Rotary driver with concentric-square-shaped drainage groove

Abstract

The utility model relates to a rotary driver with a concentric-square-shaped drainage groove. The rotary driver comprises a shell, a worm gear, a cover plate, a sealing strip, a worm and a base. The device further comprises a circumferential annular U-shaped groove, a drainage hole, a flange and a concentric-square-shaped drainage groove. Circumferential annular U-shaped grooves are formed in the inner wall, close to the inner ring, of the panel and the inner wall of the back of the shell respectively, and the flange clamped with the worm gear is arranged on the worm gear, so that a concentric-square-shaped drainage groove is formed through clamping. When the sealing ring is aged and rainwater permeates into the shell, water entering the concentric-square-shaped drainage groove is directly drained out of the drainage holes formed in the cover plate and the lower portion of the shell under the action of gravity. On the basis that an original sealing strip is directly waterproof, the concentric-square-shaped drainage grooves and the drainage holes are machined in the sealing strip, the structure is simple, machining is convenient and fast, the waterproof method combining blocking and dredging is adopted, the secondary blocking effect on water prevention is achieved, the rainproof effect is obvious, and the service life of the device is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of rotary drive equipment, and in particular to a rotary drive with a U-shaped drainage groove. Background Technology

[0002] A rotary drive is essentially a gear reducer, mainly consisting of a housing, worm gear, worm, cover plate, bearings, and end cover plates. Rotary drives can withstand high torque, high radial and axial loads, and are capable of 360-degree rotation. In the mechanical field, rotary drives are widely used in solar trackers, wind turbines, truck-mounted cranes, aerial work platforms, dock cranes, and grab buckets.

[0003] Currently, the rain protection measures for rotary drives all rely on sealing components. Preventing water blockage places extremely high demands on the surface roughness and concentricity of the seals and sealing bodies. However, due to their long-term outdoor operation in all weather conditions, the seals are prone to aging. Furthermore, the amount of rain and wind during rainy days cannot be controlled, allowing rainwater to enter the housing from the seals on the front and rear sides of the housing along the radial direction of the worm gear. This causes internal water accumulation, leading to bearing seizure and drive failure.

[0004] CN214661885U discloses a rotary actuator with a drainage structure. This design eliminates the original external sealing strip, and both ends of the housing are axially fixed with annular extensions. The inner side of these extensions is machined with a drainage structure. This drainage structure requires high precision in machining and fitting. While it eliminates the original sealing strip and achieves waterproofing by allowing rainwater to enter and then drain, relying solely on a "draining" method cannot guarantee the smooth drainage of all rainwater, thus its waterproofing effectiveness is questionable. Furthermore, rainwater can directly enter the machined surface and cause corrosion, and the internal components of the housing are also susceptible to corrosion from the external air, affecting the lifespan of the device. Utility Model Content

[0005] To address the problems of easy aging of the sealing strip and internal water accumulation leading to drive failure in existing rotary actuators, this utility model provides a rotary actuator with a U-shaped drainage groove, comprising: a housing, a worm gear, a cover plate, a sealing strip, a worm, and a base; the worm gear and the worm are disposed inside the housing, and the base is disposed at the lower part of the housing; the worm gear is horizontally nested inside the housing, and the length of the worm gear is greater than the thickness of the housing; the worm gear is fixed relative to the housing by the cover plate; the cover plate is disposed on the front side of the housing; the cover plate includes a panel and an integrally formed engaging ring, the engaging ring being vertically disposed on the panel and facing the interior of the housing; the panel covers the concentric circular cross-section formed by the worm gear and the front side of the housing; the worm is disposed below the worm gear, and the axial direction of the worm is perpendicular to the axial direction of the worm gear in the horizontal plane; the worm and the worm gear mesh through their respective surface gears;

[0006] Furthermore, it also includes a circumferential U-groove, drainage holes, flanges, and a U-shaped drainage channel;

[0007] A circumferential U-groove is formed on the inner wall of the panel near the inner ring. The outer annular wall of the circumferential U-groove near the worm gear is a panel engaging part. A flange that engages with the circumferential U-groove is machined on the circumference of the worm gear that contacts the panel. The gap between the panel engaging part, the worm gear, and the flange forms the U-shaped drainage groove. A drainage hole is formed on the panel below the circumferential U-groove, closest to the base. The drainage hole is connected to the U-shaped drainage groove.

[0008] A circumferential U-groove is formed on the inner wall of the back of the housing. The outer annular wall of the circumferential U-groove near the worm gear is a housing engagement part. A flange that engages with the circumferential U-groove is machined on the circumference of the worm gear that contacts the back of the housing. The gap between the housing engagement part, the worm gear, and the flange forms the loop-shaped drainage groove. A drainage hole is formed on the back of the housing below the circumferential U-groove, closest to the base. The drainage hole is connected to the loop-shaped drainage groove.

[0009] Furthermore, the annular U-groove is inclined away from the annular inner wall of the worm gear, and the opening of the annular U-groove facing the center of the worm gear is smaller than the opening facing both ends of the worm gear.

[0010] Furthermore, the angle between the inclined inner wall of the circumferential U-groove and the horizontal line is 10°.

[0011] Furthermore, the panel is provided with radially distributed screw holes and is fixed to the housing by bolts.

[0012] Furthermore, the sealing strip is provided on the outer side of the inner ring of the panel where it contacts the worm gear; the sealing strip is also provided on the outer wall of the back of the housing where it contacts the worm gear.

[0013] Furthermore, the sealing strip is a WT type sealing strip.

[0014] Compared with the prior art, this utility model has the following beneficial effects:

[0015] A U-shaped drainage channel is formed by creating circumferential U-grooves on the inner wall of the panel near the inner ring and on the inner wall of the back of the housing, and by creating flanges on the worm gear that engage with these grooves. When the sealing ring ages and rainwater seeps into the housing, the water entering the U-shaped drainage channel is discharged directly from the drainage holes on the panel and the bottom of the housing under the influence of gravity.

[0016] This utility model retains the original external structure of the rotary drive. On the basis of the original sealing strip directly waterproofing, a U-shaped drainage groove and drainage hole are machined inside. The structure is simple and easy to process. The waterproofing method of combining blocking and drainage has a secondary blocking effect on waterproofing, and the rainproof effect is obvious, which improves the service life of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a schematic diagram of a half-structure of the cover plate of this utility model;

[0020] Figure 4 for Figure 1 Schematic diagram of the structure along direction A;

[0021] Figure 5 for Figure 4 A sectional view along the BB direction;

[0022] Figure 6 for Figure 5 A magnified view of the central position (I).

[0023] Figure 7 for Figure 6 A schematic diagram of the combined Chinese and German parts;

[0024] Figure 8 for Figure 5 A magnified view of a portion of position II;

[0025] Figure 9 for Figure 8 A schematic diagram of the combined Chinese and German parts;

[0026] In the diagram: 1. Housing; 2. Worm gear; 3. Cover plate; 31. Panel; 32. Engaging ring; 33. Bolt hole; 34. Oil filling hole; 35. Bolt; 4. Thrust cylindrical roller bearing; 5. Sealing strip; 6. Worm; 7. Base; 8. Front end cover; 9. Rear end cover; 10. Circumferential U-groove; 11. Drain hole; 12. Barbed groove; 13. Panel engaging part; 14. Housing engaging part; 15. Flange; 16. U-shaped drainage groove. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "upper," "lower," "front," "rear," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or part referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0029] like Figure 1 , Figure 2 and Figure 4 As shown, the rotary drive includes a housing 1, a worm gear 2, a cover plate 3, a thrust cylindrical roller bearing 4, a sealing strip 5, a worm 6, a base 7, a front cover 8, and a rear cover 9. The worm gear 2 and worm 6 are disposed inside the housing 1, and the base 7 is located at the lower part of the housing 1. The worm gear 2 is horizontally nested within the housing 1, and its length is greater than the thickness of the housing 1. The worm gear 2 is fixed relative to the housing 1 by the cover plate 3. The worm 6 is disposed below the worm gear 2, and the axial direction of the worm 6 is perpendicular to the axial direction of the worm gear 2 in the horizontal plane. The worm 6 and worm gear 2 mesh through their respective surface gears. A front cover 8 and a rear cover 9 are respectively disposed at both ends of the worm 6. The cover plate 3 is located on the front side of the housing 1, as shown... Figure 1 and Figure 3As shown, the cover plate 3 includes a panel 31 and an integrally formed engagement ring 32. The engagement ring 32 is vertically disposed on the panel 31 and faces the interior of the housing 1. The panel 31 covers the concentric circular cross-section formed by the worm gear 2 and the front side of the housing 1. The thrust cylindrical roller bearing 4 is disposed close to the panel 31 and engages circumferentially with the worm gear 2.

[0030] To address the problems of easy aging of the sealing strip and internal water accumulation leading to drive failure in rotary drives, this utility model provides a rotary drive with a U-shaped drainage groove, which also includes a circumferential annular U-groove 10, a drainage hole 11, a flange 15, and a U-shaped drainage groove 16.

[0031] like Figures 5-7 As shown, a circumferential annular U-groove 10 is formed on the inner wall of the panel 31 near the inner ring. The annular outer wall of the circumferential annular U-groove 10 near the worm gear 2 is the panel engaging part 13. A flange 15 is machined on the circumference of the worm gear 2 that contacts the panel 31, engaging with the circumferential annular U-groove 10. The gap between the panel engaging part 13, the worm gear 2, and the flange 15 forms a U-shaped drainage groove 16. Figure 6 The black filling part; a drainage hole 11 is provided on the panel 31 at the point closest to the base 7 below the circumferential U-groove 10, and the drainage hole 11 is connected to the U-shaped drainage groove 16.

[0032] like Figure 5 , Figure 8 and Figure 9 As shown, a circumferential annular U-groove 10 is formed on the inner wall of the back of the housing 1. The annular outer wall of the circumferential annular U-groove 10 near the worm gear 2 is the housing engagement part 14. A flange 15 is machined around the circumference of the worm gear 2 that contacts the back of the housing 1, engaging with the circumferential annular U-groove 10. The gap between the housing engagement part 14, the worm gear 2, and the flange 15 forms a U-shaped drainage groove 16. Figure 8 The black filling part; the drain hole 11 is provided on the back of the housing 1 at the point closest to the base 7 below the circumferential U-groove 10, and the drain hole 11 is connected to the U-shaped drain groove 16.

[0033] By providing circumferential annular U-grooves 10 on the inner wall of the panel 31 near the inner ring and on the inner wall of the back of the housing 1 respectively, and by providing flanges 15 on the worm gear that engage with them, a loop-shaped drainage groove 16 is formed. In the event of aging of the sealing ring 5, water entering the housing 1 from the sealing ring 5 can flow through the loop-shaped drainage groove 16 and, with the continuously rotating worm gear 2, flow under the action of gravity to the drainage holes 11 provided on the panel 31 and the lower part of the housing 1 and be directly discharged.

[0034] To facilitate water discharge from the circumferential annular U-groove 10, the inner annular wall of the circumferential annular U-groove 10 away from the worm gear 2 is inclined, and the opening of the circumferential annular U-groove 10 facing the center of the worm gear 2 is smaller than the opening facing both ends of the worm gear 2. The angle between the inclined inner annular wall of the circumferential annular U-groove 10 and the horizontal line is 10°.

[0035] Generally, the panel 31 is also provided with radially distributed screw holes 33, which are fixed to the housing 1 by bolts 35.

[0036] Generally, such as Figure 1 , Figure 2 and Figure 5 As shown, a sealing strip 5 is provided on the outer side of the inner ring of the panel 31 where it contacts the worm gear 2; a sealing strip 5 is provided on the outer wall of the back of the housing 1 where it contacts the worm gear 2. The sealing strip 5 is a WT type sealing strip.

[0037] The sealing strip prevents external rainwater from directly entering the rotary actuator, forming the first barrier against water. Meanwhile, the circumferential U-groove 10 and drainage hole 11 are machined on the inner wall of the panel 31 near the inner ring and on the inner wall of the back of the housing 1, which have a secondary blocking effect on waterproofing. The combination of blocking and drainage in the waterproofing method has a significant rainproof effect and improves the service life of the device.

[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of implementation of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and all such improvements and modifications should be covered within the protection scope of this utility model.

Claims

1. A rotary drive with a U-shaped drainage channel, comprising: The enclosure comprises a housing (1), a worm gear (2), a cover plate (3), a sealing strip (5), a worm (6), and a base (7); the worm gear (2) and the worm (6) are disposed inside the housing (1), and the base (7) is disposed at the lower part of the housing (1); the worm gear (2) is horizontally nested inside the housing (1), and the length of the worm gear (2) is greater than the thickness of the housing (1); the worm gear (2) is fixed relative to the housing (1) by the cover plate (3); the cover plate (3) is disposed on the front side of the housing (1); The cover plate (3) includes a panel (31) and an integrally formed locking ring (32). The locking ring (32) is vertically disposed on the panel (31) and faces the interior of the housing (1). The panel (31) covers the concentric circular cross section formed by the worm gear (2) and the front side of the housing (1). The worm (6) is disposed below the worm gear (2), and the axial direction of the worm (6) is perpendicular to the axial direction of the worm gear (2) on the horizontal plane. The worm (6) and the worm gear (2) mesh with each other through their respective surface gears. Its features include a circumferential annular U-groove (10), a drainage hole (11), a flange (15), and a spiral drainage groove (16); A circumferential annular U-groove (10) is provided on the inner wall of the panel (31) near the inner ring. The annular outer wall of the circumferential annular U-groove (10) near the worm gear (2) is a panel engaging part (13). A flange (15) is machined on the circumference of the worm gear (2) that engages with the circumferential annular U-groove (10). The gap between the panel engaging part (13), the worm gear (2), and the flange (15) forms the spiral drainage groove (16). A drainage hole (11) is provided on the panel (31) at the location closest to the base (7) below the circumferential annular U-groove (10). The drainage hole (11) and the spiral drainage groove (16) are connected. A circumferential annular U-groove (10) is provided on the inner wall of the back of the housing (1). The annular outer wall of the circumferential annular U-groove (10) near the worm gear (2) is a housing engagement part (14). A flange (15) is machined on the circumference of the worm gear (2) that engages with the circumferential annular U-groove (10). The gap between the housing engagement part (14), the worm gear (2), and the flange (15) forms the spiral drainage groove (16). A drainage hole (11) is provided on the back of the housing (1) at the location closest to the base (7) below the circumferential annular U-groove (10). The drainage hole (11) and the spiral drainage groove (16) are connected.

2. A rotary drive with a U-shaped drainage groove according to claim 1, characterized in that, The annular U-groove (10) is inclined away from the worm gear (2) on its inner wall. The opening of the annular U-groove (10) facing the center of the worm gear (2) is smaller than the opening facing both ends of the worm gear (2).

3. A rotary drive with a U-shaped drainage groove according to claim 2, characterized in that, The angle between the inclined inner wall of the circumferential U-groove (10) and the horizontal line is 10°.

4. A rotary drive with a U-shaped drainage groove according to claim 1, characterized in that, The panel (31) is also provided with radially distributed screw holes (33), and is fixed to the housing (1) by bolts (35).

5. A rotary drive with a U-shaped drainage groove according to claim 1, characterized in that, The sealing strip (5) is provided on the outer side of the inner ring of the panel (31) where it contacts the worm gear (2); the sealing strip (5) is provided on the outer wall of the back of the housing (1) where it contacts the worm gear (2).

6. A rotary drive with a U-shaped drainage groove according to claim 5, characterized in that, The sealing strip (5) is a WT type sealing strip.

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