A DC motor filtering and heat dissipation device

Abstract

The present invention relates to the technical field of DC motors, and discloses a DC motor filtering and heat dissipation device, comprising a motor body, an axial flow fan and a heat dissipation box are arranged on the top of the motor body, an air outlet is arranged on the front, the air inlet end of the axial flow fan is connected to the right side of the heat dissipation box, and the air outlet end is connected to the top of the motor body, an air filter component and a heat absorption component are arranged in the heat dissipation box, and the heat absorption component includes a cold water tank, a water cooling module, a cold water circulation pipe and a plurality of heat sinks, the cold water tank is separately arranged outside the motor body, and the cold water circulation pipe is installed in the inner cavity of the cold water tank. The present invention has the following advantages and effects: the internal temperature of the motor can be quickly reduced while the internal dust can be taken away.

Description

Technical Field

[0001] The invention relates to the technical field of direct current motors, and in particular to a filtering and heat dissipating device for a direct current motor. Background Art

[0002] There are a certain number of DC motors in cable production equipment. If the motors are involved in production for a long time, they will overheat. In addition, because there is dust in the production environment, it will enter the inside of the motor. These two reasons will eventually reduce the service life of the motor.

[0003] After searching, the authorization publication number is: CN 114337061 B. A heat dissipation device for a brushless motor is proposed. The connecting mechanism in this case includes a T-shaped rod, a diamond hinge rod, a No. 1 plate and a plug rod; a cavity is arranged in the wall body of the annular plate, the No. 1 plate is slidably connected in the cavity, the plug rod is fixedly connected to one side of the No. 1 plate, and a plug hole is opened in the outer wall of the dustproof shell; the top end of the diamond hinge rod is hinged to the inner wall of the cavity; the installation of the dustproof shell is convenient and quick, and the dustproof shell is easy to replace, so as to avoid the clogging of the filter screen inside the dustproof shell due to dust accumulation, thereby ensuring the heat dissipation effect of the motor, but the heat dissipation method of the motor is mainly to cool the motor surface by cold water, and its cooling efficiency is not high. Moreover, under long-term use, it is difficult to handle the dust inside the motor, so that the dust generated during the armature operation is easily accumulated, which not only affects the working efficiency of the motor, but also easily causes damage. Therefore, it is necessary to propose a DC motor filtering and heat dissipation device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a filtering and cooling device for a DC motor, which has the effect of rapidly cooling the inside of the motor and taking away the dust inside.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a DC motor filtering and heat dissipation device, comprising a motor body, an axial flow fan and a heat sink are arranged on the top of the motor body, an air outlet is arranged on the front, the air inlet end of the axial flow fan is connected to the right side of the heat sink, and the air outlet end is connected to the top of the motor body, an air filtering component and a heat absorbing component are arranged in the heat sink, the heat absorbing component comprises a cold water tank, a water cooling module, a cold water circulation pipe and a plurality of heat sinks, the cold water tank is separately arranged outside the motor body, the cold water circulation pipe is installed in the inner cavity of the heat sink, the water cooling module is installed at the upper end of the cold water tank, and the two ends are respectively connected to the cold water tank and the cold water circulation pipe through water pipes, a plurality of the heat sinks are equidistantly arranged at the bottom of the inner cavity of the heat sink, and the upper ends of the heat sinks are in contact with the cold water circulation pipe, and the lower ends are in contact with the top wall of the motor body, and a protective mechanism is arranged at the opening of the heat sink and the air outlet.

[0006] By adopting the above technical scheme, the cold water in the cold water tank is extracted and cooled by the water cooling module, and then sent to the cold water circulation pipe in the heat sink, and then the air is blown into the heat sink through the axial flow fan. When the airflow passes through the air filter component, the dust impurities in the airflow can be filtered, and then the airflow passes through the cold water circulation pipe for cooling treatment to form cold air, and then the cold air is continuously blown into the motor body through the output end of the axial flow fan, so that the hot air in the motor body is discharged through the air outlet, and the internal dust is also taken away. The cold water circulation pipe and the heat sink can also cool the surface of the motor body, thereby greatly improving the heat dissipation effect of the motor, making the working environment of the motor safer and more stable.

[0007] The present invention is further configured as follows: the air filter component includes a fixed filter plate and a sliding filter plate installed in the inner cavity of the heat sink, filter cotton is arranged between the fixed filter plate and the sliding filter plate, two telescopic plug rods symmetrical front and back are arranged on the left side of the top of the heat sink, the telescopic plug rods fix the sliding filter plate in the inner cavity of the heat sink, the inner cavity of the heat sink is also provided with guide rods located on both sides of the top of the sliding filter plate, and one side of the top of the sliding filter plate is provided with a guide block that is respectively slidably adapted to the two guide rods.

[0008] By adopting the above technical scheme, when the airflow passes through the filter cotton, dust impurities can be filtered and dried, so that the airflow that is about to be blown into the motor body is cleaner and drier, thereby preventing damage to the motor. The filter cotton needs to be replaced regularly. When replacing, first pull out the telescopic rods on both sides to no longer restrict the sliding filter plate. With the sliding cooperation of the guide block and the guide rod, the sliding filter plate can be quickly and stably pulled out, so that the staff can easily remove the filter cotton placed on the upper end of the fixed filter plate, and then reset and fix the sliding filter plate, thereby facilitating and quickly realizing the replacement of the filter cotton and improving the convenience of using the device.

[0009] The present invention is further configured as follows: the telescopic rod includes a sleeve fixed to the left end of the top of the heat sink, a movable rod is slidably arranged in the sleeve and penetrates the sliding filter plate, a handle is arranged at the upper end of the movable rod, a connecting ring is fixedly installed on the outer wall, and the outer sleeve of the movable rod is provided with a telescopic spring with two ends respectively abutting the sleeve and the connecting ring.

[0010] By adopting the above technical solution, the movable rod is pulled up by holding the handle, and the connecting ring squeezes the telescopic spring so that the bottom of the movable rod can be separated from the sliding filter plate, so that the sliding filter plate can slide left and right.

[0011] The present invention is further configured as follows: a limiting ring for the connecting ring to pass through is fixedly mounted on the inner wall of the sleeve, two blocking posts are arranged on the side wall of the connecting ring, and four bayonet holes for the blocking posts to pass through are arranged on the circumference of the limiting ring.

[0012] By adopting the above technical solution, after pulling the movable rod to the upper end, it is rotated at a certain angle so that the blocking column and the bayonet are misaligned. The blocking column is located at the upper end of the limit ring and is supported, so that the staff can loosen the restriction on the handle and it is more convenient to replace the filter cotton.

[0013] The present invention is further configured as follows: a hole for pulling out the sliding filter plate is provided on the right wall of the heat dissipation box, and a handle is provided on the right end of the sliding filter plate.

[0014] By adopting the above technical solution, after the sliding filter plate is unrestricted, the handle can be held so that the filter plate can be pulled out through the opening, thereby facilitating the replacement of the filter cotton.

[0015] The present invention is further configured as follows: the protective mechanism includes a winding shaft rotatably arranged at one end of the top of the heat sink, a curtain is wound on the winding shaft, and coil springs are arranged at both ends, the end of the curtain is provided with a sliding bar whose two ends are slidably connected to the inner wall of the heat sink, an L-shaped push frame is arranged on the sliding bar, and a positioning piece for fixing the L-shaped push frame is installed at the other end of the top of the heat sink.

[0016] By adopting the above technical solution, when the motor is not working, the staff holds the L-shaped push frame and pushes it to one side to make the winding roller unwind the curtain, and the curtain can cover the upper port of the heat sink. Then the L-shaped push frame is fixed by the positioning piece, thereby preventing the inside of the heat sink from being contaminated by dust and debris. When it needs to be opened, it is only necessary to release the L-shaped push frame, and the coil spring under torsion is reset through the torque, so that the winding shaft rotates and the curtain is automatically rolled up, thereby opening the upper port of the heat sink.

[0017] The present invention is further configured as follows: the positioning member includes a fixed bin installed on one side of the top of the heat dissipation box, a plurality of return springs and a push plate connected to the tops of the plurality of return springs are equidistantly arranged in the fixed bin, two rectangular openings are arranged on the L-shaped push frame, two blocks that can pass through the rectangular openings are installed on the upper end of the push plate, and blocks extending to the outside of the fixed bin are installed at both ends.

[0018] By adopting the above technical solution, when the L-shaped push frame buckle is placed on the surface of the fixed bin, the push plate is pushed down under the elastic force of the reset spring, so that the card block is inserted into the L-shaped push frame, thereby realizing the limitation of the L-shaped push frame. The setting of the side block makes the lifting and lowering of the push plate more stable and reliable.

[0019] The present invention is further configured as follows: the protective mechanism also includes a baffle plate arranged at the air outlet and a linkage component for pushing the baffle plate to rise and fall, the linkage component includes a vertical rod and a one-way screw rod arranged on the front of the motor body and respectively located on the left and right sides of the air outlet, the one-way screw rod is linked through a winding shaft, and the baffle plate is provided with two movable blocks threadedly connected to the one-way screw rod and slidably connected to the vertical rod on one side close to the motor body.

[0020] By adopting the above technical solution, when the winding shaft rotates to close the opening at the upper end of the heat sink, the one-way screw rod below is also driven to rotate at the same time. Through the cooperation of the vertical rod and the moving block, the baffle is controlled to move downward at the same time, so that the opening at the upper end of the heat sink is closed and the air outlet is also blocked.

[0021] The present invention is further configured as follows: the winding shaft is provided with a main bevel gear at one end close to the baffle, a driven rod is provided on the front side of the heat dissipation box for rotation, a driven bevel gear meshing with the main bevel gear is installed on the upper end of the driven rod, and a belt assembly connected with the one-way screw is provided at the lower end.

[0022] By adopting the above technical solution, when the reel reels up the curtain, the main bevel gear at the end also rotates, pushing the slave bevel gear to rotate, causing the driven rod to rotate, and the belt assembly can drive the one-way screw rod to rotate, thereby achieving the purpose of blocking the air outlet at the same time.

[0023] The present invention is further configured as follows: the belt assembly comprises synchronous wheels respectively mounted on the one-way screw rod and one end of the driven rod, and a synchronous belt is arranged between the two synchronous wheels.

[0024] By adopting the above technical solution, the rotation of the driven rod drives one synchronous wheel to rotate, and with the cooperation of the synchronous belt, pulls the other synchronous wheel to rotate, so that the one-way screw rod rotates accordingly.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention extracts and cools the cold water in the cold water tank through the water cooling module, and sends it to the cold water circulation pipe in the heat dissipation box, and then blows air into the heat dissipation box through the axial flow fan. When the airflow passes through the air filter component, the dust impurities in the airflow can be filtered, and then the airflow passes through the cold water circulation pipe for cooling treatment to form cold wind, and then the cold wind is continuously blown into the motor body through the output end of the axial flow fan, so that the hot air in the motor body is discharged through the air outlet, and the internal dust is taken away at the same time. The cold water circulation pipe and the heat sink can also cool the surface of the motor body, thereby greatly improving the heat dissipation effect of the motor, making the working environment of the motor safer and more stable.

[0027] 2. The present invention pulls up the movable rod by holding the handle, and the connecting ring squeezes the telescopic spring so that the bottom of the movable rod can be separated from the sliding filter plate. After the sliding filter plate is not restricted, the handle is held to allow the sliding filter plate to be quickly and stably pulled out, so that the staff can easily take out the filter cotton placed on the upper end of the fixed filter plate, and then reset and fix the sliding filter plate, thereby facilitating and quickly replacing the filter cotton and improving the convenience of using the device.

[0028] 3. In the present invention, when the motor is not working, the staff holds the L-shaped push frame and pushes it to one side, so that the winding roller unwinds the curtain, and the curtain can cover the upper port of the heat sink. Then, the L-shaped push frame is fixed by the positioning piece, thereby preventing the inside of the heat sink from being polluted by dust and debris. When it needs to be opened, it only needs to release the L-shaped push frame, and the coil spring under torsion is reset by the torque, so that the winding shaft rotates, and the curtain is automatically rolled up, thereby opening the upper port of the heat sink.

[0029] 4. In the present invention, when the winding shaft rotates to close the upper opening of the heat sink, the one-way screw rod below is also driven to rotate at the same time. Through the cooperation of the vertical rod and the moving block, the baffle is controlled to move downward at the same time, so that the upper opening of the heat sink is closed and the air outlet is also blocked, preventing external dust and impurities from entering the motor when the motor is not working, thereby improving the protection effect of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0031] Figure 1 It is an overall structural diagram of a DC motor filtering and heat dissipation device of the present invention.

[0032] Figure 2 The present invention Figure 1 The overall structure diagram of the heat absorbing component.

[0033] Figure 3 The present invention Figure 2 Diagram of the internal structure of the heat sink.

[0034] Figure 4 The present invention Figure 3 Installation structure diagram of the sliding filter plate.

[0035] Figure 5 The present invention Figure 4 The overall structure diagram of the telescopic rod.

[0036] Figure 6 The present invention Figure 1 The overall structure diagram of the central protection mechanism.

[0037] Figure 7 The present invention Figure 3 The overall structure diagram of the positioning parts.

[0038] In the figure, 1, motor body; 2, axial flow fan; 3, heat sink; 4, air outlet; 5, air filter component; 51, fixed filter plate; 52, sliding filter plate; 53, filter cotton; 54, sleeve; 55, movable rod; 56, handle; 57, connecting ring; 58, telescopic spring; 59, limit ring; 510, stop column; 511, handle; 512, guide rod; 513, guide block; 6, heat absorption component; 61, cold water tank; 62, water cooling module ; 63. Cold water circulation pipe; 64. Heat sink; 7. Protection mechanism; 71. Winding shaft; 72. Curtain; 73. Coil spring; 74. Slide bar; 75. L-shaped push rack; 76. Fixed bin; 77. Reset spring; 78. Push plate; 79. Block; 710. Block; 711. Baffle; 712. Vertical rod; 713. One-way screw; 714. Moving block; 715. Main bevel gear; 716. Driven rod; 717. Slave bevel gear; 718. Synchronous belt. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, a DC motor filtering and heat dissipation device comprises a motor body 1, an axial flow fan 2 and a heat sink 3 are arranged on the top of the motor body 1, an air outlet 4 is arranged on the front, the air inlet end of the axial flow fan 2 is connected to the right side of the heat sink 3, and the air outlet end is connected to the top of the motor body 1, an air filter component 5 and a heat absorption component 6 are arranged in the heat sink 3, and the heat absorption component 6 comprises a cold water tank 61, a water cooling module 62, a cold water circulation pipe 63 and a plurality of heat sinks 64, the cold water tank 61 is separately arranged outside the motor body 1, the cold water circulation pipe 63 is installed in the inner cavity of the heat sink 3, the water cooling module 62 is installed at the upper end of the cold water tank 61, and the two ends are connected to the cold water tank 61 and the cold water circulation pipe 63 by water pipes respectively, a plurality of the heat sinks 64 are equidistantly arranged at the bottom of the inner cavity of the heat sink 3, and the upper end of the heat sink 64 is in contact with the cold water circulation pipe 63, and the lower end is in contact with the top wall of the motor body 1, and a protective mechanism 7 is arranged at the opening of the heat sink 3 and the air outlet 4.

[0041] The water cooling module 62 extracts and cools the cold water in the cold water tank 61 and sends it to the cold water circulation pipe 63 in the heat sink 3. Then, the air is blown into the heat sink 3 through the axial flow fan 2. When the airflow passes through the air filter component 5, the dust impurities in the airflow can be filtered. Then, the airflow passes through the cold water circulation pipe 63 for cooling to form cold air. The cold air is then continuously blown into the motor body 1 through the output end of the axial flow fan 2, so that the hot air in the motor body 1 is discharged through the air outlet 4, and the internal dust is also taken away. The cold water circulation pipe 63 and the heat sink 64 can also cool the surface of the motor body 1, thereby greatly improving the heat dissipation effect of the motor, making the working environment of the motor safer and more stable.

[0042] like Figure 3 , Figure 4 , Figure 5 As shown, the air filter component 5 includes a fixed filter plate 51 and a sliding filter plate 52 installed in the inner cavity of the heat sink 3, and a filter cotton 53 is arranged between the fixed filter plate 51 and the sliding filter plate 52. Two telescopic plug rods symmetrically arranged front and back are arranged on the left side of the top of the heat sink 3. The telescopic plug rods fix the sliding filter plate 52 to the inner cavity of the heat sink 3. The inner cavity of the heat sink 3 is also provided with guide rods 512 located on both sides of the top of the sliding filter plate 52. One side of the top of the sliding filter plate 52 is provided with a guide block 513 respectively slidably adapted with the two guide rods 11. The telescopic plug rod includes a sleeve 54 fixed to the left end of the top of the heat sink 3. The sleeve 54 A movable rod 55 is provided internally and slides through the sliding filter plate 52. A handle 56 is provided at the upper end of the movable rod 55. A connecting ring 57 is fixedly installed on the outer wall. The outer sleeve of the movable rod 55 is provided with a telescopic spring 58 whose two ends respectively abut against the sleeve 54 and the connecting ring 57. A limiting ring 59 for the connecting ring 57 to pass through is fixedly installed on the inner wall of the sleeve 54. Two blocking columns 510 are provided on the side wall of the connecting ring 57. Four bayonet holes for the blocking columns 510 to pass through are provided on the circumference of the limiting ring 59. An opening for pulling out the sliding filter plate 52 is provided on the right wall of the heat dissipation box 3. A handle 511 is provided at the right end of the sliding filter plate 52.

[0043] When the airflow passes through the filter cotton 53, dust impurities can be filtered and dried, so that the airflow to be blown into the motor body 1 is cleaner and drier, thereby preventing the motor from being damaged. The filter cotton 53 needs to be replaced regularly. When replacing, first pull out the telescopic rods on both sides to no longer restrict the sliding filter plate 52. Under the sliding cooperation of the guide block 513 and the guide rod 512, the sliding filter plate 52 can be quickly and stably pulled out, so that the staff can easily take out the filter cotton 53 placed on the upper end of the fixed filter plate 51, and then reset and fix the sliding filter plate 52, so as to quickly and conveniently realize the replacement of the filter cotton 53. To improve the convenience of using the device, hold the handle 56 to pull up the movable rod 55, and the connecting ring 57 squeezes the telescopic spring 58 so that the bottom of the movable rod 55 can be separated from the sliding filter plate 52, so that the sliding filter plate 52 can slide left and right. After pulling the movable rod 55 to the upper end, rotate it a certain angle to misalign the blocking column 510 with the bayonet. The blocking column 510 is located at the upper end of the limiting ring 59 and is supported, so that the staff can loosen the restriction on the handle 56, which makes it more convenient to replace the filter cotton 53. After the sliding filter plate 52 is not restricted, hold the handle 511 so that it can be pulled out through the opening.

[0044] like Figure 6 , Figure 7 As shown, the protective mechanism 7 includes a winding shaft 71 rotatably arranged at one end of the top of the heat sink 3, a curtain 72 is wound on the winding shaft 71, and coil springs 73 are arranged at both ends, the end of the curtain 72 is provided with a slide bar 74 that is slidably connected to the inner wall of the heat sink 3 at both ends, and an L-shaped push frame 75 is arranged on the slide bar 74, and a positioning member for fixing the L-shaped push frame 75 is installed at the other end of the top of the heat sink 3, and the positioning member includes a fixed bin 76 installed on one side of the top of the heat sink 3, a plurality of return springs 77 and a push plate 78 connected to the top of the plurality of return springs 77 are equidistantly arranged in the fixed bin 76, and two rectangular openings are arranged on the L-shaped push frame 75, and two blocks 79 that can penetrate the rectangular openings are installed on the upper end of the push plate 78, and blocks 710 extending to the outside of the fixed bin 76 are installed at both ends.

[0045] When the motor is not working, the staff holds the L-shaped push frame 75 and pushes it to one side, so that the winding roller 71 unwinds the curtain 72, and the curtain 72 can cover the upper port of the heat sink 3. Then, the L-shaped push frame 75 is fixed by the positioning piece, thereby preventing the inside of the heat sink 3 from being contaminated by dust and debris. When it needs to be opened, it is only necessary to release the L-shaped push frame 75, and the coil spring 73 in torsion is reset through the torsion, so that the winding shaft 71 rotates and the curtain 72 is automatically rewound, thereby opening the upper port of the heat sink 3. When the L-shaped push frame 75 is buckled on the surface of the fixed bin 76, the push plate 78 is pushed up under the elastic force of the reset spring 77, so that the card block 79 is inserted into the L-shaped push frame 75, thereby realizing the limitation of the L-shaped push frame 75. The setting of the side block 710 makes the lifting and lowering of the push plate 78 more stable and reliable.

[0046] like Figure 6 As shown, the protection mechanism 7 also includes a baffle 711 arranged at the air outlet 4 and a linkage component that pushes the baffle 711 to rise and fall. The linkage component includes a vertical rod 712 and a one-way screw rod 713 arranged on the front of the motor body 1 and respectively located on the left and right sides of the air outlet 4. The one-way screw rod 713 is linked by the winding shaft 71. The baffle 711 is provided with two movable parts that are threadedly connected to the one-way screw rod 713 and slidably connected to the vertical rod 712 on one side close to the motor body 1. Block 714, the winding shaft 71 is provided with a main bevel gear 715 at one end close to the baffle 711, the front rotation of the heat sink 3 is provided with a driven rod 716, the upper end of the driven rod 716 is provided with a driven bevel gear 717 meshing with the main bevel gear 715, and the lower end is provided with a belt assembly connected with the one-way screw rod 713, the belt assembly includes synchronous wheels respectively installed on one end of the one-way screw rod 713 and the driven rod 716, and a synchronous belt 718 is provided between the two synchronous wheels.

[0047] When the winding shaft 71 rotates to close the upper opening of the heat sink 3, the one-way screw rod 713 below is also driven to rotate at the same time. Through the cooperation of the vertical rod 712 and the moving block 714, the baffle plate 711 is controlled to move downward at the same time, so that the upper opening of the heat sink 3 is closed and the air outlet 4 is also blocked. When the winding shaft 71 rolls up the baffle curtain 72, the main bevel gear 715 at the end also rotates, pushing the slave bevel gear 717 to rotate, so that the driven rod 716 rotates. The one-way screw rod 713 can be driven to rotate by the belt assembly to achieve the purpose of blocking the air outlet 4 at the same time. The rotation of the driven rod 716 drives a synchronous wheel to rotate, and pulls another synchronous wheel to rotate with the cooperation of the synchronous belt 718, so that the one-way screw rod 713 rotates accordingly.

Claims

1. A DC motor filtering and heat dissipation device, comprising a motor body (1), characterized in that: An axial flow fan (2) and a heat sink (3) are arranged on the top of the motor body (1), and an air outlet (4) is arranged on the front. The air inlet end of the axial flow fan (2) is connected to the right side of the heat sink (3), and the air outlet end is connected to the top of the motor body (1). An air filter component (5) and a heat absorption component (6) are arranged in the heat sink (3). The heat absorption component (6) includes a cold water tank (61), a water cooling module (62), a cold water circulation pipe (63) and a plurality of heat sinks (64). The cold water tank (61) is separately arranged on the motor body ( 1) outside, the cold water circulation pipe (63) is installed in the inner cavity of the heat sink (3), the water cooling module (62) is installed at the upper end of the cold water tank (61), and the two ends are respectively connected to the cold water tank (61) and the cold water circulation pipe (63) through water pipes, a plurality of heat sinks (64) are equidistantly arranged at the bottom of the inner cavity of the heat sink (3), and the upper ends of the heat sinks (64) are in contact with the cold water circulation pipe (63), and the lower ends are in contact with the top wall of the motor body (1), and a protective mechanism (7) is arranged at the opening of the heat sink (3) and the air outlet (4) The air filter component (5) comprises a fixed filter plate (51) and a sliding filter plate (52) installed in the inner cavity of the heat sink (3), a filter cotton (53) is arranged between the fixed filter plate (51) and the sliding filter plate (52), two telescopic plug rods symmetrically arranged in front and back are arranged on the left side of the top of the heat sink (3), the telescopic plug rods fix the sliding filter plate (52) in the inner cavity of the heat sink (3), the inner cavity of the heat sink (3) is also provided with guide rods (512) located on both sides of the top of the sliding filter plate (52), the sliding filter plate (52) ) is provided with a guide block (513) slidably matched with two guide rods (11) on one side of the top, the telescopic rod comprises a sleeve (54) fixed to the left end of the top of the heat sink (3), a movable rod (55) penetrating the sliding filter plate (52) is slidably provided in the sleeve (54), a handle (56) is provided at the upper end of the movable rod (55), a connecting ring (57) is fixedly installed on the outer wall, and a telescopic spring (58) is sleeved on the outside of the movable rod (55) with two ends respectively abutting against the sleeve (54) and the connecting ring (57).

2. A DC motor filtering and heat dissipation device according to claim 1, characterized in that: A limiting ring (59) for the connecting ring (57) to pass through is fixedly mounted on the inner wall of the sleeve (54); two blocking posts (510) are arranged on the side wall of the connecting ring (57); and four bayonet holes for the blocking posts (510) to pass through are arranged on the circumference of the limiting ring (59).

3. A DC motor filtering and heat dissipation device according to claim 2, characterized in that: The right wall of the heat dissipation box (3) is provided with an opening for pulling out the sliding filter plate (52), and the right end of the sliding filter plate (52) is provided with a handle (511).

4. A DC motor filtering and heat dissipation device according to claim 1, characterized in that: The protection mechanism (7) comprises a reel (71) rotatably arranged at one end of the top of the heat sink (3), a curtain (72) being wound on the reel (71), both ends of which are provided with coil springs (73), the ends of the curtain (72) are provided with slide bars (74) whose two ends are slidably connected to the inner wall of the heat sink (3), an L-shaped push frame (75) is arranged on the slide bar (74), and a positioning member for fixing the L-shaped push frame (75) is installed at the other end of the top of the heat sink (3).

5. A DC motor filtering and heat dissipation device according to claim 4, characterized in that: The positioning member comprises a fixed bin (76) installed on one side of the top of the heat sink (3), a plurality of return springs (77) and a push plate (78) connected to the tops of the plurality of return springs (77) are arranged equidistantly in the fixed bin (76), two rectangular openings are arranged on the L-shaped push frame (75), two blocks (79) that can pass through the rectangular openings are installed on the upper end of the push plate (78), and blocks (710) extending to the outside of the fixed bin (76) are installed at both ends.

6. A DC motor filtering and heat dissipation device according to claim 4, characterized in that: The protection mechanism (7) further comprises a baffle (711) arranged at the air outlet (4) and a linkage component for pushing the baffle (711) to rise and fall, the linkage component comprising a vertical rod (712) and a one-way screw rod (713) arranged at the front of the motor body (1) and respectively located on the left and right sides of the air outlet (4), the one-way screw rod (713) being linked via the winding shaft (71), and the baffle (711) is provided with two moving blocks (714) threadedly connected to the one-way screw rod (713) and slidably connected to the vertical rod (712) on one side close to the motor body (1).

7. A DC motor filtering and heat dissipation device according to claim 6, characterized in that: The winding shaft (71) is provided with a main bevel gear (715) at one end close to the baffle (711), and a driven rod (716) is rotatably provided at the front of the heat dissipation box (3). The upper end of the driven rod (716) is provided with a driven bevel gear (717) meshing with the main bevel gear (715), and the lower end is provided with a belt assembly connected to the one-way screw rod (713).

8. A DC motor filtering and heat dissipation device according to claim 7, characterized in that: The belt assembly comprises synchronous wheels respectively mounted on one end of the one-way screw rod (713) and the driven rod (716), and a synchronous belt (718) is arranged between the two synchronous wheels.

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