Motor heat dissipation device

Abstract

The invention discloses a motor heat dissipation device, and belongs to the technical field of motor heat dissipation. A fan shaft is rotationally mounted on the sealing plate; a plurality of fan blades are uniformly mounted at the end part of the fan shaft; the fan shaft is rotationally connected with the rotating shaft; an axial chute A is formed in the tail end of the fan shaft; axial chutes B are formed in the tail ends of the rotating shafts; a connecting column is mounted in an axial sliding cavity formed by the axial sliding groove A and the axial sliding groove B in a sliding manner; the sealing plate is provided with strip-shaped ventilation holes; retractable corrugated sheets are mounted in the strip-shaped ventilation holes in a sliding manner; a driving assembly is installed on the sealing plate. When the temperature in the motor stretches out and draws back to a critical value A, the memory spring A shrinks to open the strip-shaped ventilation holes to facilitate heat dissipation; meanwhile, the rotating shaft is connected with the fan shaft through the connecting column, and hot air in the motor is pumped out; on the contrary, when the temperature in the motor is lower than a telescopic critical value A, the retractable corrugated sheets are unfolded to seal the strip-shaped ventilation holes, and meanwhile the function that the fan blades stop rotating is achieved; high-temperature heat dissipation is achieved, and the protection state at the low temperature is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of motor heat dissipation, and in particular to a motor heat dissipation device. Background Art

[0002] Existing motor heat dissipation mostly uses a cooling fan to dissipate heat inside the motor; in order to reduce costs, the fan shaft of the cooling fan is often connected to the motor shaft to provide power. Although the above motor heat dissipation method can achieve the heat dissipation effect, it still has the following disadvantages: when the motor shaft rotates, the cooling fan will rotate synchronously to dissipate heat, but in a cold environment, the motor needs to heat up quickly to adapt to the working environment; it is obvious that the above method cannot meet the needs; at the same time, when the motor does not need to dissipate heat, the motor does not need to dissipate heat through the heat dissipation holes connected to the outside world. If the heat dissipation holes remain unobstructed at this time, it will affect the dustproof and stability protection of the motor. In summary, it is impossible to dissipate heat or maintain a thermal insulation protection state of the motor according to the actual temperature inside the motor. In order to solve the above problems, the present invention provides a motor heat dissipation device. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a motor heat dissipation device, which achieves high-temperature heat dissipation and ensures protection at low temperatures by installing shrinkable corrugated sheets, connecting columns and drive components on the sealing plate, thereby solving the technical problems raised in the background technology.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: the present invention provides a motor heat dissipation device, comprising a stator installed inside a motor housing, and a rotor installed outside a rotating shaft, a sealing plate is installed at one end of the motor housing close to the rear end cover; a fan shaft is rotatably installed at the center position of the sealing plate, and a plurality of fan blades are evenly installed at the end of the fan shaft; the fan shaft is rotatably connected to the rotating shaft; an axial slide groove A is coaxially provided at the end of the fan shaft; an axial slide groove B is coaxially provided at the end of the rotating shaft; a connecting column is slidably installed in an axial slide cavity formed by the axial slide groove A and the axial slide groove B; The sealing plate is provided with strip-shaped ventilation holes evenly distributed in a ring shape; a retractable corrugated sheet is slidably installed in the strip-shaped ventilation holes; a driving component is installed on the sealing plate; the driving component drives the retractable corrugated sheet to retract or extend, and at the same time drives the connecting column to connect or disconnect the rotating shaft and the fan shaft.

[0005] Preferably, the driving assembly includes a memory spring A and a T-shaped slider; the strip-shaped air vent is symmetrically slidably installed on both sides of the strip-shaped air vent; the two ends of the T-shaped slider are slidably installed in the strip-shaped air vent; the two sides of the retractable corrugated sheet are slidably installed in the strip-shaped air vent and the two ends of the retractable corrugated sheet are respectively connected to the T-shaped slider and one end of the strip-shaped air vent; the T-shaped slider has a magnet A embedded therein; the two ends of the memory spring A are respectively connected to the T-shaped slider and one end of the strip-shaped air vent; The axial slide groove A is slidably installed with a strip-shaped slide hole on the periphery; a plurality of limit sliders are evenly distributed in an annular manner on the rear end of the connecting column; the limit slider is slidably installed in the strip-shaped slide hole; a magnet B is embedded in the limit slider; the rear end of the connecting column is connected to the bottom of the axial slide groove A through a spring.

[0006] Preferably, a plurality of teeth are evenly distributed in a ring shape at the front end of the connecting column; and a plurality of tooth grooves matching the teeth are evenly distributed at the bottom of the axial sliding groove B.

[0007] Preferably, a cylindrical cavity is provided in the connecting column.

[0008] Preferably, the fan shaft end is externally rotatably mounted with flange A; the shaft end is externally fixedly mounted with flange B; and flange A is connected to flange B via screws.

[0009] Preferably, the rear end cover has a plurality of arc-shaped air holes evenly distributed in a ring shape.

[0010] Preferably, strip-shaped air inlet holes are evenly distributed in a circular shape on the outer side surface of the front portion of the motor housing; spring grooves connected to the strip-shaped air inlet holes are evenly distributed in a circular shape on the inner side surface of the motor housing; limiting grooves are symmetrically provided on both sides of the strip-shaped air inlet holes and the limiting grooves extend into the spring grooves; an arc-shaped corrugated expansion piece is slidably installed between the two limiting grooves; the two ends of the arc-shaped corrugated expansion piece are respectively connected to one end of the strip-shaped air inlet hole and one side of the arc-shaped slider; the two ends of the arc-shaped slider are slidably installed in the limiting grooves; one side of the arc-shaped slider is connected to a memory spring B and the other end of the memory spring B is fixedly installed on one side of the spring groove.

[0011] Preferably, rectangular air holes are evenly distributed in a ring on the side of the sealing plate; a number of lightweight baffles are evenly and rotatably installed in the rectangular air holes; the baffle shaft of the lightweight baffle is rotatably installed between the two side walls of the rectangular air holes; a torsion spring is fixedly installed at the end of the baffle shaft and the torsion arm of the torsion spring is fixedly installed on the inner side of the baffle shaft groove.

[0012] The beneficial effects of the present invention are: In the present invention, when the temperature inside the motor exceeds the critical expansion value A of the memory spring A, the memory spring A contracts to fold the shrinkable corrugated sheet and open the strip-shaped ventilation hole for heat dissipation; at the same time, the magnet A moves away from the magnet B, and the connecting column connects the rotating shaft with the fan shaft, thereby driving the fan blades to rotate and extracting the hot air in the motor to the outside; on the contrary, when the temperature inside the motor is lower than the critical expansion value A of the memory spring A, the memory spring A stretches to restore the natural state, so that the shrinkable corrugated sheet can be unfolded to seal the strip-shaped ventilation hole, and at the same time, the magnet A approaches the magnet B, and the attraction between the magnets pulls the connecting column back, so that the fan blades stop rotating; both high-temperature heat dissipation and low-temperature protection are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 A schematic structural diagram of a motor heat dissipation device provided by the present invention.

[0015] Figure 2 for Figure 1 Vertical cross-sectional view of .

[0016] Figure 3 for Figure 2 A is an enlarged view of the middle image.

[0017] Figure 4 for Figure 2 Enlarged view of B.

[0018] Figure 5 It is a schematic diagram of the structure in which a shrinkable corrugated sheet, a connecting column, a driving assembly and a lightweight baffle are installed on the sealing plate of the present invention.

[0019] Figure 6 for Figure 5 Vertical cross-sectional view of .

[0020] Figure 7 for Figure 6 Enlarged view of C in the middle.

[0021] Figure 8 It is a partial cross-sectional view of the motor housing in the present invention.

[0022] Fig. 9 It is a schematic diagram of the structure in which the retractable corrugated sheet, the memory spring A and the T-shaped slider are installed with each other in the present invention.

[0023] Fig.10It is a schematic diagram of the structure of the connecting column in the present invention.

[0024] Fig.11 It is a schematic structural diagram of the mutual installation of the arc-shaped corrugated expansion piece, the arc-shaped slider and the memory spring B in the present invention.

[0025] Description of the accompanying drawings: 1-motor housing, 11-stator, 12-rotating shaft, 121-axial slide groove B, 122-flange B, 13-rotor, 14-rear end cover, 141-arc-shaped air vent, 15-strip air inlet, 151-limiting groove, 16-spring groove, 2-sealing plate, 21-strip air vent, 211-strip limiting slide groove, 22-rectangular air vent, 3-fan shaft, 31-fan blade, 32-axial slide groove A, 321-bar slide hole, 33-flange A, 4-connecting column, 41-limit slider, 411-magnet B, 42-spring, 43-teeth, 44-cylindrical cavity, 5-retractable corrugated sheet, 61-memory spring A, 62-T-type slider, 621-magnet A, 71-arc corrugated expansion sheet, 72-arc slider, 73-memory spring B, 81-lightweight baffle. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Specific embodiment one: like Figures 1 to 11As shown, the present invention provides a motor heat dissipation device, including a stator 11 installed inside a motor housing 1, and a rotor 13 installed outside a rotating shaft 12, and a sealing plate 2 is installed at one end of the motor housing 1 near the rear end cover 14; specifically, the rear end cover 14 is evenly distributed with a plurality of arc-shaped air holes 141 in a ring for ventilation and heat dissipation. A fan shaft 3 is rotatably installed at the center position of the sealing plate 2, and a plurality of fan blades 31 are evenly installed at the end of the fan shaft 3. When the plurality of fan blades 31 rotate, the hot air inside the motor is drawn outward for efficient heat dissipation. The fan shaft 3 is rotatably connected to the rotating shaft 12; specifically, a flange A33 is rotatably installed on the outside of the end of the fan shaft 3; a flange B122 is fixedly installed on the outside of the end of the rotating shaft 12; the flange A33 is connected to the flange B122 by screws, and when the flange A33 is fixedly connected to the flange B122 and the connecting column 4 is not connected to the rotating shaft 12, the rotation of the rotating shaft 12 does not drive the fan shaft 3 to rotate. An axial groove A32 is coaxially provided at the end of the fan shaft 3; an axial groove B121 is coaxially provided at the end of the rotating shaft 12; a connecting column 4 is slidably installed in the axial sliding cavity formed by the axial groove A32 and the axial groove B121; specifically, a cylindrical cavity 44 is provided in the connecting column 4 to make the overall mass lighter for horizontal driving; in addition, a plurality of teeth 43 are evenly distributed in an annular manner at the front end of the connecting column 4; a plurality of tooth grooves matching the teeth 43 are evenly distributed at the bottom of the axial groove B121; when the connecting column 4 is driven to contact with the bottom of the axial groove B121, the teeth 43 are matched with the tooth grooves to realize the connection between the connecting column 4 and the rotating shaft 12; that is, the connection between the rotating shaft 12 and the fan shaft 3. See also Figure 3 as well as Figures 5 to 7As shown, the sealing plate 2 is provided with strip-shaped ventilation holes 21 evenly distributed in a ring; a retractable corrugated sheet 5 is slidably installed in the strip-shaped ventilation holes 21; a driving component is installed on the sealing plate 2; the driving component drives the retractable corrugated sheet 5 to retract or extend, and at the same time drives the connecting column 4 to connect or disconnect the rotating shaft 12 and the fan shaft 3; this process can open the strip-shaped ventilation holes 21 and realize the stable connection between the rotating shaft 12 and the fan shaft 3 at the same time; or realize the sealing of the strip-shaped ventilation holes 21 and realize the separation of the rotating shaft 12 and the fan shaft 3 at the same time. Specifically, the driving assembly includes a memory spring A61 and a T-shaped slider 62; the strip-shaped limiting slide grooves 211 are symmetrically slidably installed on both sides of the strip-shaped ventilation hole 21; the two ends of the T-shaped slider 62 are slidably installed in the strip-shaped limiting slide grooves 211; the two sides of the retractable corrugated sheet 5 are slidably installed in the strip-shaped limiting slide grooves 211, and the two ends of the retractable corrugated sheet 5 are respectively connected to the T-shaped slider 62 and one end of the strip-shaped ventilation hole 21; the T-shaped slider 62 has a built-in magnet A621; the two ends of the memory spring A61 are respectively connected to the T-shaped slider 62 and one end of the strip-shaped ventilation hole 21, and the memory spring A61 is located on the inner side of the retractable corrugated sheet 5, and also That is, the memory spring A61 can directly contact the gas temperature inside the motor; the memory spring A61 here is a high-temperature contraction memory spring, and the critical point of the expansion and contraction change is the expansion and contraction critical value A; different critical value temperature ranges can be set as needed; when the temperature is lower than the critical value A, the memory spring A61 maintains a natural state, and in the natural state, the memory spring A61 can fully unfold the shrinkable corrugated sheet 5 to achieve the sealing of the strip ventilation hole 21; when the internal temperature of the motor is higher than the expansion and contraction critical value A, the memory spring A61 contracts to fold the shrinkable corrugated sheet 5 and open the strip ventilation hole 21, which is convenient and efficient.

[0028] At the same time, a strip-shaped sliding hole 321 is slidably installed around the circumference of the axial sliding groove A32; a plurality of limiting sliders 41 are evenly distributed in an annular manner at the rear end of the connecting column 4; the limiting slider 41 is slidably installed in the strip-shaped sliding hole 321; it is ensured that the connecting column 4 can conveniently slide relative to the fan shaft 3 along the axial direction, and it is also ensured that the connecting column 4 and the fan shaft 3 rotate stably and synchronously, so that the fan shaft 3 and the rotating shaft 12 can be conveniently separated and connected. A magnet B411 is embedded in the limiting slider 41; the rear end of the connecting column 4 is connected to the bottom of the axial sliding groove A32 through a spring 42. When the internal temperature of the motor is lower than the critical value A of the expansion and contraction, the T-shaped slider 62 approaches the fan shaft 3 under the action of the memory spring A61; at this time, the magnet A621 in the T-shaped slider 62 and the magnet B411 in the limiting slider 41 attract each other, and the magnet attraction at this place is greater than the elastic force of the spring 42, so that one end of the connecting column 4 is stably located at a position corresponding to the T-shaped slider 62, and the connecting column 4 is kept separated from the rotating shaft 12. When the temperature inside the motor is higher than the expansion and contraction critical value A, the memory spring A61 contracts, the magnet A621 moves away from the magnet B411, and the attraction between the magnets is small; under the elastic force of the spring 42, the teeth 43 at the end of the connecting column 4 correspond to the tooth grooves, thereby realizing the connection between the connecting column 4 and the rotating shaft 12; that is, the connection between the rotating shaft 12 and the fan shaft 3.

[0029] During actual use of this embodiment, when the temperature inside the motor exceeds the critical expansion value A of the memory spring A61, the memory spring A61 contracts to fold up the retractable corrugated sheet 5 and open the strip vent 21 for heat dissipation; at the same time, the magnet A621 moves away from the magnet B411, and the connecting column 4 connects the rotating shaft 12 with the fan shaft 3, thereby driving the fan blades 31 to rotate and extracting the hot air inside the motor to the outside; on the contrary, when the temperature inside the motor is lower than the critical expansion value A of the memory spring A61, the memory spring A61 stretches to restore its natural state, thereby unfolding the retractable corrugated sheet 5 to seal the strip vent 21, and at the same time, the magnet A621 approaches the magnet B411, and the attraction between the magnets pulls back the connecting column 4, thereby stopping the rotation of the fan blades 31; both high-temperature heat dissipation and low-temperature protection are achieved. Specific embodiment 2: See also Figure 4 , Figure 8 as well as Fig.11 As shown, on the basis of retaining all the technical features in the specific embodiment 1, strip-shaped air inlet holes 15 are evenly distributed in an annular manner on the outer side surface of the front part of the motor housing 1; spring grooves 16 connected to the strip-shaped air inlet holes 15 are evenly distributed in an annular manner on the inner side surface of the motor housing 1, and the spring grooves 16 are used to ensure that the memory spring B73 can effectively contact the gas inside the motor; limiting grooves 151 are symmetrically provided on both sides of the strip-shaped air inlet hole 15 and the limiting grooves 151 extend into the spring grooves 16; an arc-shaped corrugated expansion piece 71 is slidably installed between the two limiting grooves 151; the two ends of the arc-shaped corrugated expansion piece 71 are respectively connected to one end of the strip-shaped air inlet hole 15 and one side of the arc-shaped slider 72; the two ends of the arc-shaped slider 72 are slidably installed in the limiting grooves 151; one side of the arc-shaped slider 72 is connected to the memory spring B73 and the other end of the memory spring B73 is fixedly installed on one side of the spring groove 16. The memory spring B73 is a high-temperature elongation memory spring, and its street-facing state is the expansion and contraction critical value B; when the temperature is lower than the expansion and contraction critical value B, the memory spring B73 is shorter, and the arc-shaped corrugated expansion piece 71 can be unfolded to achieve the sealing of the strip air inlet hole 15 to ensure the low-temperature protection state inside the motor; when the internal temperature of the motor is higher than the expansion and contraction critical value B, the memory spring B73 stretches, and the arc-shaped corrugated expansion piece 71 realizes the opening of the strip air inlet hole 15, which is convenient for air intake, and realizes the airflow from the strip air inlet hole 15 to the strip ventilation hole 21, which is convenient for efficient heat dissipation. Specific embodiment three: See also Figure 5As shown, on the basis of retaining all the technical features in specific embodiment one and embodiment two, rectangular air holes 22 are evenly distributed in a ring on the side of the sealing plate 2; a number of lightweight baffles 81 are evenly and rotatably installed in the rectangular air holes 22; the baffle shaft of the lightweight baffle 81 is rotatably installed between the two side walls of the rectangular air holes 22; a torsion spring is fixedly installed at the end of the baffle shaft and the torsion arm of the torsion spring is fixedly installed on the inner side of the baffle shaft groove; in the natural state, the two ends of the lightweight baffle 81 are attached to the inside of the rectangular air hole 22, and at the same time, the side of the lightweight baffle 81 is pressed against the side of another lightweight baffle 81, ensuring good protection when not opened; when the fan blades 31 rotate, the airflow and wind force will blow the baffle shaft of the lightweight baffle 81 to rotate, thereby more effectively dissipating heat; when the fan blades 31 do not rotate, under the action of the torsion spring, the lightweight baffle 81 returns to its natural state to ensure a good internal protection effect.

[0032] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A motor heat dissipation device, comprising a stator (11) mounted inside a motor housing (1), and a rotor (13) mounted outside a rotating shaft (12), characterized in that: A sealing plate (2) is installed at one end of the motor housing (1) near the rear end cover (14); a fan shaft (3) is rotatably installed at the center position of the sealing plate (2) and a plurality of fan blades (31) are evenly installed at the end of the fan shaft (3); the fan shaft (3) is rotatably connected to the rotating shaft (12); an axial sliding groove A (32) is coaxially provided at the end of the fan shaft (3); an axial sliding groove B (121) is coaxially provided at the end of the rotating shaft (12); a connecting column (4) is slidably installed in the axial sliding cavity formed by the axial sliding groove A (32) and the axial sliding groove B (121); The sealing plate (2) is provided with strip-shaped ventilation holes (21) evenly distributed in an annular pattern; a retractable corrugated sheet (5) is slidably mounted in the strip-shaped ventilation holes (21); a driving component is mounted on the sealing plate (2); the driving component drives the retractable corrugated sheet (5) to retract or extend, and simultaneously drives the connecting column (4) to connect or disconnect the rotating shaft (12) and the fan shaft (3).

2. A motor heat dissipation device as claimed in claim 1, characterized in that: The driving assembly comprises a memory spring A (61) and a T-shaped slider (62); the strip-shaped air vent (21) is symmetrically slidably mounted on both sides of the strip-shaped air vent (21); both ends of the T-shaped slider (62) are slidably mounted in the strip-shaped air vent (211); both sides of the retractable corrugated sheet (5) are slidably mounted in the strip-shaped air vent (211), and both ends of the retractable corrugated sheet (5) are respectively connected to the T-shaped slider (62) and one end of the strip-shaped air vent (21); the T-shaped slider (62) is embedded with a magnet A (621); both ends of the memory spring A (61) are respectively connected to the T-shaped slider (62) and one end of the strip-shaped air vent (21); A strip-shaped sliding hole (321) is slidably mounted on the circumferential side of the axial sliding groove A (32); a plurality of limiting sliding blocks (41) are evenly distributed in an annular manner at the rear end of the connecting column (4); the limiting sliding block (41) is slidably mounted in the strip-shaped sliding hole (321); a magnet B (411) is embedded in the limiting sliding block (41); and the rear end of the connecting column (4) is connected to the bottom of the axial sliding groove A (32) via a spring (42).

3. A motor heat dissipation device as claimed in claim 2, characterized in that: The front end of the connecting column (4) is evenly provided with a plurality of teeth (43) in an annular shape; and the bottom of the axial sliding groove B (121) is evenly provided with a plurality of tooth grooves matching the teeth (43).

4. A motor heat dissipation device as claimed in claim 3, characterized in that: A cylindrical cavity (44) is provided in the connecting column (4).

5. A motor heat dissipation device as claimed in claim 4, characterized in that: The end of the fan shaft (3) is provided with an external rotatable mounting flange A (33); the end of the rotating shaft (12) is provided with an external fixed mounting flange B (122); the flange A (33) is connected to the flange B (122) by screws.

6. A motor heat dissipation device as claimed in claim 5, characterized in that: The rear end cover (14) has a plurality of arc-shaped air holes (141) evenly distributed in an annular shape.

7. A motor heat dissipation device as claimed in claim 6, characterized in that: The outer side surface of the front part of the motor housing (1) is provided with strip-shaped air inlet holes (15) evenly distributed in a circular pattern; the inner side surface of the motor housing (1) is provided with spring grooves (16) connected to the strip-shaped air inlet holes (15) evenly distributed in a circular pattern; limiting grooves (151) are symmetrically provided on both sides of the strip-shaped air inlet holes (15), and the limiting grooves (151) extend into the spring grooves (16); an arc-shaped corrugated expansion piece (71) is slidably installed between the two limiting grooves (151); the two ends of the arc-shaped corrugated expansion piece (71) are respectively connected to one end of the strip-shaped air inlet holes (15) and one side of the arc-shaped slider (72); the two ends of the arc-shaped slider (72) are slidably installed in the limiting grooves (151); one side of the arc-shaped slider (72) is connected to a memory spring B (73), and the other end of the memory spring B (73) is fixedly installed on one side of the spring groove (16).

8. A motor heat dissipation device as claimed in claim 7, characterized in that: The sealing plate (2) has rectangular air holes (22) evenly distributed in a circular pattern on the side surface; a plurality of light baffles (81) are evenly and rotatably mounted in the rectangular air holes (22); the baffle shafts of the light baffles (81) are rotatably mounted between the two side walls of the rectangular air holes (22); a torsion spring is fixedly mounted at the end of the baffle shaft and the torsion arm of the torsion spring is fixedly mounted on the inner side of the baffle shaft groove.

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