Gearbox with self-filtering function

Abstract

The gearbox with the self-filtering function comprises a box body, a gear set, an output shaft and an input shaft, the output shaft and the input shaft are rotationally connected with the upper end and the lower end of the box body, the gear set is arranged in the box body and used for transmitting torque of the input shaft to the output shaft, and the gear set is arranged in the box body and used for transmitting torque of the input shaft to the output shaft. An oil filling hole and an oil discharging hole are formed in the box body, the device further comprises a filter box, propeller blades, a first transmission shaft and a second transmission shaft, the filter box is arranged at the bottom of the box body, the filter box and the bottom face of the box body are arranged in a spaced mode, and a channel communicating the upper side and the lower side of the filter box is formed in the outer side of the filter box; a liquid inlet is formed in the top of the filter box; the first transmission shaft is vertically arranged above the liquid inlet, and the first transmission shaft is rotationally connected with the inner wall of the box body; and the propeller blades are fixedly arranged at the bottom end of the first transmission shaft. The problem that a filtering structure in the gearbox is too complex is solved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gearboxes, and in particular to a gearbox with a self-filtering function. Background Art

[0002] In the field of mechanical transmission, gearboxes, as a key transmission component, are widely used in various mechanical devices, varying the speed and torque of the output shaft to meet the requirements of various operating conditions. Traditional gearboxes typically consist of basic components such as a housing, a gear train, an output shaft, and an input shaft. The gear train transmits torque from the input shaft to the output shaft, achieving speed and torque conversion. However, during actual operation, contaminants such as metal particles and impurities are generated within the gearbox due to factors such as gear meshing and bearing friction. These contaminants circulate within the gearbox along with the lubricating oil, accelerating gear and bearing wear and reducing its service life. They can also cause malfunctions and affect the normal operation of the equipment. Therefore, filtering the lubricating oil within the gearbox to remove contaminants is a crucial measure to ensure gearbox performance and extend its service life. Currently, some gearboxes with filtering functions are available on the market, but most of these filtering devices are complex, making installation and maintenance difficult. Some filtering devices require an additional power source to operate the filtering components, increasing the overall energy consumption and manufacturing cost of the gearbox. Therefore, further optimization of the gearbox is required. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a gearbox with a self-filtering function, which solves the problem in the prior art that the filtering structure in the gearbox is too complicated and the cost is high.

[0004] According to an embodiment of the present invention, a gearbox with a self-filtering function includes a housing, a gear set, an output shaft and an input shaft, the output shaft, the input shaft and the upper and lower ends of the housing are rotatably connected, the gear set is arranged in the housing for transmitting the torque of the input shaft to the output shaft, the housing is provided with a refueling hole and an oil drain hole, and also includes a filter box, a propeller blade, a first transmission shaft and a second transmission shaft, the filter box is arranged at the bottom of the housing and is spaced from the bottom surface of the housing, a channel connecting the upper and lower sides of the filter box is provided on the outside of the filter box, and a liquid inlet and a liquid outlet are respectively provided on the top and bottom of the filter box; the first transmission shaft is vertically arranged above the liquid inlet, and the first transmission shaft is rotatably connected to the inner wall of the housing; the propeller blade is fixedly arranged at the bottom end of the first transmission shaft; the second transmission shaft is horizontally arranged and perpendicular to the input shaft and the first transmission shaft, and the two ends of the second transmission shaft are respectively connected to the input shaft and the first transmission shaft using a bevel gear transmission structure.

[0005] The technical principle of the present invention is that the propeller blades are driven to rotate by the input shaft on the gearbox, so that the lubricating fluid in the gearbox circulates into the filter box.

[0006] Preferably, a stainless steel filter screen is provided at the bottom of the filter box, and the stainless steel filter screen is covered with filter cloth; the stainless steel filter screen is tilted downward on the side away from the liquid inlet and is provided with a slag discharge port, and the bottom of the slag discharge port is fixedly connected to a storage box; a cleaning plate is slidingly provided inside the filter box, and the bottom surface of the cleaning plate is in contact with the filter cloth; a threaded hole is provided on one side of the cleaning plate, and a closable first through hole is provided on the box body at a position corresponding to the threaded hole; the open end of the threaded hole is provided with a chamfer to facilitate the introduction of the screw.

[0007] Preferably, a first bevel gear is fixedly provided on the input shaft, a second bevel gear is fixedly provided on one end of the second transmission shaft, a third bevel gear is fixedly provided on the other end of the second transmission shaft, a fourth bevel gear is fixedly provided on the first transmission shaft, the first bevel gear and the second bevel gear are meshed, and the third bevel gear and the fourth bevel gear are meshed.

[0008] Preferably, a spiral blade is fixedly provided on the first transmission shaft, a gap is provided between the bottom end of the spiral blade and the propeller blade, the spiral blade and the propeller blade have opposite rotation directions, the top end of the spiral blade extends upward to the position corresponding to the output shaft, an oil guide sleeve is provided on the outer sleeve of the spiral blade, the oil guide sleeve is fixedly connected to the inside of the casing, the length of the oil guide sleeve is consistent with the length of the spiral blade, the top end of the oil guide sleeve is in a closed state, and an oil spray port is provided on the top end of the side wall of the oil guide sleeve facing the output shaft; a connecting unit is provided between the first transmission shaft and the fourth bevel gear.

[0009] Preferably, the connecting unit includes a plurality of connecting rods, a partition is provided on the oil guide sleeve, the partition is sealed and rotatably connected to both ends of the fourth bevel gear, a through hole consistent with the inner diameter of the oil guide sleeve is provided in the center of the fourth bevel gear, the connecting rod is arranged around the first transmission shaft, one end of the connecting rod is fixedly connected to the central axis of the spiral blade, and the other end of the connecting rod is fixedly connected to the inner wall of the through hole; the spiral blade is provided with a plurality of second through holes through which the connecting rod passes.

[0010] Preferably, a plurality of connecting rods are provided along the axis of the oil guide sleeve.

[0011] Preferably, a trumpet sleeve with an opening facing upward is fixedly provided on the top of the liquid inlet.

[0012] Preferably, two opposite sides of the filter box are provided with sliding grooves with opposite openings, and the two sides of the cleaning plate are adapted to the sliding grooves; and the bottom surface of the cleaning plate is provided with bristles or a plurality of scrapers.

[0013] Preferably, a detachable bottom plate is provided at the bottom of the box.

[0014] The filter cloth is a composite structure of a polyester fiber layer and a nylon industrial cloth, and the stacking order is the polyester fiber layer at the bottom and the nylon industrial cloth at the top.

[0015] Compared to existing technologies, the present invention offers the following advantages: By installing components such as a filter box, propeller blades, and first and second transmission shafts within the transmission, a self-filtering function is achieved within the transmission. This design eliminates the need for additional filtering equipment or power sources, reducing system complexity and cost. The existing power transmission path within the transmission is utilized to drive the propeller blades to rotate, thereby driving the lubricating oil through the filter box for filtration. This design effectively utilizes power and avoids energy waste. The rotation of the propeller blades generates a flowing lubricating oil flow, promoting its circulation and filtration within the filter box. This design helps improve filtration efficiency and ensures the effective removal of impurities and contaminants in the lubricating oil. The filter box is located at the bottom of the transmission housing, spaced a certain distance from the bottom surface, and has connecting channels on its sides to facilitate the flow and filtration of the lubricating oil. Furthermore, the entire self-filtration system features a compact design, does not occupy excessive space, and is easy to install and maintain. By regularly filtering impurities and contaminants from the lubricating oil, wear on gears and bearings is reduced, thereby extending the service life of the transmission. This helps reduce equipment maintenance costs and downtime, thereby improving production efficiency. Clean lubricating oil helps maintain good lubrication conditions inside the gearbox and reduces failures caused by poor lubrication. This helps improve the operating stability of the gearbox and ensures long-term reliable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the connection between the fourth bevel gear and the oil guide pipe of the present invention.

[0018] In the above drawings: 1. Box body; 2. Output shaft; 3. Input shaft; 4. First transmission shaft; 5. Spiral blade; 6. Oil guide sleeve; 7. Propeller blade; 8. Fourth bevel gear; 9. Third bevel gear; 10. Second transmission shaft; 11. Second bevel gear; 12. First bevel gear; 13. Filter box; 14. Filter cloth; 15. Cleaning plate; 16. Storage box; 17. Connecting rod; 18. First connecting block; 19. Second connecting block. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, an embodiment of the present invention proposes a gearbox with a self-filtering function, including a housing 1, a gear set, an output shaft 2 and an input shaft 3, the output shaft 2 and the input shaft 3 corresponding to each other in the vertical direction, the output shaft 2 and the input shaft 3 are parallel to each other and arranged horizontally, the output shaft 2 and the input shaft 3 correspond to each other up and down, the output shaft 2, the input shaft 3 are sealed and rotatably connected to the side wall of the housing 1, one end of the output shaft 2 and the input shaft 3 is arranged inside the housing 1, and the other end extends to the outside of the housing 1, the gear set is arranged in the housing 1 for transmitting the torque of the input shaft 3 to the output shaft 2, the housing 1 is provided with a refueling hole and an oil drain hole, the gear set includes a plurality of gears, the gears are rotatably connected to the housing 1, and the gear set is used to achieve deceleration and torque increase. The present invention also includes a filter box 13, propeller blades 7, a first transmission shaft 4 and a second transmission shaft 10. The filter box 13 is arranged at the bottom of the housing 1 and is spaced apart from the bottom surface of the housing 1. A channel is provided on the outside of the filter box 13 to connect the upper and lower sides of the filter box 13. The top and bottom of the filter box 13 are respectively provided with a liquid inlet and a liquid outlet. The first transmission shaft 4 is vertically arranged above the liquid inlet and is rotatably connected to the inner wall of the housing 1. The propeller blades 7 are fixedly arranged at the bottom end of the first transmission shaft 4. The second transmission shaft 10 is horizontally arranged and perpendicular to the input shaft 3 and the first transmission shaft 4. The two ends of the second transmission shaft 10 are respectively connected to the input shaft 3 and the first transmission shaft 4 using a bevel gear transmission structure. When the lubricating oil enters the interior of the filter box 13 from the top liquid inlet of the filter box 13, the lubricating oil is discharged from the bottom surface of the filter box 13 and then flows upward from the channel to the vicinity of the gear set. When the gearbox is working, the first transmission shaft 4 drives the propeller blades 7 to rotate. The suction or thrust generated by the propeller blades causes the lubricating oil to flow to the liquid inlet of the filter box 13, so that impurities such as iron filings in the lubricating oil are intercepted by the filter material.

[0021] Preferably, the bottom of the filter box 13 is provided with a stainless steel filter screen covered with a filter cloth 14. The stainless steel filter screen is tilted downward on the side away from the liquid inlet and is provided with a slag discharge port. A storage box 16 is fixedly connected to the bottom of the slag discharge port. A cleaning plate 15 is slidably mounted within the filter box 13, with the bottom surface of the cleaning plate 15 in contact with the filter cloth 14. One side of the cleaning plate 15 is provided with a threaded hole, and the housing 1 is provided with a closable first through-hole at a position corresponding to the threaded hole. The open end of the threaded hole is chamfered to facilitate the insertion of a screw. After the gearbox has been in use for an extended period, the lubricating oil in the gearbox is first drained, and the first through-hole is opened. A worker then inserts a threaded push rod through the first through-hole and aligns it with the threaded hole. The worker rotates the push rod to connect it to the threaded hole. The worker then reciprocates the push rod, causing the cleaning plate 15 to push impurities on the top surface of the filter cloth toward the slag discharge port and into the storage box 16. To clean sediment from the top surface of the filter cloth 14, the cleaning plate 15 can be simply pushed slowly.

[0022] Preferably, a first bevel gear 12 is fixedly provided on the input shaft 3, a second bevel gear 11 is fixedly provided on one end of the second transmission shaft 10, a third bevel gear 9 is fixedly provided on the other end of the second transmission shaft 10, a fourth bevel gear 8 is fixedly provided on the first transmission shaft 4, the first bevel gear 12 and the second bevel gear 11 are meshed, and the third bevel gear 9 is meshed with the fourth bevel gear 8. In this embodiment, a plurality of first connecting blocks 18 and second connecting blocks 19 are fixedly provided on the side wall of the housing 1, the first connecting blocks 18 and the second connecting blocks 19 are rotationally connected to the first transmission shaft 4 and the second transmission shaft 10, respectively, and the first transmission shaft 4 and the second transmission shaft 10 are provided with shaft shoulders, retaining rings and other limiting structures for axial positioning.

[0023] Preferably, a spiral blade 5 is fixedly mounted on the first transmission shaft 4. A space is provided between the base of the spiral blade 5 and the propeller blade 7. The spiral blade 5 and the propeller blade 7 rotate in opposite directions, and the top of the spiral blade 5 extends upward to a position corresponding to the output shaft 2. An oil guide sleeve 6 is positioned over the spiral blade 5, fixedly connected to the interior of the housing 1. The length of the oil guide sleeve 6 matches that of the spiral blade 5. An oil spray port is provided on the top sidewall of the oil guide sleeve 6, facing the output shaft 2. A connecting unit is provided between the spiral blade 5 and the fourth bevel gear 8. In this embodiment, when the input shaft 3 rotates the first transmission shaft 4 via the second transmission shaft 10, the spiral blade 5 on the first transmission shaft 4 transports some lubricating oil upward along the oil guide sleeve 6. The lubricating oil is then sprayed out from the oil spray port above the oil guide sleeve 6, improving the lubrication coverage. Typically, lubricating oil only covers the lowermost gear, transmitting the lubricating oil through the meshing of the gears. The oil guide sleeve 6 sprays the lubricating oil above the housing 1, improving lubrication efficiency. At the same time, the propeller blades 7 at the bottom end of the first transmission shaft 4 rotate, pushing the lubricating oil downward toward the filter box 13, filtering impurities in the lubricating oil. In this embodiment, the oil guide sleeve 6 is provided with an annular top cover, which is sealed and rotatably connected to the first transmission shaft 4. A gap is provided between the top of the propeller blades 5 and the annular top cover.

[0024] Preferably, the connection unit includes a plurality of connecting rods 17. A partition is provided on the oil guide sleeve 6. The partition is sealed and rotatably connected to both ends of the fourth bevel gear 8. A through hole having the same inner diameter as the oil guide sleeve 6 is provided in the center of the fourth bevel gear 8. The connecting rods 17 are arranged around the first transmission shaft 4. One end of the connecting rod 17 is fixedly connected to the central axis of the spiral blade 5, and the other end of the connecting rod 17 is fixedly connected to the inner wall of the through hole. The spiral blade 5 is provided with a plurality of second through holes through which the connecting rods 17 pass. In this embodiment, the fourth bevel gear 8 is fixedly connected to the first transmission shaft 4 without affecting the passage of lubricating oil through the oil guide sleeve 6. The outer diameter of the spiral blade 5 is adapted to the through hole.

[0025] Preferably, a plurality of connecting rods 17 are provided along the axis of the oil guide sleeve 6 , and the number of connecting rods 17 is increased to improve the strength between the fourth bevel gear 8 and the first transmission shaft 4 .

[0026] Preferably, a trumpet sleeve with an upward opening is fixedly provided on the top of the liquid inlet, so that more lubricating oil can be pushed into the filter box 13 by the propeller blades 7.

[0027] Preferably, the filter box 13 is provided with sliding grooves with opposing openings on opposite sides, and the two sides of the cleaning plate 15 are adapted to fit within the sliding grooves. The bottom surface of the cleaning plate 15 is provided with bristles or a plurality of scrapers. The sliding grooves serve as a guide, ensuring that the cleaning plate 15 and the filter cloth 14 are always in contact.

[0028] Preferably, a detachable bottom plate is provided at the bottom of the box body 1, and the staff can perform maintenance on the gear set after removing the bottom plate.

[0029] Preferably, the filter cloth is a composite structure of a polyester fiber layer and a nylon industrial cloth, with the polyester fiber layer at the bottom and the nylon industrial cloth at the top. When the brush or scraper passes over the nylon, pollutants can be easily carried away or cleaned.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A gearbox with a self-filtering function, comprising a housing (1), a gear set, an output shaft (2) and an input shaft (3), wherein the output shaft (2), the input shaft (3) and the housing (1) are rotatably connected at their upper and lower ends, the gear set is arranged in the housing (1) for transmitting the torque of the input shaft (3) to the output shaft (2), and the housing (1) is provided with an oil filling hole and an oil drain hole, characterized in that: The invention also includes a filter box (13), a propeller blade (7), a first transmission shaft (4) and a second transmission shaft (10), wherein the filter box (13) is arranged at the bottom of the box body (1) and is spaced apart from the bottom surface of the box body (1), a channel is arranged on the outside of the filter box (13) to communicate with the upper and lower sides of the filter box (13), and a liquid inlet and a liquid outlet are respectively arranged on the top and bottom of the filter box (13); the first transmission shaft (4) is vertically arranged above the liquid inlet, and the first transmission shaft (4) is rotatably connected to the inner wall of the box body (1); the propeller blade (7) is fixedly arranged at the bottom end of the first transmission shaft (4); the second transmission shaft (10) is horizontally arranged and perpendicular to the input shaft (3) and the first transmission shaft (4), and the two ends of the second transmission shaft (10) are respectively connected to the input shaft (3) and the first transmission shaft (4) using a bevel gear transmission structure.

2. The gearbox with self-filtering function according to claim 1, characterized in that: A stainless steel filter screen is provided at the bottom of the filter box (13), and the stainless steel filter screen is covered with a filter cloth (14); the stainless steel filter screen is tilted downward on the side away from the liquid inlet and is provided with a slag discharge port, and the bottom of the slag discharge port is fixedly connected to a storage box (16); a cleaning plate (15) is slidably provided inside the filter box (13), and the bottom surface of the cleaning plate (15) is in contact with the filter cloth (14); a threaded hole is provided on one side of the cleaning plate (15), and a closable first through hole is provided on the box body (1) at a position corresponding to the threaded hole; the open end of the threaded hole is provided with a chamfer to facilitate the introduction of the screw.

3. The gearbox with self-filtering function according to claim 1, characterized in that: A first bevel gear (12) is fixedly provided on the input shaft (3), a second bevel gear (11) is fixedly provided on one end of the second transmission shaft (10), a third bevel gear (9) is fixedly provided on the other end of the second transmission shaft (10), a fourth bevel gear (8) is fixedly provided on the first transmission shaft (4), the first bevel gear (12) and the second bevel gear (11) are meshed, and the third bevel gear (9) and the fourth bevel gear (8) are meshed.

4. A gearbox with a self-filtering function as claimed in claim 3, characterized in that: A spiral blade (5) is fixedly provided on the first transmission shaft (4), a gap is provided between the bottom end of the spiral blade (5) and the propeller blade (7), the spiral blade (5) and the propeller blade (7) have opposite rotation directions, the top end of the spiral blade (5) extends upward to the position corresponding to the output shaft (2), an oil guide sleeve (6) is provided on the outer shell of the spiral blade (5), the oil guide sleeve (6) is fixedly connected to the inside of the housing (1), the length of the oil guide sleeve (6) is consistent with the length of the spiral blade (5), and an oil injection port is provided on the top end of the side wall of the oil guide sleeve (6) on the side facing the output shaft (2); a connecting unit is provided between the first transmission shaft (4) and the fourth bevel gear (8).

5. The gearbox with self-filtering function according to claim 4, characterized in that: The connecting unit includes a plurality of connecting rods (17), a partition is provided on the oil guide sleeve (6), and the partition is sealed and rotatably connected to both ends of the fourth bevel gear (8). A through hole having the same inner diameter as the oil guide sleeve (6) is provided at the center of the fourth bevel gear (8). The connecting rod (17) is arranged around the first transmission shaft (4), one end of the connecting rod (17) is fixedly connected to the central axis of the spiral blade (5), and the other end of the connecting rod (17) is fixedly connected to the inner wall of the through hole; the spiral blade (5) is provided with a plurality of second through holes through which the connecting rod (17) passes.

6. The gearbox with self-filtering function according to claim 5, characterized in that: A plurality of connecting rods (17) are provided along the axis of the oil guide sleeve (6).

7. The gearbox with self-filtering function according to claim 1, characterized in that: A trumpet sleeve with an upward opening is fixedly provided on the top of the liquid inlet.

8. The gearbox with self-filtering function according to claim 2, characterized in that: The filter box (13) is provided with sliding grooves with opposite openings on two opposite sides, and the two sides of the cleaning plate (15) are adapted to the sliding grooves; the bottom surface of the cleaning plate (15) is provided with brushes or a plurality of scrapers.

9. The gearbox with self-filtering function according to claim 1, characterized in that: The bottom of the box body (1) is provided with a detachable bottom plate.

10. The gearbox with self-filtering function according to claim 2, characterized in that: The filter cloth is a composite structure of a polyester fiber layer and a nylon industrial cloth, and the stacking order is the polyester fiber layer at the bottom and the nylon industrial cloth at the top.

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