Motor rotary table with double heat dissipation structures
By setting an external radiator on the outside of the housing of the motor rotor and a built-in radiator between the motor rotor and the mandrel, the problem of low cooling efficiency of the existing motor rotor is solved, and efficient heat dissipation performance is achieved, ensuring the motor rotor stability and long lifespan.
Patent Information
- Application Number
- CN202420896725.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-27
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-27
AI Technical Summary
The cooling method of the existing motor turntable is inefficient, which makes it difficult to quickly eliminate the heat inside the motor, which can easily lead to motor failure, reduced accuracy and reduced production efficiency.
It adopts a dual heat dissipation structure, including setting up an external radiator on the outside of the housing and setting up a built-in radiator between the motor rotor and the mandrel. Through the synergy of these two radiators, the heat dissipation performance of the motor rotary table is improved.
Effectively remove heat generated inside the motor turntable, improve the working stability and reliability of the motor turntable, and extend the service life.
Smart Images
Figure CN222441475U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of numerical control equipment, in particular to a motor turntable with a double heat dissipation structure. Background Art
[0002] CNC machine tool processing usually uses a motor turntable to complete multi-station processing of parts. The motor turntable usually includes a motor and a turntable fixedly connected to the motor's rotor. During the operation of the motor turntable, the coils and bearings in the motor will generate a lot of heat. Since there is a shell on the outside of the motor, the heat inside the motor is difficult to eliminate quickly. When a large amount of heat accumulates inside the motor, it is easy to cause the coil inside the motor to burn out and short-circuit, which can lead to reduced accuracy of the motor turntable, increased failure rate and reduced production efficiency.
[0003] The existing cooling method of the motor turntable is to set a cooling device on the motor casing, and the cooling device takes away the heat conducted from the inside of the motor to the casing. Since the heat is transferred through the casing at a slow speed, the heat retained in the motor cannot be quickly eliminated, thereby affecting the service life and working reliability of the motor turntable. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art, and proposes a motor turntable with a dual heat dissipation structure. By arranging an external radiator in the shell and a built-in radiator between the motor rotor and the core shaft, efficient heat dissipation performance is provided to ensure stable and reliable operation of the motor turntable.
[0005] The utility model proposes a motor turntable with a double heat dissipation structure, comprising: a shell with an accommodating cavity, the shell comprising a bottom plate 11, a surrounding plate 12 fixed on the bottom plate 11 and a cover plate 13 fixed on the top of the surrounding plate 12, an external radiator is arranged on the outer side of the surrounding plate 12; a motor stator 2, a motor rotor 3 and a core shaft 4 are coaxially arranged in the accommodating cavity, the motor stator 2 is fixed to the inner wall of the surrounding plate 12; a support 5 is provided on the shell protruding relative to the cover plate 13, the support 5 is fixedly connected with the motor rotor 3 and the core shaft 4; a built-in radiator 6 is provided between the motor rotor 3 and the core shaft 4, and the built-in radiator 6 is fixed on the bottom plate 11; a bearing is provided between the built-in radiator 6 and the core shaft 4, and the built-in radiator 6 provides support for the bearing, so that the core shaft 4 can rotate with the motor rotor 3 and the support 5 according to the bearing.
[0006] In some preferred embodiments, the bearing includes an upper bearing 71 sleeved on the upper end of the core shaft 4 and a lower bearing 72 sleeved on the lower end of the core shaft 4 .
[0007] In some preferred embodiments, the upper end of the built-in heat sink 6 and the upper end of the core shaft 4 respectively have a first step portion 62 and a second step portion 41 that are relatively arranged, the outer ring of the upper bearing 71 abuts against the first step portion 62, and the inner ring of the upper bearing 71 abuts against the second step portion 41.
[0008] In some preferred embodiments, a pressure plate 81 is provided above the upper bearing 71 , the pressure plate 81 is locked with the built-in heat sink 6 , and the pressure plate 81 is pressed on the upper end surface of the outer ring of the upper bearing 71 to limit the upper bearing 71 .
[0009] In some preferred embodiments, a limiting arm 51 extends from the support platform 5 , and the limiting arm 51 abuts against an upper end surface of an inner ring of the upper bearing 71 to limit the upper bearing 71 .
[0010] In some preferred embodiments, the lower end of the built-in radiator 6 and the lower end of the core shaft 4 respectively have a third step portion 63 and a fourth step portion 42 that are relatively arranged, the fourth step portion 42 abuts against the lower end surface of the inner ring of the lower bearing 72, and the upper end surface of the outer ring of the lower bearing 72 abuts against the third step portion 63 in a limiting manner. A support plate 82 is provided below the lower bearing 72, the lower end surface of the outer ring of the lower bearing 72 abuts against the support plate 82, and the support plate 82 is locked to the lower end of the built-in radiator 6.
[0011] In some preferred embodiments, the external radiator is a liquid-cooled radiator or an air-cooled radiator; the external radiator is fixed to the outer side of the enclosure 12, or the external radiator and the enclosure 12 are an integral structure.
[0012] In some preferred embodiments, the external radiator is a liquid-cooled radiator that is an integral structure with the enclosure 12, including a plurality of first liquid-cooling channels 121 arranged inside the enclosure 12; the built-in radiator 6 is a liquid-cooled radiator, and a plurality of second liquid-cooling channels 61 are arranged inside the built-in radiator 6.
[0013] In some preferred embodiments, a first joint 111 and a second joint 112 are provided on the shell, a first pipeline 114 connecting the first joint 111 and the first end of the second liquid cooling channel 61 of the built-in radiator 6 is provided on the base plate 11, a second pipeline 115 connects the second end of the second liquid cooling channel 61 of the built-in radiator 6 and the first end of the first liquid cooling channel 121 of the external radiator, and a third pipeline 116 connecting the second end of the first liquid cooling channel 121 of the external radiator and the second joint 112 is provided on the base plate 11.
[0014] In some preferred embodiments, a machining notch connected to the second pipeline 115 is further provided on the bottom plate 11 , and a plug 119 is provided on the machining notch.
[0015] Compared with the prior art, the utility model has the following beneficial effects:
[0016] The motor turntable proposed by the utility model: an external radiator is arranged on the enclosure 12 of the motor turntable, and the heat generated by the motor stator 2 is taken away by the external radiator; a built-in radiator 6 is arranged between the motor rotor 3 and the core shaft 4 inside the motor turntable, and the built-in radiator 6 is used to provide support for the bearing connected to the core shaft 4, and to take away the heat generated during the rotation of the bearing to increase the service life of the bearing. The external radiator and the built-in radiator 6 cooperate with each other to provide efficient heat dissipation performance for the motor turntable, ensuring that the heat generated by the motor turntable during operation is discharged in time and does not accumulate inside, which is conducive to keeping the motor turntable in a stable and reliable working state and having a long service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the internal structure of the motor turntable of the utility model.
[0018] Figure 2 yes Figure 1 A magnified schematic diagram of local A.
[0019] Figure 3 yes Figure 1 A magnified schematic diagram of local B.
[0020] Figure 4 It is the front view of the motor turntable of the utility model.
[0021] Figure 5 yes Figure 4 Schematic diagram of the AA cross-section structure.
[0022] Figure 6 It is a schematic diagram of the bottom structure of the motor turntable of the utility model.
[0023] Figure 7 yes Figure 6 Schematic diagram of the BB cross-section structure.
[0024] Figure 8 yes Figure 6 Schematic diagram of the CC cross-section structure.
[0025] The dashed arrows in the figure indicate the flow direction of the coolant. DETAILED DESCRIPTION
[0026] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific implementation methods, structures, features and effects of the present application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.
[0027] Combination Figure 1-Figure 4 As shown, the motor turntable proposed by the utility model comprises: a shell with an accommodating cavity, the shell comprising a bottom plate 11, a surrounding plate 12 fixed on the bottom plate 11 and a cover plate 13 fixed on the top of the surrounding plate 12, an external radiator is arranged on the outer side of the surrounding plate 12; a motor stator 2, a motor rotor 3 and a spindle 4 are coaxially arranged in the accommodating cavity, and the motor stator 2 is fixed to the inner wall of the surrounding plate 12; a support 5 provided on the shell protruding relative to the bottom plate 11, the support 5 is used to carry the workpiece when the motor turntable is used in a CNC machine tool, the support 5 is fixedly connected to the motor rotor 3 and the spindle 4, and there is a clearance between the lower end of the spindle 4 and the bottom plate 11 of the shell, so that the motor rotor 3 drives the support 5 to rotate; a built-in radiator 6 is arranged between the motor rotor 3 and the spindle 4, and the built-in radiator 6 is fixed on the bottom plate 11; a bearing is arranged between the built-in radiator 6 and the spindle 4, and the built-in radiator 6 provides support for the bearing, so that the spindle 4 can rotate with the motor rotor 3 and the support 5 according to the bearing.
[0028] The utility model proposes a motor turntable with a dual heat dissipation structure: an external radiator is arranged on a surrounding plate 12 of the motor turntable, and the heat generated by the motor stator 2 is taken away by the external radiator; a built-in radiator 6 is arranged between the motor rotor 3 and the core shaft 4 inside the motor turntable, and the built-in radiator 6 is used to provide support for the bearing connected to the core shaft 4 and take away the heat generated during the rotation of the bearing to increase the service life of the bearing.
[0029] It can be seen that the utility model utilizes the external radiator and the built-in radiator 6 to cooperate with each other to provide efficient heat dissipation performance for the motor turntable, ensuring that the heat generated by the motor turntable during operation is discharged in time and will not accumulate inside, which is conducive to keeping the motor turntable in a stable and reliable working state and having a long service life.
[0030] The motor stator 2 is glued to the inner wall of the enclosure 12 by glue, or the motor stator 2 and the housing are fixed to the inner wall of the enclosure 12 by interference fit. The lower end of the built-in radiator 6 is fixed to the bottom plate 11 by screws or other means. A group of wiring heads 113 are provided on the bottom plate 11, and the group of wiring heads 113 are electrically connected to the motor stator 2 and the encoder reading head arranged inside the housing, respectively, wherein the encoder reading head is used to read the rotation angle value of the encoder fixed on the motor rotor 3 to determine the rotation angle of the motor turntable.
[0031] For example, the base 5 is fixedly connected to the upper end of the motor rotor 3 by a first screw 91, and the base 5 is fixedly connected to the upper end of the core shaft 4 by a second screw 92. The core shaft 4 provides reliable concentricity for the base 5 to rotate with the motor rotor 3, and provides smooth and reliable rotation when carrying workpieces when the motor turntable is used in a CNC machine tool.
[0032] The cover plate 13 is fixedly connected to the upper end of the enclosure 12 by a third screw 93. The cover plate 13 mainly serves to encapsulate the motor stator 2 in the housing. The support platform 5 is appropriately protruded from the cover plate 13 so that the cover plate 13 will not interfere with the rotation of the support platform 5.
[0033] During operation, the motor turntable is fixed by the bottom plate 11, the motor stator 2 and the built-in heat sink 6 do not rotate, and the motor stator 3 drives the support 5 and the core shaft to rotate according to the bearing.
[0034] The bearing is one or more, preferably multiple bearings can improve the concentricity of the rotation of the core shaft 4 and the rotation of the motor rotor 3. For example, the bearing shown in the figure includes an upper bearing 71 sleeved on the upper end of the core shaft 4 and a lower bearing 72 sleeved on the lower end of the core shaft 4.
[0035] like Figure 2 As shown, the upper end of the built-in heat sink 6 and the upper end of the core shaft 4 have a first step portion 62 and a second step portion 41 arranged opposite to each other, the outer ring of the upper bearing 71 abuts against the first step portion 62 so that the first step portion 62 provides support for the outer ring of the upper bearing 71, and the inner ring of the upper bearing 71 abuts against the second step portion 41 so that the second step portion 41 provides support for the inner ring of the upper bearing 71. In addition, a pressure plate 81 is provided above the upper bearing 71, and the pressure plate 81 is locked with the built-in heat sink 6 by the fourth screw 94, and the pressure plate 81 is pressed on the upper end surface of the outer ring of the upper bearing 71 to limit the upper bearing 71. Even, the support 5 extends a limiting arm 51, and the limiting arm 51 abuts against the upper end surface of the inner ring of the upper bearing 71 to limit the upper bearing 71.
[0036] like Figure 3 As shown, the lower end of the built-in radiator 6 and the lower end of the core shaft 4 respectively have a third step portion 63 and a fourth step portion 42 that are relatively arranged. The inner ring of the lower bearing 72 is sleeved on the lower end of the core shaft 4. The fourth step portion 42 abuts against the lower end surface of the inner ring of the lower bearing 72 to provide support. The upper end surface of the outer ring of the lower bearing 72 abuts against the third step portion 63 to limit the abutment. A support plate 82 is provided below the lower bearing 72. The lower end surface of the outer ring of the lower bearing 72 abuts against the support plate 82, and the support plate 82 is locked to the lower end of the built-in radiator 6 by screw fixing or the like.
[0037] It can be seen that the built-in radiator 6 not only provides physical support for the assembly of the upper bearing 71, the lower bearing 72 and the core shaft 4, but also the upper bearing 71 and the lower bearing 72 are in contact with the built-in radiator 6. Therefore, during the rotation of the motor, the heat generated by the upper bearing 71 and the lower bearing 72 can be transferred to the built-in radiator 6, and the heat is quickly discharged by the built-in radiator 6 to avoid overheating of the upper bearing 71 and the lower bearing 72 and affect the service life.
[0038] The external radiator is generally a liquid cooling radiator or an air cooling radiator, which is fixed to the outer side of the enclosure 12, and even the external radiator and the enclosure 12 are an integral structure. For example, the external radiator shown in the figure is a liquid cooling radiator that is an integral structure with the enclosure 12, including a plurality of first liquid cooling channels 121 arranged inside the enclosure 12, and uses a heat dissipation liquid (for example, a refrigerant such as water or oil) to flow through the first liquid cooling channels 121 to take away the heat generated by the motor stator 2.
[0039] The built-in radiator 6 is usually a liquid-cooled radiator, and a plurality of second liquid-cooling channels 61 are arranged inside the built-in radiator 6. The heat generated inside the motor turntable during operation is taken away by the heat dissipation liquid flowing through the second liquid-cooling channels 61, ensuring that the upper bearing 71 and the lower bearing 72 will not be damaged due to excessive temperature.
[0040] Further integration Figures 5 to 8 As shown, in some preferred embodiments, both the external radiator and the internal radiator 6 are liquid cooling radiators. A first connector 111 and a second connector 112 are provided on the housing (see Figure 6 As shown in FIG. 1 , a first pipeline 114 (see FIG. 1 ) is provided on the bottom plate 11 to connect the first joint 111 and the first end of the second liquid cooling channel 61 of the built-in radiator 6. Figure 7 As shown, a second pipe 115 is connected between the second end of the second liquid cooling channel 61 of the built-in radiator 6 and the first end of the first liquid cooling channel 121 of the external radiator (see Figure 5 As shown in FIG. 1 , a third pipeline 116 is provided on the bottom plate 11 and is connected between the second end of the first liquid cooling channel 121 of the external radiator and the second joint 112 .
[0041] The heat dissipation liquid enters the first end of the second liquid cooling channel 61 of the built-in radiator 6 from the first joint 111 through the first pipeline 114, and the heat dissipation liquid flows from the first end of the second liquid cooling channel 61 toward the second end of the second liquid cooling channel 61 to take away the heat generated inside the motor when it rotates; then, the heat dissipation liquid flows from the second end of the second liquid cooling channel 61 through the second pipeline 115 into the first end of the first liquid cooling channel 121 of the external radiator, and the heat dissipation liquid flows from the first end of the first liquid cooling channel 121 toward the second end of the first liquid cooling channel 121 to dissipate heat for the motor stator 2, and then, the heat dissipation liquid flows out from the second joint 112 through the third pipeline 116.
[0042] Recombination Figure 4 and Figure 5As shown. A processing notch connected to the second pipeline 115 is also provided on the bottom plate 11, and a plug 119 is provided on the processing notch to seal the processing notch, and the second pipeline 115 is processed on the bottom plate 11 through the processing notch. Among them, the third pipeline 116 can be processed from the outside to the inside at the connection between the bottom plate 11 and the second joint 112, and the first pipeline 114 can be processed from the outside to the inside at the connection between the bottom plate 11 and the first joint 111.
[0043] Of course, during use, the plug 119 can be removed as needed to allow the dirt remaining in the heat dissipation channel to be discharged from the processed groove, thereby preventing the dirt remaining in the heat dissipation channel from affecting the external radiator and the heat dissipation efficiency of the external radiator.
[0044] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A motor turntable with a dual heat dissipation structure, comprising: A housing having an accommodating cavity, the housing comprising a bottom plate (11), a surrounding plate (12) fixed on the bottom plate (11), and a cover plate (13) fixed on the top end of the surrounding plate (12), an external heat sink being provided on the outer side surface of the surrounding plate (12); a motor stator (2), a motor rotor (3), and a core shaft (4) being coaxially arranged in the accommodating cavity, the motor stator (2) being fixed to the inner wall of the surrounding plate (12); a support platform (5) being provided on the housing protruding from the cover plate (13), the support platform (5) being fixedly connected to the motor rotor (3) and the core shaft (4); the characteristics are: A built-in heat sink (6) is provided between the motor rotor (3) and the core shaft (4), and the built-in heat sink (6) is fixed on the bottom plate (11); A bearing is provided between the built-in heat sink (6) and the core shaft (4), and the built-in heat sink (6) provides support for the bearing, so that the core shaft (4) can rotate along with the motor rotor (3) and the support platform (5) based on the bearing.
2. The motor turntable according to claim 1, characterized in that: The bearing comprises an upper bearing (71) sleeved on the upper end of the core shaft (4) and a lower bearing (72) sleeved on the lower end of the core shaft (4).
3. The motor turntable according to claim 2, characterized in that: The upper end of the built-in heat sink (6) and the upper end of the core shaft (4) respectively have a first step portion (62) and a second step portion (41) arranged opposite to each other, the outer ring of the upper bearing (71) abuts against the first step portion (62), and the inner ring of the upper bearing (71) abuts against the second step portion (41).
4. The motor turntable according to claim 3, characterized in that: A pressure plate (81) is provided above the upper bearing (71), the pressure plate (81) is locked with the built-in heat sink (6), and the pressure plate (81) is pressed on the upper end surface of the outer ring of the upper bearing (71) to limit the position of the upper bearing (71).
5. The motor turntable according to claim 3, characterized in that: A limiting arm (51) extends from the support platform (5), and the limiting arm (51) abuts against an upper end surface of an inner ring of the upper bearing (71) to limit the position of the upper bearing (71).
6. The motor turntable according to claim 2, characterized in that: The lower end of the built-in heat sink (6) and the lower end of the core shaft (4) respectively have a third step portion (63) and a fourth step portion (42) arranged opposite to each other, the fourth step portion (42) abuts against the lower end surface of the inner ring of the lower bearing (72), the upper end surface of the outer ring of the lower bearing (72) abuts against the third step portion (63), a support plate (82) is provided below the lower bearing (72), the lower end surface of the outer ring of the lower bearing (72) abuts against the support plate (82), and the support plate (82) is locked to the lower end of the built-in heat sink (6).
7. The motor turntable according to any one of claims 1 to 6, characterized in that: The external radiator is a liquid cooling radiator or an air cooling radiator; the external radiator is fixed to the outer side of the enclosure (12), or the external radiator and the enclosure (12) are an integrated structure.
8. The motor turntable according to any one of claims 1 to 6, characterized in that: The external radiator is a liquid cooling radiator having an integral structure with the enclosure (12), and comprises a plurality of first liquid cooling channels (121) arranged inside the enclosure (12); the internal radiator (6) is a liquid cooling radiator, and a plurality of second liquid cooling channels (61) are arranged inside the internal radiator (6).
9. The motor turntable according to claim 8, characterized in that: A first joint (111) and a second joint (112) are provided on the shell, a first pipeline (114) connected between the first joint (111) and the first end of the second liquid cooling channel (61) is provided on the bottom plate (11), a second pipeline (115) is connected between the second end of the second liquid cooling channel (61) and the first end of the first liquid cooling channel (121), and a third pipeline (116) connected between the second end of the first liquid cooling channel (121) and the second joint (112) is provided on the bottom plate (11).
10. The motor turntable according to claim 9, characterized in that: A processed notch connected to the second pipeline (115) is also provided on the bottom plate (11), and a plug (119) is provided on the processed notch.