Connection mode of direct-connection main shaft

Abstract

The invention discloses a connection mode of a direct connection main shaft, which comprises a servo motor, a first motor plate is mounted on the servo motor, and a second motor plate is mounted on the first motor plate; a plurality of first through holes are formed in the first motor plate, first bolts are installed in the first through holes in a sliding mode, a plurality of first threaded holes matched with the first bolts are formed in the second motor plate, and the second motor plate and the spindle head are fixed through second bolts; the flatness and the concentricity of the second motor plate are corrected within a required tolerance through the dial indicator, the servo motor is fixedly connected with the first motor plate, then the convex edge part of the first motor plate is corrected by the dial indicator with a mandrel of the servo motor as a reference, and the precision is adjusted to be within the tolerance. And finally, the first motor plate and the second motor plate are connected and fixed through the first bolts, so that the required assembly standard is achieved, the technical requirements of assembly personnel are reduced, and the purpose of improving the production efficiency is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of spindle transmission of a machining center, and in particular to a connection method for a direct-connected spindle. Background Art

[0002] CNC milling machine is also called CNC (Computer Numerical Control) milling machine. In English, it means a milling machine controlled by electronic digital signals. CNC milling machine is an automatic processing equipment developed on the basis of general milling machine. The processing technology of the two is basically the same, and the structure is also somewhat similar. CNC milling machine can be divided into two categories: without tool magazine and with tool magazine. Among them, CNC milling machine with tool magazine is also called machining center.

[0003] Generally, the spindle transmission of a machining center includes belts, gears or direct connection transmission. For the requirements of high speed and precision, direct connection transmission is the best. However, the current direct connection process is relatively complicated. The direct-connected spindle is prone to heat up when working, and the heat dissipation effect of the heat dissipation mechanism in the prior art is poor, resulting in uneven heat dissipation of the spindle, which can easily lead to a decrease in the accuracy of the structure and shorten the service life of the spindle. Therefore, a connection method for a direct-connected spindle is needed. Summary of the invention

[0004] The purpose of the present invention is to provide a connection method for a direct-connected spindle to solve the problems raised in the above background technology that the existing direct connection process is relatively complicated, the direct-connected spindle is prone to heat up when working, and the heat dissipation effect of the heat dissipation mechanism in the prior art is poor, resulting in uneven heat dissipation of the spindle, which easily leads to a decrease in the use accuracy of the structure and shortens the service life of the spindle.

[0005] To achieve the above object, the present invention provides the following technical solution: a connection method for a direct-connected spindle, comprising a servo motor, a first motor plate mounted on the servo motor, and a second motor plate mounted on the first motor plate; a plurality of first through holes are provided on the first motor plate, first bolts are slidably mounted in the first through holes, and a plurality of first threaded holes adapted to the first bolts are provided on the second motor plate;

[0006] A spindle head is installed at one end of the second motor plate away from the first motor plate, a plurality of second through holes are provided on the second motor plate, second bolts are slidably installed in the second through holes, and a plurality of second threaded holes matching the second bolts are provided on the spindle head;

[0007] A mounting seat is installed on one end of the spindle head away from the second motor plate, a plurality of third through holes are opened on the spindle head, third bolts are slidably installed in the third through holes, and a plurality of third threaded holes adapted to the third bolts are opened on the mounting seat;

[0008] A main shaft is rotatably mounted in the mounting seat, a coupling is mounted on the top of the main shaft, a motor output shaft is mounted on the top of the coupling, the motor output shaft is mounted on the servo motor, the coupling is rotatably mounted in the main shaft head, and the motor output shaft is rotatably mounted on the first motor plate and the second motor plate.

[0009] A cooling box is installed on one side of the mounting seat, a cavity is opened in the cooling box, a liquid storage tank is installed in the cavity, a liquid inlet pipe and a liquid outlet pipe are installed on the liquid storage tank, a cooling cavity is opened in the mounting seat, a coolant pipe arranged in a threaded shape is arranged in the cooling cavity, and the liquid inlet pipe and the liquid outlet pipe both pass through the mounting seat and are respectively connected to the two ends of the coolant pipe.

[0010] Preferably, a water pump is installed in the liquid storage tank, and the water pump is installed at one end of the liquid inlet pipe.

[0011] Preferably, a plurality of cooling fins are installed on the liquid storage tank, a mounting plate is installed in the cavity, and a cooling fan is installed on the mounting plate.

[0012] Preferably, a filter slot is provided on the cooling box, a filter mounting plate is slidably mounted in the filter slot, and a dustproof filter is mounted on the filter mounting plate.

[0013] Preferably, a positioning rod is slidably mounted on the cooling box, and a positioning slot matched with the positioning rod is provided on the filter installation plate.

[0014] Preferably, a baffle is installed on the positioning rod, and a return spring is slidably sleeved on the positioning rod, one end of the return spring is installed on the cooling box, and the other end of the return spring is installed on the baffle.

[0015] Preferably, a first connecting hole is provided on the coupling, the first connecting hole is adapted to the motor output shaft, and the motor output shaft is clamped in the first connecting hole.

[0016] Preferably, a second connecting hole is formed at one end of the coupling away from the first connecting hole, the second connecting hole is adapted to the main shaft, and the main shaft is clamped in the second connecting hole.

[0017] Preferably, the first bolt, the second bolt and the third bolt are all provided with a hexagon socket.

[0018] Preferably, cooling oil for heat conduction is provided in the cooling cavity. The connection between the liquid outlet pipe and the liquid inlet pipe and the mounting seat is sealed.

[0019] The beneficial effects of the present invention are:

[0020] In the present invention, the second motor plate and the spindle head are fixed by the second bolt, and then the flatness and concentricity of the second motor plate are corrected within the required tolerance by a micrometer with the spindle as a reference, and the servo motor is connected and fixed to the first motor plate, and then the raised edge portion of the first motor plate is corrected with a micrometer with the servo motor spindle as a reference, and the accuracy is adjusted to within the tolerance, and finally the first motor plate and the second motor plate are connected and fixed by the first bolt, so as to meet the required assembly standards, thereby reducing the technical requirements of the assemblers and achieving the purpose of standardized production and improved production efficiency.

[0021] In the present invention, by means of structures such as a liquid storage tank, a water pump, a coolant pipe and a cooling fan, the liquid storage tank can be cooled by the rotation of the cooling fan, thereby reducing the temperature of the coolant in the liquid storage tank, and the coolant is transported to the coolant pipe through the liquid inlet pipe by the water pump in the liquid storage tank, thereby adsorbing the temperature of the cooling oil in the cooling chamber to reduce the temperature of the cooling oil, and the cooling oil can be used to cool the main shaft to avoid the main shaft being in a high temperature state for a long time and reducing the service life, and the heated coolant can be transported to the liquid storage tank through the liquid outlet pipe to achieve circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A structural schematic diagram of a connection method of a direct-connected main shaft proposed by the present invention;

[0023] Figure 2 A schematic diagram of a side cross-sectional structure of a connection method of a direct-connected main shaft proposed by the present invention;

[0024] Figure 3 A connection method for a direct-connected main shaft proposed by the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0025] Figure 4 A schematic cross-sectional structure diagram of a liquid inlet pipe in a connection mode of directly connecting to a main shaft proposed by the present invention;

[0026] Figure 5 A schematic cross-sectional structure diagram of a liquid inlet pipe and a liquid outlet pipe of a connection method directly connected to a main shaft proposed by the present invention;

[0027] Figure 6 A schematic diagram of the side cross-sectional structure of a positioning rod in a connection mode of directly connecting to a main shaft proposed by the present invention;

[0028] Figure 7 A connection method for a direct-connected main shaft proposed by the present invention Figure 6 Enlarged schematic diagram of the structure at point B in the middle.

[0029] In the figure: 1. servo motor; 2. first motor plate; 3. second motor plate; 4. spindle head; 5. cooling box; 6. dust filter; 7. filter mounting plate; 8. mounting seat; 9. cooling chamber; 10. coolant pipe; 11. spindle; 12. cavity; 13. cooling fin; 14. cooling fan; 15. reset spring; 16. liquid storage tank; 17. motor output shaft; 18. first bolt; 19. first through hole; 20. first threaded hole; 21. second through hole; 22. second bolt; 23. second threaded hole; 24. coupling; 25. first connecting hole; 26. second connecting hole; 27. third threaded hole; 28. third bolt; 29. ​​third through hole; 30. liquid inlet pipe; 31. filter slot; 32. water pump; 33. mounting plate; 34. liquid outlet pipe; 35. positioning rod; 36. positioning slot; 37. baffle. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1-7 A connection method for a direct-connected spindle includes a servo motor 1, a first motor plate 2 is installed on the servo motor 1, and a second motor plate 3 is installed on the first motor plate 2; a plurality of first through holes 19 are opened on the first motor plate 2, and a first bolt 18 is slidably installed in the first through hole 19, and a plurality of first threaded holes 20 adapted to the first bolt 18 are opened on the second motor plate 3; through the mutual cooperation of the first bolts 18, the first through holes 19 and the first threaded holes 20, the installation and disassembly between the first motor plate 2 and the second motor plate 3 are facilitated.

[0032] A spindle head 4 is installed at one end of the second motor plate 3 away from the first motor plate 2, and a plurality of second through holes 21 are provided on the second motor plate 3. Second bolts 22 are slidably installed in the second through holes 21, and a plurality of second threaded holes 23 matched with the second bolts 22 are provided on the spindle head 4; the installation and disassembly between the second motor plate 3 and the spindle head 4 are facilitated by the mutual cooperation of the second bolts 22, the second through holes 21 and the second threaded holes 23.

[0033] A mounting seat 8 is installed at one end of the spindle head 4 away from the second motor plate 3, and a plurality of third through holes 29 are provided on the spindle head 4. Third bolts 28 are slidably installed in the third through holes 29, and a plurality of third threaded holes 27 matched with the third bolts 28 are provided on the mounting seat 8; through the mutual cooperation of the third bolts 28, the third through holes 29 and the third threaded holes 27, the installation and disassembly between the spindle head 4 and the mounting seat 8 are facilitated.

[0034] A main shaft 11 is rotatably mounted in the mounting seat 8, a coupling 24 is mounted on the top of the main shaft 11, a motor output shaft 17 is mounted on the top of the coupling 24, the motor output shaft 17 is mounted on the servo motor 1, the coupling 24 is rotatably mounted in the main shaft head 4, and the motor output shaft 17 is rotatably mounted on the first motor plate 2 and the second motor plate 3;

[0035] A cooling box 5 is installed on one side of the mounting seat 8, and a cavity 12 is opened in the cooling box 5. A liquid storage tank 16 is installed in the cavity 12. A liquid inlet pipe 30 and a liquid outlet pipe 34 are installed on the liquid storage tank 16. A cooling cavity 9 is opened in the mounting seat 8. A coolant pipe 10 arranged in a threaded shape is provided in the cooling cavity 9. The liquid inlet pipe 30 and the liquid outlet pipe 34 both penetrate the mounting seat 8 and are respectively connected to the two ends of the coolant pipe 10. Through the mutual cooperation of the cooling cavity 9, the coolant pipe 10 and the liquid storage tank 16 and other structures, the coolant in the liquid storage tank 16 can be transported to the coolant pipe 10 through the liquid inlet pipe 30 to cool the spindle 11, and the heated coolant in the coolant pipe 10 can be transported to the liquid storage tank 16 through the liquid outlet pipe 34 to complete the circulation.

[0036] Reference Figure 4-5 In the present invention, a water pump 32 is installed in the liquid storage tank 16, and the water pump 32 is installed at one end of the liquid inlet pipe 30. The coolant in the liquid storage tank 16 can be transported to the coolant pipe 10 through the liquid inlet pipe 30 by the provided water pump 32.

[0037] Reference Figure 4-5 In the present invention, a plurality of cooling fins 13 are installed on the liquid storage tank 16, a mounting plate 33 is installed in the cavity 12, and a cooling fan 14 is installed on the mounting plate 33. The cooling fins 13 can increase the heat dissipation area of ​​the liquid storage tank 16, thereby improving the heat dissipation efficiency of the liquid storage tank 16, and then the liquid storage tank 16 can be cooled by the cooling fan 14.

[0038] Reference Figure 4-7 In the present invention, a filter slot 31 is provided on the cooling box 5, a filter mounting plate 7 is slidably installed in the filter slot 31, and a dustproof filter 6 is installed on the filter mounting plate 7. The filter slot 31 cooperates with the filter mounting plate 7, thereby achieving the purpose of limiting the filter mounting plate 7.

[0039] Reference Figure 6-7 In the present invention, a positioning rod 35 is slidably installed on the cooling box 5, and a positioning slot 36 adapted to the positioning rod 35 is opened on the filter mounting plate 7. By the mutual cooperation between the positioning slot 36 and the positioning rod 35, when the positioning rod 35 is inserted into the positioning slot 36, the filter mounting plate 7 is locked and positioned.

[0040] Reference Figure 6-7In the present invention, a baffle 37 is installed on the positioning rod 35, and a return spring 15 is slidably sleeved on the positioning rod 35. One end of the return spring 15 is installed on the cooling box 5, and the other end of the return spring 15 is installed on the baffle 37. The return spring 15 can push the positioning rod 35 to be inserted into the positioning slot 36, thereby achieving the purpose of automatically positioning and locking the filter screen mounting plate 7.

[0041] Reference Figure 2-3 In the present invention, a first connecting hole 25 is provided on the coupling 24, and the first connecting hole 25 is adapted to the motor output shaft 17, and the motor output shaft 17 is clamped in the first connecting hole 25. By the mutual cooperation between the first connecting hole 25 and the motor output shaft 17, the purpose of facilitating the connection between the motor output shaft 17 and the coupling 24 is achieved.

[0042] Reference Figure 2-3 In the present invention, a second connecting hole 26 is provided at one end of the coupling 24 away from the first connecting hole 25. The second connecting hole 26 is adapted to the main shaft 11, and the main shaft 11 is snapped into the second connecting hole 26. By the mutual cooperation between the second connecting hole 26 and the main shaft 11, the purpose of facilitating the connection between the main shaft 11 and the coupling 24 is achieved.

[0043] Reference Figure 2-3 In the present invention, the first bolt 18, the second bolt 22 and the third bolt 28 are all provided with hexagonal grooves, and the installation and removal of the first bolt 18, the second bolt 22 and the third bolt 28 are facilitated by the provided hexagonal grooves.

[0044] Reference Figure 4-5 In the present invention, cooling oil for heat conduction is provided in the cooling chamber 9, and the connection between the liquid outlet pipe 34 and the liquid inlet pipe 30 and the mounting seat 8 is sealed. The cooling oil provided can improve the cooling efficiency of the main shaft, and the connection between the liquid outlet pipe 34 and the liquid inlet pipe 30 and the mounting seat 8 is sealed to avoid leakage of the cooling oil.

[0045] Working principle:

[0046] During installation, the second motor plate 3 and the spindle head 4 are connected by the second bolt 22 passing through the second through hole 21 and the second threaded hole 23, so that the second motor plate 3 and the spindle head 4 are fixed, and then the flatness and concentricity of the second motor plate 3 are corrected within the required tolerance by the micrometer with the spindle 11 as the reference, and the servo motor 1 and the first motor plate 2 are connected and fixed, and then the raised edge part of the first motor plate 2 is corrected with the micrometer with the main shaft of the servo motor 1 as the reference, and the accuracy is adjusted within the tolerance, and finally the first motor plate 2 and the second motor plate 3 are connected by the first bolt 18 passing through the first through hole 19 and the first threaded hole 20, so that the first motor plate 2 and the second motor plate 3 are connected and fixed, thereby meeting the required assembly standards, reducing the technical requirements required for assemblers, and further achieving the purpose of standardized production and improving production efficiency.

[0047] When the spindle 11 needs to be cooled, the coolant is transported to the coolant pipe 10 through the water pump 32 in the liquid reservoir 16 through the liquid inlet pipe 30, so that the temperature of the cooling oil in the cooling chamber 9 can be adsorbed to reduce the temperature of the cooling oil, and the temperature of the mounting seat 8 can be adsorbed and cooled by the cooling oil, thereby achieving the effect of cooling the spindle 11, avoiding the spindle 11 being in a high temperature state for a long time and reducing the service life, and the heated coolant can be transported to the liquid reservoir 16 through the provided liquid outlet pipe 34 to achieve circulation, and the air circulation speed on the surface of the liquid reservoir 16 is accelerated by the rotation of the cooling fan 14, thereby achieving the effect of cooling the liquid reservoir 16, and because a plurality of cooling fins 13 are provided on the surface of the liquid reservoir 16, the heat dissipation area of ​​the liquid reservoir 16 is increased, thereby improving the heat dissipation efficiency of the liquid reservoir 16, and thereby reducing the temperature of the coolant in the liquid reservoir 16, which is convenient for continuously cooling the spindle 11.

[0048] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A connection method for a direct-connected spindle, comprising a servo motor (1), characterized in that: The servo motor (1) is provided with a first motor plate (2), and a second motor plate (3) is provided on the first motor plate (2); a plurality of first through holes (19) are provided on the first motor plate (2), a first bolt (18) is slidably installed in the first through hole (19), and a plurality of first threaded holes (20) adapted to the first bolt (18) are provided on the second motor plate (3); A spindle head (4) is installed at one end of the second motor plate (3) away from the first motor plate (2); a plurality of second through holes (21) are provided on the second motor plate (3); second bolts (22) are slidably installed in the second through holes (21); and a plurality of second threaded holes (23) adapted to the second bolts (22) are provided on the spindle head (4); A mounting seat (8) is installed at one end of the spindle head (4) away from the second motor plate (3), a plurality of third through holes (29) are provided on the spindle head (4), third bolts (28) are slidably installed in the third through holes (29), and a plurality of third threaded holes (27) adapted to the third bolts (28) are provided on the mounting seat (8); A main shaft (11) is rotatably mounted in the mounting seat (8), a coupling (24) is mounted on the top of the main shaft (11), a motor output shaft (17) is mounted on the top of the coupling (24), the motor output shaft (17) is mounted on the servo motor (1), the coupling (24) is rotatably mounted in the main shaft head (4), and the motor output shaft (17) is rotatably mounted on the first motor plate (2) and the second motor plate (3). A cooling box (5) is installed on one side of the mounting seat (8), a cavity (12) is provided in the cooling box (5), a liquid storage box (16) is installed in the cavity (12), a liquid inlet pipe (30) and a liquid outlet pipe (34) are installed on the liquid storage box (16), a cooling cavity (9) is provided in the mounting seat (8), a cooling liquid pipe (10) arranged in a threaded shape is provided in the cooling cavity (9), and the liquid inlet pipe 30 and the liquid outlet pipe (34) both penetrate the mounting seat (8) and are respectively connected to the two ends of the cooling liquid pipe (10).

2. A connection method for a direct-connected main shaft according to claim 1, characterized in that: A water pump (32) is installed in the liquid storage tank (16), and the water pump (32) is installed at one end of the liquid inlet pipe (30).

3. A connection method for a direct-connected main shaft according to claim 1, characterized in that: A plurality of cooling fins (13) are installed on the liquid storage box (16), a mounting plate (33) is installed in the cavity (12), and a cooling fan (14) is installed on the mounting plate (33).

4. A connection method for a direct-connected main shaft according to claim 1, characterized in that: The cooling box (5) is provided with a filter screen slot (31), a filter screen installation plate (7) is slidably installed in the filter screen slot (31), and a dustproof filter screen (6) is installed on the filter screen installation plate (7).

5. The connection method of the direct-connected main shaft according to claim 1 is characterized in that: A positioning rod (35) is slidably mounted on the cooling box (5), and a positioning slot (36) adapted to the positioning rod (35) is provided on the filter screen mounting plate (7).

6. A connection method for directly connecting a main shaft according to claim 5, characterized in that: A baffle (37) is installed on the positioning rod (35), and a return spring (15) is slidably sleeved on the positioning rod (35). One end of the return spring (15) is installed on the cooling box (5), and the other end of the return spring (15) is installed on the baffle (37).

7. A connection method for directly connecting a main shaft according to claim 1, characterized in that: The coupling (24) is provided with a first connecting hole (25), the first connecting hole (25) is adapted to the motor output shaft (17), and the motor output shaft (17) is clamped in the first connecting hole (25).

8. The connection method of the direct-connected main shaft according to claim 1 is characterized in that: A second connecting hole (26) is formed at one end of the coupling (24) away from the first connecting hole (25). The second connecting hole (26) is matched with the main shaft (11), and the main shaft (11) is clamped in the second connecting hole (26).

9. A connection method for a direct-connected main shaft according to claim 1, characterized in that: The first bolt (18), the second bolt (22) and the third bolt (28) are all provided with hexagon socket grooves.

10. A connection method for a direct-connected main shaft according to claim 1, characterized in that: The cooling chamber (9) is provided with cooling oil for heat conduction. The connection points between the liquid outlet pipe (34) and the liquid inlet pipe (30) and the mounting seat (8) are all sealed.

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