Electric spindle with high heat dissipation performance

Abstract

The invention relates to a motorized spindle with high heat dissipation performance, which comprises a motorized spindle body, the motorized spindle body comprises a shell and a mounting spindle arranged in the shell, the mounting spindle is provided with a mounting bearing, the shell is provided with a cooling channel, the cooling channel allows liquid to flow through, the inner wall of the shell is provided with an elastic extension ring, and the elastic extension ring is connected with the mounting bearing. The elastic extension ring is provided with an annular groove which is communicated with the cooling channel; a contraction piece is arranged on the inner wall of the shell and used for enabling the liquid to move towards the annular groove so that the elastic extension ring can expand and contract in a reciprocating mode. By arranging the elastic extension ring, when liquid passes through and is pushed by the contraction piece, the elastic extension ring expands and contracts in a reciprocating mode, gas circulation in the installation bearing and the shell is accelerated, the overall cooling effect is improved, the temperature difference between the installation bearing and the shell is reduced, and the overall service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of electric spindles, and in particular to an electric spindle with high heat dissipation performance. Background Art

[0002] The electric spindle is a new technology product that integrates the machine tool spindle and the spindle motor. It is mainly used in CNC machine tools and micro motors.

[0003] Referring to the Chinese utility model patent with patent number CN214417679U, an electric spindle is disclosed, which includes a shell, a hollow shaft is rotatably arranged inside the shell, a rear end cover is arranged at one end of the shell, a mounting shaft is fixedly arranged on one side of the rear end cover, the mounting shaft is coaxially arranged with the shell, the hollow shaft is sleeved on the outside of the mounting shaft, a first journal with a diameter smaller than the mounting shaft is arranged at the end of the mounting shaft away from the rear end cover, a front end bearing is sleeved on the first journal, a second journal with a diameter smaller than the mounting shaft is arranged at the end of the mounting shaft close to the rear end cover, a rear end bearing is sleeved on the second journal, and the front end bearing and the rear end bearing both contact with the inner wall of the hollow shaft.

[0004] In actual use, the water cooling cycle will cause a temperature difference between the internal bearing temperature and the outer shell temperature, affecting the normal operation of the bearing, thereby reducing the service life of the bearing and the entire system, which needs to be improved. Summary of the invention

[0005] In order to increase the service life of the electric spindle, the present application provides an electric spindle with high heat dissipation.

[0006] The present application provides an electric spindle with high heat dissipation, which adopts the following technical solution:

[0007] An electric spindle with high heat dissipation comprises an electric spindle body, the electric spindle body comprises a shell and an installation spindle arranged inside the shell, the installation spindle is provided with an installation bearing, the shell is provided with a cooling channel, the cooling channel is for liquid to flow through, the inner wall of the shell is provided with an elastic extension ring, the elastic extension ring is provided with an annular groove, the annular groove is connected to the cooling channel; the inner wall of the shell is provided with a contraction piece, the contraction piece is used to make the liquid move toward the annular groove so that the elastic extension ring reciprocates to expand and contract.

[0008] By adopting the above technical solution, in actual use, when the liquid circulates in the cooling channel to cool the electric spindle body, it is difficult to obtain a good cooling effect at the mounting bearing due to the influence of its own mounting position, and the outer shell shrinks after cooling, which can easily affect the normal use of the mounting bearing. Therefore, an elastic extension ring is provided. When the liquid passes through and is pushed by the contraction part, the elastic extension ring expands and contracts reciprocatingly, which accelerates the gas circulation between the mounting bearing and the shell, improves the overall cooling effect, reduces the temperature difference between the mounting bearing and the shell, and improves the overall service life.

[0009] Optionally, the cooling channel is provided with a pressure plate 1 and a pressure plate 2, and the pressure plate 1 and the pressure plate 2 are both located at the notch of the annular groove, and the annular groove is located between the pressure plate 1 and the pressure plate 2, and the side of the pressure plate 1 away from the pressure plate 2 is the liquid inlet side, and the side of the pressure plate 2 away from the pressure plate 1 is the liquid outlet side, and the liquid moves along the liquid inlet side toward the liquid outlet side, and the pressure plate 1 is provided with a flow hole 1, and the pressure plate 2 is provided with a flow hole 2, and the size of the flow hole 1 is larger than the size of the flow hole 2.

[0010] By adopting the above technical solution, pressure plate one and pressure plate two are set. When the liquid passes through flow hole one of pressure plate one and moves to between pressure plate one and pressure plate two, since the size of flow hole two is smaller than the size of flow hole one, the liquid pressure between pressure plate one and pressure plate two increases, thereby pushing the elastic extension ring to expand. Secondly, such a setting is convenient for strengthening the liquid circulation in the annular groove and facilitating the flow circulation of the liquid, thereby improving the cooling effect at the elastic extension ring.

[0011] Optionally, the cooling channel is provided with a sliding groove, which is located on a side of the cooling channel close to the mounting spindle, the pressure plate 2 slides in the sliding groove, and the pressure plate 2 is connected to a return spring, the elastic force of the return spring limits the movement of the pressure plate 2 in a direction close to the bottom of the sliding groove, and the contraction part includes a connecting magnetic plate 1 and a connecting magnetic plate 2, the connecting magnetic plate 1 is connected to the pressure plate 2, and the connecting magnetic plate 1 is located in the sliding groove; the connecting magnetic plate 2 is located on the outer wall of the elastic extension ring, and the magnetic force of the connecting magnetic plate 2 and the magnetic force of the connecting magnetic plate 1 attract each other; when the elastic extension ring expands, the connecting magnetic plate 2 moves and aligns with the connecting magnetic plate 1, and the magnetic force of the connecting magnetic plate 2 causes the connecting magnetic plate 1 to drive the pressure plate 2 to move in the direction close to the bottom of the sliding groove, at which time the return spring is in a stretched state, and there is a gap between the pressure plate 2 and the end of the inner wall of the cooling channel away from the mounting spindle.

[0012] By adopting the above technical solution, connecting magnetic plate 1 and connecting magnetic plate 2 are set. When the liquid circulates and moves, after the liquid passes through the circulation hole 1, the pressure between the pressure plate 1 and the pressure plate 2 is enhanced due to the influence of the circulation hole 2 whose size has changed, thereby causing the elastic extension ring to expand; when the elastic extension ring expands and causes the connecting magnetic plate 2 to move to a position aligned with the connecting magnetic plate 1, the magnetic force of the connecting magnetic plate 2 causes the connecting magnetic plate 1 to drive the pressure plate 2 to move toward the bottom of the sliding groove. At this time, there is a gap between the pressure plate 2 and the inner wall of the cooling channel, thereby increasing the range of the hole and the gap for the liquid to pass through, thereby facilitating the passage of the liquid. At this time, the reset spring is in a stretched state; when the liquid passes through and the pressure between the pressure plate 1 and the pressure plate 2 is reduced, the elastic extension ring contracts and causes the connecting magnetic plate 2 to move. At this time, the connecting magnetic plate 1 moves in a direction away from the sliding groove wall due to the stretching of the reset spring, and then the above operation is repeated. In this way, the elastic extension plate is expanded and contracted reciprocatingly, which is convenient for gas circulation at the installation bearing, improves the overall cooling effect, reduces the temperature difference between the installation bearing and the housing, and improves the overall service life.

[0013] Optionally, the second pressure plate includes a fixed plate and a sliding plate, a plurality of the fixed plates are distributed along the circumference of the cooling channel, the sliding plate is located between adjacent fixed plates, and the connecting magnetic plate 1 is connected to the sliding plate.

[0014] By adopting the above technical solution, in actual use, in order to facilitate the control of the liquid circulation area of ​​the second pressure plate, a fixed plate and a sliding plate are set. By connecting the second magnetic plate to drive the movement of the sliding plate, it is convenient to control the circulation of liquid in the annular area, thereby facilitating the control of the expansion and contraction of the elastic extension plate.

[0015] Optionally, a mounting ring is provided on the inner wall of the shell, the mounting ring is provided with a mounting cavity, the elastic extension ring is located in the mounting cavity, the mounting ring is provided with an exchange hole, the exchange hole is located at one end of the mounting ring close to the mounting bearing, and the exchange hole passes through the mounting ring to the mounting cavity.

[0016] By adopting the above technical solution and setting a mounting ring, when the elastic extension plate expands, the cooled gas in the mounting cavity is discharged in the direction close to the mounting bearing, and when the elastic extension plate contracts, the gas located at the mounting bearing moves in the direction of the mounting cavity. In this way, circulating cooling of the gas is facilitated, thereby improving the overall cooling effect.

[0017] Optionally, an abutment block is provided on the inner wall of the mounting ring, and the abutment block is located on the side of the second connecting magnetic plate away from the mounting bearing, and the abutment block is used for abutment against the second connecting magnetic plate.

[0018] By adopting the above technical solution, a resistance block is set, and the movement of the connecting magnetic plate 2 is limited by the resistance block, which makes it easier for the connecting magnetic plate 2 to attract the connecting magnetic plate 1, reduces the misalignment of the connecting magnetic plate 2 with the connecting magnetic plate 1 when the elastic extension ring expands, and facilitates controlling the expansion and contraction of the elastic extension ring.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. An elastic extension ring is set. When the liquid passes through and is pushed by the contraction piece, the elastic extension ring expands and contracts back and forth, which speeds up the gas circulation inside the mounting bearing and the housing, improves the overall cooling effect, reduces the temperature difference between the mounting bearing and the housing, and improves the overall service life;

[0021] 2. Connecting magnetic plate 1 and connecting magnetic plate 2 are provided, and the expansion and contraction of the elastic extension plate are repeated through the magnetic force of the two and the flow of liquid, which is convenient for gas circulation at the installation bearing, improves the overall cooling effect, reduces the temperature difference between the installation bearing and the housing, and improves the overall service life;

[0022] 3. A mounting ring is provided. When the elastic extension plate expands, the cooled gas in the mounting cavity is discharged toward the mounting bearing. When the elastic extension plate contracts, the gas at the mounting bearing moves toward the mounting cavity. In this way, the circulating cooling of the gas is facilitated, thereby improving the overall cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of an embodiment.

[0024] Figure 2 It is a partial cross-sectional schematic diagram of an embodiment, mainly showing the cooling flow channel.

[0025] Figure 3 yes Figure 2 A is an enlarged schematic diagram.

[0026] Figure 4 This is a schematic diagram of pressure plate 2.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. electric spindle; 2. housing; 3. mounting spindle; 4. mounting bearing; 5. cooling channel; 6. elastic extension ring; 7. annular groove; 8. pressure plate one; 9. pressure plate two; 10. liquid inlet side; 11. liquid outlet side; 12. circulation hole one; 13. circulation hole two; 14. fixed plate; 15. sliding plate; 16. sliding groove; 17. mounting groove; 18. reset spring; 19. contraction piece; 20. connecting magnetic plate one; 21. connecting magnetic plate two; 22. mounting ring; 23. mounting cavity; 24. exchange hole; 25. abutment block. DETAILED DESCRIPTION

[0028] The present application is further described in detail below with reference to the accompanying drawings and embodiments.

[0029] The present application embodiment discloses an electric spindle 1 with high heat dissipation. Figure 1 , including an electric spindle 1 body, the electric spindle 1 body includes a housing 2 and a mounting spindle 3 arranged inside the housing 2, and the mounting spindle 3 is provided with a mounting bearing 4. The housing 2 is provided with a cooling channel 5, and the cooling channel 5 is for liquid to flow through. The inner wall of the housing 2 is provided with an elastic extension ring 6, and the elastic extension ring 6 is provided with an annular groove 7, the extension direction of the annular groove 7 is the direction close to the axis of the electric spindle 1, the notch of the annular groove 7 faces the cooling channel 5, and the annular groove 7 is connected to the cooling channel 5.

[0030] The cooling channel 5 is provided with a pressure plate 1 8 and a pressure plate 2 9, both of which are located at the notch of the annular groove 7, and the annular groove 7 is located between the pressure plate 1 8 and the pressure plate 2 9. In actual use, the side of the pressure plate 1 8 away from the pressure plate 2 9 is the liquid inlet side 10, and the side of the pressure plate 2 9 away from the pressure plate 1 8 is the liquid outlet side 11, and the liquid moves along the liquid inlet side 10 toward the liquid outlet side 11.

[0031] The pressure plate 18 is provided with a flow hole 12, which passes through the pressure plate 18. The pressure plate 29 is provided with a flow hole 2 13, which passes through the pressure plate 29. The penetration direction of the flow hole 12 is consistent with the penetration direction of the flow hole 2 13, and the size of the flow hole 12 is larger than the size of the flow hole 2 13.

[0032] The pressure plate 2 9 includes a fixed plate 14 and a sliding plate 15. There are multiple fixed plates 14 distributed along the circumference of the cooling channel 5. The sliding plates 15 are located between adjacent fixed plates 14. The cooling channel 5 is provided with a sliding groove 16. The sliding groove 16 is located on the side of the cooling channel 5 close to the mounting spindle 3. The sliding plate 15 is embedded in the sliding groove 16. The sliding plate 15 slides on the groove wall of the sliding groove 16. The sliding direction of the pressure plate 2 9 is the direction close to or away from the axis of the mounting spindle 3. The cooling channel 5 is provided with a mounting groove 17. The mounting groove 17 is located at the end of the cooling channel 5 away from the mounting spindle 3. A return spring 18 is provided at the bottom of the mounting groove 17. The return spring 18 is connected to the sliding plate 15. The elastic force of the return spring 18 limits the sliding plate 15 from moving in the direction close to the bottom of the sliding groove 16.

[0033] The inner wall of the shell 2 is provided with a contraction member 19, which is used to move the liquid toward the annular groove 7 so that the elastic extension ring 6 reciprocates to expand and contract. In the present application, the contraction member 19 includes a connecting magnetic plate 1 20 and a connecting magnetic plate 2 21, the connecting magnetic plate 1 20 is connected to the sliding plate 15, and the connecting magnetic plate 1 20 is located in the sliding groove 16. The connecting magnetic plate 2 21 is located at the end of the outer wall of the elastic extension ring 6 away from the mounting bearing 4, and the magnetic force of the connecting magnetic plate 2 21 and the magnetic force of the connecting magnetic plate 1 20 attract each other. In actual use, the elastic extension ring 6 can be made of rubber material, or alternatively, it can be made of silicone material.

[0034] When the elastic extension ring 6 expands, the connecting magnetic plate 21 moves and aligns with the connecting magnetic plate 1 20. The magnetic force of the connecting magnetic plate 21 causes the connecting magnetic plate 20 to drive the pressure plate 2 9 to move toward the bottom of the sliding groove 16. At this time, the reset spring 18 is in a stretched state, and there is a gap between the pressure plate 2 9 and the inner wall of the cooling channel 5 away from the mounting spindle 3.

[0035] The inner wall of the housing 2 is provided with a mounting ring 22, the mounting ring 22 is provided with a mounting cavity 23, the elastic extension ring 6 is located in the mounting cavity 23, the mounting ring 22 is provided with an exchange hole 24, the exchange hole 24 is located at one end of the mounting ring 22 close to the mounting bearing 4, and the exchange hole 24 passes through the mounting ring 22 to the mounting cavity 23. The inner wall of the mounting ring 22 is provided with a resistance block 25, the resistance block 25 is located on the side of the connecting magnetic plate 21 away from the mounting bearing 4, and the resistance block 25 is for the connecting magnetic plate 21 to resist.

[0036] The implementation principle of the electric spindle 1 with high heat dissipation in the embodiment of the present application is as follows: when liquid flows in the cooling channel, the liquid passes through the flow hole 12 of the pressure plate 1 8 and flows from the flow hole of the pressure plate 2 9 toward the liquid outlet side 11. At this time, the liquid between the pressure plate 1 8 and the pressure plate 2 9 is pressurized to cause the elastic extension ring 6 to expand. The expansion of the elastic extension ring 6 drives the connecting magnetic plate 2 21 to move and abut against the abutment block 25. At this time, the magnetic force of the connecting magnetic plate 21 causes the connecting magnetic plate 1 20 to drive the sliding plate 15 to move and put the reset spring 18 in a stretched state.

[0037] When the sliding plate 15 moves to increase the liquid circulation area, the elastic extension ring 6 contracts and separates the connecting magnetic plate 1 20 from the connecting magnetic plate 2 21. The connecting magnetic plate 21 moves so that the elastic force of the return spring 18 pulls the sliding plate 15 to move. The elastic extension ring 6 expands or contracts so that the gas in the installation cavity 23 cools down the installation bearing 4, thereby improving the overall heat dissipation performance.

[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 (1) with high heat dissipation performance, comprising an electric spindle (1) body, characterized in that: The main body of the electric spindle (1) comprises a shell (2) and a mounting spindle (3) arranged inside the shell (2), the mounting spindle (3) is provided with a mounting bearing (4), the shell (2) is provided with a cooling channel (5), the cooling channel (5) is for liquid to flow through, the inner wall of the shell (2) is provided with an elastic extension ring (6), the elastic extension ring (6) is provided with an annular groove (7), and the annular groove (7) is connected to the cooling channel (5); The inner wall of the housing (2) is provided with a contraction member (19), and the contraction member (19) is used to move the liquid toward the annular groove (7) so that the elastic extension ring (6) reciprocates in expansion and contraction.

2. The electric spindle (1) with high heat dissipation according to claim 1, characterized in that: The cooling channel (5) is provided with a pressure plate 1 (8) and a pressure plate 2 (9), and the pressure plate 1 (8) and the pressure plate 2 (9) are both located at the notch of the annular groove (7), and the annular groove (7) is located between the pressure plate 1 (8) and the pressure plate 2 (9), and the side of the pressure plate 1 (8) away from the pressure plate 2 (9) is the liquid inlet side (10), and the side of the pressure plate 2 (9) away from the pressure plate 1 (8) is the liquid outlet side (11), and the liquid moves along the liquid inlet side (10) toward the liquid outlet side (11), and the pressure plate 1 (8) is provided with a circulation hole 1 (12), and the pressure plate 2 (9) is provided with a circulation hole 2 (13), and the size of the circulation hole 1 (12) is larger than the size of the circulation hole 2 (13).

3. The electric spindle (1) with high heat dissipation according to claim 2, characterized in that: The cooling channel (5) is provided with a sliding groove (16), and the sliding groove (16) is located on a side of the cooling channel (5) close to the mounting spindle (3). The second pressure plate (9) slides in the sliding groove (16), and the second pressure plate (9) is connected with a return spring (18). The elastic force of the return spring (18) limits the movement of the second pressure plate (9) in the direction close to the bottom of the sliding groove (16). The contraction member (19) includes a connecting magnetic plate (20) and a connecting magnetic plate (21). The connecting magnetic plate (20) is connected to the second pressure plate (9), and the connecting magnetic plate (20) is located in the sliding groove (16); The second connecting magnetic plate (21) is located on the outer wall of the elastic extension ring (6), and the magnetic force of the second connecting magnetic plate (21) and the magnetic force of the first connecting magnetic plate (20) attract each other; when the elastic extension ring (6) expands, the second connecting magnetic plate (21) moves and aligns with the first connecting magnetic plate (20), and the magnetic force of the second connecting magnetic plate (21) causes the first connecting magnetic plate (20) to drive the second pressure plate (9) to move in the direction close to the bottom of the sliding groove (16), at which time the reset spring (18) is in a stretched state, and there is a gap between the second pressure plate (9) and the inner wall of the cooling channel (5) away from the end of the mounting spindle (3).

4. The electric spindle (1) with high heat dissipation according to claim 3, characterized in that: The second pressure plate (9) comprises a fixed plate (14) and a sliding plate (15), wherein a plurality of the fixed plates (14) are distributed along the circumference of the cooling channel (5), the sliding plate (15) is located between adjacent fixed plates (14), and the first connecting magnetic plate (20) is connected to the sliding plate (15).

5. The electric spindle (1) with high heat dissipation according to claim 3, characterized in that: The inner wall of the housing (2) is provided with a mounting ring (22), the mounting ring (22) is provided with a mounting cavity (23), the elastic extension ring (6) is located in the mounting cavity (23), the mounting ring (22) is provided with an exchange hole (24), the exchange hole (24) is located at one end of the mounting ring (22) close to the mounting bearing (4), and the exchange hole (24) passes through the mounting ring (22) to the mounting cavity (23).

6. The electric spindle (1) with high heat dissipation according to claim 5, characterized in that: The inner wall of the mounting ring (22) is provided with a resistance block (25), and the resistance block (25) is located on the side of the second connecting magnetic plate (21) away from the mounting bearing (4), and the resistance block (25) is used for resistance against the second connecting magnetic plate (21).

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