Waterproof steering engine and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of steering engines, and particularly discloses a waterproof steering engine and electronic equipment, the waterproof steering engine comprises a casing, a driving mechanism, an angle detection mechanism and a circuit board, the waterproof steering engine is provided with an accommodating cavity and a shaft hole, the outer surface of the casing extends to form a first water retaining ring, and the first water retaining ring is arranged around the shaft hole; the driving mechanism comprises a driving assembly and an annular cover, the annular cover comprises a cover body and a second water retaining ring, the annular cover is arranged around the output shaft, the second water retaining ring is fixed to the surface, facing the machine shell, of the cover body, the second water retaining ring is arranged around the output shaft, and the first water retaining ring and the second water retaining ring are arranged at intervals in the axial direction perpendicular to the output shaft; the projection of the first water retaining ring and the projection of the second water retaining ring are at least partially overlapped; the circuit board is connected with the angle detection mechanism and the driving mechanism. By means of the mode, the first water retaining ring and the second water retaining ring can be used for effectively blocking water possibly entering along the gap between the shaft hole and the output shaft, and the probability that water enters the steering engine is reduced.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of steering gears, and in particular to a waterproof steering gear and electronic equipment. Background Art

[0002] As a position (angle) servo drive, a servo is suitable for control systems that require continuous and maintained angle changes. It consists of a housing, motor, reduction gear set, sensor, and control circuitry, forming an automatic control device. Its operating principle is that the control circuit receives sensor signals and, after applying complex algorithms to them, controls the motor's speed and direction, achieving the desired angle. Servos are used in a variety of applications, including marine, aerospace, drones, industrial automation, and electronic toys. They are key components for achieving flexible movement and precise control of equipment.

[0003] In the process of realizing the present invention, the inventors of the present invention found that: currently, the working environment of the servo is mostly outdoors, facing direct contact with rain or other working scenarios that may come into contact with water. The output shaft of the motor, as the working part that drives the equipment, needs to extend through the shaft hole of the shell. In order to ensure the rotation of the output shaft, a certain gap needs to be maintained between the side wall of the output shaft and the inner wall of the shaft hole. External liquid can easily extend into the interior of the servo along the gap, thereby damaging the internal components of the servo. Utility Model Content

[0004] The main technical problem solved by the embodiments of the utility model is to provide a waterproof steering gear and electronic equipment, which can effectively prevent external water from entering the interior of the waterproof steering gear.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a waterproof steering gear, including: a casing, provided with a receiving cavity and a shaft hole, the shaft hole connects the receiving cavity with the outside world, and a first water retaining ring extends from the outer surface of the casing, and the first water retaining ring is arranged around the shaft hole; a driving mechanism, including a driving component and a ring cover, the output shaft of the driving component extends from the shaft hole to the receiving cavity, the ring cover includes a cover body and a second water retaining ring, the cover body is fixed to the side wall of the part of the output shaft extending from the receiving cavity, and the cover body is arranged around the output shaft, and the second water retaining ring is fixed to the cover body facing the casing. surface, and the second water retaining ring is arranged around the output shaft, the first water retaining ring and the surface of the cover body facing the casing are separated by a first gap, the second water retaining ring and the surface of the casing facing the cover body are separated by a second gap, along the axial direction perpendicular to the output shaft, the first water retaining ring and the second water retaining ring are spaced apart, and the projection of the first water retaining ring and the projection of the second water retaining ring at least partially overlap; an angle detection mechanism is arranged in the receiving cavity, and the angle detection mechanism is used to detect the rotation angle of the output shaft; a circuit board is arranged in the receiving cavity, and the circuit board is connected to the angle detection mechanism and the driving mechanism.

[0006] Optionally, the number of the first water retaining ring and the second water retaining ring are both multiple; the multiple first water retaining rings are stacked in sequence, and any two adjacent first water retaining rings are spaced apart; the multiple second water retaining rings are stacked in sequence, and any two adjacent second water retaining rings are spaced apart; one second water retaining ring extends between two adjacent first water retaining rings, and one first water retaining ring extends between two adjacent second water retaining rings.

[0007] Optionally, the outer surface of the housing is recessed toward the receiving cavity to form a receiving groove, the shaft hole and the first water retaining ring are both arranged at the bottom of the receiving groove, and the ring cover is received in the receiving groove.

[0008] Optionally, the other surface of the cover body facing away from the housing is flush with the outer surface of the housing at the shaft hole.

[0009] Optionally, the ring cover and the output shaft are integrally formed.

[0010] Optionally, the driving mechanism further includes a mounting plate, which is fixed to the end of the output shaft extending out of the receiving cavity, and the mounting plate is used to be fixed to an external device.

[0011] Optionally, along a direction perpendicular to the output shaft, the cross-sectional area of ​​the mounting plate is larger than the cross-sectional area of ​​the annular cover, and the mounting plate covers the annular cover.

[0012] Optionally, a screw hole is provided at the end of the output shaft extending out of the accommodating cavity, the mounting plate includes a plate body and a screw connection piece, the plate body is provided with a mounting hole, and the screw connection piece passes through the mounting hole and is screwed to the screw hole.

[0013] Optionally, the casing includes an upper shell, a lower shell and a sealing gasket, the upper shell and the lower shell are detachably fixed, the upper shell and the lower shell jointly enclose the receiving cavity, and the sealing gasket is arranged at the joint between the upper shell and the lower shell.

[0014] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide an electronic device, including the above waterproof servo.

[0015] The beneficial effects of the embodiment of the utility model are as follows: different from the prior art, the embodiment of the utility model provides a waterproof servo, comprising: a casing, a driving mechanism, an angle detection mechanism and a circuit board; wherein the casing is provided with a receiving cavity and an axial hole, the axial hole connects the receiving cavity with the outside world, a first water retaining ring is extended from the outer surface of the casing, and the first water retaining ring is arranged around the axial hole; the driving mechanism comprises a driving assembly and a ring cover, the output shaft of the driving assembly extends from the axial hole to the receiving cavity, the ring cover comprises a cover body and a second water retaining ring, the cover body is fixed to the side wall of the portion of the output shaft extending from the receiving cavity, and the cover body is arranged around the output shaft, and the second water retaining ring is fixed to the The cover body faces the surface of the housing, and the second water retaining ring is arranged around the output shaft, the first water retaining ring and the surface of the cover body facing the housing are separated by a first gap, and the second water retaining ring and the surface of the housing facing the cover body are separated by a second gap, along the axial direction perpendicular to the output shaft, the first water retaining ring and the second water retaining ring are spaced apart, and the projection of the first water retaining ring and the projection of the second water retaining ring at least partially overlap; the circuit board is connected to the angle detection mechanism and the drive mechanism, the angle detection mechanism is used to detect the rotation angle of the output shaft, and the circuit board controls the operation of the drive mechanism according to the rotation angle feedback of the angle detection mechanism to meet the current working requirements. Through the above structure, the utility model can use the first water retaining ring and the second water retaining ring to effectively block water along the axial direction and along the radial direction of the output shaft, greatly reducing the possibility of water entering the interior of the waterproof steering gear through the gap between the output shaft and the shaft hole. In addition, the first gap between the first water retaining ring and the second water retaining ring and the second gap between the second water retaining ring and the surface of the machine prolong the path for water to enter the interior of the waterproof steering gear through the gap, further improving the waterproof capability of the waterproof steering gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. 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 the drawings without paying any creative work.

[0017] Figure 1 This is an exploded schematic diagram of a waterproof servo provided by an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the assembly of a waterproof steering gear provided by an embodiment of the present utility model;

[0019] Figure 3 This is a schematic cross-sectional view of a waterproof steering gear provided by an embodiment of the present utility model;

[0020] Figure 4 yes Figure 3 A partial enlarged view of part A in the middle;

[0021] Figure 5 yes Figure 4 A partial enlarged view of part B in the middle.

[0022] Reference numerals:

[0023] 1. Casing;

[0024] 11. Accommodating cavity; 12. Axial hole; 13. First water retaining ring; 131. Water retaining eaves;

[0025] 132, first gap; 14, receiving groove; 15, sealing groove; 16, upper shell; 161, annular ridge; 17, lower shell; 171, annular groove; 18, sealing gasket;

[0026] 2. Driving mechanism;

[0027] 21. Drive assembly; 211. Output shaft; 2111. First shaft portion; 2112. Second shaft portion; 2113. Screw hole; 2114. Limiting portion; 2115. External teeth;

[0028] 22, ring cover; 221, cover body; 222, second water retaining ring; 222a, second gap;

[0029] 23. Mounting plate; 231. Plate body; 2311. Mounting hole; 232. Fixing member; 2321. Screw-on member; 2121a. Bolt; 2121b. Nut; 233. Receiving groove; 234. Limiting groove;

[0030] 3. Angle detection mechanism;

[0031] 4. Circuit board;

[0032] 5. Sealing ring; 51. Ring body; 52. Ring-shaped sealing portion; 53. First cavity; 54. Second cavity; 55. Wear-resistant sealing sheet; 56. Elastic member;

[0033] 6. First oil seal medium;

[0034] 7. Second oil seal medium. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0036] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in this specification and in the description of this utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the relevant listed items.

[0037] See also Figure 1 The waterproof servo 1000 includes a casing 1, a driving mechanism 2, an angle detection mechanism 3 and a circuit board 4. The casing 1 is provided with a receiving cavity 11 and an axial hole 12. The axial hole 12 connects the receiving cavity 11 with the outside world. The driving mechanism 2, the angle detection mechanism 3 and the circuit board 4 are all received in the receiving cavity 11. The output shaft 211 of the driving mechanism 2 partially extends through the axial hole 12, and the driving mechanism 2 and the angle detection mechanism 3 are both electrically connected to the circuit board 4. The angle detection mechanism 3 is used to detect the rotation angle of the output shaft 211. The circuit board 4 is used to receive the data detected by the angle detection mechanism 3 and control the movement of the driving mechanism 2 according to the internal control algorithm to meet the current working needs.

[0038] For the above-mentioned case 1, see Figures 1 to 4A first water retaining ring 13 is extended from the outer surface of the casing 1. Specifically, the first water retaining ring 13 extends in a direction parallel to the central axis of the shaft hole 12. The first water retaining ring 13 is arranged around the shaft hole 12. The first water retaining ring 13 is used to prevent external water from flowing into the shaft hole 12 along a direction perpendicular to the central axis of the shaft hole 12; further, the first water retaining ring 13 is extended with a water retaining eave 131 in a direction perpendicular to the central axis of the shaft hole 12. The water retaining eave 131 is arranged around one end of the first water retaining ring 13 away from the casing 1. The water retaining eave 131 is used to hinder the flow of water that may be attached to the outer wall of the first water retaining ring 13, thereby increasing the resistance to water movement.

[0039] For the above-mentioned drive mechanism 2, please refer to Figures 1 to 4 The drive mechanism 2 includes a drive assembly 21 and a ring cover 22. The output shaft 211 of the drive assembly 21 extends from the shaft hole 12 to the receiving chamber 11. The ring cover 22 includes a cover body 221 and a second water retaining ring 222. The cover body 221 is fixed to the side wall of the portion of the output shaft 211 extending from the receiving chamber 11, and the cover body 221 is arranged around the output shaft 211. The second water retaining ring 222 is fixed to the surface of the cover body 221 facing the housing 1 to prevent external water from directly entering the waterproof servo 1000 along the axial direction of the output shaft 211 through the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12. The first water retaining ring 13 and the second water retaining ring 222 are arranged around the output shaft 211 to prevent external water from entering the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12 along the radial direction of the output shaft 211. The first water retaining ring 13 and the surface of the cover body 221 facing the casing 1 are separated by a first gap 132, and the second water retaining ring 222 and the surface of the casing 1 facing the cover body 221 are separated by a second gap 222a. Along the axial direction perpendicular to the output shaft 211, the first water retaining ring 13 and the second water retaining ring 222 are spaced apart, and the projection of the first water retaining ring 13 and the projection of the second water retaining ring 222 at least partially overlap. Through the above structure, the first water retaining ring 13 and the second water retaining ring 222 are spaced apart to match the first gap 132 and the second gap 222a, and the projection of the first water retaining ring 13 and the projection of the second water retaining ring 222 at least partially overlap, which greatly increases the path that external water needs to pass through to enter the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12 along the radial direction of the output shaft 211, thereby improving the waterproof ability of the waterproof servo 1000 and extending the service life of the waterproof servo 1000.

[0040] It is understandable that the number of the first water retaining ring 13 and the second water retaining ring 222 is not limited to only one each. In some embodiments, the number of the first water retaining ring 13 and the second water retaining ring 222 is multiple, multiple first water retaining rings 13 are stacked in sequence, and any two adjacent first water retaining rings 13 are spaced apart, multiple second water retaining rings 222 are stacked in sequence, and any two adjacent second water retaining rings 222 are spaced apart, a second water retaining ring 222 extends between two adjacent first water retaining rings 13, and a first water retaining ring 13 extends between two adjacent second water retaining rings 222. The mutually nested first water retaining ring 13 and second water retaining ring 222 further increase the path that external water needs to pass through to enter the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12 along the radial direction of the output shaft 211, further improving the waterproof capability of the waterproof servo 1000.

[0041] In some embodiments, see Figure 4 The outer surface of the housing 1 is recessed toward the receiving cavity 11 to form a receiving groove 14. The shaft hole 12 and the first water retaining ring 13 are both disposed at the bottom of the receiving groove 14, with the shaft hole 12 located at the center of the receiving groove 14. The annular cover 22 is received in the receiving groove 14, thereby reducing the height of the annular cover 22 protruding from the outer surface of the housing 1, improving the integration of the waterproof servo 1000, reducing the overall volume of the waterproof servo 1000, and thus reducing the space required for installing the waterproof servo 1000. Furthermore, the other surface of the cover 221 facing away from the housing 1 is flush with the outer surface of the housing 1 at the shaft hole 12, so that the annular cover 22 does not protrude from the outer surface of the housing 1, making the annular cover 22 appear integrated with the housing 1 and enhancing its aesthetics.

[0042] In some embodiments, the ring cover 22 and the output shaft 211 are integrally formed, thereby eliminating the possibility of external water entering through the gap at the connection position between the ring cover 22 and the output shaft 211, and further ensuring that the ring cover 22 can prevent external water from entering the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12.

[0043] In order to further improve the waterproof performance of the waterproof servo 1000 or to distinguish it from the technical solution of using the first water retaining ring 13 and the second water retaining ring 222 for waterproofing, in some embodiments, refer to Figure 4 and Figure 5The housing 1 is provided with a sealing groove 15 on the inner wall of the receiving chamber 11, and the shaft hole 12 is located at the bottom of the sealing groove 15; the output shaft 211 includes a first shaft portion 2111 and a second shaft portion 2112 connected to each other, and the end of the second shaft portion 2112 away from the first shaft portion 2111 is connected to the drive assembly 21, and the first shaft portion 2111 extends out of the receiving chamber 11 through the sealing groove 15 and the shaft hole 12; the waterproof steering gear 1000 includes a sealing ring 5, which is provided in the sealing groove 15, and the sealing ring 5 is sleeved on the first shaft portion 211 1. Along the axial direction of the output shaft 211, the two ends of the sealing ring 5 respectively abut the bottom of the sealing groove 15 and the second shaft portion 2112. Through this structure, the sealing ring 5 further seals and protects the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12 within the receiving chamber 11, forming an effective waterproof barrier that significantly reduces or prevents moisture from penetrating into the waterproof servo 1000 through the shaft hole 12, thereby protecting the electrical components and mechanical structures within the waterproof servo 1000 from water damage.

[0044] Furthermore, the sealing ring 5 includes a ring body 51 and an annular sealing portion 52 extending from the inner annular surface of the ring body 51. The annular sealing portion 52 is mounted on and abuts the first shaft portion 2111. A first cavity 53 is enclosed between the ring body 51, the annular sealing portion 52, and the second shaft portion 2112. The waterproof servo 1000 also includes a first oil sealing medium 6, which fills the first cavity 53.

[0045] It can be understood that the cross-section of the annular sealing portion 52 is T-shaped, so that the annular sealing portion 52 forms a cavity with the surrounding environment after abutting against the output shaft 211 .

[0046] It should be noted that the sealing ring 5 does not rotate with the output shaft 211. The above-mentioned first oil sealing medium 6 is filled in the first cavity 53 as a lubricant. When the output shaft 211 rotates, friction occurs between the first shaft portion 2111 and the annular sealing portion 52. As the use time increases, long-term friction will inevitably cause the sealing ring 5 to wear, and a wear gap will appear between the annular sealing portion 52 and the first shaft portion 2111. As the wear gap increases, part of the lubricant relies on its own fluidity and the liquid's own tension to fill the wear gap between the first shaft portion 2111 and the annular sealing portion 52, thereby reducing the wear between the first shaft portion 2111 and the annular sealing portion 52. In addition, since the first oil sealing medium 6 is filled in the wear gap in a timely manner, the first oil sealing medium 6 further ensures the waterproof performance of the sealing ring 5 when it wears.

[0047] In some embodiments, there are multiple annular sealing portions 52, spaced axially along the ring body 51, and each abutting the first shaft portion 2111. The multiple annular sealing portions 52 provide multiple levels of axial sealing protection for the output shaft 211. Furthermore, a second cavity 54 is defined between any two adjacent annular sealing portions 52. The waterproof servo 1000 also includes multiple second oil sealing media 7, each of which is filled within a second cavity 54. The multiple second oil sealing media 7 not only ensure lubrication between the output shaft 211 and the sealing ring 5, but also provide multiple levels of waterproof protection for the gap between the sidewall of the output shaft 211 and the inner wall of the shaft hole 12. Water axially outside the output shaft 211 must pass through the multiple annular sealing portions 52 and the multiple second oil sealing media 7 before entering the receiving cavity 11 of the waterproof servo 1000, significantly enhancing the waterproof performance of the waterproof servo 1000.

[0048] It is understandable that, since the first oil sealing medium 6 and the second oil sealing medium 7 have a certain fluidity, in order to prevent the waterproof servo 1000 from gradually expanding due to wear clearance during long-term operation, which would make it difficult for the first oil sealing medium 6 to be stably maintained in the first cavity 53 and the second oil sealing medium 7 to be stably maintained in the second cavity 54, in some embodiments, the sealing ring 5 further includes a wear-resistant sealing sheet 55, which abuts against the inner surface of the housing 1 to prevent the first oil sealing medium 6 and the second oil sealing medium 7 from entering the receiving cavity 11.

[0049] For details, please refer to Figure 5The wear-resistant sealing sheet 55 is arranged around the second shaft portion 2112 of the output shaft 211, and the wear-resistant sealing sheet 55 wraps the second shaft portion 2112, so that the output shaft 211 forms another waterproof protection measure in the axial direction. The wear-resistant sealing sheet 55 includes a first surface and a second surface relative to each other. The first surface abuts the inner surface of the housing 1, and the second surface abuts the gear portion provided on the output shaft 211 through an elastic member 56, and the elastic member 56 is in a compressed state. The elastic potential energy stored in the elastic member 56 is used to make the wear-resistant sealing sheet 55 5 is always in contact with the inner surface of the housing 1. Because the wear-resistant sealing sheet 55 rotates with the output shaft 211, even if the waterproof servo 1000 is used for a long time and the sealing ring 5 wears out, causing the first oil-sealing medium 6 to leak out of the first chamber 53 and the second oil-sealing medium 7 to leak out of the second chamber 54, the wear-resistant sealing sheet 55, which is always in contact with the inner surface of the housing 1, can block the first and second oil-sealing mediums 6 and 7, effectively reducing the time required for the first and second oil-sealing mediums 6 and 7 to enter the receiving chamber 11. Furthermore, when the first and second oil-sealing mediums 6 and 7 penetrate between the wear-resistant sealing sheet 55 and the inner surface of the housing 1, they also lubricate the wear-resistant sealing sheet 55, thereby further extending the service life of the wear-resistant sealing sheet 55.

[0050] It should be noted that when the output shaft 211 is divided into a first shaft portion 2111 and a second shaft portion 2112, and the diameter of the first shaft portion 2111 is smaller than the diameter of the second shaft portion 2112, the ring cover 22 and the output shaft 211 in the above embodiment should be set to be detachable to facilitate the assembly of the output shaft 211; or when the diameter of the shaft hole 12 is larger than the diameter of the second shaft portion 2112 of the output shaft 211, a bearing is provided between the side wall of the output shaft 211 and the shaft hole 12 to provide support for the output shaft 211 to avoid shaking caused by excessive gap between the output shaft 211 and the shaft hole 12.

[0051] In some embodiments, see Figure 4 The drive mechanism 2 further includes a mounting plate 23, which is fixed to the end of the output shaft 211 extending out of the receiving cavity 11. Specifically, the mounting plate 23 is removably fixed to the end of the first shaft portion 2111 away from the second shaft portion 2112. The mounting plate 23 is used to secure to an external device. The mounting plate 23 is used to connect the output shaft 211 to an external motion mechanism, achieving force transmission and motion control, thereby improving the convenience of connecting the external motion device to the waterproof servo 1000. Moreover, because the mounting plate 23 is fixed to the end of the output shaft 211 extending out of the receiving cavity 11, the mounting plate 23 effectively prevents external water or dust from penetrating into the interior of the waterproof servo 1000 through the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12, thereby protecting the internal electronic components and mechanical parts from corrosion and damage.

[0052] It can be understood that the connection methods of fixing the mounting plate 23 to the output shaft 211 include but are not limited to: screw connection, clamping, pin connection, riveting, interference fit, flange connection, one-piece molding, etc. In this embodiment, preferably, the mounting plate 23 is screwed to the output shaft 211.

[0053] Specifically, the end of the output shaft 211 extending from the receiving cavity 11 is provided with a screw hole 2113. The mounting plate 23 includes a plate body 231 and a fixing member 232. The plate body 231 is provided with a mounting hole 2311. The fixing member 232 passes through the mounting hole 2311 and is screwed into the screw hole 2113. The screw connection generates a large axial force when tightened, thereby ensuring the reliability of the connection between the mounting plate 23 and the output shaft 211. The detachable nature of the threaded connection also facilitates the removal and replacement of the mounting plate 23. The fixing member 232 is preferably a screw connection 2321.

[0054] Furthermore, in some embodiments, the inner wall of the mounting hole 2311 is provided with internal teeth (not shown), and the sidewall of the portion of the output shaft 211 extending from the receiving cavity 11 is provided with external teeth. The output shaft 211 is inserted into the mounting hole 2311, and the external teeth mesh with the internal teeth to secure the mounting plate 23 and the extension portion using the fixing member 232. This meshing of the internal and external teeth ensures high-precision transmission between the output shaft 211 and the mounting plate 23, reducing backlash and errors during transmission, allowing the rotation of the output shaft 211 to be accurately transmitted to the mounting plate 23, thereby ensuring the synchronization and accuracy of the entire waterproof servo 1000. Furthermore, the meshing of the internal and external teeth enables the mounting plate 23 to withstand the strong torque from the output shaft 211. In situations where high torque transmission is required, this design ensures that the mounting plate 23 will not be damaged or fail due to excessive torque. Furthermore, due to the presence of the external teeth of the output shaft 211 , the output shaft 211 can directly mesh with the external device through the external teeth, thereby transmitting the torque of the output shaft 211 , thereby expanding the connection method between the output shaft 211 and the external device.

[0055] In some embodiments, see Figure 4 The output shaft 211 extends out of the side wall of the accommodating cavity 11 and also extends a limiting portion 2114. The limiting portion 2114 is located between the external teeth and the casing 1. The surface of the mounting plate 23 facing the casing 1 abuts against the limiting portion 2114. The limiting portion 2114 is used to limit the distance at which the mounting plate 23 is set along the axial direction of the output shaft 211, thereby preventing the mounting plate 23 from sliding along the axial direction of the output shaft 211 and contacting the outer surface of the casing 1; a screw hole 2113 is provided at the end of the output shaft 211 away from the accommodating cavity 11, and the screw member 2321 includes a bolt 2121a, the screw rod of the bolt 2121a is screwed into the screw hole 2113, and the nut 2121b of the bolt 2121a abuts against the other surface of the mounting plate 23 facing away from the casing 1.

[0056] In some embodiments, a receiving groove 233 is provided on the other surface of the mounting plate 23 facing away from the housing 1. The mounting hole 2311 is located at the bottom of the receiving groove 233. The nut 2121b of the bolt 2121a is received in the receiving groove 233. The provision of the receiving groove 233 reduces the foreign body sensation on the surface of the mounting plate 23, thereby reducing the effect of the nut 2121b on the connection between the mounting plate 23 and the external device. Furthermore, the thickness of the mounting plate 23 is equal to the depth of the receiving groove 233. The surface of the nut 2121b facing away from the bottom of the receiving groove 233 is flush with the surface of the mounting plate 23 facing away from the housing 1. As a result, after the bolt 2121a secures the mounting plate 23 to the output shaft 211, the mounting plate 23 does not appear to be protruding, thereby preventing the nut 2121b from obstructing the connection between the mounting plate 23 and the external device.

[0057] In some embodiments, a limiting groove 234 is provided on the surface of the mounting plate 23 facing the housing 1, and the limiting portion 2114 is clamped in the limiting groove 234. Relying on the cooperation between the limiting portion 2114 and the limiting groove 234, the precise positioning of the mounting plate 23 and the output shaft 211 is ensured, and the clamping structure between the limiting portion 2114 and the limiting groove 234 can help disperse the stress generated by the mounting plate 23 when subjected to force, avoid local damage caused by stress concentration, and improve the overall structural stability of the mounting plate 23 and the output shaft 211. Moreover, the close cooperation between the limiting portion 2114 and the limiting groove 234 and the fixation of the bolt 2121a can reduce the impact of the vibration generated by the external equipment in the working state on the output shaft 211 of the mounting plate 23.

[0058] For the above-mentioned case 1, see Figure 1 The casing 1 includes an upper casing 16, a lower casing 17 and a sealing gasket 18. The upper casing 16 and the lower casing 17 are detachably fixed to facilitate the loading and unloading of the driving mechanism 2, the angle detection mechanism 3 and the circuit board 4 accommodated in the casing 1, and the arrangement of the upper casing 16 and the lower casing 17 also facilitates the later maintenance of the waterproof servo 1000; the upper casing 16 and the lower casing 17 jointly enclose a receiving cavity 11, and the sealing gasket 18 is arranged at the joint of the upper casing 16 and the lower casing 17. The arrangement of the sealing gasket 18 improves the sealing performance of the connection position between the upper casing 16 and the lower casing 17, reduces the possibility of external water or dust entering the receiving cavity 11, and protects the internal electronic components and mechanical parts from corrosion and damage.

[0059] Furthermore, to enhance the sealing effect, in some embodiments, the upper shell 16 is provided with an annular ridge 161, and the lower shell 17 is provided with an annular groove 171. The sealing gasket 18 is disposed in the annular groove 171, and the annular ridge 161 is inserted into the annular groove 171, and the annular ridge 161 abuts the sealing gasket 18. The cooperation between the annular ridge 161 and the annular groove 171 enables precise positioning of the upper shell 16 and the lower shell 17. The abutment between the annular ridge 161 and the sealing gasket 18 reduces the contact area with the sealing ridge. When the upper shell 16 and the lower shell 17 are assembled, the force per unit area on the sealing ridge is increased, thereby increasing the elastic deformation degree of the sealing ridge, and further enhancing the sealing performance of the upper shell 16 and the lower shell 17.

[0060] For the above-mentioned angle detection mechanism 3, please refer to Figure 1 The angle detection mechanism 3 includes a Hall sensor (not shown) and a plurality of magnetic parts (not shown). The plurality of magnetic parts are arranged on the output shaft 211, and the plurality of magnetic parts rotate along with the output shaft 211. The Hall sensor is used to detect the magnetic field formed by the plurality of magnetic parts, and determine the rotation angle of the output shaft 211 according to the magnetic field, generate a corresponding feedback signal, and transmit it to the circuit board 4 so that the circuit board 4 can perform subsequent calculation control.

[0061] For the above-mentioned drive assembly 21, please refer to Figure 1 The drive assembly 21 includes a motor (not shown), a drive gear (not shown), and a driven gear assembly (not shown). The driven gear assembly is rotatably mounted in the receiving chamber 11. The driven gear assembly reduces the rotational speed of the output shaft 211 by cooperating with multiple gears. Specifically, the high rotational speed of the motor's output shaft 211 is proportionally reduced by adjusting the gear ratio between the gears. The specific reduction ratio is set according to actual working requirements and the motor's rotational speed, and will not be detailed here. The motor is fixed to the receiving chamber 11, connected to the drive gear, which meshes with the driven gear assembly, and the output shaft 211 is mounted on the driven gear assembly.

[0062] It should be noted that to facilitate assembly and disassembly of the output shaft 211, the gears meshing with the output shaft 211 and other gear shafts in the driven gear set should be detachable. For example, a slot may be provided on the inner ring of the gear fixed to the output shaft, and a latching portion may extend from the sidewall of the output shaft 211, with the latching portion and the latching portion forming an interference fit. Other detachable connection methods are known in the art and will not be described in detail in this embodiment.

[0063] In an embodiment of the present utility model, the waterproof servo 1000 includes a casing 1, a driving mechanism 2, an angle detection mechanism 3 and a circuit board 4. The casing 1 is provided with a receiving cavity 11 and an axial hole 12. The axial hole 12 connects the receiving cavity 11 with the outside world. The driving mechanism 2, the angle detection mechanism 3 and the circuit board 4 are all accommodated in the receiving cavity 11. The output shaft 211 of the driving mechanism 2 partially extends through the axial hole 12, and the driving mechanism 2 and the angle detection mechanism 3 are both electrically connected to the circuit board 4. The angle detection mechanism 3 is used to detect the rotation angle of the output shaft 211. The circuit board 4 is used to receive the data detected by the angle detection mechanism 3, and control the movement of the driving mechanism 2 according to the internal control algorithm, so as to meet the current work needs. Specifically, a first water retaining ring 13 is extended from the outer surface of the casing 1, and the first water retaining ring 13 is arranged around the shaft hole 12; the driving mechanism 2 includes a driving component 21 and a ring cover 22, the output shaft 211 of the driving component 21 extends from the shaft hole 12 to the receiving cavity 11, the ring cover 22 includes a cover body 221 and a second water retaining ring 222, the cover body 221 is fixed to the side wall of the portion of the output shaft 211 extending from the receiving cavity 11, and the cover body 221 is arranged around the output shaft 211, and the second water retaining ring 222 is fixed to the surface of the cover body 221 facing the casing 1 to prevent external water from directly passing through the side wall of the output shaft 211 and the shaft hole 1 along the axial direction of the output shaft 211 2 enters the interior of the waterproof servo 1000, and the second water retaining ring 222 is arranged around the output shaft 211 to prevent external water from entering the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12 along the radial direction of the output shaft 211. The first water retaining ring 13 and the surface of the cover body 221 facing the housing 1 are separated by a first gap 132, and the second water retaining ring 222 and the surface of the housing 1 facing the cover body 221 are separated by a second gap 222a. Along the axial direction perpendicular to the output shaft 211, the first water retaining ring 13 and the second water retaining ring 222 are spaced apart, and the projection of the first water retaining ring 13 and the projection of the second water retaining ring 222 at least partially overlap. Through the above structure, the first water retaining ring 13 and the second water retaining ring 222 are spaced apart to match the first gap 132 and the second gap 222a, and the projection of the first water retaining ring 13 and the projection of the second water retaining ring 222 at least partially overlap, which greatly increases the path that external water needs to pass through to enter the gap between the side wall of the output shaft 211 and the inner wall of the shaft hole 12 along the radial direction of the output shaft 211, thereby improving the waterproof ability of the waterproof servo 1000 and extending the service life of the waterproof servo 1000.

[0064] It should be noted that the waterproof servo 1000 can be combined with the above-mentioned different structures or selected individually to form different types of servos, and the combination method is not limited. For example, a servo with a waterproof output shaft can be formed by relying on the sealing ring 5 structure set on the output shaft 211 of the waterproof servo 1000; or a servo with a detachable mounting plate can be formed by relying on the detachable setting method of the mounting plate 23, etc.

[0065] The present invention further provides an electronic device embodiment, which includes the above-mentioned waterproof servo 1000. Regarding the structure and function of the waterproof servo 1000, please refer to the above-mentioned embodiment, which will not be described in detail here.

[0066] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of the present invention; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A waterproof steering gear, characterized in that: include: The housing is provided with a receiving cavity and an axial hole, wherein the axial hole connects the receiving cavity with the outside, and a first water retaining ring extends from the outer surface of the housing, and the first water retaining ring is arranged around the axial hole; The drive mechanism comprises a drive assembly and a ring cover, wherein the output shaft of the drive assembly extends from the shaft hole into the receiving cavity, the ring cover comprises a cover body and a second water retaining ring, the cover body is fixed to the side wall of the portion of the output shaft extending out of the receiving cavity, and the cover body is arranged around the output shaft, the second water retaining ring is fixed to the surface of the cover body facing the housing, and the second water retaining ring is arranged around the output shaft, the first water retaining ring and the surface of the cover body facing the housing are separated by a first gap, the second water retaining ring and the surface of the housing facing the cover body are separated by a second gap, and along an axial direction perpendicular to the output shaft, the first water retaining ring and the second water retaining ring are spaced apart, and a projection of the first water retaining ring and a projection of the second water retaining ring at least partially overlap; An angle detection mechanism is provided in the receiving cavity, and is used to detect the rotation angle of the output shaft; A circuit board is arranged in the receiving cavity, and the circuit board is connected to the angle detection mechanism and the driving mechanism.

2. The waterproof steering gear according to claim 1, characterized in that: The number of the first water retaining ring and the number of the second water retaining ring are both multiple; Multiple first water retaining rings are stacked in sequence, and any two adjacent first water retaining rings are spaced apart. Multiple second water retaining rings are stacked in sequence, and any two adjacent second water retaining rings are spaced apart. One second water retaining ring extends between two adjacent first water retaining rings, and one first water retaining ring extends between two adjacent second water retaining rings.

3. The waterproof steering gear according to claim 1, characterized in that: The outer surface of the housing is recessed toward the receiving cavity to form a receiving groove. The shaft hole and the first water retaining ring are both arranged at the bottom of the receiving groove. The ring cover is received in the receiving groove.

4. The waterproof steering gear according to claim 3, characterized in that: The other surface of the cover body facing away from the housing is flush with the outer surface of the housing at the shaft hole.

5. The waterproof steering gear according to claim 1, characterized in that: The ring cover and the output shaft are integrally formed.

6. The waterproof steering gear according to any one of claims 1 to 5, characterized in that: The driving mechanism further includes a mounting plate, which is fixed to the end of the output shaft extending out of the receiving cavity, and is used to be fixed to an external device.

7. The waterproof steering gear according to claim 6, characterized in that: Along a direction perpendicular to the output shaft, the cross-sectional area of ​​the mounting plate is larger than the cross-sectional area of ​​the ring cover, and the mounting plate covers the ring cover.

8. The waterproof steering gear according to claim 6, characterized in that The end of the output shaft extending out of the receiving cavity is provided with a screw hole. The mounting plate includes a plate body and a screw connection piece. The plate body is provided with a mounting hole. The screw connection piece passes through the mounting hole and is screwed into the screw hole.

9. The waterproof steering gear according to any one of claims 1 to 5, characterized in that: The housing includes an upper shell, a lower shell and a sealing gasket. The upper shell and the lower shell are detachably fixed. The upper shell and the lower shell jointly enclose the receiving cavity. The sealing gasket is arranged at the joint between the upper shell and the lower shell.

10. An electronic device, characterized in that: It comprises a waterproof steering gear as described in any one of claims 1 to 9.

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