Electric spindle convenient for bearing lubrication

Abstract

The motorized spindle comprises a motorized spindle body, the motorized spindle body comprises a shell and a spindle part, the shell is provided with a cooling flow channel, the cooling flow channel is used for circulation of cooling liquid, the spindle part is provided with a bearing part, the bearing part is arranged on the outer wall of the spindle part in a sleeving mode, and the bearing part is arranged in the shell in a sleeving mode. The bearing part is provided with an oil filling port and a liquid discharging port; a lubricating ring is arranged on the inner wall of the shell and abuts against the inner wall of the shell, a lubricating cavity is formed in the lubricating ring, lubricating liquid flows through the lubricating cavity, the lubricating ring is provided with a communicating pipe and a liquid return pipe, the communicating pipe is communicated with the oil filling port and the lubricating cavity, the liquid return pipe is communicated with the liquid discharging port and the lubricating cavity, and the lubricating ring is provided with a driving part. And the driving piece drives the oil liquid to circulate. The bearing part lubricating device has the effect of facilitating lubricating of the bearing part and has the effect of cooling the bearing part.

Description

Technical Field

[0001] The present application relates to the field of electric spindles, and in particular to an electric spindle that facilitates bearing lubrication. Background Art

[0002] The electric spindle is a new technology that has emerged in the field of CNC machine tools, integrating the machine tool spindle and the spindle motor.

[0003] Referring to the Chinese invention patent with patent number CN109843501A, a motor spindle is disclosed, with an electromagnetic first drive system, wherein a stator unit and a rotor unit rotatable around a rotation axis are provided, the rotor unit having at least one rotor shaft and a tool receiving portion for receiving a machining tool, wherein at least one bearing unit for rotatably supporting the rotor unit is provided in the stator unit, wherein the tool receiving portion is provided in the end region of the rotor unit, wherein the stator unit has at least one stator housing with an end section at least provided in the end region of the rotor unit, and the motor spindle can be used more flexibly and / or the construction or operation economic cost is reduced. According to the present invention, this is achieved by the following measures: the stator unit includes at least one motor, which has an electromagnetic second drive system, and has a stator and a rotatable rotor, wherein the rotor has at least one rotatable housing part of the end section of the stator unit.

[0004] In actual use, the bearings inside this type of electric spindle are not easy to lubricate and need to be improved. Summary of the invention

[0005] In order to facilitate lubrication of the electric spindle bearings, the present application provides an electric spindle that facilitates bearing lubrication.

[0006] The present application provides an electric spindle that facilitates bearing lubrication, which adopts the following technical solution:

[0007] An electric spindle for facilitating bearing lubrication comprises an electric spindle body, wherein the electric spindle body comprises a shell and a spindle portion, wherein the shell is provided with a cooling channel for circulating coolant, wherein the spindle portion is provided with a bearing portion, wherein the bearing portion is sleeved on the outer wall of the spindle portion, and wherein the bearing portion is provided with a refueling port and a drain port; wherein a lubricating ring is provided on the inner wall of the shell, wherein the lubricating ring abuts against the inner wall of the shell, wherein the lubricating ring is provided with a lubricating cavity for flowing lubricant, wherein the lubricating ring is provided with a connecting pipe and a liquid return pipe, wherein the connecting pipe connects the refueling port and the lubricating cavity, wherein the liquid return pipe connects the drain port and the lubricating cavity, and wherein the lubricating ring is provided with a driving member for driving oil circulation.

[0008] By adopting the above technical solution, a lubrication ring is provided, and the oil circulation inside the lubrication ring is driven by a driving member, so that the oil enters the bearing part to lubricate the bearing of the bearing part. Secondly, the shell through which the oil flows through the cup cooling channel during the circulation process is cooled, thereby playing a role in cooling the bearing part during the circulation lubrication process, thereby improving the overall cooling effect.

[0009] Optionally, the lubrication ring is provided with a mounting block, the mounting block is provided with a mounting cavity, the mounting cavity is connected to the lubrication cavity, the mounting block is provided with a mounting tube, the bearing portion is provided with a mounting port, the mounting tube is connected to the mounting cavity and the mounting port; the lubrication ring is provided with a connecting block and a liquid return block, the connecting tube is indirectly connected to the lubrication ring through the connecting block, the liquid return tube is indirectly connected to the lubrication ring through the liquid return block, the connecting direction of the connecting block and the lubrication ring and the connecting direction of the liquid return block and the lubrication ring is the diameter direction of the lubrication ring, two mounting blocks are provided, and the connecting direction of the two mounting blocks is perpendicular to the connecting direction of the connecting block and the lubrication ring and the connecting direction of the liquid return block and the lubrication ring; The bearing part is provided with a temperature sensor, the lubrication ring is provided with a microprocessor control unit, the temperature sensor is electrically connected to the microcontrol unit, the mounting block is provided with a control component, the control component is used to control the flow of liquid, and the microcontrol unit is used to control the driving component and the control component; when the bearing part is at room temperature, the driving component drives the oil from the lubrication cavity to enter the refueling port through the connecting pipe, and re-enters the lubrication cavity from the return block; when the temperature of the bearing part rises, the temperature sensor enables the microcontrol unit to receive a signal, the microcontrol unit closes the driving component and opens the control component, and the control component drives the oil from the lubrication cavity to enter the mounting port through the mounting pipe, and enters the lubrication cavity from the connecting block and the return block.

[0010] By adopting the above technical solution and setting a mounting block, when the temperature sensor detects that the temperature of the bearing part is lower than the preset temperature during the actual oil circulation, the microcontroller unit controls the driving member to drive the oil from the lubrication chamber through the connecting pipe into the refueling port, and re-enters the lubrication chamber from the return block. By circulating the oil in this way, the path of the oil through the lubrication ring during circulation is increased, so as to better cooperate with the cooling channel of the shell for cooling, thereby improving the overall cooling effect. When the temperature rises, when the oil passes through the longer lubrication ring path, there is a large temperature difference with the bearing part when entering the bearing part. At this time, the oil circulation is likely to affect the normal operation of the bearing part and reduce the service life of the bearing part. Therefore, the temperature sensor is used to control the driving member to be closed, and the control member drives the control member to drive the oil from the lubrication chamber through the mounting pipe into the mounting port, and enters the lubrication chamber from the connecting block and the return block, thereby reducing the temperature difference between the oil and the bearing part, while achieving the cooling and lubricating effect, reducing the impact on the bearing part, thereby improving the service life of the bearing part.

[0011] Optionally, the installation cavity is provided with a drainage hole, the drainage hole is connected to the installation tube, and the cavity wall of the installation cavity is provided with a one-way conductive member, and the one-way conductive member is used to limit liquid from entering the installation cavity through the drainage hole from the installation tube.

[0012] By adopting the above technical solution, a one-way conductive member is provided to restrict the flow of liquid, thereby reducing the situation where liquid enters the installation cavity from the drainage hole when the driving member is turned on, making the circulation of oil more stable.

[0013] Optionally, the mounting block is provided with a mounting groove, the notch of the mounting groove abuts against the lubrication ring to form a mounting cavity, the drainage hole is located at the bottom of the mounting groove, the one-way conductive member includes a rotating plate, the rotating plate rotates at the notch of the mounting groove, the rotating plate is used to close the mounting groove, the notch of the mounting groove is provided with a limiting convex strip, and the limiting convex strip is used to limit the rotating plate from detaching from the mounting groove.

[0014] By adopting the above technical scheme, a rotating plate is set. When the temperature of the bearing part does not reach the preset temperature, the oil enters the oil filling port through the connecting pipe and re-enters the lubrication cavity from the return block. At this time, the rotating plate abuts against the limiting convex strip to close the drainage hole, thereby reducing the liquid flowing into the drainage hole; when the temperature of the bearing part reaches the preset temperature, the temperature sensor controls the control component to drive the control component to drive the oil from the lubrication cavity through the mounting pipe into the mounting port, and enters the lubrication cavity from the connecting block and the return block. At this time, the oil drives the rotating plate to rotate; through the above scheme, it is convenient to control the oil circulation.

[0015] Optionally, a positioning groove is provided on the wall of the mounting groove, a positioning magnetic stripe 1 is provided on the bottom of the positioning groove, and a positioning magnetic stripe 2 is provided on the rotating plate. The positioning magnetic stripe 2 is located at one end of the rotating plate close to the bottom of the mounting groove, and the magnetic forces of the positioning magnetic stripe 2 and the positioning magnetic stripe 1 attract each other; when the positioning magnetic stripe 1 conflicts with the positioning magnetic stripe 2, the rotating plate tends to rotate toward the groove opening of the mounting groove.

[0016] By adopting the above technical solution, when the rotating plate keeps the positioning magnetic strip one against the positioning magnetic strip two, the rotating plate tends to rotate toward the notch of the installation groove. Therefore, when the control part controls the flow of liquid, the movement of the liquid plays a limiting role on the rotating plate, which facilitates the movement of the liquid toward the bearing part. When the temperature drops and the temperature sensor controls the control part to close, the magnetic force of the positioning magnetic strip one and the positioning magnetic strip two is not enough to fix the rotating plate. Therefore, the rotating plate rotates and closes the drainage hole, thereby facilitating the control of the oil flow.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. A lubrication ring is provided, and the oil inside the lubrication ring is driven to circulate through a driving member, so that the oil enters the bearing part to lubricate the bearing of the bearing part. Secondly, the shell through which the oil flows through the cooling channel during the circulation process is cooled, thereby playing a role in cooling the bearing part during the circulation lubrication process, thereby improving the overall cooling effect;

[0019] 2. The installation block and the temperature sensor are set, and the driving part is controlled to be closed through the temperature sensor, and the control part drives the oil to enter the installation port from the lubrication cavity through the installation pipe, and enter the lubrication cavity from the connecting block and the return block, thereby reducing the temperature difference between the oil and the bearing part, while achieving the cooling and lubricating effect, reducing the impact on the bearing part, thereby improving the service life of the bearing part;

[0020] 3. Positioning magnetic strip 1 and positioning magnetic strip 2 are set. When the rotating plate keeps positioning magnetic strip 1 against positioning magnetic strip 2, the rotating plate tends to rotate toward the notch of the installation groove. Therefore, when the control part controls the flow of liquid, the movement of the liquid plays a limiting role on the rotating plate, which facilitates the movement of the liquid toward the bearing part. When the temperature drops and the temperature sensor controls the control part to close, the magnetic force of positioning magnetic strip 1 and positioning magnetic strip 2 is not enough to fix the rotating plate. Therefore, the rotating plate rotates and closes the drainage hole, thereby facilitating the control of oil flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional schematic diagram of an embodiment.

[0022] Figure 2 It is an overall schematic diagram of the lubrication ring.

[0023] Figure 3 It is a partial cross-sectional schematic diagram of an embodiment, mainly showing the mounting block.

[0024] Figure 4 yes Figure 3 A is an enlarged schematic diagram.

[0025] Figure 5 It is the control flow chart of the micro control unit.

[0026] Explanation of the reference numerals in the accompanying drawings: 1. Electric spindle body; 2. Shell; 3. Spindle part; 4. Cooling channel; 5. Lubricating ring; 6. Lubricating cavity; 7. Bearing part; 8. Oil filling port; 9. Drain port; 10. Connecting block; 11. Liquid return block; 12. Connecting pipe; 13. Liquid return pipe; 14. Driving member; 15. Mounting block; 16. Mounting cavity; 17. Mounting pipe; 19. Temperature sensor; 20. Micro control unit; 21. Control member; 22. Mounting groove; 23. Drain hole; 24. One-way conducting member; 25. Rotating plate; 26. Limiting convex strip; 27. Positioning groove; 28. Positioning magnetic strip one; 29. ​​Positioning magnetic strip two. DETAILED DESCRIPTION

[0027] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0028] The present application embodiment discloses an electric spindle that facilitates bearing lubrication. Figure 1 , including an electric spindle body 1, the electric spindle body 1 includes a shell 2 and a spindle part 3, the shell 2 is provided with a cooling channel 4, and the cooling channel 4 is for the circulation of coolant. The inner wall of the shell 2 is provided with a lubrication ring 5, the lubrication ring 5 abuts against the inner wall of the shell 2, and the lubrication ring 5 is provided with a lubrication cavity 6, and the lubrication cavity 6 is for the lubrication liquid to flow through.

[0029] The main shaft portion 3 is provided with a bearing portion 7, and the bearing portion 7 is sleeved on the outer wall of the main shaft portion 3. The bearing portion 7 is provided with a refueling port 8 and a drain port 9. The lubricating ring 5 is provided with a connecting block 10 and a liquid return block 11. The connecting pipe 12 and the liquid return pipe 13 are both located at one end of the lubricating ring 5 close to the bearing portion 7. The connecting line direction of the connection between the connecting block 10 and the lubricating ring 5 and the connection between the liquid return block 11 and the lubricating ring 5 is the diameter direction of the lubricating ring 5. The connecting block 10 is provided with a connecting pipe 12, and the connecting pipe 12 is connected to the connecting block 10 so as to indirectly connect the refueling port 8 and the lubricating chamber 6. The liquid return pipe 13 is provided with a liquid return pipe 13, and the liquid return pipe 13 is connected to the liquid return block 11 so as to connect the drain port 9 and the lubricating chamber 6. The lubricating ring 5 is provided with a driving member 14, and the driving member 14 is used to drive the oil circulation.

[0030] The lubricating ring 5 is provided with a mounting block 15, and the mounting block 15 is located at one end of the lubricating ring 5 close to the bearing part 7, and the mounting block 15 is located between the connecting pipe 12 and the liquid return pipe 13. The mounting block 15 is provided with a mounting cavity 16, and the mounting cavity 16 is connected to the lubricating cavity 6. The mounting block 15 is provided with a mounting tube 17, and the mounting tube 17 is located at one end of the mounting block 15 close to the bearing part 7. The bearing part 7 is provided with a mounting port, and the mounting tube 17 connects the mounting cavity 16 and the mounting port. In the present application, two mounting blocks 15 are provided, and the connection direction of the two mounting blocks 15 is perpendicular to the connection direction of the connection between the connecting block 10 and the lubricating ring 5 and the connection between the liquid return block 11 and the lubricating ring 5.

[0031] The bearing part 7 is provided with a temperature sensor 19, and the temperature sensor 19 is used to detect the temperature change of the bearing part 7. The lubricating ring 5 is provided with a micro control unit 20, and the temperature sensor 19 is electrically connected to the micro control unit 20. The mounting block 15 is provided with a control member 21, and the control member 21 is used to control the flow of the liquid. The micro control unit 20 is used to control the driving member 14 and the control member 21.

[0032] When the temperature of the bearing part 7 is lower than the preset temperature, the micro control unit 20 drives the driving member 14 to control the oil to enter the oil filling port 8 from the lubrication chamber 6 through the connecting pipe 12, and re-enter the lubrication chamber 6 from the return block 11. When the temperature of the bearing part 7 rises and is higher than the preset temperature, the temperature sensor 19 enables the micro control unit 20 to receive a signal, the micro control unit 20 closes the driving member 14 and opens the control member 21, and the control member 21 drives the oil to enter the installation port from the lubrication chamber 6 through the installation pipe 17, and enter the lubrication chamber 6 from the connecting block 10 and the return block. In actual use, the control member 21 and the driving member 14 are both micro pumps, and the power of the control member 21 is greater than the power of the driving member 14, and the flow rate of the oil when driven by the control member 21 is greater than the flow rate of the oil when driven by the driving member 14. Through such a setting, when the temperature rises to the set temperature, the oil is transported through the control member 21, and the oil flow rate is accelerated to better take away the heat of the bearing part 7, and the temperature difference between the oil and the bearing part 7 is reduced.

[0033] The mounting block 15 is provided with a mounting groove 22, the notch of the mounting groove 22 abuts against the lubricating ring 5 to form a mounting cavity 16, and a drainage hole 23 is provided at the bottom of the mounting groove 22, the drainage hole 23 is connected to the mounting pipe 17, and the mounting pipe 17 is indirectly connected to the lubricating cavity 6 through the drainage hole 23. A one-way guide 24 is provided on the wall of the mounting cavity 16, and the one-way guide 24 is used to limit the liquid from the mounting pipe 17 to enter the mounting cavity 16 through the drainage hole 23.

[0034] The one-way conducting member 24 includes a rotating plate 25 , which rotates on the notch of the mounting slot 22 and is used to close the mounting slot 22 . The notch of the mounting slot 22 is provided with a limiting convex strip 26 , which is used to abut against the rotating plate 25 so as to limit the rotating plate 25 from leaving the mounting slot 22 .

[0035] The wall of the installation slot 22 is provided with a positioning slot 27, the bottom of the positioning slot 27 is provided with a positioning magnetic strip 1 28, and the rotating plate 25 is provided with a positioning magnetic strip 29. The positioning magnetic strip 29 is located at one end of the rotating plate 25 close to the bottom of the installation slot 22. The magnetic forces of the positioning magnetic strip 29 and the positioning magnetic strip 1 28 attract each other, and the magnetic forces of the positioning magnetic strip 1 28 and the positioning magnetic strip 2 29 are not enough to keep the rotating plate 25 in a state of contacting the wall of the positioning slot 27. When the positioning magnetic strip 1 28 contacts the positioning magnetic strip 2 29, the rotating plate 25 has a tendency to rotate toward the slot opening of the installation slot 22.

[0036] The implementation principle of the electric spindle for bearing lubrication in the embodiment of the present application is as follows: in actual use, when the electric spindle body 1 is running, the temperature of the bearing part 7 is lower than the preset temperature, so the microcontroller unit 20 controls the driving member 14 to start, and the driving member 14 controls the liquid in the lubrication chamber 6 to move toward the bearing part 7 through the connecting pipe 12, and after circulating in the bearing part 7, it returns to the lubrication chamber 6 through the return pipe 13. At this time, the path of the oil moving in the lubrication chamber 6 during circulation is larger, which is convenient for indirect cooling through the housing 2.

[0037] When the temperature of the bearing part 7 reaches the preset temperature, the micro control unit 20 turns off the driving part 14 and starts the driving control part 21. The control part 21 controls the oil in the lubricating cavity 6 to be drawn toward the mounting tube 17 so as not to move, and after circulating in the bearing part 7, the oil returns to the lubricating cavity 6 through the return pipe 13 and the connecting pipe 12. Through the above method, the flow rate of the oil is increased, the circulation path of the oil in the lubricating cavity 6 is reduced, and the temperature difference between the oil and the bearing part 7 after cooling is reduced.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric spindle for facilitating bearing lubrication, comprising an electric spindle body (1), characterized in that: The electric spindle body (1) comprises a shell (2) and a spindle part (3), the shell (2) is provided with a cooling channel (4), the cooling channel (4) is for cooling liquid to flow, the spindle part (3) is provided with a bearing part (7), the bearing part (7) is sleeved on the outer wall of the spindle part (3), and the bearing part (7) is provided with a refueling port (8) and a drain port (9); The inner wall of the housing (2) is provided with a lubricating ring (5), the lubricating ring (5) abuts against the inner wall of the housing (2), the lubricating ring (5) is provided with a lubricating cavity (6), the lubricating cavity (6) is for lubricating liquid to flow through, the lubricating ring (5) is provided with a connecting pipe (12) and a liquid return pipe (13), the connecting pipe (12) connects the oil filling port (8) and the lubricating cavity (6), the liquid return pipe (13) connects the liquid discharge port (9) and the lubricating cavity (6), and the lubricating ring (5) is provided with a driving member (14), the driving member (14) drives the oil circulation.

2. The electric spindle for facilitating bearing lubrication according to claim 1, characterized in that: The lubricating ring (5) is provided with a mounting block (15), the mounting block (15) is provided with a mounting cavity (16), the mounting cavity (16) is connected to the lubricating cavity (6), the mounting block (15) is provided with a mounting tube (17), the bearing portion (7) is provided with a mounting port, and the mounting tube (17) is connected to the mounting cavity (16) and the mounting port; The lubricating ring (5) is provided with a connecting block (10) and a liquid return block (11); the connecting pipe (12) is indirectly connected to the lubricating ring (5) through the connecting block (10); the liquid return pipe (13) is indirectly connected to the lubricating ring (5) through the liquid return block (11); the connection direction of the connecting portion between the connecting block (10) and the lubricating ring (5) and the connection direction of the liquid return block (11) and the lubricating ring (5) is the diameter direction of the lubricating ring (5); two mounting blocks (15) are provided, and the connection direction of the two mounting blocks (15) is perpendicular to the connection direction of the connecting portion between the connecting block (10) and the lubricating ring (5) and the connection direction of the liquid return block (11) and the lubricating ring (5); The bearing portion (7) is provided with a temperature sensor (19), the lubricating ring (5) is provided with a microprocessor control unit, the temperature sensor (19) is electrically connected to the microcontrol unit (20), the mounting block (15) is provided with a control member (21), the control member (21) is used to control the flow of liquid, and the microcontrol unit (20) is used to control the driving member (14) and the control member (21); When the bearing part (7) is at room temperature, the driving member (14) drives the oil from the lubricating cavity (6) through the connecting pipe (12) to enter the oil filling port (8), and re-enters the lubricating cavity (6) from the return block (11); when the temperature of the bearing part (7) rises, the temperature sensor (19) enables the microcontrol unit (20) to receive a signal, the microcontrol unit (20) turns off the driving member (14) and turns on the control member (21), and the control member (21) drives the oil from the lubricating cavity (6) through the mounting pipe (17) to enter the mounting port, and enters the lubricating cavity (6) from the connecting block (10) and the return block.

3. The electric spindle for facilitating bearing lubrication according to claim 2, characterized in that: The installation cavity (16) is provided with a drainage hole (23), the drainage hole (23) is connected to the installation tube (17), and the cavity wall of the installation cavity (16) is provided with a one-way conductive member (24), and the one-way conductive member (24) is used to limit liquid from entering the installation cavity (16) through the drainage hole (23) from the installation tube (17).

4. The electric spindle for facilitating bearing lubrication according to claim 3, characterized in that: The mounting block (15) is provided with a mounting groove (22), the groove opening of the mounting groove (22) abuts against the lubrication ring (5) to form a mounting cavity (16), the drainage hole (23) is located at the groove bottom of the mounting groove (22), the one-way conductive member (24) comprises a rotating plate (25), the rotating plate (25) rotates at the groove opening of the mounting groove (22), the rotating plate (25) is used to close the mounting groove (22), the groove opening of the mounting groove (22) is provided with a limiting convex strip (26), the limiting convex strip (26) is used to limit the rotating plate (25) from leaving the mounting groove (22).

5. The electric spindle for facilitating bearing lubrication according to claim 4, characterized in that: The groove wall of the installation groove (22) is provided with a positioning groove (27), the groove bottom of the positioning groove (27) is provided with a positioning magnetic stripe (28), the rotating plate (25) is provided with a positioning magnetic stripe (29), the positioning magnetic stripe (29) is located at one end of the rotating plate (25) close to the groove bottom of the installation groove (22), and the magnetic forces of the positioning magnetic stripe (29) and the positioning magnetic stripe (28) attract each other; When the first positioning magnetic strip (28) contacts the second positioning magnetic strip (29), the rotating plate (25) tends to rotate toward the notch of the installation slot (22).

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