A DC brushless motor heat dissipation device for household sweeping machine

Abstract

The present invention relates to the field of brushless motor accessories, and in particular to a DC brushless motor heat dissipation device for a household sweeper. The device includes a base plate, a sweeper housing, a motor support frame, a brushless motor, etc.; the sweeper housing is fixedly connected to the side of the base plate, the motor support frame is fixedly connected to the base plate, and the brushless motor is fixedly connected to the motor support frame. When the sweeper is working, heat is generated, causing the brushless motor to heat up. When the heat dissipation exhaust fan is started, the heat on the surface of the brushless motor is absorbed through a number of suction holes on the annular perforated suction plate, and discharged outside the sweeper, dissipating the heat of the brushless motor, and then dissipating the heat of the sweeper.

Description

Technical Field

[0001] The invention relates to the field of brushless motor accessories, and in particular to a direct current brushless motor heat dissipation device for a household sweeping machine. Background Art

[0002] A sweeping machine is a sweeping robot. With the continuous improvement of domestic living standards, sweeping machines will become an indispensable cleaning helper for every family in the near future, just like white appliances, and will be accepted by more and more people. Most household sweeping machines are operated by brushless DC motors. Brushless DC motors are composed of a motor body and a driver, and are a typical mechatronic product.

[0003] At present, most household sweepers use air cooling to dissipate heat from the motor, and the heat dissipation efficiency is relatively low. In addition, since a lot of dust will float into the inside of the sweeper when it is working, it is not convenient to clean the dust on the internal motor of the current household sweeper. The dust attached to the motor may cause the motor to be unable to dissipate heat normally and easily overheat, thereby causing heat accumulation in the sweeper. The heat accumulation of the sweeper will reduce the working efficiency and service life, and even cause the internal parts of the sweeper to burn out.

[0004] Therefore, we urgently need to invent a DC brushless motor heat dissipation device for a household sweeper, which can more fully clean the dust on the motor, dissipate the heat of the sweeper more quickly, and more effectively prevent the sweeper from accumulating heat. Summary of the invention

[0005] In order to overcome the above-mentioned shortcomings, the present invention provides a DC brushless motor heat dissipation device for a household sweeping machine, which can more fully clean the dust on the motor, dissipate the heat of the sweeping machine more quickly, and more effectively prevent the sweeping machine from accumulating heat.

[0006] A DC brushless motor heat dissipation device for a household sweeping machine comprises a base plate, a sweeping machine housing, a motor support frame, a brushless motor, a transmission shaft, a reciprocating power mechanism and a dust removal and heat dissipation mechanism, wherein the sweeping machine housing is fixedly connected to the side surface of the base plate, the motor support frame is fixedly connected to the base plate, the brushless motor is fixedly connected to the motor support frame, the transmission shaft is fixedly connected to the output shaft of the brushless motor, the motor support frame is provided with a reciprocating power mechanism, and the base plate is provided with a dust removal and heat dissipation mechanism.

[0007] Furthermore, a plurality of heat dissipation holes are provided on the bottom plate.

[0008] Furthermore, the reciprocating power mechanism includes a bidirectional screw, a slotted pinion, a limiting ring, a long push rod, a large gear and a limiting protrusion. The upper part of the motor support frame is rotatably connected with the bidirectional screw, and the side of the bidirectional screw away from the motor support frame is slidably connected with the slotted pinion and the limiting ring. The slotted pinion is fixedly connected to the limiting ring, and four card holes are provided on one side of the slotted pinion. The limiting ring is rotatably connected with a long push rod, and the long push rod is slidably connected to the housing of the sweeper, and the transmission shaft is fixedly connected with a large gear, and the large gear will mesh with the slotted pinion, and the bidirectional screw is fixedly connected with a limiting protrusion.

[0009] Furthermore, the long push rod is made of anti-slip material.

[0010] Furthermore, the dust removal and heat dissipation mechanism includes a heat dissipation fan, a movable semicircular frame 1, a movable semicircular frame 2, an annular perforated suction plate, a hose, a collection frame and a filter screen, the heat dissipation fan is fixedly connected to the bottom plate, the upper portion of the motor support frame is slidably connected to the movable semicircular frame 1, and the movable semicircular frame 1 is threadedly connected to the bidirectional screw, the lower portion of the motor support frame is slidably connected to the movable semicircular frame 2, an annular perforated suction plate is slidably connected between the movable semicircular frame 1 and the movable semicircular frame 2, the brushless motor is located in the annular perforated suction plate, a plurality of suction holes are provided on the inner side of the annular perforated suction plate, one end of the hose is connected to the annular perforated suction plate, and the other end of the hose is connected to the heat dissipation fan, the bottom plate is connected to the collection frame, the heat dissipation fan is connected to the collection frame, the bottom plate is fixedly connected to the filter screen, and the filter screen is located directly below the collection frame.

[0011] Furthermore, it also includes a swing mechanism, the motor support frame is provided with a swing mechanism, and the swing mechanism is connected to the annular perforated suction plate, the swing mechanism includes an arc groove guide plate, a guide round rod and bristles, the motor support frame is fixedly connected with an arc groove guide plate on the side away from the heat dissipation exhaust fan, the arc groove guide plate is provided with a guide groove, the annular perforated suction plate is fixedly connected with a guide round rod on the side away from the heat dissipation exhaust fan, a plurality of bristles are fixedly connected to the inner side of the annular perforated suction plate, and the plurality of bristles are in contact with the outer wall of the brushless motor.

[0012] Furthermore, it also includes a dredging mechanism. The brushless motor is provided with a dredging mechanism, and the dredging mechanism includes a slotted support ring, a beveled slotted top rod, a return spring and a guide bent rod. The brushless motor is fixedly connected to the slotted support ring, and the transmission shaft passes through the slotted support ring. A plurality of beveled slotted top rods are sleeved on the slotted support ring, and each of the beveled slotted top rods is provided with two curved grooves. One end of a plurality of return springs is fixedly connected to the slotted support ring, and the beveled slotted top rod is rotatably connected to the other end of the return spring, and the return spring is sleeved on the beveled slotted top rod. A plurality of guide bent rods are fixedly connected to the inner side of the slotted support ring, and two of the guide bent rods form a group, and the guide bent rod is slidably connected to the curved groove of the beveled slotted top rod.

[0013] Furthermore, it also includes an inclined slotted top rod, and a plurality of slots are formed on the top of the inclined slotted top rod.

[0014] Furthermore, it also includes a supporting ring rod and a bending lever. Two supporting ring rods are fixedly connected between the movable semicircular frame 1 and the movable semicircular frame 2, and a plurality of bending levers are fixedly connected to the two supporting ring rods.

[0015] Furthermore, it also includes fan blades, and a plurality of fan blades are evenly spaced on the transmission shaft.

[0016] Beneficial effects:

[0017] 1. When the sweeper is started, the cooling exhaust fan will be driven to operate. When the sweeper is working, it will generate heat, making the brushless motor hot. When the cooling exhaust fan is started, it will absorb the heat on the surface of the brushless motor through several suction holes on the annular perforated suction plate and discharge it out of the sweeper to dissipate the heat of the brushless motor, and then dissipate the heat of the sweeper, so that the sweeper can maintain normal operation.

[0018] 2. If the surface of the sweeper shell becomes hot, the user can push the long push rod to move it, so that the slotted pinion and the limit bump are clamped, and the transmission shaft drives the bidirectional screw to rotate, thereby driving the annular perforated suction plate to move back and forth left and right on the outside of the brushless motor, so as to more fully absorb the heat emitted by the brushless motor, and discharge the absorbed heat out of the sweeper through the heat dissipation exhaust fan, thereby quickly dissipating the heat of the brushless motor, thereby quickly dissipating the heat of the sweeper, reducing the occurrence of heat accumulation in the sweeper, and extending the working efficiency and life of the sweeper.

[0019] 3. The reciprocating movement of the annular perforated suction plate will drive the guide round rod and several bristles to move back and forth, and the reciprocating movement of several bristles will brush off the dust on the surface of the brushless motor. At the same time, the reciprocating rotation of the annular perforated suction plate will drive the reciprocating rotation of several bristles. The reciprocating rotation of several bristles can more fully brush off the dust attached to the surface of the brushless motor to avoid dust accumulation on the surface of the brushless motor and affecting the heat dissipation of the brushless motor. The brushed dust will be concentrated in the collection frame, and the reciprocating movement of the guide round rod will drive the annular perforated suction plate to rotate back and forth, increasing the adsorption area of ​​the annular perforated suction plate on the brushless motor, allowing the annular perforated suction plate to more fully absorb the heat emitted by the brushless motor and the dust on the surface, thereby more effectively dissipating the heat of the brushless motor, allowing the sweeper to dissipate heat more quickly, further reducing the occurrence of heat accumulation in the sweeper, and further extending the life of the sweeper.

[0020] 4. The movement of the annular perforated suction plate will intermittently squeeze several inclined slotted ejector rods to move towards each other. At the same time, the reset of the inclined slotted ejector rod will insert it into the suction hole of the annular perforated suction plate to clean the dust in the suction hole, thereby making the inclined slotted ejector rod intermittently clean the suction hole of the annular perforated suction plate to prevent dust from blocking the suction hole of the annular perforated suction plate, resulting in the annular perforated suction plate being unable to absorb the heat emitted by the brushless motor and the dust on the surface, affecting the heat dissipation efficiency of the brushless motor, so that the annular perforated suction plate can continuously dissipate the heat of the brushless motor, making the heat dissipation effect of the brushless motor better. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of a first partial three-dimensional structure of the reciprocating power mechanism and the dust removal and heat dissipation mechanism of the present invention.

[0023] Figure 3 It is a schematic diagram of a second partial three-dimensional structure of the reciprocating power mechanism and the dust removal and heat dissipation mechanism of the present invention.

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged three-dimensional structure of A in the middle.

[0025] Figure 5 It is a schematic diagram of a first partial three-dimensional structure of the dust removal and heat dissipation mechanism and the swing mechanism of the present invention.

[0026] Figure 6 It is a partial three-dimensional structural schematic diagram of the reciprocating power mechanism and the swing mechanism of the present invention.

[0027] Figure 7 It is a schematic diagram of a second partial three-dimensional structure of the dust removal and heat dissipation mechanism and the swing mechanism of the present invention.

[0028] Figure 8 It is a third partial three-dimensional structural schematic diagram of the reciprocating power mechanism and the dust removal and heat dissipation mechanism of the present invention.

[0029] Fig. 9 It is a schematic diagram of a first partial three-dimensional structure of the swing mechanism of the present invention.

[0030] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged three-dimensional structure of B in the figure.

[0031] Fig.11 It is a partial cross-sectional three-dimensional structural schematic diagram of the dust removal and heat dissipation mechanism of the present invention.

[0032] Fig.12 For the present invention Fig.11 Schematic diagram of the enlarged three-dimensional structure of C in the middle.

[0033] Fig.13 It is a schematic diagram of a second partial three-dimensional structure of the swing mechanism of the present invention.

[0034] Fig.14 For the present invention Fig.13 Schematic diagram of the enlarged three-dimensional structure of D in the middle.

[0035] Figure numbers: 1_bottom plate, 2_sweeping machine housing, 31_motor support frame, 32_brushless motor, 33_transmission shaft, 41_bidirectional screw, 42_slotted pinion, 43_limiting ring, 44_long push rod, 45_large gear, 46_limiting bump, 51_heat dissipation fan, 52_movable semicircular frame one, 53_movable semicircular frame two, 54_annular perforated suction plate, 55_hose, 56_collection frame, 57_filter, 61_arc groove guide plate, 62_guide round rod, 63_brush, 71_slotted support ring, 72_inclined slotted top rod, 73_reset spring, 74_guide bent rod, 81_support ring rod, 82_bent lever, 9_fan blades. DETAILED DESCRIPTION

[0036] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, and bonding in the prior art, which will not be described in detail here.

[0037] Example 1

[0038] A brushless DC motor heat dissipation device for a household sweeper, such as Figure 1-Figure 14As shown, it includes a base plate 1, a sweeping machine housing 2, a motor support frame 31, a brushless motor 32, a transmission shaft 33, a reciprocating power mechanism and a dust removal and heat dissipation mechanism. The upper side of the base plate 1 is connected to the sweeping machine housing 2 by bolts, the base plate 1 is connected to the motor support frame 31 by bolts, the motor support frame 31 is connected to the brushless motor 32 by a pin, the output shaft of the brushless motor 32 is fixedly connected to the transmission shaft 33, the transmission shaft 33 is horizontally arranged, the motor support frame 31 is provided with a reciprocating power mechanism, and the base plate 1 is provided with a dust removal and heat dissipation mechanism.

[0039] The bottom plate 1 is provided with a plurality of heat dissipation holes.

[0040] The reciprocating power mechanism includes a bidirectional screw 41, a slotted pinion 42, a limiting ring 43, a long push rod 44, a large gear 45 and a limiting protrusion 46. The upper part of the motor support frame 31 is rotatably connected with the bidirectional screw 41, and the bidirectional screw 41 is horizontally arranged. The side of the bidirectional screw 41 away from the motor support frame 31 is slidably connected with the slotted pinion 42 and the limiting ring 43. The slotted pinion 42 is fixedly connected to the limiting ring 43, and four card holes are provided on one side of the slotted pinion 42. The limiting ring 43 is rotatably connected with a long push rod 44, and the long push rod 44 is slidably connected to the sweeper housing 2. The transmission shaft 33 is connected with a large gear 45 through a flat key, and the large gear 45 will mesh with the slotted pinion 42. The bidirectional screw 41 is fixedly connected with a limiting protrusion 46.

[0041] The long push rod 44 is made of anti-slip material.

[0042] The dust removal and heat dissipation mechanism includes a heat dissipation fan 51, a movable semicircular frame 1 52, a movable semicircular frame 2 53, an annular perforated suction plate 54, a hose 55, a collection frame 56 and a filter 57. The heat dissipation fan 51 is connected to the bottom plate 1 by bolts, the upper part of the motor support frame 31 is slidably connected to the movable semicircular frame 1 52, and the movable semicircular frame 1 52 is threadedly connected to the bidirectional screw 41, the lower part of the motor support frame 31 is slidably connected to the movable semicircular frame 2 53, and the movable semicircular frame 1 52 is connected to the movable semicircular frame 41 by threads. An annular perforated suction plate 54 is slidably connected between the frame 2 53, the brushless motor 32 is located in the annular perforated suction plate 54, a plurality of suction holes are provided on the inner side of the annular perforated suction plate 54, one end of a hose 55 is connected to the annular perforated suction plate 54, and the other end of the hose 55 is connected to the heat dissipation exhaust fan 51, a collecting frame 56 is connected to the bottom plate 1, the heat dissipation exhaust fan 51 is connected to the collecting frame 56, a filter screen 57 is connected to the bottom plate 1 by bolts, and the filter screen 57 is located directly below the collecting frame 56.

[0043] First, the user starts the sweeper, which will drive the cooling fan 51 to operate. When the sweeper is working, heat will be generated, making the brushless motor 32 hot. When the cooling fan 51 is started, the heat on the surface of the brushless motor 32 will be absorbed through the hose 55 and the several suction holes on the annular perforated suction plate 54, and discharged out of the sweeper through the collection frame 56 and the filter 57, so as to dissipate the heat of the brushless motor 32, and then dissipate the heat of the sweeper to keep the sweeper working normally. If the surface of the sweeper housing 2 is hot, it means that the surface of the sweeper needs to be further cooled. At this time, the user can push the long push rod 44 to get close to the brushless motor 3 2, the movement of the long push rod 44 will drive the limit ring 43 to move, the movement of the limit ring 43 will drive the slotted pinion 42 to move, the movement of the slotted pinion 42 will contact the limit protrusion 46, and the limit protrusion 46 will be stuck in the four clamping holes of the slotted pinion 42, the limit protrusion 46 will limit the slotted pinion 42, and the movement of the slotted pinion 42 will mesh with the large gear 45. Since the operation of the sweeper will drive the transmission shaft 33 to rotate, the rotation of the transmission shaft 33 will drive the large gear 45 to rotate, and the rotation of the large gear 45 will drive the slotted pinion 42 meshing with it to rotate, and the rotation of the slotted pinion 42 will drive the limit protrusion 46 The rotation of the limiting protrusion 46 will drive the two-way screw 41 to rotate together with the limiting ring 43, and the rotation of the two-way screw 41 will drive the movable semicircular frame 1 52 to move back and forth left and right. The reciprocating movement of the movable semicircular frame 1 52 will drive the annular perforated suction plate 54 to move back and forth left and right outside the brushless motor 32. The reciprocating movement of the annular perforated suction plate 54 will drive the movable semicircular frame 2 53 to move back and forth left and right. The reciprocating movement of the annular perforated suction plate 54 will fully absorb the heat emitted by the brushless motor 32, and discharge the absorbed heat outside the sweeper through the hose 55, the heat dissipation fan 51, the collection frame 56 and the filter 57, thereby cooling the brushless motor 3 2 for rapid heat dissipation, thereby rapidly dissipating heat for the sweeping machine, reducing the occurrence of heat accumulation in the sweeping machine, and extending the working efficiency and life of the sweeping machine. When the surface of the sweeping machine housing 2 is no longer hot, the user pulls the long push rod 44 to reset in a direction away from the brushless motor 32. The reset of the long push rod 44 will drive the limit ring 43 to reset, and the reset of the limit ring 43 will drive the slotted pinion 42 to reset. The reset of the slotted pinion 42 will disengage from the limit protrusion 46, so that the annular perforated suction plate 54 will no longer move. The purpose of this is to reduce the energy consumption of the sweeping machine, allowing the sweeping machine to save more electricity while rapidly dissipating heat, thereby extending the working time of the sweeping machine.

[0044] Example 2

[0045] On the basis of Example 1, Figure 5-Figure 13As shown, a swing mechanism is also included. The motor support frame 31 is provided with a swing mechanism, and the swing mechanism is connected to the annular perforated suction plate 54. The swing mechanism includes an arc groove guide plate 61, a guide round rod 62 and bristles 63. The side of the motor support frame 31 away from the heat dissipation exhaust fan 51 is connected to the arc groove guide plate 61 by bolts. The arc groove guide plate 61 is provided with a guide groove. The side of the annular perforated suction plate 54 away from the heat dissipation exhaust fan 51 is connected to the guide round rod 62 by bolts. A plurality of bristles 63 are fixedly connected to the inner side of the annular perforated suction plate 54, and the plurality of bristles 63 are in contact with the outer wall of the brushless motor 32.

[0046] The reciprocating movement of the annular hole suction plate 54 will drive the guide round rod 62 and a plurality of bristles 63 to move back and forth together. The reciprocating movement of the plurality of bristles 63 will brush away the dust on the surface of the brushless motor 32. The brushed dust will enter the collection frame 56 through the hose 55 and the heat dissipation exhaust fan 51. The filter 57 will filter the adsorbed dust and concentrate it in the collection frame 56 to prevent the adsorbed dust from being discharged out of the sweeper with the air and dirtying the ground. The guide round rod 62 reciprocates left and right while swinging up and down along the guide groove of the arc-shaped groove guide plate 61. The reciprocating up and down swinging of the guide round rod 62 will drive the annular hole suction plate 54 to rotate back and forth. The annular hole suction plate 54 reciprocates The movement can increase the adsorption area of ​​the annular perforated suction plate 54 on the brushless motor 32, and can make the annular perforated suction plate 54 better adsorb the heat emitted by the brushless motor 32 and the dust on the surface. At the same time, the reciprocating rotation of the annular perforated suction plate 54 will drive the reciprocating rotation of the plurality of bristles 63. The reciprocating rotation of the plurality of bristles 63 can more fully brush away the dust attached to the surface of the brushless motor 32, and avoid the accumulation of dust on the surface of the brushless motor 32, which affects the heat dissipation of the brushless motor 32, and further effectively dissipate the heat of the brushless motor 32, so that the sweeper can dissipate heat more quickly, further reduce the occurrence of heat accumulation in the sweeper, and further extend the working efficiency and life of the sweeper.

[0047] Example 3

[0048] On the basis of Example 2, Figure 4-Figure 12As shown, a dredging mechanism is also included. The brushless motor 32 is provided with a dredging mechanism, and the dredging mechanism includes a slotted support ring 71, a beveled slotted top rod 72, a reset spring 73 and a guide bent rod 74. The brushless motor 32 is connected to the slotted support ring 71 by bolts, and the transmission shaft 33 passes through the slotted support ring 71. A plurality of beveled slotted top rods 72 are sleeved on the slotted support ring 71, and each of the beveled slotted top rods 72 is provided with two curved grooves. One end of a plurality of reset springs 73 is connected to the slotted support ring 71 by a hook, and the beveled slotted top rod 72 is rotatably connected to the other end of the reset spring 73, and the reset spring 73 is sleeved on the beveled slotted top rod 72. A plurality of guide bent rods 74 are fixedly connected to the inner side of the slotted support ring 71, and two of the guide bent rods 74 form a group, and the guide bent rods 74 are slidably connected to the curved groove of the beveled slotted top rod 72.

[0049] A plurality of grooves are formed on the top of the inclined slotted top rod 72 .

[0050] When the annular hole suction plate 54 moves in the direction close to the long push rod 44, it will contact with the plurality of inclined surface slotted ejector rods 72 and squeeze the plurality of inclined surface slotted ejector rods 72 to move in the direction close to each other. When the plurality of inclined surface slotted ejector rods 72 move in the direction close to each other, they will rotate along the curved groove of the inclined surface slotted ejector rod 72, and the plurality of return springs 73 will be compressed, and the annular hole suction plate 54 will continue to move in the direction close to the long push rod 44, so that the suction hole and the inclined surface slotted ejector rod 72 are in the same position. At this time, the annular hole suction plate 54 no longer squeezes the plurality of inclined surface slotted ejector rods 72, and the reset spring 73 resets the inclined surface slotted ejector rod 72 to reset, and the inclined surface slotted ejector rod 72 resets to be inserted into the suction hole of the annular hole suction plate 54, and at the same time, the plurality of inclined surface slotted ejector rods 72 will rotate in the opposite direction along the curved groove of the inclined surface slotted ejector rod 72, and the inclined surface slotted ejector rod 72 will rotate in the opposite direction. The rotation will clean the dust in the suction hole of the annular hole suction plate 54, and the annular hole suction plate 54 moving in the direction away from the long push rod 44 will push the several inclined surface slotted top rods 72 to move in the direction close to each other again, and the reset spring 73 will be compressed, and the annular hole suction plate 54 will continue to move in the direction away from the long push rod 44 and will no longer squeeze the several inclined surface slotted top rods 72, and the reset spring 73 will drive the inclined surface slotted top rod 72 to reset, and repeat this process, thereby intermittently cleaning the suction hole of the annular hole suction plate 54 to prevent dust from blocking the suction hole of the annular hole suction plate 54, resulting in the annular hole suction plate 54 being unable to absorb the heat emitted by the brushless motor 32 and the dust on the surface, affecting the heat dissipation efficiency of the brushless motor 32, so that the annular hole suction plate 54 can continuously dissipate the heat of the brushless motor 32, so that the heat dissipation effect of the brushless motor 32 is better.

[0051] Example 4

[0052] On the basis of Example 3, Figure 5-Figure 13 As shown, it also includes a support ring rod 81 and a bending lever 82. The two support ring rods 81 are connected between the movable semicircular frame 1 52 and the movable semicircular frame 2 53 by bolts, and a plurality of bending levers 82 are connected to the two support ring rods 81 by bolts.

[0053] When the movable semicircular frame 1 52 and the movable semicircular frame 2 53 move back and forth left and right, they will drive the two supporting ring rods 81 to move back and forth left and right. Since a number of bristles 63 will rotate back and forth, they will constantly contact and collide with the bending lever 82 during the reciprocating rotation of the bristles 63. The bending lever 82 will knock the dust on the bristles 63 off, allowing the bristles 63 to more fully clean the dust on the surface of the brushless motor 32.

[0054] Example 5

[0055] On the basis of Example 4, Figure 4-Figure 7 As shown, fan blades 9 are also included, and a plurality of fan blades 9 are evenly spaced on the transmission shaft 33 .

[0056] The rotation of the transmission shaft 33 will drive the plurality of fan blades 9 to rotate. The rotation of the plurality of fan blades 9 will speed up the air circulation speed inside the sweeper, so that the heat of the brushless motor 32 can be more dissipated, and the motor of the sweeper can dissipate heat more quickly.

[0057] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A brushless DC motor heat dissipation device for a household sweeping machine, characterized in that: The utility model comprises a bottom plate (1), a sweeping machine housing (2), a motor support frame (31), a brushless motor (32), a transmission shaft (33), a reciprocating power mechanism and a dust removal and heat dissipation mechanism, wherein the upper side of the bottom plate (1) is fixedly connected to the sweeping machine housing (2), the bottom plate (1) is fixedly connected to the motor support frame (31), the motor support frame (31) is fixedly connected to the brushless motor (32), the output shaft of the brushless motor (32) is fixedly connected to the transmission shaft (33), the motor support frame (31) is provided with a reciprocating power mechanism, and the bottom plate (1) is provided with a dust removal and heat dissipation mechanism; The reciprocating power mechanism comprises a bidirectional screw (41), a slotted pinion (42), a limiting ring (43), a long push rod (44), a large gear (45) and a limiting protrusion (46); the upper part of the motor support frame (31) is rotatably connected to the bidirectional screw (41); the side of the bidirectional screw (41) away from the motor support frame (31) is slidably connected to the slotted pinion (42) and the limiting ring (43); the slotted pinion (42) is fixedly connected to the limiting ring (43); one side of the slotted pinion (42) is provided with four clamping holes; the limiting ring (43) is rotatably connected to the long push rod (44); the long push rod (44) is slidably connected to the housing (2) of the sweeper; the transmission shaft (33) is fixedly connected to the large gear (45); the large gear (45) meshes with the slotted pinion (42); and the bidirectional screw (41) is fixedly connected to the limiting protrusion (46); The dust removal and heat dissipation mechanism comprises a heat dissipation fan (51), a movable semicircular frame 1 (52), a movable semicircular frame 2 (53), an annular perforated suction plate (54), a hose (55), a collection frame (56) and a filter screen (57); the heat dissipation fan (51) is fixedly connected to the bottom plate (1); the upper part of the motor support frame (31) is slidably connected to the movable semicircular frame 1 (52), and the movable semicircular frame 1 (52) is threadedly connected to the bidirectional screw (41); the lower part of the motor support frame (31) is slidably connected to the movable semicircular frame 2 (53), and the movable semicircular frame 1 (52) and the movable semicircular frame 2 are connected to each other. An annular perforated suction plate (54) is slidably connected between the brushless motor (32) and the annular perforated suction plate (54). A plurality of suction holes are provided on the inner side of the annular perforated suction plate (54). One end of a hose (55) is connected to the annular perforated suction plate (54), and the other end of the hose (55) is connected to the heat dissipation fan (51). A collection frame (56) is connected to the bottom plate (1), and the heat dissipation fan (51) is connected to the collection frame (56). A filter screen (57) is fixedly connected to the bottom plate (1), and the filter screen (57) is located directly below the collection frame (56).

2. A brushless DC motor heat dissipation device for a household sweeping machine according to claim 1, characterized in that: The bottom plate (1) is provided with a plurality of heat dissipation holes.

3. A brushless DC motor heat dissipation device for a household sweeping machine according to claim 1, characterized in that: The long push rod (44) is made of anti-slip material.

4. A brushless DC motor heat dissipation device for a household sweeping machine according to claim 1, characterized in that: The motor support frame (31) further comprises a swing mechanism, wherein the swing mechanism is provided on the motor support frame (31), and the swing mechanism is connected to the annular perforated suction plate (54), and the swing mechanism comprises an arc-shaped groove guide plate (61), a guide round rod (62) and bristles (63). The side of the motor support frame (31) away from the heat dissipation fan (51) is fixedly connected to the arc-shaped groove guide plate (61), and the arc-shaped groove guide plate (61) is provided with a guide groove. The side of the annular perforated suction plate (54) away from the heat dissipation fan (51) is fixedly connected to the guide round rod (62), and the inner side of the annular perforated suction plate (54) is fixedly connected to a plurality of bristles (63), and the plurality of bristles (63) are in contact with the outer wall of the brushless motor (32).

5. A brushless DC motor heat dissipation device for a household sweeping machine according to claim 4, characterized in that: The brushless motor (32) is provided with a dredging mechanism, the dredging mechanism comprising a slotted support ring (71), an inclined slotted top rod (72), a return spring (73) and a guide bent rod (74); the brushless motor (32) is fixedly connected with the slotted support ring (71); the transmission shaft (33) passes through the slotted support ring (71); a plurality of inclined slotted top rods (72) are sleeved on the slotted support ring (71); each of the inclined slotted top rods (72) is provided with a There are two curved grooves, one end of a plurality of return springs (73) is fixedly connected to the grooved support ring (71), and the inclined grooved top rod (72) is rotatably connected to the other end of the return spring (73), the return spring (73) is sleeved on the inclined grooved top rod (72), and a plurality of guide curved rods (74) are fixedly connected to the inner side of the grooved support ring (71), two of the guide curved rods (74) form a group, and the guide curved rods (74) are slidably connected to the curved grooves of the inclined grooved top rod (72).

6. A brushless DC motor heat dissipation device for a household sweeping machine according to claim 5, characterized in that: A plurality of slots are formed on the top of the inclined slotted top rod (72).

7. A brushless DC motor heat dissipation device for a household sweeping machine according to claim 5, characterized in that: It also includes a supporting ring rod (81) and a bending lever (82), wherein two supporting ring rods (81) are fixedly connected between the movable semicircular frame 1 (52) and the movable semicircular frame 2 (53), and a plurality of bending levers (82) are fixedly connected to the two supporting ring rods (81).

8. A brushless DC motor heat dissipation device for a household sweeping machine according to claim 7, characterized in that: It also includes fan blades (9), with a plurality of fan blades (9) being evenly spaced apart on the transmission shaft (33).

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