CN110666651A - Automatic burnishing machine of tool changing - Google Patents

Abstract

The invention discloses a polishing machine for automatic tool change, which comprises a grinding driving motor, a motor mounting plate, a dust collecting cover seat, a main turntable, an end face gear, a tool changing driving motor, an outer support ring and several square rotating shafts, and a dust collecting cover A collector ring is fixed in the seat, the end gear is meshed with the main turntable, the main turntable is connected with the dust collection cover seat through the bearing, the main turntable is provided with an adsorption hole, and a dust collection is formed between the outer support ring, the main turntable and the dust collection cover seat The chamber, the adsorption hole is communicated with the dust collection chamber, the dust collection cover seat is provided with a vacuum suction nozzle, the two ends of the square shaft are respectively connected to the outer support ring and the main turntable, and the square shaft is provided with a grinding knife, and the tool change drive motor passes through The conductive part of the roller is electrically connected to the collector ring, the output end of the drive motor for tool change is connected with a driving bevel gear, and one end of the square rotating shaft is connected with a driven bevel gear; the tool change function can be realized automatically through the present invention, without manual disassembly and replacement. The knife greatly improves the polishing efficiency of the workpiece and improves the productivity.

Description

A polishing machine with automatic tool change

technical field

The invention relates to the technical field of polishing equipment, in particular to a polishing machine with automatic tool change.

Background technique

When the existing polishing equipment grinds and polishes the workpiece, it is necessary to replace different types of grinding knives to complete the polishing of the workpiece, and the operation of replacing the grinding knives is often manual disassembly and replacement, which is time-consuming and laborious, resulting in low polishing efficiency and low productivity of the workpiece. .

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the above shortcomings and provide a polishing machine with automatic tool change.

For achieving the above object, the concrete scheme of the present invention is as follows:

A polishing machine for automatic tool change, comprising a grinding drive motor, a motor mounting plate, a dust collecting cover seat, a main turntable, an end face gear, a tool changing drive motor and an outer support ring, the dust collecting cover seat includes a dust collecting cover body and an outer support ring. a cover-seat connection pipe, the lower end of the cover-seat connection pipe passes through the middle of the dust-collecting cover body, and is integrally formed with the dust-collecting cover body, the inner wall of the cover-seat connection pipe is fixed with a collector ring, and the motor mounting plate It is fixed on the upper end of the connecting pipe of the cover base, the grinding drive motor is fixed on the motor mounting plate, and its output end passes through the motor mounting plate and is connected with the end gear. The lower disk body connecting pipe, the lower end of the upper disk body connecting pipe is fixed on the middle top surface of the turntable body, the upper end of the lower disk body connecting pipe is fixed on the middle bottom surface of the turntable body, and the end gear is connected with the upper disk body. The upper ends of the pipes are engaged, and the outer wall of the upper plate body connecting pipe is connected with the inner wall of the cover seat connecting pipe through a bearing. The turntable body is provided with several arc-shaped slots along the radial direction. Adsorption holes are radially spaced between adjacent slots, the height of the outer support ring is greater than the height of the turntable body, the outer support ring is sleeved on the turntable body, and is fixedly connected with the turntable body. A dust-collecting chamber is formed between the support ring, the main turntable and the dust-collecting cover seat, the adsorption hole communicates with the dust-collecting chamber, and the dust-collecting cover body is provided with a vacuum suction nozzle that communicates with the dust-collecting chamber, Each of the slots is provided with a square rotating shaft, two ends of the square rotating shaft are rotatably connected to the outer support ring and the lower plate body connecting pipe, respectively, and grinding knives are respectively provided on each side of the square rotating shaft along the rotation direction, The grinding knife is used for grinding the surface of the workpiece. The tool-changing drive motor is fixed on the turntable body and is located in the connecting pipe of the upper disk body. It is electrically connected to the collector ring, the output end of the tool change drive motor extends into the turntable body and is connected with a driving bevel gear, and one end of each of the square rotating shafts extends into the lower disk body connecting pipe and is connected with a driven respectively. A bevel gear, each of the driven bevel gears is meshed with the driving bevel gear respectively, and a dust-proof end cover is also fixed at the lower end of the connecting pipe of the lower disc body.

Wherein, the polishing blade includes a sponge buffer pad and a polishing pad, the sponge buffer pad is fixed on the square rotating shaft, and the polishing pad is fixed on the sponge buffer pad.

Wherein, a limit mechanism is respectively provided between the lower disk body connecting pipe and each of the square rotating shafts, and the limit mechanism is used to prevent the square rotating shaft from rotating by itself during the grinding process.

Wherein, the limit mechanism includes a circular electromagnet, a return spring, a first limit plate and a second limit plate, the electromagnet is sleeved on one end of the square rotating shaft, and is fixed on the lower plate body connecting pipe On the outer wall, the return spring is sleeved on one end of the square rotating shaft and is located in the electromagnet, the second limit plate is sleeved on one end of the square rotating shaft and fixed on the end face of the square rotating shaft, the first limit The position plate is movably sleeved on one end of the square rotating shaft, and is located between the electromagnet and the second limit plate. The first limit plate is provided with a limit groove, the second limit plate is provided with a limit bump for matching with the limit groove, and the first limit plate is provided with two guide rods, so the The other end of the guide rod movably extends into the connecting pipe of the lower disc body.

Wherein, the conductive part of the roller includes an installation post and a conductive roller, one end of the installation post is fixed on the drive motor for tool change, and the conductive roller is connected to the other end of the installation post and is in contact with the collector ring.

The beneficial effects of the present invention are: compared with the prior art, the present invention automatically realizes the tool changing function by installing different types of grinding knives on the six square rotating shafts, and driving the six square rotating shafts to rotate through the tool-changing driving motor. There is no need to manually disassemble and change the tool, and six grinding knives are used to grind and polish the workpiece at the same time, which greatly improves the polishing efficiency of the workpiece, improves productivity and saves costs;

In addition, during the grinding and polishing process, the polishing machine of the present invention can automatically clean up the debris and powder generated by the grinding, without the need for additional cleaning equipment, greatly saving the cost of grinding and polishing, and ensuring the polishing effect of the workpiece;

In addition, the present invention adopts the built-in method of the tool-changing driving motor, which can further reduce the volume of the polishing machine and make the structure more compact.

Description of drawings

1 is a perspective view of a polishing machine provided by an embodiment of the present invention;

2 is a bottom view of a polishing machine provided by an embodiment of the present invention;

3 is a cross-sectional view of a polishing machine provided by an embodiment of the present invention;

4 is an exploded schematic view of a polishing machine provided by an embodiment of the present invention;

5 is a schematic diagram of a partial structure of a polishing machine provided by an embodiment of the present invention;

6 is a schematic structural diagram of the cooperation of a limit mechanism, a square rotating shaft and a grinding knife provided by an embodiment of the present invention;

7 is a cross-sectional view of a dust collecting cover seat provided by an embodiment of the present invention;

8 is a schematic structural diagram of a main turntable provided by an embodiment of the present invention;

9 is a schematic structural diagram of another viewing angle of the main turntable provided by an embodiment of the present invention;

10 is a schematic structural diagram of a square rotating shaft provided by an embodiment of the present invention;

11 is an exploded schematic diagram of a limiting mechanism provided by an embodiment of the present invention;

12 is a schematic structural diagram of a roller conductive component provided by an embodiment of the present invention;

13 is a schematic structural diagram of a face gear provided by an embodiment of the present invention;

Description of reference numerals: 1-grinding drive motor; 2-motor mounting plate; 3-dust-collecting cover base; 31-dust-collecting cover body; 32-cover-base connecting pipe; 4-main turntable; 41-turntable body; 411- slot; 412-adsorption hole; 42-connecting pipe of upper disc body; 43-connecting tube of lower disc body; 5-face gear; 6-tool change drive motor; 7-outer support ring; 8-collector ring; 9- Bearing; 10-dust chamber; 20-square shaft; 201-shaft body; 202-first connecting shaft; 203-second connecting shaft; 30-grinding knife; 301-sponge cushion; 302-grinding disc; 40 -Conductive parts of roller; 401-Installation column; 402-Conductive roller; 50- Driving bevel gear; 60- Driven bevel gear; 70- Dust cover; 80- Limiting mechanism; 801- Electromagnet; ; 803 - the first limit plate; 8031 - the limit groove; 8032 - the guide rod; 804 - the second limit plate; 8041 - the limit bump.

Detailed ways

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

As shown in FIGS. 1 to 13 , the polishing machine for automatic tool change described in this embodiment includes a grinding drive motor 1 , a motor mounting plate 2 , a dust collecting cover seat 3 , a main turntable 4 , an end face gear 5 , a The knife drive motor 6 and the outer support ring 7, the dust collecting cover base 3 includes a dust collecting cover body 31 and a cover base connecting pipe 32, the lower end of the cover base connecting pipe 32 passes through the middle of the dust collecting cover body 31, and It is integrally formed with the dust collecting cover 31, the inner wall of the cover base connecting pipe 32 is fixed with a collector ring 8, the motor mounting plate 2 is fixed on the upper end of the cover base connecting pipe 32, and the grinding drive motor 1 is fixed on the motor On the mounting plate 2, and its output end passes through the motor mounting plate 2 and is connected to the end gear 5, the main turntable 4 includes a turntable body 41, an upper disk body connecting pipe 42 and a lower disk body connecting pipe 43. The upper disk The lower end of the body connecting pipe 42 is fixed on the top surface of the middle part of the turntable body 41 , the upper end of the lower body connecting pipe 43 is fixed on the bottom surface of the middle part of the turntable body 41 , and the end gear 5 is engaged with the upper end of the upper body connecting pipe 42 . , the outer wall of the upper plate body connecting pipe 42 is connected with the inner wall of the cover seat connecting pipe 32 through the bearing 9, the turntable body 41 is provided with six arc-shaped slots 411 along the radial direction, and the The middle of the bottom surface is provided with an escape groove for installing the lower disk body connecting pipe 43, the escape groove is communicated with the six groove positions 411, and the turntable body 41 is located between two adjacent groove positions 411 radially spaced Six adsorption holes 412 are provided. The height of the outer support ring 7 is greater than the height of the turntable body 41. The outer support ring 7 is sleeved on the turntable body 41 and is fixedly connected with the turntable body 41. The dust collecting cover The outer circumferential wall of the body 31 is in contact with the inner wall of the outer support ring 7. A dust collection chamber 10 is formed between the outer support ring 7, the main turntable 4 and the dust collection cover seat 3. The adsorption holes 412 are connected to the dust collection chamber 10. The chamber 10 is connected, the dust collecting cover 31 is provided with a vacuum nozzle (not shown in the figure) that communicates with the dust collecting chamber 10, and a square rotating shaft 20 is arranged in each of the slots 411, so Both ends of the square rotating shaft 20 are respectively connected to the outer support ring 7 and the lower disk body connecting pipe 43 in rotation, and each side of the square rotating shaft 20 along the rotation direction is respectively provided with grinding knives 30, and the grinding knives 30 are used for grinding the workpiece. On the surface, the tool change drive motor 6 is fixed on the turntable body 41 and located in the upper plate body connecting pipe 42. The electrical connection end of the tool change drive motor 6 passes through the end face gear 5 through the roller conductive member 40 and then connects with the end face gear 5. The collector ring 8 is electrically connected, the output end of the tool change drive motor 6 extends into the turntable body 41 and is connected to the drive bevel gear 50 , and one end of each of the square shafts 20 extends into the lower disk body connecting pipe 43 The driven bevel gears 60 are respectively connected, and each of the driven bevel gears 60 is meshed with the driving bevel gear 50 respectively. The lower end of the lower disk body connecting pipe 43 is also fixed with a dust-proof end cover 70 .

Specifically, the square rotating shaft 20 includes a square rotating shaft body 201, a first connecting shaft 202 and a second connecting shaft 203. The first connecting shaft 202 and the second connecting shaft 203 are fixedly connected to two end surfaces of the rotating shaft body 201 respectively. The other end of a connecting shaft 202 movably extends into the connecting pipe 43 of the lower disc body, and is fixedly connected to the driven bevel gear 60 . Grinding knives 30 of different types are fixed on the top, which can be set as the first grinding knife, the second grinding knife, the third grinding knife and the fourth grinding knife respectively, and the main turntable 4 is integrally formed. , you can choose different types of grinding knives 30. For example, if the first grinding knife is used first, the driving bevel gear 50 is driven to rotate by the knife-changing drive motor 6. The driving bevel gear 50 simultaneously drives the six driven bevel gears 60 to rotate, and the six driven The bevel gear 60 drives the six square shafts 20 to rotate, so that the first grinding knife faces the surface of the workpiece, thereby completing the selection of the grinding knife 30 model. The gear 5 drives the main turntable 4 to rotate at a high speed, thereby driving the six grinding knives 30 to rotate at a high speed to grind and polish the surface of the workpiece. After completing the work of the first grinding knife, the motor 6 is driven by changing the knife again to select the second grinding. For the knife, repeat the above process to complete the knife change, and then carry out the grinding and polishing work of the second grinding knife. In this cycle, the grinding and polishing work of the third grinding knife and the fourth grinding knife are completed in turn, so that the automatic knife change can be completed without manual disassembly. Tool change, and six grinding knives 30 work at the same time, greatly improving the work efficiency of grinding and polishing, saving time; of course, different tool changing sequences can be carried out according to actual needs; during the grinding process, at the same time through the vacuum suction nozzle. The dust chamber 10 is evacuated. Under the action of air pressure, the debris and powder produced by grinding pass through the adsorption hole 412 and are sucked into the dust collecting chamber 10 for storage. Due to the function of the bearing 9, during the grinding process, the dust collecting cover The seat 3 will not rotate with the main turntable 4, and a dust-proof end cover 70 is provided at the lower end of the connecting pipe 43 of the lower disk, which can effectively prevent the debris and powder generated by grinding from entering the connecting pipe 43 of the lower disk, so as to ensure the active cone The reliability of the transmission between the gear 50 and the driven bevel gear 60 is ensured; the collector ring 8 is installed on the inner wall of the cover base connecting pipe 32, and the electrical conduction of the tool change drive motor 6 is realized through the roller conductive component 40, so that the tool change drive When the motor 6 rotates under the driving of the main turntable 4, the power supply of the tool change drive motor 6 can still be realized, and then the tool change drive motor 6 can be built in the main turntable 4, which can further reduce the volume of the polishing machine and the structure is more compact, At the same time, it is beneficial to drive the square rotating shaft 20 to rotate, realize the function of changing the tool, and simplify the structure.

In this embodiment, different types of grinding knives 30 are installed on the six square rotating shafts 20, and the six square rotating shafts 20 are driven to rotate by the knife-changing drive motor 6, so as to automatically realize the tool-changing function, without manual disassembly for the tool-changing, and using six The grinding knives 30 grind and polish the workpiece at the same time, which greatly improves the polishing efficiency of the workpiece, improves productivity and saves costs;

In addition, during the grinding and polishing process, the polishing machine of this embodiment can automatically clean up the debris and powder generated by the grinding, without the need for additional cleaning equipment, greatly saving the cost of grinding and polishing, and ensuring the polishing effect of the workpiece;

In addition, in this embodiment, the tool-changing driving motor 6 is built-in, which can further reduce the volume of the polishing machine and make the structure more compact.

Based on the above embodiment, further, as shown in FIG. 6 , the polishing blade 30 includes a sponge buffer pad 301 and a polishing pad 302 , the sponge buffer pad 301 is fixed on the square shaft 20 , and the polishing pad 302 is fixed on the On the sponge buffer pad 301; specifically, the sponge buffer pad 301 is fixed on the four sides of the rotating shaft body 201, and the knife-changing drive motor 6 drives the square rotating shaft 20 to rotate, so that the four sides of the square rotating shaft 20 can be turned downward in turn, thereby enabling The tool change is completed, and the sponge buffer pad 301 provides a buffering effect for the polishing pad 302, which can better protect the polishing pad 302.

In order to avoid insufficient limit accuracy of the tool change drive motor 6, the driving bevel gear 50 and the driven bevel gear 60, based on the above-mentioned embodiment, further, as shown in Figs. 43 and each of the square shafts 20 are respectively provided with a limit mechanism 80, the limit mechanism 80 is used to prevent the square shaft 20 from rotating by itself during the grinding process; specifically, when the automatic tool change is completed, the limit The mechanism 80 limits the square rotating shaft 20 so that the square rotating shaft 20 does not self-propagate, and ensures the flatness of the bottom surface of each square rotating shaft 20 facing downward, thereby ensuring the high precision of grinding and polishing, and the polishing effect is better.

In this embodiment, further, as shown in FIG. 11 , the limit mechanism 80 includes a circular electromagnet 801 , a return spring 802 , a first limit plate 803 and a second limit plate 804 . The electromagnet 801 The return spring 802 is sleeved on one end of the square rotating shaft 20 and is fixed on the outer wall of the lower plate body connecting pipe 43. The return spring 802 is sleeved on one end of the square rotating shaft 20 and is located in the electromagnet 801. The second limiting plate 804 The first limiting plate 803 is movably sleeved on one end of the square rotating shaft 20 and is located between the electromagnet 801 and the second limiting plate 804 . During this time, the two ends of the return spring 802 are respectively fixedly connected to the outer wall of the lower plate body connecting pipe 43 and the first limit plate 803, the first limit plate 803 is provided with a limit groove 8031, the second limit The position plate 804 is provided with a limit bump 8041 for matching with the limit groove 8031, the first limit plate 803 is provided with two guide rods 8032, the other ends of the guide rods 8032 movably extend into the lower plate Specifically, the electromagnet 801, the return spring 802, the first limit plate 803 and the second limit plate 804 are all sleeved on the first connecting shaft 202, and the second limit plate 804 is fixed on the rotating shaft On the end surface of the main body 201 , the shapes of the first limiting plate 803 and the second limiting plate 804 are both square, and the second limiting plate 804 faces the first limiting plate 803 in the middle of the four sides of the surface. For the bump 8041 , two lugs are respectively arranged in the middle positions of the four sides of the surface of the first limit plate 803 facing the second limit plate 804 , and a limit that cooperates with the limit bump 8041 is formed between the two lugs. Groove 8031; during operation, the electromagnet 801 is energized, the electromagnet 801 magnetically attracts the first limit plate 803, so that the first limit plate 803 moves away from the second limit plate 804, and at the same time the first limit plate 803 is compressed and reset The spring 802, at this time, the limiting groove 8031 is separated from the limiting bump 8041, the square shaft 20 can be released, and the first limiting plate 803 is moving, and the two guide rods 8032 provide the first limiting plate 803. guide, and ensure the smooth movement of the first limit plate 803, and then the tool change drive motor 6 drives the square shaft 20 to rotate to change the tool. After the tool change is completed, the electromagnet 801 is powered off, and the first limit plate 803 is no longer magnetically adsorbed. At this time, the return spring 802 restores its elastic deformation, and pushes the first limit plate 803 to move toward the second limit plate 804 until the limit groove 8031 of the first limit plate 803 and the limit protrusion of the second limit plate 804 The block 8041 cooperates, and the two guide rods 8032 provide guidance for the first limit plate 803 again to ensure that the limit groove 8031 and the limit bump 8041 can complete the cooperation, thereby limiting the square shaft 20. At this time, the square shaft 20 will not shake or self-rotate, thereby ensuring the flatness of the bottom surface of each square rotating shaft 20; in each tool change process, the electromagnet 801 is energized first, so that the first The limiting plate 803 moves away from the second limiting plate 804 so that the square rotating shaft 20 can perform a tool change operation.

Based on the above embodiment, further, as shown in FIG. 12 , the conductive roller part 40 includes a mounting post 401 and a conductive roller 402 , one end of the mounting post 401 is fixed on the tool change drive motor 6 , and the conductive roller 402 is pivotally connected to the other end of the mounting column 401 and is in contact with the collector ring 8; specifically, since the tool changer drive motor 6 is installed on the main turntable 4, the end gear 5 drives the main turntable 4 to rotate, and the main turntable 4 will drive the changer. The knife drive motor 6 rotates, so that the face gear 5 and the knife changer drive motor 6 remain relatively static, and the dust cover base 3 does not rotate with the main turntable 4. During operation, the knife changer drive motor 6 will drive the installation column. 401 and the conductive roller 402 rotate, so that the conductive roller 402 rolls along the collector ring 8, while maintaining the electrical continuity of the tool change driving motor 6, which can effectively avoid the problem of wire winding caused by wire connection.

The above is only a preferred embodiment of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims (6)

1. The polishing machine with the automatic tool changing function is characterized by comprising a polishing driving motor (1), a motor mounting plate (2), a dust collecting cover seat (3), a main rotating disc (4), an end face gear (5), a tool changing driving motor (6) and an outer supporting ring (7), wherein the dust collecting cover seat (3) comprises a dust collecting cover body (31) and a cover seat connecting pipe (32), the lower end of the cover seat connecting pipe (32) penetrates through the middle part of the dust collecting cover body (31) and is integrally formed with the dust collecting cover body (31), the inner wall of the cover seat connecting pipe (32) is fixed with a collecting ring (8), the motor mounting plate (2) is fixed at the upper end of the cover seat connecting pipe (32), the polishing driving motor (1) is fixed on the motor mounting plate (2), and the output end of the polishing driving motor passes through the motor mounting plate (2) and then is connected with the end face gear (5), the main turntable (4) comprises a turntable body (41), an upper turntable body connecting pipe (42) and a lower turntable body connecting pipe (43), the lower end of the upper turntable body connecting pipe (42) is fixed on the top surface of the middle part of the turntable body (41), the upper end of the lower turntable body connecting pipe (43) is fixed on the bottom surface of the middle part of the turntable body (41), the end face gear (5) is meshed with the upper end of the upper turntable body connecting pipe (42), the outer wall of the upper turntable body connecting pipe (42) is connected with the inner wall of the cover base connecting pipe (32) through a bearing (9), the turntable body (41) is provided with a plurality of arc-shaped groove positions (411) along the radial direction, the turntable body (41) is provided with adsorption holes (412) between two adjacent groove positions (411) along the radial direction at intervals, the height of the outer support ring (7) is greater than that of the turntable body (41), the outer support ring (7) is sleeved, and with carousel body (41) fixed connection, be formed with collection dirt cavity (10) between outer support ring (7), main carousel (4) and collection dirt lid seat (3), absorption hole (412) and collection dirt cavity (10) intercommunication, be equipped with the vacuum nozzle who communicates with collection dirt cavity (10) on collection dirt lid (31), at every be equipped with square pivot (20) in trench (411), the both ends of square pivot (20) are rotated respectively and are connected at outer support ring (7) and lower disk body connecting pipe (43), each side along the direction of rotation is equipped with respectively on square pivot (20) beats sword (30), it is used for polishing the workpiece surface to beat sword (30), tool changing driving motor (6) are fixed on carousel body (41) to be located upper disk body connecting pipe (42), the electric connection end of driving motor (6) leads sword ring (8) electric conductance after passing end face gear (5) through gyro wheel conductive part (40), and lead sword ring (8) electric conductance Lead to, the output of tool changing driving motor (6) is connected with initiative conical gear (50) after stretching into carousel body (41), every the one end of square pivot (20) is connected with driven conical gear (60) respectively after stretching into lower disk body connecting pipe (43), every driven conical gear (60) mesh with initiative conical gear (50) respectively, the lower extreme of lower disk body connecting pipe (43) still is fixed with dust cap (70).

2. The automatic tool changing polishing machine according to claim 2, characterized in that the polishing knife (30) comprises a sponge cushion pad (301) and a polishing plate (302), the sponge cushion pad (301) is fixed on the square rotating shaft (20), and the polishing plate (302) is fixed on the sponge cushion pad (301).

3. The automatic tool changing polishing machine according to claim 1, characterized in that a limiting mechanism (80) is respectively arranged between the lower disc body connecting pipe (43) and each square rotating shaft (20), and the limiting mechanism (80) is used for preventing the square rotating shaft (20) from rotating by itself in the polishing process.

4. The automatic tool changing polishing machine according to claim 3, wherein the limiting mechanism (80) comprises a circular electromagnet (801), a return spring (802), a first limiting plate (803) and a second limiting plate (804), the electromagnet (801) is sleeved on one end of the square rotating shaft (20) and fixed on the outer wall of the lower disc body connecting pipe (43), the return spring (802) is sleeved on one end of the square rotating shaft (20) and located in the electromagnet (801), the second limiting plate (804) is sleeved on one end of the square rotating shaft (20) and fixed on the end face of the square rotating shaft (20), the first limiting plate (803) is movably sleeved on one end of the square rotating shaft (20) and located between the electromagnet (801) and the second limiting plate (804), two ends of the return spring (802) are respectively and fixedly connected with the outer wall 803 of the lower disc body connecting pipe (43) and the first limiting plate (803), first limiting plate (803) are equipped with spacing recess (8031), be equipped with on second limiting plate (804) and be used for with spacing recess (8031) complex spacing lug (8041), first limiting plate (803) are equipped with two guide bars (8032), the other end activity of guide bar (8032) stretches into in lower disk body connecting pipe (43).

5. The automatic tool changing polishing machine according to claim 5, characterized in that the roller conductive member (40) comprises a mounting column (401) and a conductive roller (402), one end of the mounting column (401) is fixed on the tool changing driving motor (6), and the conductive roller (402) is coupled to the other end of the mounting column (401) and is in contact with the slip ring (8).

6. The automatic tool changing polishing machine according to claim 5, characterized in that the roller conductive member (40) comprises a mounting column (401) and a conductive roller (402), one end of the mounting column (401) is fixed on the tool changing driving motor (6), and the conductive roller (402) is coupled to the other end of the mounting column (401) and is in contact with the slip ring (8).

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