Electric spindle with good heat dissipation effect

Abstract

The invention relates to an electric spindle with a good heat dissipation effect, the electric spindle comprises a spindle core, a motor rotor, a motor stator and a shell which are coaxially arranged, a first cooling channel and a second cooling channel are formed in the shell, the first cooling channel is located on the side, away from the motor stator, of the second cooling channel, and a first liquid outlet and a second liquid outlet are formed in the shell; a liquid inlet is formed in the outer side wall of the shell, a conversion cavity is formed in the shell, a movable block is rotationally connected to the shell, the movable block is located in the conversion cavity and used for covering the first cooling channel or the second cooling channel, and an adjusting assembly is arranged on the shell and used for rotating and positioning the movable block. The cooling liquid path in the motorized spindle can be switched and adjusted according to the actual environment temperature condition and the working duration of the motorized spindle, waste of the cooling liquid can be reduced while the heat dissipation requirement of the motorized spindle is met, and the service life of the motorized spindle can be prolonged.

Description

Technical Field

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

[0002] The electric spindle is a device that integrates the machine tool spindle and the spindle motor. It is widely used in the field of CNC machine tools. It effectively solves the problems of low angular acceleration (deceleration) caused by vibration, high heat generation and large inertia of traditional machine tool spindles driven by belts, gears or direct connection through couplings.

[0003] For example, the utility model patent with patent announcement number CN209716474U discloses an electric spindle, including a coaxially arranged spindle core, a motor rotor, a motor stator, a cooling jacket and a shell, the motor rotor is sleeved on the outside of the spindle core, the motor stator is sleeved on the outside of the motor rotor, the motor rotor and the motor stator are rotatably connected, the cooling jacket is sleeved on the outside of the motor stator, the shell is sleeved on the outside of the cooling jacket, a cooling channel is provided between the cooling jacket and the shell, the cooling channel is connected to an external coolant, and the shell is made of carbon fiber material.

[0004] When the above-mentioned electric spindle is used in a cold environment, the cooling effect of the coolant may be much greater than the heat generated by the electric spindle, which will cause a waste of coolant and needs to be improved. Summary of the invention

[0005] In order to improve the problem that when the electric spindle works in a cold environment, the cooling effect of the coolant may be much greater than the heat generated by the electric spindle, which will cause waste of coolant, the present application provides an electric spindle with good heat dissipation effect.

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

[0007] An electric spindle with good heat dissipation effect comprises a coaxially arranged spindle core, a motor rotor, a motor stator and a shell, wherein a first cooling channel and a second cooling channel are provided in the shell, wherein the first cooling channel is located on a side of the second cooling channel away from the motor stator, a first liquid outlet and a second liquid outlet are provided on the shell, wherein the first liquid outlet is connected to the first cooling channel, wherein the second liquid outlet is connected to the second cooling channel, wherein a liquid inlet is provided on the outer side wall of the shell, wherein a conversion cavity is provided in the shell, wherein the conversion cavity is connected to the liquid inlet and the first cooling channel as well as the second cooling channel;

[0008] A movable block is rotatably connected to the outer shell, the movable block is located in the conversion chamber, and the movable block is used to cover the cooling channel one or the cooling channel two. When the movable block is located between the cooling channel one and the cooling channel two, the cooling channel one and the cooling channel two are both connected to the conversion chamber. An adjustment component is provided on the outer shell, and the adjustment component is used to rotate and position the movable block.

[0009] By adopting the above technical solution, when the working environment temperature is high and the electric spindle works for a long time, the movable block can be rotated so that the movable block is located between cooling channel one and cooling channel two and positioned. At this time, the conversion cavity and cooling channel one and cooling channel two are all connected, and the coolant flows through cooling channel one and cooling channel two at the same time, thereby increasing the cooling area and improving the heat dissipation efficiency of the electric spindle.

[0010] When the working environment is cold, the movable block can be rotated so that the movable block covers the cooling channel one and is positioned together. At this time, the conversion cavity and cooling channel two are connected, and the coolant is passed into the liquid inlet. The coolant flows through cooling channel two and takes away the heat generated by the electric spindle. On the one hand, while meeting the heat dissipation demand of the electric spindle, the coolant flow rate is reduced, thereby reducing the waste of coolant. On the other hand, since the heat is mainly generated by the internal operation of the electric spindle when the working environment is cold, and cooling channel two is closer to the inside of the electric spindle, the heat generated by the electric spindle can be taken away more promptly through cooling channel two, thereby suppressing the internal temperature rise of the electric spindle, which is beneficial to improving the stability of the electric spindle and extending the service life of the electric spindle.

[0011] When the working environment temperature is higher than the internal temperature of the electric spindle and the working time of the electric spindle is short, the movable block can be rotated so that the movable block covers the cooling channel two and is positioned. At this time, the conversion cavity and the cooling channel one are connected. Since the cooling channel one is closer to the outer shell and closer to the outside world, after the coolant is passed into the liquid inlet, the heat transmitted to the electric spindle from the outside world can be taken away in time, thereby better suppressing the internal temperature rise of the electric spindle, which is beneficial to improving the stability of the electric spindle and extending the service life of the electric spindle.

[0012] The coolant path inside the electric spindle can be switched and adjusted according to the actual ambient temperature conditions and the working time of the electric spindle. This can reduce the waste of coolant while meeting the heat dissipation needs of the electric spindle and help extend the service life of the electric spindle.

[0013] Optionally, the adjustment assembly includes a gear coaxially arranged on the movable block, an adjustment block rotatably connected to the housing, and an insert block slidably connected to the adjustment block, the adjustment block is provided with a tooth surface, the tooth surface is meshed with the gear, the insert block is located on the outer side of the housing, the sliding direction of the insert block is parallel to the rotation axis of the movable block, the housing is provided with a slot 1, a slot 2 and a slot 3, and the slot 1, the slot 2 and the slot 3 are all for the insert block to be inserted into;

[0014] When the insert block is inserted into the slot one, the movable block covers the cooling channel two; when the insert block is inserted into the slot two, the movable block covers the cooling channel one; when the insert block is inserted into the slot three, the movable block is located between the cooling channel one and the cooling channel two.

[0015] By adopting the above technical solution, when the movable block needs to be rotated, the insert block is moved so that the insert block is disengaged from slot one / slot two / slot three, and then the insert block is pushed to drive the adjustment block to rotate. The adjustment block drives the gear to rotate through the meshing cooperation between the tooth surface and the gear, so as to rotate the movable block. When the movable block moves to the corresponding position, the insert block is moved so that the insert block is inserted into slot one / slot two / slot three, so that the movable block can be positioned without the aid of other tools, making it more convenient to position and rotate the movable block.

[0016] Optionally, a limiting groove 1 is provided on the shell, the insert block is located in the limiting groove 1, the slot 1, the slot 2 and the slot 3 are all connected to the limiting groove 1, and when the insert block abuts against two opposite inner walls of the limiting groove 1, the insert block is aligned with the slot 1 and the slot 2 respectively.

[0017] By adopting the above technical solution, the inner wall of the limiting groove 1 abuts against the plug-in block to limit the position of the plug-in block, so that the plug-in block is aligned with the slot 1 / slot 2, and there is no need for the staff to align it visually, which reduces the situation where the plug-in block gets stuck when being inserted into the slot 1 / slot 2, making it more convenient to position the movable block.

[0018] Optionally, the minimum distances from the ends of slot one, slot two and slot three away from the limiting slot one to the adjustment block are all smaller than the length of the insertion block along the sliding direction.

[0019] By adopting the above technical solution, when the inserting block is inserted into the slot one / slot two / slot three, the situation where the inserting block is separated from the adjusting block is reduced.

[0020] Optionally, the insert block includes a sliding portion slidably connected to the adjustment block and a limiting portion provided on the sliding portion, the limiting portion is located on one side of the sliding portion along the rotation direction of the adjustment block, and a limiting groove 2 for accommodating the limiting portion is provided on the adjustment block.

[0021] By adopting the above technical solution, the limiting part is limited by the inner wall of the limiting groove 2 abutting against the limiting part, thereby reducing the situation where the insert block separates from the adjusting block in the radial direction of the adjusting block during the movement of the insert block.

[0022] Optionally, the cooling channel 1 and the cooling channel 2 are both spirally arranged around the outer circumference of the motor stator, and the cooling channel 1 and the cooling channel 2 are arranged in an alternating manner.

[0023] By adopting the above technical solution, the cooling area of ​​the coolant is increased and the heat dissipation effect of the electric spindle is improved.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The coolant path inside the electric spindle can be switched and adjusted according to the actual ambient temperature conditions and the working time of the electric spindle, which can reduce the waste of coolant while meeting the heat dissipation requirements of the electric spindle and help extend the service life of the electric spindle;

[0026] 2. Through the cooperation between the insert block, the adjustment block and the gear, the movable block can be rotated and positioned without the aid of other tools, making it more convenient to position and rotate the movable block;

[0027] 3. The inner wall of the limiting slot 1 abuts against the plug-in block to limit the plug-in block, so that the plug-in block is aligned with the slot 1 / slot 2, and the staff does not need to align it visually, making it more convenient to position the movable block. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a cross-sectional view of an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the structure of a part of an embodiment of the present application.

[0030] Figure 3 for Figure 1 The enlarged view of part A in the middle mainly shows the structure of the conversion cavity.

[0031] Figure 4 for Figure 2 The enlarged view of part B in the middle mainly shows the structure of slot one, slot two and slot three.

[0032] Figure 5 This is a partial structural diagram of an embodiment of the present application, mainly showing the structure of the adjustment component.

[0033] Figure 6 This is a partial structural diagram of an embodiment of the present application, mainly showing the connection structure between the gear and the movable block.

[0034] Explanation of the reference numerals in the accompanying drawings: 1. spindle core; 2. motor rotor; 3. motor stator; 4. housing; 41. cooling channel one; 42. cooling channel two; 43. liquid outlet one; 44. liquid outlet two; 45. liquid inlet; 46. conversion chamber; 47. limit slot one; 5. movable block; 6. adjustment component; 61. gear; 62. adjustment block; 621. limit slot two; 622. slide slot; 63. insert block; 631. sliding part; 632. limit part; 7. tooth surface; 8. slot one; 9. slot two; 10. slot three. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The present application discloses an electric spindle with good heat dissipation effect. Figure 1 The electric spindle with good heat dissipation effect includes a spindle core 1, a motor rotor 2, a motor stator 3 and a shell 4. The motor rotor 2 is sleeved on the outside of the spindle core 1, the motor stator 3 is sleeved on the outside of the motor rotor 2, and the motor rotor 2 is rotatably connected to the motor stator 3. The shell 4 is sleeved on the outside of the motor stator 3, and the spindle core 1, the motor rotor 2, the motor stator 3 and the shell 4 are coaxially arranged.

[0037] See also Figure 1-3 A cooling channel 1 41 and a cooling channel 2 42 are provided in the shell 4. The cooling channel 1 41 is located on the side of the cooling channel 2 42 away from the motor stator 3. The cooling channel 1 41 and the cooling channel 2 42 are both spirally arranged around the outer circumference of the motor stator 3, and the cooling channel 1 41 and the cooling channel 2 42 are staggered. A liquid outlet 1 43 and a liquid outlet 2 44 are provided on the outer wall of the shell 4. The liquid outlet 1 43 is connected to the cooling channel 1 41, and the liquid outlet 2 44 is connected to the cooling channel 2 42. A liquid inlet 45 is also provided on the outer wall of the shell 4. A conversion cavity 46 is provided in the shell 4. The conversion cavity 46 connects the liquid inlet 45 with the cooling channel 1 41 and the cooling channel 2 42.

[0038] See also Figure 1-3 A movable block 5 is rotatably connected to the housing 4, and the movable block 5 is located in the conversion chamber 46, and the rotation axis of the movable block 5 is perpendicular to the axis of the spindle core 1. The movable block 5 is used to cover the cooling channel 1 41 or the cooling channel 2 42. The length of the end of the movable block 5 away from its rotation axis is less than the length between the cooling channel 1 41 and the cooling channel 2 42. When the end of the movable block 5 away from its rotation axis is located between the cooling channel 1 41 and the cooling channel 2 42, the cooling channel 1 41 and the cooling channel 2 42 are both connected to the conversion chamber 46. When the movable block 5 covers the cooling channel 1 41, the cooling channel 2 42 is connected to the conversion chamber 46. When the movable block 5 covers the cooling channel 2 42, the cooling channel 1 41 is connected to the conversion chamber 46.

[0039] See also Figure 1-6 A limiting groove 47 is provided on the outer wall of the housing 4, and an adjusting assembly 6 is provided on the housing 4. The adjusting assembly 6 includes a gear 61, an adjusting block 62 and an insert block 63. The gear 61 is rotatably connected to the housing 4 and is coaxially fixed with the movable block 5. The adjusting block 62 is rotatably connected to the housing 4, and the rotation axis of the adjusting block 62 is parallel to the rotation axis of the gear 61. A tooth surface 7 is formed on the outer wall of the adjusting block 62, and the tooth surface 7 is meshed with the gear 61.

[0040] See also Figure 1-6 The outer wall of the adjusting block 62 is provided with a second limiting groove 621 and a slide groove 622, both of which penetrate the adjusting block 62 along the rotation axis of the adjusting block 62, and the second limiting groove 621 is located on one side of the slide groove 622 along the rotation direction of the adjusting block 62 and is connected to the slide groove 622, the inserting block 63 is located on the outer side of the shell 4 and is located in the first limiting groove 47, the inserting block 63 includes a sliding portion 631 and a limiting portion 632, the sliding portion 631 is slidably connected in the slide groove 622, and the sliding direction of the sliding portion 631 is parallel to the rotation axis of the adjusting block 62, the limiting portion 632 is located in the second limiting groove 621 and is fixedly connected to the sliding portion 631, and the limiting portion 632 is limited by the inner wall of the second limiting groove 621 abutting against the limiting portion 632, thereby reducing the situation in which the inserting block 63 is separated from the adjusting block 62 along the radial direction of the adjusting block 62 during the movement of the inserting block 63.

[0041] See also Figure 1-6 , a slot 1 8, a slot 2 9 and a slot 3 10 are also provided on the outer wall of the shell 4, and the slots 1 8, the slots 2 9 and the slots 3 10 are located on the same side of the limiting groove 1 47 and are all connected to the limiting groove 1 47, the slot 3 10 is located between the slots 1 8 and the slots 2 9, and the slots 1 8, the slots 2 9 and the slots 3 10 are all for the insertion block 63 to be inserted, and the minimum distance from the ends of the slots 1 8, the slots 2 9 and the slots 3 10 away from the limiting groove 1 47 to the adjustment block 62 is less than the length of the sliding portion 631 along its sliding direction, and the "" here refers to the sliding portion 631.

[0042] When the insert block 63 is inserted into the slot 1 8, the movable block 5 covers the cooling channel 2 42. When the insert block 63 is inserted into the slot 2 9, the movable block 5 covers the cooling channel 1 41. When the insert block 63 is inserted into the slot 3 10, the end of the movable block 5 away from its rotation axis is located between the cooling channel 1 41 and the cooling channel 2 42. When the sliding portion 631 abuts against the two opposite inner walls of the limiting groove 1 47, the insert block 63 is aligned with the slot 1 8 and the slot 2 9 respectively.

[0043] In actual use, when the movable block 5 needs to be rotated, the sliding part 631 is moved to make the insert block 63 disengage from slot one 8 / slot two 9 / slot three 10, and then the sliding part 631 is pushed to drive the adjusting block 62 to rotate. The adjusting block 62 drives the gear 61 to rotate through the meshing cooperation between the tooth surface 7 and the gear 61, so as to rotate the movable block 5. When the movable block 5 moves to the corresponding position, the sliding part 631 is moved to make the insert block 63 snap into the slot one 8 / slot two 9 / slot three 10, so as to position the movable block 5. The movable block 5 can be rotated or positioned through the cooperation among the insert block 63, the adjusting block 62 and the gear 61 without the aid of other tools, making it more convenient to position and rotate the movable block 5.

[0044] The implementation principle of an electric spindle with good heat dissipation effect in the embodiment of the present application is as follows:

[0045] When the working environment temperature is high and the electric spindle has been working for a long time, the movable block 5 can be rotated so that the movable block 5 is located between the cooling channel 1 41 and the cooling channel 2 42, and the insert block 63 is inserted into the slot 3 10 to position the movable block 5. At this time, the conversion cavity 46 and the cooling channel 1 41 and the cooling channel 2 42 are all connected, and the coolant flows through the cooling channel 1 41 and the cooling channel 2 42 at the same time, which increases the cooling area and improves the heat dissipation efficiency of the electric spindle.

[0046] When the working environment is cold, the movable block 5 can be rotated so that the movable block 5 covers the cooling channel 1 41 and the insert block 63 is inserted into the slot 2 9 to position the movable block 5. At this time, the conversion cavity 46 and the cooling channel 2 42 are connected, and the coolant is passed into the liquid inlet 45. The coolant flows through the cooling channel 2 42 to take away the heat generated by the electric spindle. On the one hand, while meeting the heat dissipation demand of the electric spindle, the coolant flow rate is reduced, thereby reducing the waste of coolant. On the other hand, since the heat is mainly generated by the internal operation of the electric spindle when the working environment is cold, and the cooling channel 2 42 is closer to the inside of the electric spindle, the heat generated by the electric spindle can be taken away more promptly through the cooling channel 2 42, thereby suppressing the internal temperature rise of the electric spindle, which is beneficial to improving the stability of the electric spindle and extending the service life of the electric spindle.

[0047] When the working environment temperature is higher than the internal temperature of the electric spindle and the working time of the electric spindle is short, the movable block 5 can be rotated so that the movable block 5 covers the cooling channel 2 42 and the insert block 63 is inserted into the slot 1 8 to position the movable block 5. At this time, the conversion cavity 46 and the cooling channel 1 41 are connected. Since the cooling channel 1 41 is closer to the outer side of the shell 4, after the coolant is passed into the liquid inlet 45, the heat transmitted to the electric spindle from the outside can be taken away in time, thereby better suppressing the internal temperature rise of the electric spindle, which is beneficial to improving the stability of the electric spindle and extending the service life of the electric spindle.

[0048] The coolant path inside the electric spindle can be switched and adjusted according to the actual ambient temperature conditions and the working time of the electric spindle. This can reduce the waste of coolant while meeting the heat dissipation needs of the electric spindle and help extend the service life of the electric spindle.

[0049] 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 with good heat dissipation effect, comprising a coaxially arranged spindle core (1), a motor rotor (2), a motor stator (3) and a housing (4), characterized in that: The shell (4) is provided with a cooling channel 1 (41) and a cooling channel 2 (42), the cooling channel 1 (41) being located on a side of the cooling channel 2 (42) away from the motor stator (3), the shell (4) is provided with a liquid outlet 1 (43) and a liquid outlet 2 (44), the liquid outlet 1 (43) being connected to the cooling channel 1 (41), the liquid outlet 2 (44) being connected to the cooling channel 2 (42), the outer wall of the shell (4) being provided with a liquid inlet (45), the shell (4) being provided with a conversion cavity (46), the conversion cavity (46) being connected to the liquid inlet (45) and the cooling channel 1 (41) as well as the cooling channel 2 (42); A movable block (5) is rotatably connected to the outer shell (4), the movable block (5) is located in the conversion chamber (46), and the movable block (5) is used to cover the cooling channel 1 (41) or the cooling channel 2 (42). When the movable block (5) is located between the cooling channel 1 (41) and the cooling channel 2 (42), both the cooling channel 1 (41) and the cooling channel 2 (42) are connected to the conversion chamber (46). An adjustment component (6) is provided on the outer shell (4), and the adjustment component (6) is used to rotate and position the movable block (5).

2. The electric spindle with good heat dissipation effect according to claim 1 is characterized in that: The adjusting assembly (6) comprises a gear (61) coaxially arranged on the movable block (5), an adjusting block (62) rotatably connected to the housing (4), and an insert block (63) slidably connected to the adjusting block (62); the adjusting block (62) is provided with a tooth surface (7), the tooth surface (7) and the gear (61) are meshed; the insert block (63) is located outside the housing (4); the sliding direction of the insert block (63) is parallel to the rotation axis of the movable block (5); the housing (4) is provided with a slot 1 (8), a slot 2 (9) and a slot 3 (10); the slot 1 (8), the slot 2 (9) and the slot 3 (10) are all for the insert block (63) to be inserted into; When the insert block (63) is inserted into the first slot (8), the movable block (5) covers the second cooling channel (42); when the insert block (63) is inserted into the second slot (9), the movable block (5) covers the first cooling channel (41); when the insert block (63) is inserted into the third slot (10), the movable block (5) is located between the first cooling channel (41) and the second cooling channel (42).

3. The electric spindle with good heat dissipation effect according to claim 2, characterized in that: The housing (4) is provided with a limiting groove (47), the insert block (63) is located in the limiting groove (47), the slot (8), the slot (9) and the slot (10) are all connected to the limiting groove (47), and when the insert block (63) abuts against two opposite inner walls of the limiting groove (47), the insert block (63) is aligned with the slot (8) and the slot (9) respectively.

4. The electric spindle with good heat dissipation effect according to claim 3 is characterized in that: The minimum distances between the ends of the slot one (8), the slot two (9) and the slot three (10) away from the limit slot one (47) and the adjustment block (62) are all smaller than the length of the insert block (63) along the sliding direction.

5. The electric spindle with good heat dissipation effect according to claim 2, characterized in that: The insert block (63) comprises a sliding portion (631) slidably connected to the adjusting block (62) and a limiting portion (632) provided on the sliding portion (631); the limiting portion (632) is located on one side of the sliding portion (631) along the rotation direction of the adjusting block (62); and a limiting groove 2 (621) for accommodating the limiting portion (632) is provided on the adjusting block (62).

6. The electric spindle with good heat dissipation effect according to claim 1, characterized in that: The cooling channel 1 (41) and the cooling channel 2 (42) are both spirally arranged around the outer circumference of the motor stator (3), and the cooling channel 1 (41) and the cooling channel 2 (42) are arranged alternately.

Images