Anti-electromagnetic interference brushless direct current motor

Abstract

The utility model discloses an anti-electromagnetic interference brushless direct current motor, which relates to the technical field of brushless direct current motors, and comprises a direct current motor main body, an isolation cylinder is clamped on the surface of the direct current motor main body, a heat dissipation cavity is arranged in the isolation cylinder, and the upper surface of the isolation cylinder is fixedly connected with a water inlet pipe. A sealing plug is in threaded connection with the interior of the water inlet pipe, a mounting plate is fixedly connected to one side of the isolation cylinder through bolts, a heat dissipation groove is formed in the surface of the mounting plate, a mounting groove is formed in the other side of the isolation cylinder, a heat dissipation mechanism is mounted in the mounting groove, and an elastic block is mounted on the surface of the heat dissipation mechanism. According to the utility model, through the arrangement of the isolation cylinder, the heat dissipation cavity, the plugging block, the heat dissipation mechanism, the fixing plate and other structures, heat generated by the direct current motor main body is absorbed through cooling water in the heat dissipation cavity when the direct current motor main body is used, and the effect of rapid heat dissipation is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of brushless DC motors, and particularly relates to a brushless DC motor with electromagnetic interference resistance. Background Technique

[0002] A brushless DC motor consists of a motor main body and a driver, and is a typical mechatronic product. A brushless motor refers to a motor without a carbon brush and a commutator (or slip ring), also known as a non-commutator motor. As early as when the motor was born in the 19th century, the practical motor produced was in a brushless form, that is, an AC squirrel-cage asynchronous motor. This kind of motor has been widely used. However, the asynchronous motor has many insurmountable defects, resulting in slow development of motor technology. In the middle of the last century, transistors were born, so a DC brushless motor using a transistor commutation circuit instead of a carbon brush and a commutator came into being.

[0003] After retrieval, Chinese Patent No. CN216699692U discloses an outer-rotor brushless DC motor, which includes a shaft core, a stator, a bearing assembly for reducing the rotational friction between the shaft core and the stator, a bearing seat, a housing for accommodating the stator, a magnetic ring and an eccentric wheel. A limiting protrusion is provided at the end of the shaft core. The stator is sleeved on the shaft core. The bearing assembly is arranged on the outer side of the shaft core. The bearing seat is arranged between the stator and the shaft core. The housing is sleeved on the outer side of the stator. The magnetic ring is arranged between the housing and the stator. The eccentric wheel is connected to the end of the shaft core, and a limiting groove is provided on the side of the eccentric wheel close to the shaft core. The utility model greatly simplifies the structure of the installation and fixing part, and reduces the noise and vibration generated by the bearing assembly due to misalignment during assembly by setting a rubber sleeve, a bearing seat and a three-wave washer, thereby improving the running stability of the motor, and can also greatly reduce the machining precision of the installation support of the outer-rotor brushless DC motor of the utility model.

[0004] However, the above patent has the following problems:

[0005] Although it greatly simplifies the structure of the installation and fixing part and improves the running stability of the motor, when the brushless DC motor is in use, it is impossible to quickly dissipate heat from the brushless DC motor, which may cause the brushless DC motor to stop running due to excessive temperature during use, affecting the normal use of the brushless DC motor. Therefore, a brushless DC motor with electromagnetic interference resistance is proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a brushless DC motor with electromagnetic interference resistance, which solves the problem that the existing brushless DC motor with electromagnetic interference resistance cannot quickly dissipate heat during use, which may cause the brushless DC motor to stop running due to excessive temperature during use, affecting the normal use of the brushless DC motor.

[0007] To solve the above technical problems, the present utility model is realized through the following technical solutions:

[0008] The present utility model relates to a brushless DC motor resistant to electromagnetic interference, including a DC motor main body. An isolation cylinder is clamped and installed on the surface of the DC motor main body. A heat dissipation cavity is provided inside the isolation cylinder. A water inlet pipe is fixedly connected to the upper surface of the isolation cylinder. A sealing plug is threadedly connected inside the water inlet pipe. One side of the isolation cylinder is fixedly connected with a mounting plate through bolts. Heat dissipation grooves are provided on the surface of the mounting plate. An installation groove is provided on the other side of the isolation cylinder. A heat dissipation mechanism is installed inside the installation groove. Elastic blocks are installed on the surface of the heat dissipation mechanism. One end of the elastic block is fixedly connected with a plug-in block. Plug-in grooves corresponding to the plug-in blocks are provided on both sides of the surface of the DC motor main body. The plug-in block is clamped with the DC motor main body through the plug-in groove.

[0009] Further, the heat dissipation mechanism includes four fixing rods fixedly connected inside the installation groove. A rotating ring is slidably connected to the opposite sides of the four fixing rods. The number of the plug-in blocks and the elastic blocks is two each. The two elastic blocks are fixedly connected inside the rotating ring. The plug-in block is slidably connected with the rotating ring.

[0010] Further, linkage plates are fixedly connected to the surface of the rotating ring in an annular array. Stable grooves corresponding to the fixing rods are provided on both sides of the surface of the rotating ring. Fixing plates are fixedly connected to both sides of the surface of the isolation cylinder. Installation bolts are threadedly connected to both sides of the surface of the fixing plate.

[0011] Further, a linkage ring is rotatably connected inside the installation groove. Push plates are fixedly connected to the inner arc surface of the linkage ring in an annular array. A plurality of the push plates correspond to a plurality of the linkage plates one by one.

[0012] Further, the outer arc surface of the linkage ring penetrates through the isolation cylinder and is rotatably connected inside the heat dissipation cavity. Connecting rods are fixedly connected to both sides of the outer arc surface of the linkage ring. Installation rods are fixedly connected to one end of each of the two connecting rods. A sealing plate is fixedly connected to the surface of the installation rod. The sealing plate corresponds to the heat dissipation cavity.

[0013] Further, sliding grooves are provided on both sides of the surface of the linkage ring. Sealing covers are slidably connected inside the two sliding grooves. The two sealing covers are fixedly connected inside the heat dissipation cavity.

[0014] Further, the output end of the DC motor main body is rotatably connected inside the installation groove. The output end of the DC motor main body is clamped with the rotating ring through the plug-in block. The water inlet pipe is communicated with the heat dissipation cavity. Cooling water is provided inside the heat dissipation cavity.

[0015] The utility model has the following beneficial effects:

[0016] Through the settings of structures such as an isolation cylinder, a heat dissipation cavity, a mounting plate, a mounting groove, a plug-in block, a heat dissipation mechanism, and a fixing plate, the isolation of the brushless DC motor is realized through the isolation cylinder, reducing the magnetic coupling between the DC motor and other electronic devices, thereby improving the anti-electromagnetic interference ability of the brushless DC motor. The heat generated by the DC motor main body is absorbed by the cooling water inside the heat dissipation cavity, achieving the effect of rapid heat dissipation. And half of the cooling water is injected into the heat dissipation cavity. When the DC motor main body is in use, its output end rotates, driving the rotating ring to rotate, causing the linkage ring to rotate, and then causing the connecting rod to rotate, driving the sealing plate to rotate inside the heat dissipation cavity, so that while the cooling water absorbs the heat of the DC motor main body, it rotates synchronously, driving the cooling water to absorb heat from different positions of the DC motor main body, so that the device can not only quickly dissipate heat from the DC motor main body, but also save cooling water, solving the problem in the prior art that the brushless DC motor cannot be quickly dissipated heat, which may cause the brushless DC motor to stop running due to excessive temperature during use, affecting the normal use of the brushless DC motor.

[0017] Of course, it is not necessary for any product implementing the present utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative efforts.

[0019] Figure 1 is a structural schematic diagram of the present utility model;

[0020] Figure 2 is a second perspective structural schematic diagram of the present utility model;

[0021] Figure 3 is a partial sectional split structural schematic diagram of the present utility model;

[0022] Figure 4 is a structural schematic diagram of the positional relationship between the isolation cylinder and the sealing plate of the present utility model;

[0023] Figure 5 is a split structural schematic diagram of the DC motor main body and the linkage ring of the present utility model;

[0024] Figure 6 of the present utility model Figure 5Schematic diagram of the enlarged structure at position A in [Chinese entity].

[0025] In the attached drawings, the list of components represented by each label is as follows:

[0026] 1. DC motor main body; 2. Isolation cylinder; 3. Heat dissipation cavity; 4. Water inlet pipe; 5. Mounting plate; 6. Mounting groove; 7. Elastic block; 8. Insertion block; 9. Fixed rod; 10. Rotating ring; 11. Linkage plate; 12. Fixed plate; 13. Linkage ring; 14. Pushing plate; 15. Connecting rod; 16. Mounting rod; 17. Sealing plate; 18. Sliding groove; 19. Sealing cover. Detailed implementation manners

[0027] Here, the exemplary embodiments will be described in detail, and the examples are shown in the attached drawings. When the following description refers to the attached drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. On the contrary, they are only examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-6As shown in the figure, the utility model relates to a brushless DC motor with anti-electromagnetic interference, which includes a DC motor main body 1. An isolation cylinder 2 is clamped and installed on the surface of the DC motor main body 1. Through the setting of the isolation cylinder 2, the DC motor main body 1 is isolated, reducing the magnetic coupling between the DC motor main body 1 and other electronic devices, thereby improving the anti-electromagnetic interference ability of the DC motor main body 1. Both sides of the surface of the isolation cylinder 2 are fixedly connected with fixing plates 12. Installation bolts are threadedly connected to both sides of the surface of the fixing plates 12, which facilitates the installation of the DC motor main body 1. A heat dissipation cavity 3 is opened inside the isolation cylinder 2. A water inlet pipe 4 is fixedly connected to the upper surface of the isolation cylinder 2, and the water inlet pipe 4 is communicated with the heat dissipation cavity 3. Cooling water is provided inside the heat dissipation cavity 3. A sealing plug is threadedly connected inside the water inlet pipe 4. Before the DC motor main body 1 is used, cooling water reaching half of the capacity of the heat dissipation cavity 3 is injected into the inside of the heat dissipation cavity 3 through the water inlet pipe 4, thereby absorbing the heat generated during the use of the DC motor main body 1. One side of the isolation cylinder 2 is fixedly connected with a mounting plate 5 through bolts. Heat dissipation grooves are opened on the surface of the mounting plate 5. An installation groove 6 is opened on the other side of the isolation cylinder 2. The output end of the DC motor main body 1 is rotatably connected to the inside of the installation groove 6. A heat dissipation mechanism is installed inside the installation groove 6. An elastic block 7 is installed on the surface of the heat dissipation mechanism. One end of the elastic block 7 is fixedly connected with a plug-in block 8. Plug-in grooves corresponding to the plug-in block 8 are opened on both sides of the surface of the DC motor main body 1. The plug-in block 8 is clamped with the DC motor main body 1 through the plug-in groove. The heat dissipation mechanism includes four fixing rods 9 fixedly connected to the inside of the installation groove 6. A rotating ring 10 is slidably connected to the opposite sides of the four fixing rods 9;

[0030] The number of the insertion blocks 8 and the elastic blocks 7 is two. The two elastic blocks 7 are fixedly connected to the inside of the rotating ring 10. The insertion block 8 is slidably connected to the rotating ring 10. The output end of the DC motor main body 1 is clamped with the rotating ring 10 through the insertion block 8. The surface of the rotating ring 10 is fixedly connected with linkage plates 11 in an annular array. A linkage ring 13 is rotatably connected to the inside of the installation groove 6. The inner arc surface of the linkage ring 13 is fixedly connected with push plates 14 in an annular array. A number of the push plates 14 correspond to a number of the linkage plates 11 one by one. During the use of the DC motor main body 1, its output end rotates synchronously. Thus, through the mutual cooperation of the insertion block 8 and the insertion slot, the rotating ring 10 rotates inside the installation groove 6, so that the linkage plates 11 rotate synchronously, thereby driving the corresponding push plates 14 to move. The outer arc surface of the linkage ring 13 penetrates through the isolation cylinder 2 and is rotatably connected to the inside of the heat dissipation cavity 3. Both sides of the outer arc surface of the linkage ring 13 are fixedly connected with connecting rods 15. One end of each of the two connecting rods 15 is fixedly connected with a mounting rod 16. The surface of the mounting rod 16 is fixedly connected with a sealing plate 17. When the push plate 14 moves, the linkage ring 13 rotates inside the installation groove 6 and the heat dissipation cavity 3, so that the connecting rods 15 rotate synchronously, and the mounting rod 16 drives the sealing plate 17 to rotate inside the heat dissipation cavity 3. The sealing plate 17 corresponds to the heat dissipation cavity 3. When the sealing plate 17 rotates, the sealing plate 17 drives the cooling water to move synchronously, so that the cooling water continuously slides on the inner wall of the heat dissipation cavity 3. Thus, the cooling water dissipates heat from different positions of the DC motor main body 1. This not only reduces the use of the cooling water and saves resources, but also quickly dissipates heat from the DC motor main body 1 through the sliding of the cooling water inside the heat dissipation cavity 3. Both sides of the surface of the linkage ring 13 are provided with sliding grooves 18. Sealing covers 19 are slidably connected to the inside of the two sliding grooves 18. The two sealing covers 19 are fixedly connected to the inside of the heat dissipation cavity 3. Stable grooves corresponding to the fixing rods 9 are provided on both sides of the surface of the rotating ring 10. Through the mutual cooperation of the sealing covers 19 and the sliding grooves 18, the leakage of the cooling water through the installation groove 6 and the linkage ring 13 is avoided.

[0031] Specifically, when the brushless DC motor with anti-electromagnetic interference is in use: before the DC motor main body 1 is used, cooling water reaching half of the capacity of the heat dissipation cavity 3 is injected into the interior of the heat dissipation cavity 3 through the water inlet pipe 4, so as to absorb the heat generated during the use of the DC motor main body 1. During the use of the DC motor main body 1, its output end rotates synchronously. Thus, through the mutual cooperation of the plug-in block 8 and the plug-in slot, the rotating ring 10 rotates inside the installation slot 6, causing the linkage plate 11 to rotate synchronously, thereby driving the corresponding push plate 14 to move, making the linkage ring 13 rotate inside the installation slot 6 and the heat dissipation cavity 3, so that the connecting rod 15 rotates synchronously, causing the installation rod 16 to drive the sealing plate 17 to rotate inside the heat dissipation cavity 3, so that the sealing plate 17 drives the cooling water to move synchronously, making the cooling water continuously slide on the inner wall of the heat dissipation cavity 3, so that the cooling water dissipates heat from different positions of the DC motor main body 1. This not only reduces the use of cooling water and saves resources, but also quickly dissipates heat from the DC motor main body 1 through the sliding of the cooling water inside the heat dissipation cavity 3. Through the mutual cooperation of the sealing cover 19 and the sliding slot 18, the leakage of the cooling water through the installation slot 6 and the linkage ring 13 is avoided.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0033] After considering the specification and the practice disclosed herein, those skilled in the art will readily conceive of other embodiments of the present disclosure. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope of the present disclosure is pointed out by the following claims.

Claims

1. A brushless DC motor with electromagnetic interference resistance, characterized in that: The invention comprises a DC motor body (1), a surface of which is mounted an isolating cylinder (2) in a clamping manner, a heat dissipation cavity (3) being provided inside the isolating cylinder (2), a water inlet pipe (4) being fixedly connected to the upper surface of the isolating cylinder (2), a sealing plug being threadedly connected to the inside of the water inlet pipe (4), a mounting plate (5) being fixedly connected to one side of the isolating cylinder (2) by means of bolts, a heat dissipation groove being provided on the surface of the mounting plate (5), a mounting groove (6) being provided on the other side of the isolating cylinder (2), a heat dissipation mechanism being installed inside the mounting groove (6), a surface of the heat dissipation mechanism being mounted an elastic block (7), one end of the elastic block (7) being fixedly connected to a plug-in block (8), plug-in grooves corresponding to the plug-in block (8) being provided on both sides of the surface of the DC motor body (1), and the plug-in block (8) being clamped to the DC motor body (1) via the plug-in grooves.

2. The brushless DC motor with electromagnetic interference resistance according to claim 1, characterized in that: The heat dissipation mechanism comprises four fixing rods (9) fixedly connected to the inside of the mounting groove (6); opposite sides of the four fixing rods (9) are slidably connected to a rotating ring (10); the number of the plug-in blocks (8) and the number of the elastic blocks (7) are both two; the two elastic blocks (7) are fixedly connected to the inside of the rotating ring (10); and the plug-in blocks (8) are slidably connected to the rotating ring (10).

3. The brushless DC motor with electromagnetic interference resistance according to claim 2, characterized in that: The surface of the rotating ring (10) is fixedly connected to a linkage plate (11) in a ring array, and stabilizing grooves corresponding to the fixing rods (9) are provided on both sides of the surface of the rotating ring (10). The surface of the isolation cylinder (2) is fixedly connected to fixing plates (12) on both sides, and the surface of the fixing plates (12) is threadedly connected to mounting bolts on both sides.

4. The brushless DC motor with electromagnetic interference resistance according to claim 3, characterized in that: A linkage ring (13) is rotatably connected inside the installation groove (6), and an inner arc surface of the linkage ring (13) is fixedly connected to a push plate (14) in a ring array, and a plurality of the push plates (14) correspond one to one with a plurality of linkage plates (11).

5. The brushless DC motor with electromagnetic interference resistance according to claim 4, characterized in that: The outer arc surface of the linkage ring (13) passes through the isolation tube (2) and is rotatably connected to the inside of the heat dissipation cavity (3). Connecting rods (15) are fixedly connected to both sides of the outer arc surface of the linkage ring (13). One end of each of the two connecting rods (15) is fixedly connected to a mounting rod (16). A sealing plate (17) is fixedly connected to the surface of the mounting rod (16). The sealing plate (17) corresponds to the heat dissipation cavity (3).

6. The brushless DC motor with electromagnetic interference resistance according to claim 5, characterized in that: Sliding grooves (18) are provided on both sides of the surface of the linkage ring (13), and sealing covers (19) are slidably connected inside the two sliding grooves (18). The two sealing covers (19) are fixedly connected to the inside of the heat dissipation cavity (3).

7. The brushless DC motor with electromagnetic interference resistance according to claim 2, characterized in that: The output end of the DC motor body (1) is rotatably connected to the inside of the mounting groove (6), the output end of the DC motor body (1) is clamped with the rotating ring (10) via a plug-in block (8), the water inlet pipe (4) is connected to the heat dissipation cavity (3), and cooling water is provided inside the heat dissipation cavity (3).

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