper overrunning clutch 14-2 are sequentially fixed on the first rotating shaft 12 from bottom to top, and the third pulley 16 is fixed on the lower overrunning clutch 14- 1. On the outer ring, the first gear 15 is fixed on the outer ring of the upper overrunning clutch 14-2, and the upper overrunning clutch 14-2 is separated from the lower overrunning clutch 14-1 by a sleeve installed on the first rotating shaft 12 . The connection direction of the lower overrunning clutch and the third pulley 16 is opposite to the connection direction of the upper overrunning clutch and the first gear 15, so that when the first shaft 12 rotates, the upper overrunning clutch and the first gear are engaged or disconnected. The open state is opposite to the state in which the lower overrunning clutch and the third pulley 16 are engaged or disengaged.

The preferred upper overrunning clutch (available in the market) and the lower overrunning clutch both use sprag type overrunning clutch. The sprag type overrunning clutch is a device with self-clutching function by utilizing the change of the rotational direction of the main and driven parts. Both the overrunning clutch and the wedge-type lower overrunning clutch are connected with the first rotating shaft 12 through keys. The third pulley 16 and the wedge-type lower overrunning clutch are connected by the wedge block 13 arranged in the opposite groove of the two, and the first gear 15 and the wedge-type upper overrunning clutch are also connected by the wedge block 13. The wedge blocks 13 in the oppositely arranged grooves are connected. When the connection direction of the wedge-type lower overrunning clutch and the third pulley 16 is opposite to the connection direction of the wedge-type upper overrunning clutch and the first gear 15 to rotate the first shaft 12, the wedge-type upper overrunning clutch and the first gear 15 are connected in the opposite direction. The state of engagement or disengagement of the first gear is opposite to the state of engagement or disengagement of the sprag-type lower overrunning clutch and the third pulley 16 . Thereby, the two transmission routes transmitted by the upper first gear 15 and the lower third pulley 16 are activated or disconnected, and the variable transmission ratio of the mechanism is realized. Of course, the overrunning clutch can also use a ball clutch or the like.

A third gear 20 and a second gear 19 are respectively connected to the lower part and the upper part of the second rotating shaft through keys, and the bearing at the bottom of the second rotating shaft and the third gear 20 are separated by a bushing installed on the second rotating shaft , the third gear 20 and the second gear 19 are separated by a shaft sleeve installed on the second rotating shaft. The first gear 15 and the second gear 19 are engaged with each other.

The fourth gear 22 is installed on the shoulder of the lower end of the third shaft 21 through a key, the fourth gear 22 is meshed with the third gear 20, and the upper end surface of the fourth gear 22 is installed on the upper end of the third shaft 21 through the shaft sleeve 23 The fifth gear 24 is separated from each other, and the fifth gear 24 is connected with the third rotating shaft 21 through a key.

The sixth gear 25 meshes with the fifth gear 24 , and the fourth pulley 26 and the third pulley 16 are connected by a second synchronous toothed belt 27 .

The sixth gear 25 and the fourth pulley 26 are fixed on the spline nut 31 of the rotating ball spline by long screws. The spline nut 31 is fixed on the base 34 through the outer ring of the flange. The spline shaft 30 of the rotating ball spline arranged in the vertical direction is engaged with the spline nut 31 . The working principle of the rotary ball spline is to rotate the spline nut 31 engaged with the spline shaft 30, so that the spline shaft 30 rotates, and the end of the spline shaft 30 is used to connect the actuator, so that the end of the spline shaft 30 is connected The polishing disc and other actuators perform rotary motion, and the advantages are zero clearance in the direction of rotation and high positioning accuracy. Adapt to high-speed movement, smooth operation, low working noise, easy installation and space saving.

The base connector 29 is fixed on the base 34 by screws, and the top surface of the base connector 29 is connected to the low-friction cylinder 28 through a boss. The low-friction cylinder is available in the market and has a mature internal structure. Its working principle is: Through the intake and exhaust of the upper and lower air inlets, the internal structure is pushed up and down within the stroke. It has the characteristics of small sliding resistance and stable movement, and can maintain a certain output force at the same time. It is especially suitable for grinding and polishing lenses, glass, etc. occasion. The output shaft of the low-friction cylinder 28 is fixedly connected to the upper end of the spline shaft 30, so that the actuator connected to the end of the spline shaft 30 can move up and down within a certain stroke.

The preferred counterweight flywheel 3 of the present invention is in the shape of a semi-disc, and the interior is hollowed out to place lead blocks, which has a simple structure and saves space at the same time.

The working process of the polishing mechanism of the present invention is as follows: the entire polishing mechanism is driven by a servo motor, the servo motor outputs torque, and the torque is transmitted to the counterweight flywheel through the deceleration of the reducer, and the upper worktable is fixedly connected to the counterweight flywheel and synchronized. rotate. The first pulley 7 is fixed in the central groove of the lower table 6, and the fixed eccentricity is realized through different eccentric adjustment blocks 5. The first pulley 7 is installed on the base 34, and the entire base and the end polishing head are installed on the casing 35. The cross guide rail and the guide rail slider on the bottom surface realize the translation on the plane. The first pulley 7 realizes the transmission of the set transmission ratio through the synchronous belt. The pulley and the gear on the first shaft 12 are respectively equipped with an overrunning clutch forward and reverse. The flywheel, the upper and lower worktables, the first pulley 7, the first synchronous toothed belt 8, the second pulley 17 and the key are transmitted to the first shaft 12, the first gear 15 is disconnected under the action of the overrunning clutch, and the third pulley 16 meshes and rotates, transmits torque to the end pulley through the second synchronous belt 27, the end spline rotates and realizes a transmission ratio transmission, when the motor reverses, the pulley is disconnected under the action of the overrunning clutch, and the gear meshes and rotates to The lower stage transmits the torque, drives the spline to rotate, and realizes the transmission of another transmission ratio.

In the actual installation and use process, the counterweight flywheel and the upper worktable are installed to the end of the reducer through screws from bottom to top, the lower worktable and the first pulley 7 are also assembled from bottom to top by screws, and finally the eccentric adjustment block The two mechanisms are fixedly connected. After the shafts, gears and pulleys in the base are assembled, they are put into the casing, and the base is fixed with the guide rail slider. Finally, the pre-installed synchronous toothed belt, the assembled pulley, the upper and lower worktables, and the counterweight flywheel are assembled. , the reducer and servo motor are placed on the base.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, all It should be considered as the range described in this specification.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the specific embodiments described, which are only illustrative and not restrictive, and are not limited in the art. Under the inspiration of the present invention, those of ordinary skill can also make some modifications and improvements without departing from the scope of the present invention and the protection scope of the claims, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims (4)

1. Through the changeable polishing mechanism of eccentric value of eccentric regulating block change and drive ratio, its characterized in that: comprises a cylindrical shell (35), a shell top cover (33) is arranged at the top of the shell, two guide rail installation grooves are longitudinally arranged on the inner bottom wall of the shell, a longitudinal guide rail sliding block structure is arranged in the guide rail installation grooves, a connecting plate (11) is fixed on the sliding block of the longitudinal guide rail sliding block structure, a transverse guide rail sliding block structure is arranged on the connecting plate, the guide rail of the longitudinal guide rail sliding block structure and the guide rail (10) of the transverse guide rail sliding block structure are arranged vertically, two arc-shaped mounting grooves are oppositely formed in the side wall of the shell (35) along the circumferential direction of the shell, the left end of the base (34) penetrates through the two arc-shaped mounting grooves to be placed, the bottom wall of the base (34) is fixedly connected with the sliding block (9) of the transverse guide rail sliding block structure, a base top cover (36) is fixed on the top surface of the part of the base exposed out of the shell (35);

an L-shaped connecting flange (32) is fixed on the top cover (33) of the shell, a central hole for connecting the tail end of the hybrid robot is formed in the vertical surface of the connecting flange, a servo motor (1) is fixed in the middle of the horizontal plane of the connecting flange, and the rotating shaft of the servo motor is arranged in the vertical direction and is fixedly connected with the input shaft of the speed reducer (2) coaxially;

the speed reducer (2) is fixedly connected with a top cover (33) of the shell through screws, the bottom surface of the tail end of the speed reducer (2) is fixedly connected with a counterweight flywheel (3) through screws, the bottom end of the counterweight flywheel (3) is fixed in the middle of an upper workbench (4), a lower workbench (6) is connected with the upper workbench in a sliding mode through a dovetail groove structure, the vertical section of an L-shaped eccentric adjusting block (5) is tightly attached to the side wall of the upper workbench, the end part of the horizontal section of the L-shaped eccentric adjusting block is tightly attached to the side wall of the lower workbench, so that the upper workbench and the lower workbench are staggered by a set distance, the horizontal section of the L-shaped eccentric adjusting block is fixedly connected with the lower workbench, and the vertical section of the L-shaped eccentric adjusting block (5) is fixedly connected with the upper workbench;

a top boss of a first belt wheel (7) is arranged in a groove in the middle of the bottom of the lower workbench (6) and is fixedly connected with the groove through a screw, and the lower end of a wheel shaft of the first belt wheel is arranged on a base (34) through a bearing;

the first belt wheel (7) is connected with the second belt wheel (17) through a first synchronous toothed belt (8);

a first rotating shaft (12), a second rotating shaft (18) and a third rotating shaft (21) are sequentially and rotatably arranged between the bottom plate of the base (34) and the top cover of the base at intervals from left to right along the longitudinal direction of the base, and the upper ends and the lower ends of the second rotating shaft and the third rotating shaft of the first rotating shaft are respectively and rotatably connected with the bottom plate of the base and the top cover of the base through bearings;

a second belt wheel (17), a lower overtaking clutch (14-1) and an upper overtaking clutch (14-2) are sequentially fixed on the first rotating shaft (12) from bottom to top, a third belt wheel (16) is fixed on an outer ring of the lower overtaking clutch, a first gear (15) is fixed on the outer ring of the upper overtaking clutch, the upper overtaking clutch is separated from the lower overtaking clutch through a sleeve arranged on the first rotating shaft (12), the connecting direction of the lower overtaking clutch and the third belt wheel is opposite to the connecting direction of the upper overtaking clutch and the first gear so that when the first rotating shaft rotates, the state of connection or disconnection of the upper overtaking clutch and the first gear is opposite to the state of connection or disconnection of the lower overtaking clutch and the third belt wheel;

the lower part and the upper part of the second rotating shaft are respectively connected with a third gear (20) and a second gear (19) through keys, a bearing at the bottom of the second rotating shaft is separated from the third gear (20) through a shaft sleeve arranged on the second rotating shaft, the third gear (20) and the second gear (19) are separated through a shaft sleeve arranged on the second rotating shaft, and the first gear (15) is meshed with the second gear (19);

a fourth gear (22) is arranged on a shaft shoulder at the lower end of a third rotating shaft (21) through a key, the fourth gear (22) is meshed with the third gear (20), the upper end surface of the fourth gear is separated from a fifth gear (24) arranged at the upper end of the third rotating shaft through a shaft sleeve, and the fifth gear is connected with the third rotating shaft through a key;

a sixth gear (25) is meshed with the fifth gear, and a fourth belt wheel (26) and the third belt wheel (16) are connected through a second synchronous toothed belt (27);

the sixth gear (25) and the fourth belt wheel (26) are fixed on a spline nut (31) of a rotary ball spline through long screws, the spline nut (31) is fixed on a base (34) through a flange outer ring, a spline shaft (30) of the rotary ball spline arranged in the vertical direction is meshed with the spline nut (31), a base connecting piece (29) is fixed on the base (34) through screws, the top surface of the base connecting piece (29) is connected with a low-friction cylinder (28) through a boss, and an output shaft of the low-friction cylinder is fixedly connected with the upper end of the spline shaft, so that an executing element connected with the end of the spline shaft can move up and down in a certain stroke.

2. The polishing mechanism with variable transmission ratio for changing the eccentricity value by the eccentric adjusting block according to claim 1, wherein: the counterweight flywheel is in a semi-disc shape.

3. The polishing mechanism with variable transmission ratio for changing the eccentric value by the eccentric adjusting block according to claim 1 or 2, wherein: the speed reducer adopts a precise planetary gear speed reducer.

4. The polishing mechanism with variable transmission ratio for changing the eccentric value by the eccentric adjusting block according to claim 3, wherein: the upper overrunning clutch and the lower overrunning clutch are both wedge type overrunning clutches, the wedge type upper overrunning clutch and the wedge type lower overrunning clutch are connected with the first rotating shaft through keys, the third belt wheel and the wedge type lower overrunning clutch are connected through wedge blocks arranged in grooves which are opposite to each other, the first gear and the wedge type upper overrunning clutch are also connected through wedge blocks arranged in grooves which are opposite to each other, and when the direction of connection of the wedge type lower overrunning clutch and the third belt wheel is opposite to the direction of connection of the wedge type upper overrunning clutch and the first gear so that the first rotating shaft rotates, the state of connection or disconnection of the wedge type upper overrunning clutch and the first gear is opposite to the state of connection or disconnection of the wedge type lower overrunning clutch and the third belt wheel.

Images