High-protection electric rotary actuator

Abstract

The utility model relates to the technical field of rotary actuators, in particular to a high-protection electric rotary actuator. A high-protection electric rotary actuator comprises a box body and a motor located in the box body, an output shaft of the motor penetrates out of the box body, a motor shaft gear is installed on the output shaft, one end of the box body is connected with a planetary gear assembly, the planetary gear assembly comprises an inner gear ring, a sun gear, a plurality of planetary gears and a plurality of planetary carriers, and the sun gear is meshed with the motor shaft gear. One end of the inner gear ring is connected with the box body, a sealing ring II is arranged between the inner gear ring and the box body, the other end of the inner gear ring is connected with a front end cover, a planet carrier is provided with a shaft section extending out of the front end cover, and a sealing assembly is arranged between the front end cover and the shaft section; and the other end of the box body is connected with the box cover, and a sealing ring III is arranged at the joint. According to the utility model, the sealing waterproof capability of the whole actuator is greatly improved, and the rotation speed is reduced and the torque is increased; an encoder is added to feed back the motion condition, and manual operation is replaced.

Description

Technical Field

[0001] This utility model relates to the field of rotary actuator technology, and in particular to a high-protection electric rotary actuator. Background Technology

[0002] Electric rotary actuators are actuators used to control rotary motion and are widely used in various industrial and automation fields. Some industrial automation and marine industries use them to replace manual rotary motion, where output torque requirements are not high, but the application environment is harsh and durability and reliability are critical, such as in yachts. Existing electric rotary actuators in these industries have poor waterproofing, making them prone to internal water seepage over time, leading to corrosion of internal parts and loss of function; furthermore, they lack feedback systems, making it impossible to accurately position the rotation angle. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an improved version of the prior art to address the problems existing in the prior art described above.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a high-protection electric rotary actuator.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a high-protection electric rotary actuator, including a housing and a motor located inside the housing. The output shaft of the motor passes through the housing and a motor shaft gear is installed on it. One end of the housing is connected to a planetary gear assembly. The planetary gear assembly includes an internal gear ring, a sun gear, a plurality of planet gears and a plurality of planet carriers. The sun gear meshes with the motor shaft gear. One end of the internal gear ring is connected to the housing, and a sealing ring II is provided between the internal gear ring and the housing. The other end of the internal gear ring is connected to a front end cover. A planet carrier has a shaft segment extending out of the front end cover, and a sealing assembly is provided between the front end cover and the shaft segment. The other end of the housing is connected to a housing cover, and a sealing ring III is provided at the connection between the two.

[0006] Furthermore, the planetary gear assembly also includes a gear shaft, one end of which extends into the housing and is connected to a magnetic component. The other end of the gear shaft is connected to a planet carrier with a shaft segment. A sun gear, a planet carrier I, and a planet carrier II are sequentially mounted on the gear shaft. Planet carrier I is provided with planetary gear shaft I, and planetary gear I is mounted on planetary gear shaft I. Planet carrier II is provided with planetary gear shaft II, and planetary gear II is mounted on planetary gear shaft II.

[0007] Furthermore, washers are provided between the sun gear and planet carrier I, between planet carrier I and planet carrier II, and between planet carrier II and the planet carrier with shaft section.

[0008] Furthermore, a graphite copper sleeve is installed at one end of the gear shaft, the graphite copper sleeve is mounted on the housing, a wire harness is installed on the housing cover, one end of the wire harness is connected to an encoder, and the encoder is positioned close to the magnetic assembly.

[0009] Furthermore, the sealing assembly includes a first graphite copper sleeve, a second graphite copper sleeve, a shaft elastic retaining ring, and a rotary sealing ring arranged sequentially from the inside to the outside. The first graphite copper sleeve and the second graphite copper sleeve are arranged opposite to each other, and a first O-ring is provided between the first graphite copper sleeve and the second graphite copper sleeve. The end of the first graphite copper sleeve away from the first O-ring is pressed by the front end cover, and the end of the second graphite copper sleeve away from the first O-ring is limited by the shaft elastic retaining ring.

[0010] Furthermore, a flat washer is provided between the second graphite copper sleeve and the shaft elastic retaining ring.

[0011] Furthermore, a second sealing groove is provided on the end face of the housing facing the internal gear ring. The second sealing groove consists of two opposing arc grooves. The sealing ring II is fitted into the second sealing groove and has several protrusions on it.

[0012] Furthermore, a third sealing groove is provided on the end face of the box cover facing the box body. The third sealing groove has an upper arc-shaped section and a lower square section. The sealing ring III is fitted in the third sealing groove and has several protrusions on it.

[0013] Furthermore, a first sealing groove is provided on the end face of the box cover away from the box body, and a sealing ring I is provided in the first sealing groove. The sealing ring I is a flat strip with protrusions evenly distributed on its outer surface.

[0014] Furthermore, the suspension end of the shaft segment is connected to the rod head, the suspension end of the shaft segment is milled with a square notch, and the rod head is provided with an inner hole that mates with the suspension end of the shaft segment, and a second O-ring is provided at the mating point of the two.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a sealing ring III at the connection between the housing and the cover, a sealing ring II at the connection between the housing and the internal gear ring of the planetary gear assembly, and a sealing component at the output end of the planetary gear assembly, which greatly improves the sealing and waterproofing capability of the entire actuator.

[0017] The planetary gear assembly of this invention, together with the motor shaft gear on the motor output shaft, forms four reduction stages, achieving a higher reduction ratio and realizing a reduction in speed and an increase in torque.

[0018] This invention adds an encoder to provide feedback on motion status, replacing manual operation. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the planetary gear assembly in this utility model.

[0022] Figure 3 yes Figure 2 A schematic diagram of a planetary carrier with a shaft segment.

[0023] Figure 4 yes Figure 2 A schematic diagram of the structure of the sun gear.

[0024] Figure 5 yes Figure 2 A schematic diagram of the structure of the planetary carrier I.

[0025] Figure 6 yes Figure 2 A schematic diagram of the structure of planetary gear I.

[0026] Figure 7 yes Figure 2 Schematic diagram of the structure of the planetary support II.

[0027] Figure 8 yes Figure 2 A schematic diagram of the structure of planetary gear II.

[0028] Figure 9 This is a schematic diagram of the installation of the housing and sealing ring II in this utility model.

[0029] Figure 10 This is a schematic diagram of the installation of the box cover, sealing ring III, and box body in this utility model.

[0030] Figure 11 This is a schematic diagram of the installation of the box cover and sealing ring I in this utility model.

[0031] In the diagram: 1. Rod head; 2. Second O-ring; 3. Shaft retaining ring; 4. Front end cover; 5. Second graphite copper sleeve; 6. Planetary gear shaft II; 7. Planetary gear shaft I; 8. Planetary gear I; 9. Internal gear ring; 11. Sealing ring II; 12. Motor shaft gear; 13. First graphite copper sleeve; 14. Housing; 15. Sealing ring III; 16. Motor; 17. Housing cover; 18. Sealing ring I; 20. Third O-ring; 21. Wiring harness; 22. First shaft retaining ring; 23. Magnet; 24. Magnet mounting base; 25. Graphite copper sleeve; 26. Gear shaft; 27. Sun gear; 28. Washer; 29. ​​Planetary carrier I; 30. Planetary carrier II; 31. Planetary gear II; 34. First O-ring; 35. Flat washer; 36. Rotary sealing ring; 37. Planetary carrier with shaft section. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0033] like Figure 1 As shown, a high-protection electric rotary actuator includes a housing 14 and a motor 16 located inside the housing 14. The output shaft of the motor 16 extends out of the housing 14 and a motor shaft gear 12 is mounted on it. One end of the housing 14 is connected to a planetary gear assembly, and the other end of the housing 14 is connected to a housing cover 17. A sealing ring III 15 is provided at the connection between the two.

[0034] like Figures 2-8 As shown, the planetary gear assembly includes an internal gear ring 9, a gear shaft 26, a sun gear 27, a planet carrier I 29, planet gear I 8, a planet carrier II 30, planet gear II 31, and a planet carrier 37 with a shaft section. One end of the internal gear ring 9 is connected to the housing 14, and a sealing ring II 11 is provided between the internal gear ring 9 and the housing 14. The other end of the internal gear ring 9 is connected to a front end cover 4. A planet carrier has a shaft section extending out of the front end cover 4, and a sealing assembly is provided between the front end cover 4 and the shaft section. The suspended end of the shaft section is connected to a rod head 1, and the sun gear... 27 meshes with the motor shaft gear 12; one end of the gear shaft 26 extends into the housing 14 and is connected to a magnetic component at that end, and the other end of the gear shaft 26 is connected to the planet carrier 37 with a shaft section. The sun gear 27, planet carrier I 29 and planet carrier II 30 are sequentially mounted on the gear shaft 26. The planet carrier I 29 is provided with planet gear shaft I 7, and planet gear I 8 is mounted on the planet gear shaft I 7. The planet carrier II 30 is provided with planet gear shaft II 6, and planet gear II 31 is mounted on the planet gear shaft II 6.

[0035] Among them, the motor shaft gear 12 and the sun gear 27 constitute the first stage of reduction; the planetary gear shaft I7 is installed in the shaft hole of the planetary carrier I29, and the planetary gear I8 is installed on the planetary gear shaft I7, and simultaneously meshes with the internal gear ring 9 and the sun gear 27, constituting the second stage of reduction; similarly, the planetary gear I8, the planetary carrier II 30, the planetary carrier I29, and the internal gear ring 9 constitute the third stage of reduction ratio; the planetary gear II 31, the planetary carrier 37 with a shaft section, the planetary carrier II 30, and the internal gear ring 9 constitute the fourth stage of reduction ratio, and finally the torque is output by the planetary carrier 37 with a shaft section.

[0036] Washers 28 are provided between the sun gear 27 and planet carrier I 29, between planet carrier I 29 and planet carrier II 30, and between planet carrier II 30 and planet carrier 37 with shaft section, for axial positioning and to reduce wear between tooth surfaces. The suspension end of the shaft section is milled with a square notch, and the rod head 1 has an inner hole that mates with the suspension end of the shaft section to achieve the effect of transmitting torque. A second O-ring 2 is provided at the mating point to prevent corrosion of the inner hole of the rod head 1.

[0037] A graphite copper sleeve 25 is installed at one end of the gear shaft 26. The graphite copper sleeve 25 is installed on the housing 14 to support the gear shaft 26. A wire harness 21 is installed on the housing cover 17. It is limited by the first shaft elastic retaining ring 22 and sealed by the third O-ring 20. One end of the wire harness 21 is connected to an encoder, which is set close to the magnetic assembly. The magnetic assembly includes a magnet mounting base 24 and a magnet 23. The magnet mounting base 24 is mounted on the gear shaft 26 via a flat plate. The magnet 23 is mounted on the magnet mounting base 24. When the gear shaft 26 rotates, it drives the magnet 23 to rotate. The change in the magnetic field is sensed by the encoder installed on the wire harness 21 and a signal is generated and fed back to the host computer, so that the rotation angle can be effectively detected and controlled.

[0038] The sealing assembly includes a first graphite copper sleeve 13, a second graphite copper sleeve 5, a shaft elastic retaining ring 3, and a rotary sealing ring 36 arranged sequentially from the inside out. The first graphite copper sleeve 13 and the second graphite copper sleeve 5 are arranged opposite each other, and a first O-ring 34 is provided between the first graphite copper sleeve 13 and the second graphite copper sleeve 5, which mainly serves a sealing function to isolate external water flow. The end of the first graphite copper sleeve 13 away from the first O-ring 34 is pressed by the front end cover 4, and the end of the second graphite copper sleeve 5 away from the first O-ring 34 is limited by the shaft elastic retaining ring 3. A flat washer 35 is provided between the second graphite copper sleeve 5 and the shaft elastic retaining ring 3. This not only supports the planetary carrier 37 with the shaft section, but also further isolates external water flow, further enhancing the waterproof effect.

[0039] like Figure 9 As shown, a second sealing groove is provided on the end face of the housing 14 facing the internal gear ring 9. The second sealing groove consists of two opposing arc grooves. The sealing ring II 11 is fitted into the second sealing groove and has several protrusions on it. Figure 10As shown, a third sealing groove is provided on the end face of the cover 17 facing the body 14. The third sealing groove has an upper arc-shaped section and a lower square section. The sealing ring III 15 is fitted into the third sealing groove and has several protrusions. Figure 11 As shown, a first sealing groove is provided on the end face of the box cover 17 away from the box body 14, and a sealing ring I18 is provided in the first sealing groove. The sealing ring I18 is a flat strip with raised dots evenly distributed on its outer surface.

[0040] By placing sealing rings I18, II11, and III15 into their respective sealing grooves and pressing them together with their end faces, a good sealing and waterproofing effect can be achieved. The protrusions on sealing rings II11 and III15, as well as the protrusions on the outer surface of sealing ring I18, deform more under the pressure of the end faces than areas without protrusions. This not only increases the friction between the seals and the end faces but also compensates for poor sealing in some areas caused by machining errors, greatly improving the mechanism's sealing and waterproofing capabilities.

[0041] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-protection electric rotary actuator, comprising a housing (14) and a motor (16) located within the housing (14), wherein the output shaft of the motor (16) extends out of the housing (14) and a motor shaft gear (12) is mounted thereon, characterized in that: One end of the housing (14) is connected to a planetary gear assembly, which includes an internal gear ring (9), a sun gear (27), several planet gears and several planet carriers. The sun gear (27) meshes with the motor shaft gear (12). One end of the internal gear ring (9) is connected to the housing (14), and a sealing ring II (11) is provided between the internal gear ring (9) and the housing (14). The other end of the internal gear ring (9) is connected to a front end cover (4). A planet carrier has a shaft section extending out of the front end cover, and a sealing assembly is provided between the front end cover (4) and the shaft section. The other end of the housing (14) is connected to a housing cover (17), and a sealing ring III (15) is provided at the connection between the two.

2. The high-protection electric rotary actuator according to claim 1, characterized in that: The planetary gear assembly also includes a gear shaft (26), one end of which extends into the housing (14) and is connected to a magnetic component. The other end of the gear shaft (26) is connected to a planet carrier (37) with a shaft section. A sun gear (27), a planet carrier I (29), and a planet carrier II (30) are sequentially mounted on the gear shaft (26). A planetary gear shaft I (7) is provided on the planet carrier I (29), and a planetary gear I (8) is mounted on the planetary gear shaft I (7). A planetary gear shaft II (6) is provided on the planet carrier II (30), and a planetary gear II (31) is mounted on the planetary gear shaft II (6).

3. The high-protection electric rotary actuator according to claim 2, characterized in that: Washers (28) are provided between the sun gear (27) and planet carrier I (29), between planet carrier I (29) and planet carrier II (30), and between planet carrier II (30) and planet carrier (37) with shaft section.

4. The high-protection electric rotary actuator according to claim 2, characterized in that: A graphite copper sleeve (25) is installed at one end of the gear shaft (26). The graphite copper sleeve (25) is installed on the housing (14). A wire harness (21) is installed on the housing cover (17). One end of the wire harness (21) is connected to an encoder. The encoder is located near the magnetic assembly.

5. The high-protection electric rotary actuator according to claim 1, characterized in that: The sealing assembly includes a first graphite copper sleeve (13), a second graphite copper sleeve (5), a shaft elastic retaining ring (3), and a rotary sealing ring (36) arranged sequentially from the inside to the outside. The first graphite copper sleeve (13) and the second graphite copper sleeve (5) are arranged opposite to each other, and a first O-ring (34) is provided between the first graphite copper sleeve (13) and the second graphite copper sleeve (5). The end of the first graphite copper sleeve (13) away from the first O-ring (34) is pressed by the front end cover (4), and the end of the second graphite copper sleeve (5) away from the first O-ring (34) is limited by the shaft elastic retaining ring (3).

6. The high-protection electric rotary actuator according to claim 5, characterized in that: A flat washer (35) is provided between the second graphite copper sleeve (5) and the shaft elastic retaining ring (3).

7. The high-protection electric rotary actuator according to claim 1, characterized in that: The box body (14) has a second sealing groove on the end face facing the internal gear ring (9). The second sealing groove consists of two opposing arc grooves. The sealing ring II (11) is fitted into the second sealing groove and has several protrusions.

8. The high-protection electric rotary actuator according to claim 1, characterized in that: The end face of the lid (17) facing the box body (14) is provided with a third sealing groove. The third sealing groove has an upper arc-shaped section and a lower square section. The sealing ring III (15) is fitted in the third sealing groove and has several protrusions.

9. The high-protection electric rotary actuator according to claim 1, characterized in that: A first sealing groove is provided on the end face of the box cover (17) away from the box body (14), and a sealing ring I (18) is provided in the first sealing groove. The sealing ring I (18) is a flat strip with protrusions evenly distributed on its outer surface.

10. The high-protection electric rotary actuator according to claim 1, characterized in that: The suspension end of the shaft segment is connected to the rod head (1). The suspension end of the shaft segment is milled with a square notch. The rod head (1) is provided with an inner hole that mates with the suspension end of the shaft segment. A second O-ring (2) is provided at the mating point of the two.

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