Motor housing

Abstract

A motor housing according to one embodiment of the present invention includes a flow path embedded in a cylindrical side wall, and has a motor housing space formed therein for housing a motor. The flow path includes: a lower right curved portion that provides 1 / 2 turn from a flow path inlet; a vertical right side extension part vertically extending from one end of the lower left side curve part; an upper right-side curved portion spaced apart from the lower right-side curved portion in parallel in the vertical direction from the vertical right-side extension portion and providing 1 / 2 turns; a chamber connected to the upper right curved section and used for removing sediment; and a left flow path which is connected to the chamber, has the same height as the chamber, and has a 1 / 2 circle. One end of the left flow path is connected to the chamber, and the upper end of the other end of the left flow path is connected to a flow path outlet.

Description

Technical Field

[0001] The invention relates to a motor housing, in particular to a motor housing prepared by die casting. Background Art

[0002] Generally, various types of machinery including automobiles are equipped with motors, which are electric motors used to convert electrical energy into rotational force. The motor is equipped with a stator for receiving current and a rotor that rotates its axis through the magnetic force of the stator and provides rotational force. The stator is equipped with a coil wound several times.

[0003] During the high-speed rotation of the motor, high-temperature heat is generated around the rotor and coil. The generated heat is transferred to the casing and discharged to the outside. The casing heat dissipation methods include air cooling and water cooling.

[0004] In this case, a common water-cooled motor housing has a spiral cooling pipe formed in the middle of the main body of the motor housing, a coolant inlet formed on one side of the cooling pipe, and a coolant outlet formed on the other side. Therefore, the coolant supplied from the coolant inlet circulates in the main body of the motor housing along the cooling pipe in a spiral shape and reduces the temperature of the motor housing, ultimately reducing the heat generated around the coil and the rotor.

[0005] Vacuum pump motors are available in air-cooled and water-cooled types. When air-cooled, a commercial induction motor is usually connected to the pump shaft using a coupling or the like. In this case, due to problems such as leakage at the motor connection, cooling efficiency, and motor efficiency (power consumption), it is usually used in low-cost vacuum pumps.

[0006] To solve the above problems, the motor rotor can be directly installed on the vacuum pump shaft to improve the motor efficiency and eliminate the leakage problem. In this case, water cooling is usually applied because there is no need to consider the heat problem caused by high cooling efficiency. It is only necessary to connect the pump coolant to the motor housing. Therefore, there is no need to set up an additional device for supplying coolant. In addition, there is no need to expose the pump for air cooling, and it can be placed in the case.

[0007] In the early days, the water jacket of the water-cooled motor of the vacuum pump was formed by welding a plate to the outside of the electrode shell made of stainless steel. However, in addition to the frequent leakage at the welding part and the heavy weight, it also had the disadvantage of high cost.

[0008] Subsequently, the commonly used ordinary vacuum water-cooled motor housing has a spiral cooling pipe formed in the middle of the main body of the motor housing. A coolant inlet is formed on one side of the cooling pipe, and a coolant outlet is formed on the other side. Therefore, the coolant supplied from the coolant inlet circulates in the main body of the motor housing along the cooling pipe in a spiral shape and reduces the temperature of the motor housing, ultimately reducing the heat generated around the coil and the rotor.

[0009] However, the general motor housing is cylindrical, with a spiral tube made of copper or stainless steel buried inside. Due to the nature of the casting work, the internal tube process is not only difficult, but also the tube position moves and causes defects due to the tube buoyancy and flow caused by the molten metal, which can cause the tube to twist.

[0010] Also, casting work and processing defects cause scratches and deformations at the tube inlet, which may cause water leakage. Also, in the case of long-term use of coolant, as sediment blocks the flow path, the cooling efficiency will decrease. In addition, the narrow cross-sectional area of ​​the tube will lead to low cooling efficiency.

[0011] Therefore, there is a current demand for a motor housing to have a structure capable of improving cooling efficiency and easily removing a gasket. Summary of the invention

[0012] In order to solve the technical problem, an object of the present invention is to provide a motor housing, which can easily remove the gasket and improve the cooling efficiency.

[0013] In order to solve the technical problem, an object of the present invention is to provide a motor housing including a flow path, wherein the flow path is provided with a chamber capable of easily removing sediment.

[0014] In order to solve the technical problem, the object of the present invention is to provide a coolant flow path shape and a motor housing, that is, in the process of preparing a casting, the casting sand can be easily discharged and the casting production efficiency can be improved.

[0015] In order to solve the technical problem, the object of the present invention is to provide a motor housing that uses a casting made of aluminum material and improves cooling efficiency by directly cooling through a curved water jacket buried in the motor housing, rather than indirectly cooling through a stainless steel pipe.

[0016] The motor housing of one embodiment of the present invention includes a flow path embedded in the cylindrical side wall, and a motor accommodation space for accommodating the motor is formed inside, and the flow path includes: a lower right curve portion, which provides 1 / 2 turn from the flow path inlet; a vertical right extension portion, which extends vertically from one end of the lower left curve portion; an upper right curve portion, which is spaced from the vertical right extension portion and parallel to the lower right curve portion in the vertical direction and provides 1 / 2 turn; a chamber, which is connected to the upper right curve portion and is used to remove sediment and casting sand; and a left flow path, which is connected to the chamber, has the same height as the chamber and has 1 / 2 turn. One end of the left flow path is connected to the chamber, and the upper end of the other end of the left flow path is connected to the flow path outlet.

[0017] According to an embodiment of the present invention, the motor housing is in a cylindrical shape including a cutting portion whose side is cut into a plane, the chamber is arranged at the cutting portion, and the motor housing may further include a chamber cover for sealing the chamber.

[0018] According to an embodiment of the present invention, the lower right curved portion, the upper right curved portion and the left flow path may be in the shape of a curved strip having a predetermined inner radius and a predetermined outer radius.

[0019] According to one embodiment of the present invention, one end of the left flow path is connected to the chamber, and the other end of the left flow path is connected to the flow path outlet. The left flow path may further include a recessed portion adjacent to the flow path outlet and recessed on the upper side.

[0020] According to an embodiment of the present invention, the flow path inlet and the flow path outlet may face each other based on the central axis of the motor housing.

[0021] According to an embodiment of the present invention, the flow path inlet may be disposed adjacent to the cutting portion.

[0022] According to one embodiment of the present invention, the above-mentioned motor housing may include: a flange, which is quadrilateral and combined with the motor; a neck, which is cylindrical and continuously connected to the above-mentioned flange and has a reduced diameter; a flow path buried portion, which is continuously connected to the above-mentioned neck and has an increased diameter; and a supporting portion, which is continuously connected to the above-mentioned flow path buried portion and has a reduced diameter.

[0023] According to one embodiment of the present invention, the flow path is arranged inside the flow path embedded portion, one side of the flange is on the same plane as a portion of the neck, a portion of the flow path embedded portion, and a portion of the support portion, the motor housing provides a cutting portion whose side is cut into a plane, and the chamber can be arranged at the cutting portion of the flow path embedded portion.

[0024] According to an embodiment of the present invention, the embedded flow path portion further includes a protruding portion partially protruding outward, and the protruding portion may extend along a vertical direction of the embedded flow path portion.

[0025] According to an embodiment of the present invention, the channel embedding portion further includes a recessed portion partially recessed from the upper surface toward the lower side, and the recessed portion can be aligned with the through hole adjacently disposed at the vertex of the flange in the vertical direction.

[0026] The motor housing according to an embodiment of the present invention can not only improve the casting efficiency and cooling efficiency, but also, when precipitates are generated, remove the precipitates deposited in the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1The figure is a three-dimensional view showing a motor housing according to an embodiment of the present invention.

[0028] Figure 2 for Figure 1 Top view of the motor housing.

[0029] Figure 3 To show Figure 1 A three-dimensional view of the flow path of the motor housing.

[0030] Figure 4 For along Figure 2 Cross-sectional view of the A-A' line cutting.

[0031] Figure 5 For along Figure 2 Cross-sectional view of the BB' line cutting.

[0032] Figure 6 For along Figure 2 Cross-sectional view of the C-C' line cutting.

[0033] Description of Reference Numerals

[0034] 100: Motor housing

[0035] 101: Motor housing space

[0036] 110: Flow path

[0037] 112: Lower right curve

[0038] 113: Vertical right extension

[0039] 114: Upper right curve

[0040] 115: Chamber

[0041] 116: Left flow path DETAILED DESCRIPTION

[0042] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein, and may also be implemented by other embodiments. Instead, the embodiments described herein are only for illustration, so that a person skilled in the art of the present invention can thoroughly and completely understand the disclosure and fully understand the concept of the present invention. To ensure clarity, the structural elements in the accompanying drawings may be enlarged and shown. In the entire content of this specification, the same figure numerals represent the same structural elements.

[0043] Figure 1 The figure is a three-dimensional view showing a motor housing according to an embodiment of the present invention.

[0044] Figure 2 for Figure 1 Top view of the motor housing.

[0045] Figure 3 To show Figure 1 A three-dimensional view of the flow path of the motor housing.

[0046] Figure 4 For along Figure 2 Cross-sectional view of the A-A' line cutting.

[0047] Figure 5 For along Figure 2 Cross-sectional view of the BB' line cutting.

[0048] Figure 6 For along Figure 2 Cross-sectional view of the C-C' line cutting.

[0049] Reference Figures 1 to 6 The motor housing 100 of one embodiment of the present invention includes a flow path 110 embedded in a cylindrical side wall, and a motor accommodating space 101 for accommodating a motor (not shown) is formed inside.

[0050] The flow path 110 includes: a lower right curve portion 112, which provides 1 / 2 turn from the flow path inlet 111; a vertical right extension portion 113, which extends vertically from one end of the lower left curve portion 112; an upper right curve portion 114, which is spaced from the vertical right extension portion 113 and parallel to the lower right curve portion in the vertical direction and provides 1 / 2 turn; a chamber 115, which is connected to the upper right curve portion 114 and is used to remove sediment and casting sand; and a left flow path 116, which is connected to the chamber 115, has the same height as the chamber 115 and has 1 / 2 turn. One end of the left flow path 116 is connected to the chamber 115, and the upper end of the other end of the left flow path 116 is connected to the flow path outlet 119.

[0051] The cross-section of the lower right curved portion 112 and the upper right curved portion 114 may be a quadrilateral. The cross-section of the lower right curved portion 112 and the upper right curved portion 114 may be larger than the cross-section of an ordinary pipe, thereby increasing the cooling effect.

[0052] The chamber 115 may include an inner side surface having a curvature and an outer side surface having a plane. The cross-section of the left flow path 116 may be a quadrilateral. After the chamber 115 is sealed by the chamber cover 132, it may be opened to remove sediment. The coolant that quickly flows through the lower right curved portion 112 and the upper right curved portion 114 has a reduced flow rate in the chamber 115. As a result, the sediment may be mainly deposited in the chamber. In order to increase the volume of the chamber 115, the outer side surface of the chamber having a plane may be more protruding than the outer curved surface of the lower right curved portion 112.

[0053] The flow path 110 may be connected to the chamber 115 by running 180 degrees in the counterclockwise direction through the lower right curved portion 112 and running 180 degrees in the clockwise direction through the upper right curved portion 114. The flow path 110 may extend 180 degrees in the clockwise direction from the chamber 115 through the left flow path 116. The left flow path 116 may provide a wide cross section to increase cooling efficiency.

[0054] When preparing a casting, the casting sand filled in the lower right curved portion 112 and the vertical right extending portion 113 can be discharged through the flow path inlet 111. The casting sand filled in the vertical right extending portion 113, the upper right curved portion 114, the left flow path 116, the left lower flow path 117 and the chamber 115 can be discharged through the chamber. The casting sand filled in the left vertical extending portion 118 can be discharged through the flow path outlet 119.

[0055] The lower right curved portion 112 , the upper right curved portion 114 , and the left flow path 116 may be in the shape of a curved line having a predetermined inner radius and a predetermined outer radius.

[0056] The motor housing 100 may be in a cylindrical shape including a cut portion 103 whose side is cut into a plane. The chamber may be buried in the cut portion 103. A chamber cover 132 may be combined with the cut portion 103 to seal the chamber 115. The chamber cover 132 may be in a quadrilateral plate shape. The motor housing 100 may be made of aluminum material. The motor housing may be prepared by a die casting method. In the case of preparation by a die casting method, the chamber 115 may be a component for removing casting sand.

[0057] One end of the left flow path 116 is connected to the chamber 115 , and the other upper end of the left flow path 116 may be connected to the flow path outlet 119 .

[0058] The left flow path 116 may further include a recessed portion 117a adjacent to the flow path outlet 119 and having a recessed upper portion. Thus, the coolant flowing through the left flow path 116 may circulate inside the left flow path 116 through the recessed portion 117a. Based on the recessed portion 117a, the left flow path 116 may include a left lower flow path 117 and a left vertical extension portion 118. The flow path outlet 119 may be connected to the upper end portion of the right vertical extension portion 118.

[0059] The flow path inlet 111 and the flow path outlet 119 may face each other based on the central axis of the motor housing. The flow path inlet 111 may be disposed adjacent to the cutting portion. The cross-sectional height of the lower right curved portion 112 may be greater than the cross-sectional height of the upper right curved portion 114. Thus, the upper right curved portion 114 may provide a fast flow rate.

[0060] The motor housing 110 may include: a flange 127 in a quadrilateral shape, which is combined with a motor (not shown); a neck 128 in a cylindrical shape, which is continuously connected to the flange 127 and has a reduced diameter; a flow path buried portion 122, which is continuously connected to the neck 128 and has an increased diameter; and a support portion 129, which is continuously connected to the flow path buried portion 122 and has a reduced diameter.

[0061] The flow path 110 may be disposed inside the flow path embedding portion 122. One side surface of the flange 127 and a portion of the neck 128, a portion of the flow path embedding portion 122, and a portion of the support portion 129 may be on the same plane. The same plane may provide the cutting portion 103. The motor housing 100 may provide a cutting portion 103 whose side surface is cut into a plane. The chamber 105 may be embedded in the cutting portion 103 of the flow path embedding portion 122. The inner side surface of the chamber 115 is a curved surface, and the outer side surface of the chamber 115 may be a plane.

[0062] The channel embedding portion 122 may further include a pair of protrusions 125 partially protruding outward. The protrusions 125 may extend in a vertical direction of the channel embedding portion 122. When preparing a casting, the protrusions 125 may be used to fix an outer mold.

[0063] The flow path embedding portion 122 may further include a recessed portion 121 partially recessed from the upper surface to the lower side. The recessed portion 121 may be vertically aligned with the through hole 127a adjacently disposed at the vertex of the flange 127. The recessed portion 121 may be recessed in an inclined manner. The recessed portion 121 may provide a space for the head of a bolt inserted into the flange 127 to enter.

[0064] The motor housing 100 may further include an alignment portion 126 in a ring shape protruding from the flange 127. The alignment portion 126 may be aligned with the motor.

[0065] The motor housing space 101 may be cylindrical. The motor housing space 101 may include an insulator molding flow path 126a, and the insulator molding flow path 126a vertically extends from the inner side surface of the cylinder. The insulator molding flow path 126a may be filled with epoxy resin.

[0066] A protruding protrusion 143 may be provided on the lower surface of the motor housing space 101. The protrusion 143 may be combined with and aligned with the motor. A through hole 144 may be provided on the lower surface of the motor housing space 101 for passing a wire. An air hole 145 may be provided on the lower surface of the motor housing space 101 to allow air to escape during the epoxy resin molding process.

[0067] Although specific preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various embodiments that can be implemented by ordinary technicians in the technical field to which the present invention belongs without departing from the technical idea of ​​the present invention all fall within the scope of protection required by the present invention.

Claims

1. A motor housing, comprising a flow path embedded in a cylindrical side wall and having a motor receiving space formed inside for receiving a motor, wherein the motor housing is characterized in that: The above flow paths include: The lower right curved part provides 1 / 2 turn from the flow path entrance; A vertical right extension portion extending vertically from one end of the lower left curved portion; An upper right curved portion, starting from the vertical right extending portion, is spaced apart from the lower right curved portion in a vertical direction and parallel to the lower right curved portion and provides a 1 / 2 turn; a chamber connected to the upper right curved portion for removing sediment and casting sand; and The left flow path is connected to the above chamber, has the same height as the above chamber and has a 1 / 2 turn. One end of the left flow path is connected to the chamber, and an upper end of the other end of the left flow path is connected to a flow path outlet.

2. The motor housing according to claim 1, characterized in that: The motor housing is in the shape of a cylinder including a cut portion where one side is cut into a plane. The chamber is arranged at the cutting position. The motor housing further comprises a chamber cover for sealing the chamber.

3. The motor housing according to claim 1, characterized in that: The lower right curved portion, the upper right curved portion, and the left flow path are in the shape of a curved line having a predetermined inner radius and a predetermined outer radius.

4. The motor housing according to claim 3, characterized in that: One end of the left flow path is connected to the chamber, and the other end of the left flow path is connected to the flow path outlet. The left flow path further includes a recessed portion adjacent to the flow path outlet and having a recessed upper portion.

5. The motor housing according to claim 1, characterized in that: The flow path inlet and the flow path outlet face each other with respect to the central axis of the motor housing.

6. The motor housing according to claim 2, characterized in that: The flow path inlet is arranged adjacent to the cutting portion.

7. The motor housing according to claim 1, characterized in that: The motor housing comprises: The flange is quadrilateral and is combined with the motor; a neck, which is cylindrical and continuously connected to the flange and has a reduced diameter; a flow channel embedded portion, which is continuously connected to the neck portion and has an increased diameter; and The supporting portion is continuously connected to the flow path embedded portion and has a reduced diameter.

8. The motor housing according to claim 7, characterized in that: The flow path is arranged inside the flow path buried portion. One side surface of the flange is on the same plane as a portion of the neck, a portion of the flow path embedded portion, and a portion of the support portion. The motor housing has a cutting portion whose side is cut into a plane. The chamber is provided at the cut portion of the flow path embedded portion.

9. The motor housing according to claim 7, characterized in that: The above-mentioned channel embedding portion further includes a protruding portion partially protruding outward, The protrusion extends in a vertical direction of the flow path embedded portion.

10. The motor housing according to claim 7, characterized in that: The above-mentioned channel embedding part also includes a recessed part which is partially recessed from the upper part to the lower side. The recessed portion is aligned with a through hole adjacent to a vertex of the flange in a vertical direction.

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