Brushless motor with protection structure

Abstract

The utility model discloses a brushless motor with a protective structure, which belongs to the technical field of brushless motors and comprises a motor body, a rotating shaft, a protective shell and an end cover. The protective shell adopts an annular distribution buffer device, multidirectional vibration is absorbed through a first connecting plate, a sliding plate and a damping spring, and an anti-skid coating inhibits looseness of components. Supporting blocks are fixed to the front end, the rear end and the middle of the shell to form an annular air inlet which is matched with outer cooling fins to optimize an airflow path. The end cover is clamped with the first protrusion of the motor body and the second protrusion of the shell through the limiting groove, and sealing protection is achieved through the rubber ring. A detachable V-shaped filter plate is arranged in the filter screen structure, and the density of meshes is reduced from top to bottom in a gradient manner, so that graded filtration and self-cleaning of dust are realized. The coupling outside the rotating shaft drives the fan blades to exhaust air forcibly, and the heat dissipation efficiency is improved. The scheme integrates the functions of impact resistance, multi-stage dust prevention and efficient heat dissipation, is suitable for severe working conditions such as high dust and strong vibration, and remarkably prolongs the service life of the motor.

Description

Technical Field

[0001] This utility model belongs to the field of brushless motor technology, specifically relating to a brushless motor with a protective structure. Background Technology

[0002] Brushless motors are widely used in industrial equipment, new energy vehicles, and intelligent equipment due to their high efficiency and low noise. However, in complex working conditions such as construction machinery and outdoor operations, motors are exposed to high dust, strong vibration, and drastic temperature changes for extended periods, and traditional protective structures have significant shortcomings: First, conventional cylindrical shells have poor impact resistance and are easily damaged by external collisions; second, single-layer filter structures are easily clogged by dust, affecting heat dissipation efficiency and increasing maintenance costs due to frequent cleaning; third, heat dissipation systems rely on natural convection or a single fan, making it difficult to balance protective sealing with heat dissipation requirements; and fourth, traditional rigid connection structures cannot effectively absorb multi-directional vibrations, leading to accelerated bearing wear and shortened lifespan.

[0003] In existing technologies, such as using a split protective cover, the filter screen is fixedly connected to the outer shell, making it unsuitable for different dust environments; while spring dampers reduce vibration, they neglect the energy dispersion of radial impacts. Furthermore, most solutions fail to address the coordinated optimization of filter self-cleaning and heat dissipation paths, resulting in a trade-off between protective and heat dissipation performance.

[0004] Therefore, a new type of brushless motor structure is needed that combines efficient protection, dynamic vibration reduction, and intelligent heat dissipation to meet the reliability and long life requirements under harsh working conditions. Utility Model Content

[0005] The purpose of this invention is to provide a brushless motor with a protective structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a brushless motor with a protective structure, comprising a motor body and a rotating shaft. A protective shell is fixedly connected to the outer surface of the motor body through several annularly distributed buffer devices. The protective shell has a regular polygonal cross-section, and support blocks are fixedly connected to the front and rear ends and the middle of the outer side of the protective shell. An end cover is slidably connected to the outer surface of the rotating shaft. A slot is provided on the inner side of the end cover, and its edge extends to the other side of the end cover. A filter structure is provided in the slot. A fan blade structure is fixedly connected to the outer surface of the rotating shaft outside the end cover through a coupling. A shell is provided on the outer side of the fan blade structure.

[0007] It should be noted in the design that an annular air inlet is formed between the support blocks.

[0008] It is worth noting that the motor body and the protective shell are respectively provided with a first protrusion and a second protrusion on one side, and the end cover is provided with two sets of limiting grooves on one side. The limiting grooves are connected to the first protrusion or the second protrusion, and a rubber ring is installed between the limiting groove and the first protrusion or the second protrusion.

[0009] In one preferred embodiment, end caps are fixedly connected to the four corners of one side of the protective shell via fixing bolts and corresponding connection holes.

[0010] In a preferred embodiment, the filter structure has a mounting groove in the middle, and several sets of detachable V-shaped filter plates are installed in the mounting groove. Each filter plate has filter holes, and the mesh density of the filter holes decreases from top to bottom. The diameter of the upper mesh is 0.5-1mm, and the diameter of the lower mesh is 0.1-0.3mm. A dust guiding slope of 5°-15° is formed between the filter plate and the air inlet.

[0011] In a preferred embodiment, the buffer device includes a first connecting plate and a second connecting plate. The upper and lower ends of the second connecting plate are respectively fixedly connected to a support plate or a sliding plate. The two sides of the sliding plate are slidably connected to the middle of the first connecting plate. The sliding plate and the contact surface of the sliding plate are provided with an anti-slip coating. The lower end of the sliding plate is fixedly connected to the upper surface of the lower end of the first connecting plate by a shock-absorbing spring.

[0012] In a preferred embodiment, heat dissipation fins are fixedly connected to the outer surface of the protective shell between the support blocks.

[0013] Compared with the prior art, the brushless motor with a protective structure provided by this utility model has at least the following beneficial effects:

[0014] (1) This utility model combines a regular polygonal protective shell with a ring-shaped buffer device, that is, the sliding plate and anti-slip coating in the buffer device form a three-dimensional buffer space under the action of the shock-absorbing spring, which can absorb vibration energy in different directions.

[0015] (2) The support blocks and heat dissipation fins on the outer surface of the casing form a multi-directional heat dissipation channel. Combined with the gradient filtration design of the detachable V-shaped filter plate (the upper layer with 0.5-1mm mesh intercepts large particles of impurities, and the lower layer with 0.1-0.3mm mesh filters fine dust), it achieves four levels of dust protection while ensuring ventilation efficiency. The inclined dust guide slope and the detachable filter plate constitute a self-cleaning system, significantly reducing the maintenance frequency. In addition, the end cover and the outer casing form a double sealing structure through the limiting groove, protrusion and rubber ring. Combined with the composite buffer mechanism of shock-absorbing spring and sliding plate, the motor can still maintain excellent waterproof and dustproof performance under vibration conditions, which is especially suitable for harsh environments such as engineering machinery and outdoor equipment. Attached Figure Description

[0016] Figure 1 This is an exploded view of the front structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the end cap structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the filter structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the buffer device structure of this utility model.

[0020] In the diagram: 1. Motor body; 101. First protrusion; 2. Rotating shaft; 3. Buffer device; 301. First connecting plate; 302. Second connecting plate; 3021. Sliding plate; 3022. Support plate; 303. Shock-absorbing spring; 304. Anti-slip coating; 4. Protective shell; 401. Heat dissipation fins; 402. Support block; 403. Second protrusion; 404. Fixing bolt; 5. End cover; 501. Slot; 502. Limiting slot; 503. Connecting hole; 504. Rubber ring; 6. Filter structure; 601. Mounting slot; 602. Filter plate; 603. Filter hole; 7. Coupling; 8. Fan blade structure; 9. Shell. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Please see Figure 1-4 This utility model provides a brushless motor with a protective structure, including: a motor body 1 and a rotating shaft 2. A protective shell 4 is fixedly connected to the outer surface of the motor body 1 through several annularly distributed buffer devices 3. The protective shell 4 has a regular polygonal cross section, and support blocks 402 are fixedly connected to the front and rear ends and the middle of the outer side of the protective shell 4. An end cover 5 is slidably connected to the outer surface of the rotating shaft 2. A slot 501 is provided on the inner side of the end cover 5, and its edge extends through the other side of the end cover 5. A filter structure 6 is provided in the slot 501. A fan blade structure 8 is fixedly connected to the outer surface of the rotating shaft 2 outside the end cover 5 through a coupling 7. A shell 9 is provided on the outer side of the fan blade structure 8.

[0023] Further as Figure 1 As shown, it is worth noting that an annular air inlet is formed between the support blocks 402. The annular air inlet formed between the support blocks 402 expands the contact area of ​​the heat dissipation airflow, and works with the external fan blade structure 8 to accelerate air circulation and reduce the temperature rise of the motor.

[0024] Further as Figure 2As shown, it is worth noting that the motor body 1 and the protective housing 4 are respectively provided with a first protrusion 101 and a second protrusion 403 on one side, and the end cover 5 is provided with two sets of limiting grooves 502 on one side. The limiting grooves 502 are connected to the first protrusion 101 or the second protrusion 403, and rubber rings 504 are installed between the limiting grooves 502 and the first protrusion 101 or the second protrusion 403. Through the snap-fit ​​design of the first protrusion 101, the second protrusion 403 and the limiting grooves 502, and with the rubber rings 504, a double positioning seal is achieved to prevent dust / moisture from entering from the gaps in the end cover 5, and the installation and disassembly are convenient.

[0025] Further as Figure 1 As shown, it is worth noting that the end caps 5 are fixedly connected to the four corners of one side of the protective shell 4 by fixing bolts 404 and corresponding connecting holes 503. The end caps 5 can be quickly installed by the cooperation of the four corner fixing bolts 404 and connecting holes 503, avoiding the cumbersome operation of traditional screw tightening and improving maintenance efficiency by more than 50%.

[0026] This solution has the following working process: When the brushless motor is working, the motor body 1 drives the rotating shaft 2 to rotate, which in turn drives the fan structure 8 connected by the coupling 7 to rotate synchronously, forming a forced airflow. External air enters through the annular air inlet between the support blocks 402, and passes through the multi-layer gradient filter plates 602 of the filter structure 6: the upper layer with 0.5-1mm mesh intercepts large dust particles, the lower layer with 0.1-0.3mm mesh filters fine impurities, and the inclined dust guiding slope guides the dust to the edge of the filter plate to accumulate with the help of airflow and gravity, avoiding clogging of the mesh. The purified airflow is accelerated to dissipate heat by the heat dissipation fins 401, and finally discharged from the outer casing 9 by the fan structure 8.

[0027] The vibration of the motor body 1 is absorbed by the multi-stage buffer device 3: the sliding plate 3021 slides along the first connecting plate 301, and the anti-slip coating 304 reduces displacement friction; the shock-absorbing spring 303 buffers axial impact; the combined structure of the support plate 3022 and the sliding plate disperses radial vibration energy. The regular polygonal cross-section of the protective shell 4 enhances rigidity and prevents deformation by external forces. The end cover 5 is engaged with the first protrusion 101 and the second protrusion 403 through the limiting groove 502, and together with the rubber ring 504, forms a sealing barrier to prevent external liquids or dust from seeping in. The whole system achieves efficient heat dissipation, dynamic shock absorption, and multi-stage protection in synergistic operation.

[0028] As can be seen from the above working process: the annular air inlet formed between the support blocks 402 expands the contact area of ​​the heat dissipation airflow, and the external fan blade structure 8 accelerates air circulation and reduces the temperature rise of the motor. The snap-fit ​​design of the first protrusion 101, the second protrusion 403 and the limiting groove 502, together with the rubber ring 504, achieves double positioning and sealing, preventing dust / moisture from entering from the gap of the end cover 5. The installation and disassembly are convenient. The end cover 5 can be quickly installed by the cooperation of the four corner fixing bolts 404 and the connecting holes 503, avoiding the cumbersome operation of traditional screw tightening, and improving maintenance efficiency by more than 50%.

[0029] Further as Figure 3 As shown, it is worth noting that the filter structure 6 has an installation groove 601 in the middle, and several sets of detachable V-shaped filter plates 602 are installed in the installation groove 601. Each filter plate 602 has filter holes 603. The mesh density of the filter holes 603 decreases from top to bottom, with the upper mesh diameter being 0.5-1mm and the lower mesh diameter being 0.1-0.3mm. The filter plate 602 and the air inlet form a dust-guiding slope of 5°-15°. Through the gradient filtration of the V-shaped filter plate 602, the gradient mesh of the detachable V-shaped filter plate 602 (the upper 0.5-1mm intercepts large particles, and the lower 0.1-0.3mm filters fine dust) achieves multi-stage dust prevention. The inclined dust-guiding slope (5°-15°) utilizes gravity for self-cleaning, reducing filter clogging.

[0030] Further as Figure 4 As shown, it is worth noting that each buffer device 3 includes a first connecting plate 301 and a second connecting plate 302. The upper and lower ends of the second connecting plate 302 are respectively fixedly connected to a support plate 3022 or a sliding plate 3021. The two sides of the sliding plate 3021 are slidably connected to the middle of the first connecting plate 301. The contact surfaces of the sliding plates 3021 and the sliding plate 3021 are provided with an anti-slip coating 304. The lower end of the sliding plate 3021 is fixedly connected to the upper surface of the lower end of the first connecting plate 301 by a shock-absorbing spring 303. Through the combined buffer structure of the sliding plate 3021 and the spring 303, the multi-directional impact energy is absorbed through sliding friction and elastic deformation. The anti-slip coating 304 prevents the components from loosening under high-frequency vibration.

[0031] Further as Figure 1 As shown, it is worth noting that heat dissipation fins 401 are fixedly connected to the outer surface of the protective shell 4 between the support blocks 402. Through the layout of the heat dissipation fins, the heat dissipation fins 401 on the outer side of the shell 4 are staggered with the support blocks 402, which optimizes the heat dissipation airflow path, improves the airflow turbulence intensity, and improves the heat dissipation efficiency by more than 30% compared with the traditional flat shell 4.

[0032] In summary: Through gradient filtration using the V-shaped filter plate 602, the gradient mesh of the detachable V-shaped filter plate 602 (0.5-1mm in the upper layer intercepts large particles, and 0.1-0.3mm in the lower layer filters fine dust) achieves multi-stage dust prevention; the inclined dust guide slope (5°-15°) utilizes gravity for self-cleaning, reducing filter clogging; the buffer device 3 uses a combination of sliding plate 3021 and spring 303, and a combination of sliding plate 3021 and shock-absorbing spring 303 to absorb multi-directional impact energy through sliding friction and elastic deformation; the anti-slip coating 304 prevents components from loosening under high-frequency vibration; and the heat dissipation fin layout, with the heat dissipation fins 401 and support block 402 on the outer side of the outer shell 4 staggered, optimizes the heat dissipation airflow path, improves airflow turbulence intensity, and increases heat dissipation efficiency by more than 30% compared to the traditional flat outer shell 4.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A brushless motor with a protection structure, comprising a motor body (1) and a rotating shaft (2), characterized in that: The outer surface of the motor body (1) is fixedly connected to a protective shell (4) by several ring-shaped buffer devices (3). The protective shell (4) has a regular polygonal cross section. Support blocks (402) are fixedly connected to the front and rear ends and the middle of the outer side of the protective shell (4). The outer surface of the rotating shaft (2) is slidably connected to an end cover (5). The inner side of the end cover (5) is provided with a slot (501), and its edge extends to the other side of the end cover (5). A filter structure (6) is provided in the slot (501). The outer surface of the rotating shaft (2) is located outside the end cover (5) and is fixedly connected to a fan blade structure (8) by a coupling (7). The outer side of the fan blade structure (8) is provided with a shell (9).

2. The brushless motor with a protection structure according to claim 1, characterized in that: An annular air inlet is formed between the support blocks (402).

3. The brushless motor with a protection structure according to claim 1, characterized in that: The motor body (1) and the protective shell (4) are respectively provided with a first protrusion (101) and a second protrusion (403) on one side. The end cover (5) is provided with two sets of limiting grooves (502) on one side. The limiting grooves (502) are connected to the first protrusion (101) or the second protrusion (403), and a rubber ring (504) is installed between the limiting grooves (502) and the first protrusion (101) or the second protrusion (403).

4. The brushless motor with a protection structure according to claim 1, characterized in that: The protective shell (4) has end caps (5) fixedly connected to the four corners of one side by fixing bolts (404) and corresponding connecting holes (503).

5. The brushless motor with a protection structure according to claim 1, characterized in that: The filter structure (6) has an installation groove (601) in the middle. Several sets of detachable V-shaped filter plates (602) are installed in the installation groove (601). Each filter plate (602) has filter holes (603). The mesh density of the filter holes (603) decreases from top to bottom. The diameter of the upper mesh is 0.5-1mm and the diameter of the lower mesh is 0.1-0.3mm. The filter plate (602) and the air inlet form a dust guiding slope of 5°-15°.

6. The brushless motor with a protective structure according to claim 1, characterized in that: The buffer device (3) includes a first connecting plate (301) and a second connecting plate (302). The upper and lower ends of the second connecting plate (302) are respectively fixedly connected to a support plate (3022) or a sliding plate (3021). The two sides of the sliding plate (3021) are slidably connected to the middle of the first connecting plate (301). The contact surfaces of the sliding plate (3021) and the sliding plate (3021) are provided with anti-slip coating (304). The lower end of the sliding plate (3021) is fixedly connected to the upper surface of the lower end of the first connecting plate (301) by a shock-absorbing spring (303).

7. The brushless motor with a protective structure according to claim 1, characterized in that: The outer surface of the protective shell (4) is fixedly connected to heat dissipation fins (401) between the support blocks (402).

Images