servomotor

Abstract

This utility model belongs to the field of motor technology and discloses a servo motor. The servo motor includes a housing, an end cover, a rear cover, and a seal. The housing contains a stator assembly and a rotor assembly, which can rotate relative to the stator assembly. One end of the housing has an opening, and the end cover is located at the opening. One side of the end cover abuts against the housing, and the other side of the end cover abuts against the rear cover. The seal is located between the end cover and the rear cover. The side of the seal that abuts against the end cover has at least two annular ribs, and the side of the seal that abuts against the rear cover has at least two annular ribs. This design extends the path and time for water to enter the housing, thereby improving the waterproof performance of the servo motor, increasing its reliability, and extending its service life.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to servo motors. Background Technology

[0002] Existing servo motors typically use sealing rings for overall sealing to achieve waterproofing. In current technology, the sealing rings mostly adopt a planar sealing structure, that is, the motor rear cover is tightly fitted with the sealing gasket, and the sealing gasket is then tightly fitted with the motor end cover. This design can provide basic waterproofing under normal conditions.

[0003] However, this planar sealing structure has significant limitations, primarily in its short effective waterproof distance, which poses a risk of water leakage, especially under certain conditions. For example, when the external water pressure is much greater than the internal gas pressure of the motor, moisture may seep into the motor through the tiny gap between the sealing gasket and the motor's rear cover or end cover, leading to seal failure. This leakage phenomenon is particularly prominent in high-pressure water environments or during prolonged underwater operation, severely affecting the reliability and service life of the servo motor.

[0004] Therefore, a servo motor is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a servo motor that can improve the waterproof performance, reliability, and service life of the servo motor.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Servo motors, including:

[0008] A housing, wherein a stator assembly and a rotor assembly are provided inside the housing, the rotor assembly is rotatable relative to the stator assembly, and one end of the housing is provided with an opening;

[0009] End cap and rear cover, the end cap is disposed at the opening, one side of the end cap abuts against the housing, and the other side of the end cap abuts against the rear cover;

[0010] A sealing element is disposed between the end cap and the rear cover. The side of the sealing element that abuts against the end cap has at least two annular ribs, and the side of the sealing element that abuts against the rear cover has at least two of the annular ribs.

[0011] Optionally, the servo motor further includes a fastening assembly, which includes a first fastener. The end cover has a first through hole, and the housing has a first threaded hole corresponding to the first through hole. The first fastener passes through the first through hole and the first threaded hole in sequence and is fastened to the housing.

[0012] Optionally, the fastening assembly further includes a second fastener, the end cap is provided with a second threaded hole, the rear cover is provided with a second through hole corresponding to the second threaded hole, and the second fastener is sequentially inserted through the second through hole and the second threaded hole to be fastened to the end cap.

[0013] Optionally, the seal has a positioning hole corresponding to the second threaded hole, and the second fastener can pass through the positioning hole.

[0014] Optionally, the stator assembly includes:

[0015] Multiple single-lobed stators are arranged within the housing to form a receiving space, and at least a portion of the rotor assembly is rotatably disposed within the receiving space;

[0016] The circuit board, wherein multiple single-lobe stators are soldered onto the circuit board;

[0017] Encapsulating adhesive is used to fill the gaps between two adjacent single-lobe stators and the gaps between the single-lobe stators and the housing, and the encapsulating adhesive covers the circuit board.

[0018] Optionally, the single-lobed stator includes:

[0019] The stator core has an assembly groove on its outer circumference;

[0020] An insulating bracket includes a first frame and a second frame, the first frame and the second frame being interlocked and confined within the assembly slot, and the first frame and the second frame forming a winding slot after interlocking;

[0021] Two connecting pins are spaced apart on the first frame and both are soldered to the circuit board;

[0022] The enameled wire is wound in the winding groove, and the two ends of the enameled wire are electrically connected to two connecting pins respectively.

[0023] Optionally, the rotor assembly includes:

[0024] The rotating shaft has one end rotatably connected to the first bearing inside the end cover, and the other end protrudes from the housing;

[0025] The rotor core is coaxially fixed with the rotating shaft and located within the accommodating space;

[0026] A magnet is wrapped around the outside of the rotor core, and the magnet rotates synchronously with the rotor core.

[0027] Optionally, the end cap is provided with a first mounting groove on the side facing the receiving space, and the first bearing is disposed in the first mounting groove;

[0028] The outer ring of the first bearing is fixed to the end cap, the inner ring of the first bearing is fixed to the shaft, and a plurality of first balls are provided between the inner ring and the outer ring of the first bearing.

[0029] Optionally, the rotor assembly further includes a second bearing, and a second mounting groove is provided at one end of the housing away from the end cover, and the second bearing is disposed in the second mounting groove;

[0030] The outer ring of the second bearing is fixed to the housing, the inner ring of the second bearing is fixed to the shaft, and a plurality of second balls are provided between the inner ring and the outer ring of the second bearing.

[0031] Optionally, the rotor assembly further includes an encoder disposed within a sealed cavity formed by the end cover and the rear cover, the encoder being used to detect the rotational parameters of the rotor assembly.

[0032] Beneficial effects:

[0033] The servo motor provided by this utility model includes a housing, an end cover, a rear cover, and a seal. The housing houses a stator assembly and a rotor assembly, with the rotor assembly capable of rotating relative to the stator assembly. One end of the housing has an opening, and the end cover is positioned at the opening. One side of the end cover abuts against the housing, and the other side abuts against the rear cover. The seal is positioned between the end cover and the rear cover. The side of the seal abutting against the end cover has at least two annular ribs, and the side abutting against the rear cover also has at least two annular ribs. In actual operation, when water seeps into the motor from the outside, it preferentially passes through the first annular rib, then enters the groove between the two annular ribs. Excess air stored in the groove hinders the speed and distance of water seepage. In special cases, water may need to pass through the second annular rib after passing through the groove, thus extending the path and time for water to enter the housing. This improves the waterproof performance of the servo motor, enhances its reliability, and extends its service life. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the servo motor provided in an embodiment of the present invention;

[0035] Figure 2 yes Figure 1 Sectional view at point AA;

[0036] Figure 3 yes Figure 2 A magnified view of a section at point B in the middle;

[0037] Figure 4 This is a schematic diagram of the structure of the sealing element provided in this embodiment of the utility model;

[0038] Figure 5 This is an exploded view of the servo motor provided in this embodiment of the utility model from a first-person perspective;

[0039] Figure 6 This is an exploded view of the servo motor provided in this embodiment of the utility model from a second perspective;

[0040] Figure 7 This is a schematic diagram of the stator assembly provided in an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the structure of the single-lobe stator provided in this embodiment of the utility model;

[0042] Figure 9 This is an exploded view of the single-lobe stator provided in an embodiment of this utility model.

[0043] In the picture:

[0044] 100. Housing; 101. Opening; 110. First threaded hole; 120. Second assembly slot;

[0045] 200, End cap; 210, First through hole; 220, Second threaded hole; 230, First assembly groove;

[0046] 300. Back cover; 310. Second through hole;

[0047] 400. Seal; 410. Annular rib; 420. Locating hole;

[0048] 500. Stator assembly; 510. Single-lobed stator; 511. Insulating support; 5111. First frame; 5112. Second frame; 512. Stator core; 5121. Annular groove; 513. Enamelled wire; 514. Connecting pin; 520. Circuit board; 530. Encapsulating glue;

[0049] 600, Rotor assembly; 610, Shaft; 620, Rotor core; 630, Magnet; 640, First bearing; 650, Second bearing; 660, Encoder;

[0050] 710, First fastener; 720, Second fastener. Detailed Implementation

[0051] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0052] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0055] This embodiment provides a servo motor, such as Figures 1-2 As shown, the servo motor includes a housing 100, a stator assembly 500, a rotor assembly 600, an end cover 200, a rear cover 300, and a seal 400. The housing 100 houses the stator assembly 500 and the rotor assembly 600. The rotor assembly 600 can rotate relative to the stator assembly 500. One end of the housing 100 has an opening 101, and the end cover 200 is located at the opening 101. One side of the end cover 200 abuts against the housing 100, and the other side of the end cover 200 abuts against the rear cover 300. The seal 400 is located between the end cover 200 and the rear cover 300. The side of the seal 400 that abuts against the end cover 200 has at least two annular ribs 410, and the side of the seal 400 that abuts against the rear cover 300 also has at least two annular ribs 410. Figures 3-4As shown, under actual working conditions, when water seeps into the motor from the outside, it preferentially passes through the first annular rib 410, and then enters the groove between the two annular ribs 410. The excess air stored in the groove will hinder the seepage speed and distance of the water. In special cases, after passing through the groove, the water still needs to pass through the second annular rib 410 again, which prolongs the path and time for the water to enter the inside of the housing 100, thereby improving the waterproof performance of the servo motor, improving the reliability of the servo motor, and extending the service life of the servo motor.

[0056] Optionally, such as Figure 5 As shown, the servo motor also includes a fastening assembly, which includes a first fastener 710. The end cover 200 is provided with a first through hole 210, and the housing 100 is provided with a first threaded hole 110 corresponding to the first through hole 210. The first fastener 710 passes through the first through hole 210 and the first threaded hole 110 in sequence and is fastened to the housing 100, so that the end cover 200 is firmly fixed at the opening 101 of the housing 100, effectively improving the stability of the end cover 200.

[0057] Optionally, such as Figure 5 As shown, the fastening assembly also includes a second fastener 720. The end cap 200 has a second threaded hole 220, and the rear cap 300 has a second through hole 310 corresponding to the second threaded hole 220. The second fastener 720 passes through the second through hole 310 and the second threaded hole 220 in sequence and is fastened to the end cap 200, locking the rear cap 300 and the end cap 200 together. This improves the connection strength between the rear cap 300 and the end cap 200, simplifies the assembly process, and facilitates maintenance and disassembly. Furthermore, the second fastener 720 provides axial clamping force to the rear cap 300 and the end cap 200, enhancing the tightness of the seal 400's fit between the end cap 200 and the rear cap 300, thereby further improving the sealing reliability of the seal 400.

[0058] Optionally, such as Figure 6 As shown, the seal 400 is provided with a positioning hole 420 corresponding to the second threaded hole 220. The second fastener 720 can be inserted into the positioning hole 420 to achieve precise positioning and fixation of the seal 400, effectively preventing the seal 400 from shifting during assembly or operation, thereby improving the stability and reliability of the sealing effect, while simplifying assembly operations and improving assembly efficiency.

[0059] In this embodiment, the first fastener 710 is a first fastening screw, and the second fastener 720 is a second fastening screw. The first fastening screw is fastened to the first threaded hole 110 of the housing 100 through the first through hole 210 of the end cover 200, firmly fixing the end cover 200 to the opening 101 of the housing 100, enhancing the stability of the end cover 200 and preventing loosening during operation. The second fastening screw passes through the second through hole 310 of the rear cover 300 and the second threaded hole 220 of the end cover 200 in sequence, fastening it to the end cover 200, thereby fixing the rear cover 300 to the end cover 200. The first fastener 710 and the second fastener 720 cooperate to lock the rear cover 300, the end cover 200 and the housing 100 together, providing a strong axial clamping force, thereby improving waterproof performance and sealing reliability.

[0060] Optionally, such as Figure 7 As shown, the stator assembly 500 includes multiple single-lobed stators 510, a circuit board 520, and potting compound 530. The multiple single-lobed stators 510 are arranged within the housing 100 to form a receiving space. At least a portion of the rotor assembly 600 is rotatably disposed within the receiving space. The multiple single-lobed stators 510 are all welded to the circuit board 520. The potting compound 530 fills the gaps between two adjacent single-lobed stators 510 and the gaps between the single-lobed stators 510 and the housing 100. The potting compound 530 covers the circuit board 520, which can effectively enhance the stability of the stator assembly 500, while preventing moisture and dust from entering, thus improving the insulation performance and reliability of the servo motor.

[0061] Optionally, such as Figure 8 and Figure 9 As shown, the single-lobed stator 510 includes an insulating bracket 511, a stator core 512, enameled wire 513, and connecting pins 514. The stator core 512 has an annular groove 5121 around its outer periphery. The insulating bracket 511 includes a first frame 5111 and a second frame 5112, which are interlocked and confined within the annular groove 5121, forming a winding groove. Two connecting pins 514 are spaced apart on the first frame 5111 and soldered to the circuit board 520. The enameled wire 513 is wound within the winding groove, and its two ends are electrically connected to the two connecting pins 514 respectively. The insulating bracket 511 encloses the core and isolates it from the enameled wire 513, preventing short circuits and improving the safety of the servo motor.

[0062] Optionally, such as Figure 2As shown, the rotor assembly 600 includes a shaft 610, a rotor core 620, and a magnet 630. One end of the shaft 610 is rotatably connected to a first bearing 640 inside the end cover 200, and the other end protrudes from the housing 100. The rotor core 620 is coaxially fixed with the shaft 610 and located within the receiving space. The magnet 630 is located between the rotor core 620 and the stator core 512, and the magnet 630 covers the outside of the rotor core 620. The magnet 630 rotates synchronously with the rotor core 620. The rotatable connection of one end of the shaft 610 to the end cover 200 and the protrusion of the other end from the housing 100 ensures flexible rotational support and external transmission connection, enhancing mechanical reliability. The coaxial fixation of the rotor core 620 with the shaft 610, located within the receiving space enclosed by the stator, ensures rotational accuracy and dynamic balance, reducing vibration and noise. This design optimizes the power output and efficiency of the servo motor, while the overall structure is compact, facilitating the assembly and maintenance of the servo motor.

[0063] Optionally, such as Figure 2 As shown, the end cap 200 has a first mounting groove 230 on the side facing the receiving space, and a first bearing 640 is disposed in the first mounting groove 230. The outer ring of the first bearing 640 is fixed to the end cap 200, and the inner ring of the first bearing 640 is fixed to the rotating shaft 610. A plurality of first balls are provided between the inner ring and the outer ring of the first bearing 640. This structure can support the high-speed rotation of the rotating shaft 610, reduce frictional resistance, reduce energy loss and heat generation, and improve the output efficiency of the servo motor.

[0064] Optionally, the rotor assembly 600 further includes a second bearing 650. A second mounting groove 120 is provided at the end of the housing 100 away from the end cover 200, and the second bearing 650 is disposed in the second mounting groove 120. The outer ring of the second bearing 650 is fixed to the housing 100, and the inner ring of the second bearing 650 is fixed to the rotating shaft 610. A plurality of second balls are provided between the inner ring and the outer ring of the second bearing 650. The second bearing 650 cooperates with the first bearing 640 to provide double-end support for the rotating shaft 610, effectively enhancing the radial and axial stability of the rotating shaft 610, reducing vibration and deviation during high-speed rotation of the rotating shaft 610, ensuring the motion accuracy of the rotating shaft 610, and reducing the noise during operation of the rotating shaft 610.

[0065] Optionally, the rotor assembly 600 also includes an encoder 660, which is housed within a sealed cavity formed by the end cover 200 and the rear cover 300. The encoder 660 is used to detect the rotational parameters of the rotor assembly 600. The sealed cavity effectively isolates the encoder 660 from external environmental factors such as moisture and dust, ensuring stable operation and long-term reliability. The encoder 660 detects the rotational parameters of the rotor assembly 600 (such as speed, angle, and position) in real time, providing data feedback to the servo motor control system, thereby achieving precise speed and position control. Simultaneously, the sealed cavity design simplifies the protection requirements of the encoder 660, reduces maintenance costs, and improves the overall durability and operating efficiency of the motor.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A servo motor characterized by, include: A housing (100) is provided inside the housing (100), wherein a stator assembly (500) and a rotor assembly (600) are provided, wherein the rotor assembly (600) is rotatable relative to the stator assembly (500), and one end of the housing (100) is provided with an opening (101); End cap (200) and rear cover (300), the end cap (200) is disposed at the opening (101), one side of the end cap (200) abuts against the housing (100), and the other side of the end cap (200) abuts against the rear cover (300); A sealing element (400) is disposed between the end cap (200) and the rear cover (300). The side of the sealing element (400) that abuts against the end cap (200) is provided with at least two annular ribs (410), and the side of the sealing element (400) that abuts against the rear cover (300) is provided with at least two of the annular ribs (410).

2. The servomotor of claim 1, wherein The servo motor also includes a fastening assembly, which includes a first fastener (710). The end cap (200) is provided with a first through hole (210), and the housing (100) is provided with a first threaded hole (110) corresponding to the first through hole (210). The first fastener (710) passes through the first through hole (210) and the first threaded hole (110) in sequence and is fastened to the housing (100).

3. The servomotor of claim 2, wherein The fastening assembly further includes a second fastener (720). The end cap (200) is provided with a second threaded hole (220). The rear cover (300) is provided with a second through hole (310) corresponding to the second threaded hole (220). The second fastener (720) is sequentially inserted through the second through hole (310) and the second threaded hole (220) and is fastened to the end cap (200).

4. The servomotor of claim 3, wherein The sealing element (400) is provided with a positioning hole (420) corresponding to the second threaded hole (220), and the second fastener (720) can be inserted into the positioning hole (420).

5. The servomotor of claim 1, wherein The stator assembly (500) includes: Multiple single-lobe stators (510) are arranged within the housing (100) to form a receiving space, and at least a portion of the rotor assembly (600) is rotatably disposed within the receiving space; The circuit board (520) is on which multiple single-lobe stators (510) are soldered; Encapsulating compound (530) is used to fill the gaps between two adjacent single-lobed stators (510) and the gaps between the single-lobed stators (510) and the housing (100), and the encapsulating compound (530) covers the circuit board (520).

6. The servomotor of claim 5, wherein The single-lobed stator (510) includes: Stator core (512), wherein an annular groove (5121) is provided on the outer periphery of the stator core (512); An insulating support (511) includes a first frame (5111) and a second frame (5112), wherein the first frame (5111) and the second frame (5112) are interlocked and confined within the annular groove (5121), and the first frame (5111) and the second frame (5112) form a winding groove after interlocking. Two connecting pins (514) are spaced apart on the first frame (5111) and both are soldered to the circuit board (520); Enamelled wire (513) is wound in the winding groove, and the two ends of the enamelled wire (513) are electrically connected to two connecting pins (514) respectively.

7. The servomotor of claim 5, wherein The rotor assembly (600) includes: The rotating shaft (610) is rotatably connected at one end to the first bearing (640) inside the end cover (200), and the other end protrudes from the housing (100); The rotor core (620) is coaxially fixed with the rotating shaft (610) and located within the accommodating space; A magnet (630) is wrapped around the outside of the rotor core (620), and the magnet (630) rotates synchronously with the rotor core (620).

8. The servomotor of claim 7, wherein The end cap (200) is provided with a first mounting groove (230) on the side facing the accommodating space, and the first bearing (640) is disposed in the first mounting groove (230); The outer ring of the first bearing (640) is fixed to the end cover (200), the inner ring of the first bearing (640) is fixed to the rotating shaft (610), and a plurality of first balls are provided between the inner ring of the first bearing (640) and the outer ring of the first bearing (640).

9. The servomotor of claim 7, wherein, The rotor assembly (600) further includes a second bearing (650), and a second mounting groove (120) is provided at one end of the housing (100) away from the end cover (200), and the second bearing (650) is disposed in the second mounting groove (120); The outer ring of the second bearing (650) is fixed to the housing (100), the inner ring of the second bearing (650) is fixed to the rotating shaft (610), and a plurality of second balls are provided between the inner ring of the second bearing (650) and the outer ring of the second bearing (650).

10. A servomotor according to any one of claims 1-9, characterized in that The rotor assembly (600) further includes an encoder (660), which is disposed in the sealed cavity formed by the end cover (200) and the rear cover (300). The encoder (660) is used to detect the rotation parameters of the rotor assembly (600).

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