Compact gear reducer

Abstract

The invention discloses a compact gear speed reducer which comprises a machine shell, and a first rotating shaft is rotationally arranged in the machine shell. The compact gear speed reducer has the beneficial effects that by arranging a second bevel gear and a first bevel gear, when the output end of a first motor drives the second rotating shaft and the second bevel gear to rotate, the output end of the first motor drives the second rotating shaft and the second bevel gear to rotate; a first bevel gear is arranged, a second bevel gear can drive a meshed first bevel gear to rotate, the second bevel gear drives the first bevel gear to rotate, the speed reduction effect is completed, and speed reduction treatment is carried out, and a first small gear, a second large gear, a second small gear, a transmission gear and a third large gear are arranged; a first small gear drives a second large gear to rotate when rotating, speed reduction is completed, then the second large gear drives the second small gear to rotate through a third rotating shaft, the second small gear drives a third large gear to rotate through a transmission gear, and speed reduction work is further completed. And a fifth rotating shaft on the inner side of the third large gear drives the output shaft to rotate.

Description

Technical Field

[0001] The invention relates to the technical field of gear reducers, in particular to a compact gear reducer. Background Art

[0002] A reducer is a power transmission mechanism, which is mainly used to reduce the speed of the input shaft and increase the torque to meet different application requirements. The reducer uses a gear transmission, worm transmission or gear-worm transmission enclosed in a rigid housing to reduce the number of revolutions of the motor (motor) or other prime mover to the required number of revolutions and obtain a larger torque. It plays a vital role in modern machinery, especially in transmission equipment that requires low speed and high torque. The gear reducer is a widely used force transmission device. Its working principle is mainly to use various levels of gear transmission to achieve the purpose of speed reduction, while increasing torque and reducing inertia. Specifically, the gear reducer inputs power to the input shaft of the reducer through an electric motor, an internal combustion engine or other high-speed power source, and the small gear on the input shaft meshes with the large gear on the output shaft to achieve a deceleration effect. This deceleration effect is achieved through the transmission of multiple gear pairs, and each gear pair will further reduce the speed and increase the torque. Gear reducers are also widely used in aerospace, transportation, and power industries. In the aerospace field, it is often used for power transmission and speed control of aircraft engines; in the field of transportation, such as cars, trains and ships, gear reducers convert the high-speed rotation of the engine into the actual speed and torque required by the drive wheel; in the electric power industry, it is used in the variable frequency speed regulation systems of generators such as gas turbines, wind power and hydropower to achieve optimal power generation efficiency, but the various gear sets in the existing gear reducers do not have the function of automatic oil replenishment and lubrication. During use, the surface movement of the gears will generate friction, which will cause it to generate noise, and it is also not conducive to the long-term use of the reducer. After the gear reducer has been used for a long time, it is necessary to manually open the reducer housing and replenish oil. Summary of the invention

[0003] The object of the present invention is to provide a compact gear reducer to solve the problem that the various gear sets in the existing gear reducers mentioned in the above background technology do not have the function of automatic oil replenishment and lubrication, and the surface movement of the gears during use will generate friction, which in turn causes noise, and is also not conducive to the long-term use of the reducer. After the gear reducer has been used for a long time, it is necessary to manually open the reducer housing and replenish oil.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a compact gear reducer, comprising a casing, wherein a first rotating shaft is rotatably arranged inside the casing, a first bevel gear is fixedly connected to the outer side of the first rotating shaft, a second bevel gear is rotatably arranged inside the casing, the second bevel gear is meshingly connected with the first bevel gear, a first pinion gear is fixedly connected to the outer side of the first rotating shaft, a third rotating shaft is rotatably connected inside the casing, a second large gear matched with the first pinion gear is fixedly connected to the outer side of the third rotating shaft, the second large gear is meshingly connected with the first pinion gear, a second pinion gear is fixedly connected to the outer side of the third rotating shaft, and a fourth rotating shaft is rotatably connected inside the casing, The outer side of the No. 4 rotating shaft is fixedly connected with a transmission gear, and the transmission gear is meshed with the No. 2 small gear. The interior of the casing is rotatably connected with the No. 5 rotating shaft, and the outer side of the No. 5 rotating shaft is fixedly connected with the No. 3 large gear, and the No. 3 large gear is meshed with the transmission gear. One side of the casing is rotatably connected with an output shaft, and one end of the output shaft is fixedly connected to the No. 5 rotating shaft. The interior of the casing is fixedly connected with a No. 1 lubricating oil nozzle that cooperates with the No. 3 large gear, the transmission gear and the No. 2 small gear. The interior of the casing is fixedly connected with a No. 2 lubricating oil nozzle that cooperates with the No. 1 small gear and the No. 2 large gear. The interior of the casing is fixedly connected with a No. 3 lubricating oil nozzle that cooperates with the No. 1 bevel gear and the No. 2 bevel gear.

[0005] As a preferred solution of the present invention: the bottom of the casing is fixedly connected to a supporting base, the interior of the supporting base is fixedly connected to a collecting box, a plurality of collecting ports are opened inside the casing, the collecting ports are communicated with the collecting box, the interior of the supporting base is fixedly connected to an oil passing tank, the collecting box and the oil passing tank are connected by a pipeline, the bottom of the oil passing tank is fixedly connected to an oil drain pipe, the oil drain pipe is fixedly connected to the supporting base, and the interior of the oil drain pipe is fixedly connected to a filter mesh plate.

[0006] As a preferred solution of the present invention: an oil pump is installed inside the support base, the input end of the oil pump is connected to the oil tank through a pipeline, the output end of the oil pump is fixedly connected to an oil pipeline, and the oil pipeline is fixedly connected to the support base.

[0007] As a preferred solution of the present invention: the top of the casing is fixedly connected to an oil inlet tank, the top of the oil inlet tank is fixedly connected to an oil inlet pipe, and one end of the oil delivery pipe is fixedly connected to the oil inlet tank.

[0008] As a preferred solution of the present invention: oil pumps are installed inside the No. 1 lubricating oil nozzle, No. 2 lubricating oil nozzle and No. 3 lubricating oil nozzle, and the oil inlet tank is connected to the oil pumps in the No. 1 lubricating oil nozzle, No. 2 lubricating oil nozzle and No. 3 lubricating oil nozzle through pipelines.

[0009] As a preferred solution of the present invention: a scraper is rotatably provided on one side of the filter mesh disk, a connecting side box is fixedly connected to the side of the filter mesh disk away from the scraper, a rotating rod is rotatably connected to the inside of the connecting side box, one end of the rotating rod is fixedly connected to the scraper, and the rotating rod is rotatably connected to the filter mesh disk.

[0010] As a preferred solution of the present invention: a worm is rotatably connected inside the connecting side box, the worm is rotatably connected to the oil tank, a worm wheel is fixedly connected to the outside of the rotating rod, and the worm wheel is meshingly connected to the worm.

[0011] As a preferred solution of the present invention: a No. 2 motor is installed on the top of the oil tank, and the output end of the No. 2 motor is fixedly connected to the worm.

[0012] As a preferred solution of the present invention: a second rotating shaft is rotatably connected inside the housing, and one end of the second rotating shaft is fixedly connected to a second bevel gear.

[0013] As a preferred solution of the present invention: a No. 1 motor is installed inside the housing, and an output end of the No. 1 motor is fixedly connected to a No. 2 rotating shaft.

[0014] Compared with the prior art, the invention has the following beneficial effects: by setting a No. 2 bevel gear and a No. 1 bevel gear, the invention realizes that when the output end of the No. 1 motor drives the No. 2 rotating shaft and the No. 2 bevel gear to rotate, the No. 2 bevel gear will drive the meshing No. 1 bevel gear to rotate, and the No. 2 bevel gear drives the No. 1 bevel gear to rotate to complete the deceleration effect, and performs deceleration processing; by setting a No. 1 small gear, a No. 2 large gear, a No. 2 small gear, a transmission gear and a No. 3 large gear, the invention realizes that when the No. 1 small gear rotates, it drives the No. 2 large gear to rotate, and completes the deceleration; then the No. 2 large gear drives the No. 2 small gear to rotate through the No. 3 rotating shaft, and the No. 2 small gear drives the No. 3 large gear to rotate through the transmission gear, and further completes the deceleration work; the output shaft is driven to rotate through the No. 5 rotating shaft inside the No. 3 large gear, and the output is rotated through the output shaft; by setting a No. 1 lubricating oil nozzle, a No. 2 lubricating oil nozzle and a No. 3 lubricating oil nozzle, it is realized that the meshing positions between the gears are replenished with oil, and multiple gears are replenished with oil and lubricated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the position structure of the lubricating oil nozzle of the present invention;

[0017] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 4For the present invention Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 For the present invention Figure 4 Enlarged view of point B in the middle.

[0020] In the figure: 1. casing; 2. supporting base; 3. collecting box; 4. collecting port; 5. rotating shaft No. 1; 6. bevel gear No. 1; 7. small gear No. 1; 8. rotating shaft No. 2; 9. bevel gear No. 2; 10. motor No. 1; 11. rotating shaft No. 3; 12. large gear No. 2; 13. small gear No. 2; 14. transmission gear; 15. rotating shaft No. 4; 16. large gear No. 3; 17. rotating shaft No. 5; 18. output shaft; 19. lubricating oil nozzle No. 1; 20. lubricating oil nozzle No. 2; 21. lubricating oil nozzle No. 3; 22. oil tank; 23. oil drain pipe; 24. filter screen; 25. scraper; 26. rotating rod; 27. connecting side box; 28. worm gear; 29. ​​worm; 30. motor No. 2; 31. oil pump; 32. oil pipeline; 33. oil inlet tank; 34. oil inlet pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 5The present invention provides a technical solution: a compact gear reducer, including a housing 1, a first rotating shaft 5 is rotatably provided inside the housing 1, a first bevel gear 6 is fixedly connected to the outer side of the first rotating shaft 5, a second bevel gear 9 is rotatably provided inside the housing 1, the second bevel gear 9 is meshedly connected with the first bevel gear 6, a first pinion gear 7 is fixedly connected to the outer side of the first rotating shaft 5, a third rotating shaft 11 is rotatably connected inside the housing 1, a second large gear 7 is fixedly connected to the outer side of the third rotating shaft 11 and the second large gear 7 is matched with the first pinion gear 7. The second large gear 12 is meshed with the first small gear 7, the outer side of the third rotating shaft 11 is fixedly connected with the second small gear 13, the inner side of the housing 1 is rotatably connected with the fourth rotating shaft 15, the outer side of the fourth rotating shaft 15 is fixedly connected with the transmission gear 14, the transmission gear 14 is meshed with the second small gear 13, the inner side of the housing 1 is rotatably connected with the fifth rotating shaft 17, the outer side of the fifth rotating shaft 17 is fixedly connected with the third large gear 16, the third large gear 16 is meshed with the transmission gear 14, and the first rotating shaft 17 of the housing 1 is rotatably connected with the fourth rotating shaft 15. The side is rotatably connected with an output shaft 18, one end of the output shaft 18 is fixedly connected to the fifth rotating shaft 17, the interior of the casing 1 is fixedly connected with a No. 1 lubricating oil nozzle 19 that cooperates with the No. 3 large gear 16, the transmission gear 14 and the No. 2 small gear 13, the interior of the casing 1 is fixedly connected with a No. 2 lubricating oil nozzle 20 that cooperates with the No. 1 small gear 7 and the No. 2 large gear 12, and the interior of the casing 1 is fixedly connected with a No. 3 lubricating oil nozzle 21 that cooperates with the No. 1 bevel gear 6 and the No. 2 bevel gear 9. The wheel 12, the second small gear 13, the transmission gear 14 and the third large gear 16 realize that when the first small gear 7 rotates, the second large gear 12 is driven to rotate to complete the deceleration, and then the second large gear 12 drives the second small gear 13 to rotate through the third rotating shaft 11, and the second small gear 13 drives the third large gear 16 to rotate through the transmission gear 14, further completing the deceleration work, and drives the output shaft 18 to rotate through the fifth rotating shaft 17 inside the third large gear 16, and the output is rotated through the output shaft 18.

[0023] Among them, the bottom of the casing 1 is fixedly connected to a supporting base 2, the interior of the supporting base 2 is fixedly connected to a collecting box 3, a plurality of collecting ports 4 are opened inside the casing 1, the collecting ports 4 are communicated with the collecting box 3, the interior of the supporting base 2 is fixedly connected to an oil passing box 22, the collecting box 3 and the oil passing box 22 are connected by a pipeline, the bottom of the oil passing box 22 is fixedly connected to an oil drain pipe 23, the oil drain pipe 23 is fixedly connected to the supporting base 2, the interior of the oil drain pipe 23 is fixedly connected to a filter screen 24, the excess lubricating oil enters the collecting box 3 through the collecting port 4, is collected by the collecting box 3, the lubricating oil in the oil passing box 22 is extracted by the oil pump 31, and the impurities in the lubricating oil in the casing 1 are filtered through the filter screen 24.

[0024] An oil pump 31 is installed inside the support base 2 , the input end of the oil pump 31 is connected to the oil tank 22 through a pipeline, the output end of the oil pump 31 is fixedly connected to an oil delivery pipe 32 , and the oil delivery pipe 32 is fixedly connected to the support base 2 .

[0025] The top of the housing 1 is fixedly connected to an oil inlet tank 33 , the top of the oil inlet tank 33 is fixedly connected to an oil inlet pipe 34 , and one end of the oil delivery pipe 32 is fixedly connected to the oil inlet tank 33 .

[0026] Among them, oil pumps are installed inside the No. 1 lubricating oil nozzle 19, the No. 2 lubricating oil nozzle 20 and the No. 3 lubricating oil nozzle 21, and the oil inlet tank 33 is connected to the oil pumps in the No. 1 lubricating oil nozzle 19, the No. 2 lubricating oil nozzle 20 and the No. 3 lubricating oil nozzle 21 through pipelines. The lubricating oil in the oil inlet tank 33 is drawn into by the oil pumps in the No. 1 lubricating oil nozzle 19, the No. 3 large gear 16, the No. 2 small gear 13 and the transmission gear 14 are lubricated by the No. 1 lubricating oil nozzle 19, the No. 1 small gear 7 and the No. 2 large gear 12 are lubricated by the No. 2 lubricating oil nozzle 20, the No. 1 bevel gear 6 and the No. 2 bevel gear 9 are lubricated by the No. 3 lubricating oil nozzle 21, and the gear set is lubricated.

[0027] Among them, a scraper 25 is rotatably provided on one side of the filter mesh disk 24, and a connecting side box 27 is fixedly connected to the side of the filter mesh disk 24 away from the scraper 25. The inside of the connecting side box 27 is rotatably connected to a rotating rod 26, and one end of the rotating rod 26 is fixedly connected to the scraper 25. The rotating rod 26 is rotatably connected to the filter mesh disk 24. The scraper 25 is used to scrape off impurities on one side of the filter mesh disk 24 to ensure the effect of the filter mesh disk 24 on filtering the lubricating oil.

[0028] A worm 29 is rotatably connected inside the connecting side box 27 , and the worm 29 is rotatably connected to the oil tank 22 . A worm wheel 28 is fixedly connected to the outer side of the rotating rod 26 , and the worm wheel 28 is meshingly connected to the worm 29 .

[0029] Among them, a No. 2 motor 30 is installed on the top of the oil tank 22. The output end of the No. 2 motor 30 is fixedly connected to the worm 29. The output end of the No. 2 motor 30 drives the worm 29 to rotate. When the worm 29 rotates, it drives the meshing worm wheel 28 to rotate. The worm wheel 28 drives the inner rotating rod 26 and the scraper 25 to rotate and adjust. The scraper 25 is used to scrape off the impurities filtered out from one side of the filter mesh plate 24 to ensure the filtering effect.

[0030] Among them, the inner rotation of the casing 1 is connected with a No. 2 rotating shaft 8, one end of which is fixedly connected to a No. 2 bevel gear 9. When the No. 2 rotating shaft 8 rotates, it drives the No. 2 bevel gear 9 to rotate, and the No. 2 bevel gear 9 drives the meshing No. 1 bevel gear 6 to rotate and adjust.

[0031] Among them, a No. 1 motor 10 is installed inside the casing 1, and the output end of the No. 1 motor 10 is fixedly connected to the No. 2 rotating shaft 8. The No. 2 rotating shaft 8 is driven to rotate by the output end of the No. 1 motor 10. When the No. 2 rotating shaft 8 rotates, it drives the No. 2 bevel gear 9 at one end to rotate. The rotating No. 2 bevel gear 9 drives the meshing No. 1 bevel gear 6 to rotate and adjust, thereby completing the deceleration drive processing.

[0032] Specifically, the device is centrally controlled by an external controller, and the device is powered on by an external power supply. The output end of the No. 1 motor 10 drives the No. 2 rotating shaft 8 to rotate. When the No. 2 rotating shaft 8 rotates, it drives the No. 2 bevel gear 9 at one end to rotate. The No. 2 bevel gear 9 rotates in the housing 1. The No. 2 bevel gear 9 drives the meshed No. 1 bevel gear 6 to rotate. The No. 2 bevel gear 9 drives the No. 1 bevel gear 6 to rotate, and the deceleration rotation process is performed. When the No. 1 bevel gear 6 rotates, the No. 1 rotating shaft 5 on the inside is driven to rotate. When the No. 1 rotating shaft 5 rotates, it drives the No. 1 small gear 7 on the outside to rotate. The No. 1 small gear 7 drives the large No. 2 large gear 12 to rotate. Further deceleration is performed, and then when the No. 2 large gear 12 rotates, it drives the inner No. 3 rotating shaft 11 to rotate, and when the No. 3 rotating shaft 11 rotates, it drives the outer No. 2 small gear 13 to rotate, and when the No. 2 small gear 13 rotates, it drives the meshing transmission gear 14 to rotate, and when the transmission gear 14 rotates, it drives the meshing No. 3 large gear 16 to rotate, so that the transmission gear 14 drives the No. 3 large gear 16 to rotate and further complete the deceleration, and when the No. 3 large gear 16 rotates, it drives the inner No. 5 rotating shaft 17 to rotate, and when the No. 5 rotating shaft 17 rotates, it drives the output shaft 18 at one end to rotate, and the deceleration work is completed by the rotation processing of the output shaft 18. After long-term use of the gear The wheel set needs lubrication with lubricating oil. Lubricating oil is injected into the oil inlet tank 33 through the oil inlet pipe 34. A valve is provided on the oil delivery pipe 32. The lubricating oil in the oil inlet tank 33 is pumped into the oil pump through the No. 1 lubricating oil nozzle 19, the No. 2 lubricating oil nozzle 20 and the No. 3 lubricating oil nozzle 21. The No. 3 large gear 16, the No. 2 small gear 13 and the transmission gear 14 are lubricated through the No. 1 lubricating oil nozzle 19, the No. 1 small gear 7 and the No. 2 large gear 12 are lubricated through the No. 2 lubricating oil nozzle 20, and the No. 1 bevel gear 6 and the No. 2 bevel gear 9 are lubricated through the No. 3 lubricating oil nozzle 21. The gear set is lubricated, and the excess lubricating oil enters the collecting port 4 through the collecting port The oil in the collecting box 3 is collected through the collecting box 3, the lubricating oil in the oil tank 22 is extracted by the oil pump 31, the impurities in the lubricating oil in the casing 1 are filtered through the filter screen 24, and the worm 29 is driven to rotate by the output end of the second motor 30. When the worm 29 rotates, it drives the meshing worm wheel 28 to rotate. When the worm wheel 28 rotates, it drives the inner rotating rod 26 to rotate. When the rotating rod 26 rotates, it drives the scraper 25 to rotate. The scraper 25 scrapes off the impurities on one side of the filter screen 24 to ensure the filtering effect. The lubricating oil in the oil tank 22 is pumped into the oil pipe 32 by the oil pump 31, and enters the oil inlet tank 33 through the oil pipe 32 for recycling.

[0033] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0035] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A compact gear reducer, comprising a housing (1), characterized in that: The housing (1) is provided with a first rotating shaft (5) for rotation inside, and a first bevel gear (6) is fixedly connected to the outer side of the first rotating shaft (5). The housing (1) is provided with a second bevel gear (9) for rotation inside, and the second bevel gear (9) is meshingly connected with the first bevel gear (6). The outer side of the first rotating shaft (5) is fixedly connected with a first pinion gear (7). The housing (1) is provided with a third rotating shaft (11) for rotation inside, and a second large gear (12) matched with the first pinion gear (7) is fixedly connected to the outer side of the third rotating shaft (11), and the second large gear (12) is meshingly connected with the first pinion gear (7). The outer side of the third rotating shaft (11) is fixedly connected with a second pinion gear (13). The housing (1) is provided with a fourth rotating shaft (15) for rotation inside, and a transmission gear (14) is fixedly connected to the outer side of the fourth rotating shaft (15). The wheel (14) is meshedly connected with the second pinion gear (13); the housing (1) is rotatably connected with a fifth rotating shaft (17); the outer side of the fifth rotating shaft (17) is fixedly connected with a third large gear (16); the third large gear (16) is meshedly connected with the transmission gear (14); one side of the housing (1) is rotatably connected with an output shaft (18); one end of the output shaft (18) is fixedly connected with the fifth rotating shaft (17); the housing (1) is fixedly connected with a first lubricating oil nozzle (19) matched with the third large gear (16), the transmission gear (14) and the second pinion gear (13); the housing (1) is fixedly connected with a second lubricating oil nozzle (20) matched with the first pinion gear (7) and the second large gear (12); the housing (1) is fixedly connected with a third lubricating oil nozzle (21) matched with the first bevel gear (6) and the second bevel gear (9).

2. A compact gear reducer according to claim 1, characterized in that: The bottom of the casing (1) is fixedly connected to a support base (2), the interior of the support base (2) is fixedly connected to a collection box (3), a plurality of collection ports (4) are provided inside the casing (1), the collection ports (4) are communicated with the collection box (3), the interior of the support base (2) is fixedly connected to an oil passage box (22), the collection box (3) and the oil passage box (22) are connected via a pipeline, the bottom of the oil passage box (22) is fixedly connected to an oil drain pipe (23), the oil drain pipe (23) is fixedly connected to the support base (2), and the interior of the oil drain pipe (23) is fixedly connected to a filter screen (24).

3. A compact gear reducer according to claim 2, characterized in that: An oil pump (31) is installed inside the support base (2); the input end of the oil pump (31) is connected to the oil tank (22) via a pipeline; the output end of the oil pump (31) is fixedly connected to an oil delivery pipe (32); and the oil delivery pipe (32) is fixedly connected to the support base (2).

4. A compact gear reducer according to claim 3, characterized in that: The top of the housing (1) is fixedly connected to an oil inlet box (33), the top of the oil inlet box (33) is fixedly connected to an oil inlet pipe (34), and one end of the oil delivery pipe (32) is fixedly connected to the oil inlet box (33).

5. A compact gear reducer according to claim 4, characterized in that: The first lubricating oil spray head (19), the second lubricating oil spray head (20) and the third lubricating oil spray head (21) are all equipped with oil pumps, and the oil inlet tank (33) is connected to the oil pumps in the first lubricating oil spray head (19), the second lubricating oil spray head (20) and the third lubricating oil spray head (21) through pipelines.

6. A compact gear reducer according to claim 5, characterized in that: A scraper (25) is rotatably provided on one side of the filter screen disc (24); a connecting side box (27) is fixedly connected to the side of the filter screen disc (24) away from the scraper (25); a rotating rod (26) is rotatably connected inside the connecting side box (27); one end of the rotating rod (26) is fixedly connected to the scraper (25); and the rotating rod (26) is rotatably connected to the filter screen disc (24).

7. A compact gear reducer according to claim 6, characterized in that: A worm (29) is rotatably connected inside the connecting side box (27), and the worm (29) is rotatably connected to the oil tank (22). A worm wheel (28) is fixedly connected to the outside of the rotating rod (26), and the worm wheel (28) is meshingly connected to the worm (29).

8. A compact gear reducer according to claim 7, characterized in that: A second motor (30) is installed on the top of the oil tank (22), and an output end of the second motor (30) is fixedly connected to the worm (29).

9. A compact gear reducer according to claim 8, characterized in that: A second rotating shaft (8) is rotatably connected inside the housing (1), and one end of the second rotating shaft (8) is fixedly connected to a second bevel gear (9).

10. A compact gear reducer according to claim 9, characterized in that: A first motor (10) is installed inside the housing (1), and an output end of the first motor (10) is fixedly connected to a second rotating shaft (8).

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