Defrosting gearbox

Abstract

The utility model relates to the field of transmission power elements, in particular to a defrosting gearbox. A defrosting gear box comprises a box body, an input device used for being connected with a power source, an output device used for being connected with blades and an autorotation driving device used for driving the box body to rotate, an input base shell and an input cover are arranged on the lower side of the box body, and the autorotation driving device comprises a gear frame arranged on the outer side of the input base shell in a sleeving mode. A self-rotating bearing is installed between the gear frame and the input base shell, the input cover is connected with a lower sealing ring which abuts against the inner side wall of the gear frame to form a sealing face, an upper sealing ring is arranged at the position, located above the self-rotating bearing, of the outer side wall of the input base shell, and the periphery of the upper sealing ring abuts against the upper side of the gear frame to form a sealing face. The gearbox drives the blades to rotate while achieving autorotation, so that the defrosting machine can drive large-range high-position airflow to sink to be mixed with low-position airflow to improve the surface temperature, and the autorotation bearing is also protected by the upper sealing ring and the lower sealing ring.

Description

Technical Field

[0001] The present application relates to the field of transmission power elements, and in particular to a defrost gearbox. Background Art

[0002] During colder nights and early mornings, the ground surface temperature can drop below zero, potentially harming plants due to frost. During this period, a temperature inversion occurs above the garden, where the air temperature about ten meters above the ground is higher than the ground itself. Existing technology uses a defrost machine to blow air from a higher altitude toward the ground, raising the ground temperature and reducing plant frost damage.

[0003] Previous defrosters blew air directly downward, which only affected a small area of ​​airflow and could only direct warm air downward in a small area. Subsequent improved defrost designs used a gearbox to achieve oblique blowing while simultaneously enabling the gearbox to rotate to change the blowing direction. This allowed the defrost to cause a large area of ​​high-altitude airflow to sink and mix with low-altitude airflow, covering a large area of ​​the garden. However, this gearbox has the following problems: the gearbox's self-rotating structure, which serves as the self-rotating bearing for the entire gearbox, has a large load-bearing capacity and size, and needs to prevent the lubricating oil in the bearing from evaporating, and protect the bearing from foreign matter that may affect its use. The current structure still has room for improvement. Utility Model Content

[0004] In order to achieve bearing protection for the gearbox rotation structure, the present application provides a defrosting gearbox.

[0005] This application provides a defrost gearbox, which adopts the following technical solution:

[0006] A defrost gearbox comprises a box body, an input device for connecting to a power source, an output device for connecting to blades, and a rotation drive device for driving the box body to rotate, an input seat shell and an input cover are provided on the lower side of the box body, the rotation drive device comprises a gear rack mounted on the outside of the input seat shell, a rotation bearing is installed between the gear rack and the input seat shell, a lower sealing ring is connected to the input cover and abuts against the inner side wall of the gear rack to form a sealing surface, an upper sealing ring is provided on the outer side wall of the input seat shell at a position above the rotation bearing, and the outer periphery of the upper sealing ring abuts against the upper side of the gear rack to form a sealing surface.

[0007] By adopting this technical solution, the autorotating bearing supports the load during housing rotation, and the lower and upper sealing rings form a sealed area enclosing the autorotating bearing. This prevents rapid evaporation of the autorotating bearing's lubricating oil and prevents the ingress of external dust and other particles. While both the upper and lower sealing rings will wear over long periods of operation, the wear and tear of the lower sealing ring prevents the entry of dust into the autorotating bearing. Furthermore, since the sealing surface between the upper sealing ring and the gear carrier is located above the gear carrier, this wear and tear also prevents the entry of dust into the autorotating bearing.

[0008] Preferably, an annular dovetail groove is formed on the outer wall of the input housing at a position above the rotation bearing, and the inner ring of the upper sealing ring is an embedded ring embedded in the dovetail groove.

[0009] By adopting the above technical solution, the upper sealing ring is installed and fixed by cooperating with the embedded ring of the inner ring and the dovetail groove.

[0010] Preferably, the upper sealing ring is inclined downward from the inside to the outside, the upper side surface of the gear rack is an inclined surface inclined downward from the inside to the outside, and the inclination angle of the upper sealing ring is greater than the inclination angle of the inclined surface.

[0011] By adopting the above technical solution, the upper surface of the gear frame is inclined downward from the inside to the outside, so that the powder after the upper sealing ring is worn leaves the gear frame through the inclined surface, and will not enter the rotating bearing and affect the operation of the bearing.

[0012] Preferably, the input device includes an input seat shell located on the lower side of the box body and fixedly connected to the box body, an input cover located at the lower end of the input seat shell, an input rotating shaft passing through the input seat shell and the input cover, an input bevel gear located at the upper end of the input rotating shaft, and input bearings for supporting both ends of the input rotating shaft; the output device includes an output rotating shaft for mounting blades, an output bevel gear fixed on the output rotating shaft and meshing with the input bevel gear, and output bearings located on both ends of the output rotating shaft on the box body for supporting the output rotating shaft.

[0013] By adopting the above technical solution, after the output end of the driving power element is connected to the input shaft and drives the input shaft to rotate, the input shaft transmits power through the cooperation of the input bevel gear and the output bevel gear to rotate the output shaft, and the rotation of the blades on the output shaft drives the airflow at high altitude to flow to the ground.

[0014] Preferably, the input seat housing is a rotating body, the upper end of the input seat housing extends into the box body, two input bearings are installed at the upper and lower ends of the inner wall of the input seat housing, the input rotating shaft passes through the two input bearings, and the position of the input rotating shaft near the lower end is threadedly connected with a bearing nut that abuts the inner ring of the input bearing.

[0015] By adopting the above technical solution, the input shaft is rotated around the axis through the input bearing, and the bearing nut cooperates to fix the relative position of the input shaft and the input bearing.

[0016] Preferably, the lower sealing ring, the input cover and the input seat housing are connected by bolts, and an input oil seal abutting against the input rotating shaft is provided on the inner side wall of the input cover.

[0017] By adopting the above technical solution, the installation of the lower sealing ring and the input cover is completed by bolts, and the input oil seal is used for rotational sealing.

[0018] Preferably, the self-rotation drive device also includes a transmission assembly located in the housing, which cooperates with the output shaft, transmits power, and drives the housing to transmit, the transmission assembly includes a first worm located on the output shaft, a first transmission shaft located in the housing and extending in the front-to-back direction, a first worm wheel located on the first transmission shaft and meshing with the first worm, a second worm located on the first transmission shaft, a second transmission shaft with one end located in the housing and the other end passing downwardly out of the housing, a second worm wheel located at the upper end of the second transmission shaft and meshing with the second worm, and a transmission gear located at the lower end of the second transmission shaft and meshing with the gear rack.

[0019] By adopting the above technical solution, when the output shaft rotates, the transmission shaft is driven to rotate through the cooperation of the first worm and the first worm wheel, and the transmission shaft drives the second transmission shaft to rotate through the cooperation of the second worm and the second worm wheel, and the second transmission shaft drives the transmission gear to rotate. Since the transmission gear is engaged with the teeth of the outer ring of the gear rack, the entire box rotates around the center of the gear rack, so that the direction of the airflow is constantly changing, driving a large range of high-altitude airflow to blow to the ground.

[0020] Preferably, a transmission bearing is sleeved on the second transmission shaft, and the transmission bearing is installed on the inner side wall of the box body, and a transmission seat shell is provided on the box body below the transmission bearing, and a circle of abutment ring is formed on the upper side wall of the transmission seat shell to abut the outer ring of the transmission bearing, the second transmission shaft passes through the transmission seat shell, and a transmission oil seal that fits the second transmission shaft is embedded on the inner wall of the transmission seat shell.

[0021] By adopting the above technical solution, the position between the second transmission shaft and the housing is sealed by the transmission oil seal, and the position of the transmission bearing is limited by the abutment ring.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The rotating bearing is used as the load support when the box rotates, and the lower sealing ring and the upper sealing ring are provided to form a sealing area to cover the rotating bearing, thereby preventing the lubricating oil of the rotating bearing from evaporating quickly and preventing external dust from entering the rotating bearing.

[0024] 2. The upper surface of the gear frame is inclined downward from the inside to the outside so that the powder after the upper sealing ring is worn will leave the gear frame through the inclined surface and will not enter the rotating bearing and affect the operation of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic cross-sectional view of an embodiment;

[0026] Figure 2 is a schematic structural diagram of an input device in an embodiment;

[0027] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0028] Explanation of the accompanying drawings: 1. Housing; 2. Input device; 3. Output device; 4. Rotation drive device; 5. Input seat housing; 6. Input cover; 7. Input shaft; 8. Input bevel gear; 9. Input bearing; 10. Bearing nut; 11. Input oil seal; 12. Output shaft; 13. Output bevel gear; 14. Output bearing; 15. Gear rack; 16. Transmission assembly; 17. Protective cover; 18. Rotation bearing; 19. Lower sealing ring; 20. Dovetail groove; 21. Upper sealing ring; 22. Embedded ring; 23. First worm; 24. First transmission shaft; 25. First worm gear; 26. Second worm; 27. Second transmission shaft; 28. Second worm gear; 29. ​​Transmission gear; 30. Transmission bearing; 31. Transmission seat housing; 32. Abutment ring; 33. Transmission oil seal. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] An embodiment of the present application provides a defrost gear box, and the "up", "down", "left", "right", "front" and "back" used in the embodiment are schematic diagrams used to describe the relative directions of the positional relationship, and are not limitations of the positional relationship.

[0031] like Figure 1 As shown, the defrost gearbox includes a box body 1, an input device 2 for connecting to a power source, an output device 3 for connecting to blades, and a self-rotation driving device 4 for driving the box body 1 to rotate.

[0032] like Figure 1 and Figure 2 As shown, the input device 2 includes an input housing 5 located on the lower side of the housing 1 and fixedly connected to the housing 1, an input cover 6 located at the lower end of the input housing 5, an input shaft 7 passing through the input housing 5 and the input cover 6, an input bevel gear 8 located at the upper end of the input shaft 7, and input bearings 9 for supporting both ends of the input shaft 7.

[0033] like Figure 1 and Figure 2 As shown, the input housing 5 is a rotating body, with its upper end extending into the housing 1. Two input bearings 9, both tapered roller bearings, are mounted on the upper and lower ends of the inner wall of the input housing 5. The input shaft 7 passes through the two input bearings 9. A bearing nut 10 is threadedly connected near the lower end of the input shaft 7, which abuts against the inner race of the lower input bearing 9 to retain the shaft in position. The input cover 6 is bolted to the input housing 5, and an input oil seal 11 is mounted on the inner wall of the cover 6.

[0034] like Figure 1 As shown, the output device 3 includes an output shaft 12 for mounting blades, an output bevel gear 13 fixed on the output shaft 12 and meshing with the input bevel gear 8, and output bearings 14 located at both ends of the output shaft 12 on the housing 1 for supporting the output shaft 12.

[0035] like Figure 1 and Figure 3 As shown, the rotation drive device 4 comprises a gear carrier 15 mounted on the outside of the input housing 5 and rotatably connected to the input housing 5; a transmission assembly 16 located within the housing 1 and cooperating with the output shaft 12 to transmit power and drive the housing 1. A protective cover 17 is mounted on the underside of the housing 1, enclosing the portion of the gear carrier 15 and transmission assembly 16 that extends outside the housing 1. A rotation bearing 18, utilizing a tapered roller bearing, is mounted between the gear carrier 15 and the input housing 5. A lower, annular rubber seal 19 is bolted to the input cover 6, forming a sealing surface against the inner wall of the gear carrier 15. An annular dovetail groove 20 is formed on the outer wall of the input housing 5, above the rotation bearing 18. This groove houses an upper rubber seal 21. The inner ring of this seal is an insert ring 22 that fits snugly into the groove. The seal 21 slopes downward from the inside out at an angle greater than 20 degrees. The outer side of the gear carrier 15 is formed with profiled teeth. The upper side of the gear carrier 15 slopes downward from the inside out at an angle of 5 to 10 degrees. The outer ring of the seal 21 abuts the upper side of the gear carrier 15, forming a seal.

[0036] like Figure 1 and Figure 3As shown, the transmission assembly 16 includes a first worm 23 located on the output shaft 12, a first transmission shaft 24 located in the housing 1 and extending in the front-to-back direction, a first worm wheel 25 located on the first transmission shaft 24 and meshing with the first worm 23, a second worm 26 located on the first transmission shaft 24, a second transmission shaft 27 with one end located in the housing 1 and the other end extending downwardly out of the housing 1, a second worm wheel 28 located at the upper end of the second transmission shaft 27 and meshing with the second worm 26, and a transmission gear 29 located at the lower end of the second transmission shaft 27 and meshing with the gear rack 15. A transmission bearing 30 is sleeved on the second transmission shaft 27 and mounted on the inner side wall of the housing 1. A transmission housing 31 is provided on the housing 1 below the transmission bearing 30. The transmission housing 31 is connected to the housing 1 by bolts, and an abutment ring 32 is formed on the upper side wall of the transmission housing 31 to abut the outer ring of the transmission bearing 30. The second transmission shaft 27 passes through the transmission housing 31 , and a transmission oil seal 33 is embedded on the inner wall of the transmission housing 31 to fit the second transmission shaft 27 .

[0037] Specific usage process:

[0038] After the defrost gearbox is installed, the gear rack 15 is fixedly connected to the mounting plate. The output end of the drive power element is connected to the input shaft 7 and drives the input shaft 7 to rotate. The input shaft 7 transmits power through the cooperation of the input bevel gear 8 and the output bevel gear 13, causing the output shaft 12 to rotate. The blades on the output shaft 12 rotate, driving the airflow from the upper part to the ground.

[0039] When the output shaft 12 rotates, the transmission shaft is driven to rotate through the cooperation of the first worm 23 and the first worm wheel 25. The transmission shaft drives the second transmission shaft 27 to rotate through the cooperation of the second worm 26 and the second worm wheel 28. The second transmission shaft 27 drives the transmission gear 29 to rotate. Since the transmission gear 29 is engaged with the teeth on the outer ring of the gear rack 15, the entire box body 1 rotates around the center of the gear rack 15, causing the direction of the airflow to change continuously, driving a large range of high-altitude airflow to blow to the ground.

[0040] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A defrost gearbox, comprising a housing (1), an input device (2) for connecting to a power source, an output device (3) for connecting to blades, and a self-rotation drive device (4) for driving the housing (1) to rotate, wherein an input housing (5) and an input cover (6) are provided on the lower side of the housing (1), and the gearbox is characterized in that: The self-rotation drive device (4) comprises a gear frame (15) sleeved on the outside of an input housing (5); a self-rotation bearing (18) is installed between the gear frame (15) and the input housing (5); a lower sealing ring (19) is connected to the input cover (6) and abuts against the inner wall of the gear frame (15) to form a sealing surface; an upper sealing ring (21) is provided on the outer wall of the input housing (5) above the self-rotation bearing (18); the outer periphery of the upper sealing ring (21) abuts against the upper side of the gear frame (15) to form a sealing surface.

2. The defrost gearbox according to claim 1, characterized in that: An annular dovetail groove (20) is formed on the outer wall of the input housing (5) above the rotation bearing (18), and the inner ring of the upper sealing ring (21) is an embedded ring (22) embedded in the dovetail groove (20).

3. The defrost gear box according to claim 1 or 2, characterized in that: The upper sealing ring (21) is inclined downward from the inside to the outside, and the upper side surface of the gear frame (15) is an inclined surface inclined downward from the inside to the outside, and the inclination angle of the upper sealing ring (21) is greater than the inclination angle of the inclined surface.

4. The defrost gear box according to claim 1, characterized in that: The input device (2) comprises an input housing (5) located on the lower side of the housing (1) and fixedly connected to the housing (1), an input cover (6) located at the lower end of the input housing (5), an input rotating shaft (7) passing through the input housing (5) and the input cover (6), an input bevel gear (8) located at the upper end of the input rotating shaft (7), and input bearings (9) for supporting both ends of the input rotating shaft (7); the output device (3) comprises an output rotating shaft (12) for mounting blades, an output bevel gear (13) fixed on the output rotating shaft (12) and meshing with the input bevel gear (8), and output bearings (14) located on the housing (1) at both ends of the output rotating shaft (12) for supporting the output rotating shaft (12).

5. The defrost gear box according to claim 4, characterized in that: The input housing (5) is a rotating body. The upper end of the input housing (5) extends into the housing (1). Two input bearings (9) are installed at the upper and lower ends of the inner wall of the input housing (5). The input rotating shaft (7) passes through the two input bearings (9). A bearing nut (10) is threadedly connected near the lower end of the input rotating shaft (7) and abuts against the inner ring of the input bearing (9).

6. The defrost gear box according to claim 5, characterized in that: The lower sealing ring (19), the input cover (6) and the input seat housing (5) are connected by bolts, and an input oil seal (11) abutting against the input rotating shaft (7) is provided on the inner side wall of the input cover (6).

7. The defrost gear box according to claim 4, characterized in that: The self-rotation drive device (4) further comprises a transmission assembly (16) located in the housing (1) and cooperating with the output rotating shaft (12) to transmit power and drive the housing (1) for transmission. The transmission assembly (16) comprises a first worm (23) located on the output rotating shaft (12), a first transmission shaft (24) located in the housing (1) and extending in the front-rear direction, a first worm wheel (25) located on the first transmission shaft (24) and meshing with the first worm (23), a second worm (26) located on the first transmission shaft (24), a second transmission shaft (27) with one end located in the housing (1) and the other end extending downwardly out of the housing (1), a second worm wheel (28) located at the upper end of the second transmission shaft (27) and meshing with the second worm (26), and a transmission gear (29) located at the lower end of the second transmission shaft (27) and meshing with the gear rack (15).

8. The defrost gear box according to claim 7, characterized in that: A transmission bearing (30) is sleeved on the second transmission shaft (27), and the transmission bearing (30) is mounted on the inner wall of the box body (1). A transmission seat shell (31) is provided on the box body (1) below the transmission bearing (30). An abutting ring (32) is formed on the upper side wall of the transmission seat shell (31) to abut against the outer ring of the transmission bearing (30). The second transmission shaft (27) passes through the transmission seat shell (31), and a transmission oil seal (33) that fits the second transmission shaft (27) is embedded on the inner wall of the transmission seat shell (31).

Images