Speed reducer of material stirring device

Abstract

The utility model provides a speed reducer of a material stirring device, and belongs to the technical field of speed reducers. The speed reducer of the material stirring device comprises a box body, an input shaft, a connecting groove, an intermediate shaft, a first gear, a second gear, outer teeth, an output shaft, a third gear, a protective shell, a first oil return hole and a second oil return hole, the first gear and the second gear are located on the outer side of the box body, so that the first gear and the second gear can be replaced and maintained without opening the box body, and the use experience of the product is improved. The first oil return hole is located above the meshing position of the first gear and the second gear, so that lubricating oil can flow into the meshing position of the first gear and the second gear through the first oil return hole, the first gear and the second gear are lubricated, and the situation that the first gear and the second gear are located at the high positions, and the gear is damaged is avoided. And lubricating oil in the box body cannot lubricate the first gear and the second gear, so that the first gear and the second gear are damaged.

Description

Technical Field

[0001] This utility model belongs to the field of speed reducer technology, specifically relating to a material mixer speed reducer. Background Technology

[0002] In related technologies, when mixing materials, the input end of the reducer needs to be connected to the drive device, and the output end of the reducer needs to be connected to the load device, thereby reducing the output speed of the drive device and increasing the output torque of the drive device.

[0003] The prior art (authorization announcement number: CN204828609U) discloses a special reducer for food mixers. It drives the input shaft and various intermediate shafts. The input shaft is sealed with a sealing cover. The two ends of the first, second, third, and fourth intermediate shafts are equipped with a lubrication return system. An oil pump is used to complete the circulation of lubricating oil in the housing. A filter is connected to the oil pump. A regulating valve is set between the oil pump and the filter. The inner wall of the housing is provided with a circulating lubrication channel connected to the oil pump. There is no need to frequently replenish the lubricating oil in the housing. The housing has good sealing performance and is not easy to leak oil, thus improving the safety of use in the food manufacturing process.

[0004] In this prior art, since the first intermediate gear, the second intermediate gear, the third intermediate gear, and the fourth intermediate gear are located inside the housing, and the first transmission gear, the second transmission gear, the third transmission gear, and the fourth transmission gear are also located inside the housing, when the gears are damaged, the entire housing needs to be opened, which increases the difficulty of replacing and repairing the gears. Utility Model Content

[0005] To address the problem in the existing technology where the first, second, third, and fourth intermediate gears, as well as the first, second, third, and fourth transmission gears, are located inside the housing, requiring the entire housing to be opened when gears are damaged, thus increasing the difficulty of gear replacement and repair, this utility model provides a material mixer reducer that positions the first and second gears outside the housing. This allows for replacement and repair of the first and second gears without opening the housing, thereby improving the user experience. The specific technical solution is as follows:

[0006] A material mixer reducer includes: a housing, an input shaft, a connecting groove, an intermediate shaft, a first gear, a second gear, an external gear, an output shaft, a third gear, a protective shell, a first oil return hole, and a second oil return hole; the housing is a hollow cavity; the input shaft passes through the housing from top to bottom, is rotatably connected to the housing, and both ends of the input shaft are located on the outer side of the housing; the connecting groove is provided on the side wall of one end of the input shaft, and is located below the housing; at least part of the intermediate shaft is located inside the housing, is rotatably connected to the housing, and one end of the intermediate shaft is located above the housing; the first gear is connected to the other end of the input shaft, and is located above the housing; the second gear is mounted on the intermediate shaft. On the outer side of the end, the second gear is located above the housing and meshes with the first gear; the external gear is set on the outer wall of the intermediate shaft and is located inside the housing; the output shaft has open hollow cavities at both ends, and the output shaft passes through the housing from top to bottom, and the output shaft is rotatably connected to the housing; the third gear is fitted on the outer side of the output shaft, is located inside the housing, and meshes with the external gear; the protective shell is installed on the top of the housing and surrounds the outer side of the first and second gears; the first oil return hole is located on the top of the protective shell and is located above the meshing point of the first and second gears; the second oil return hole is located on the top of the housing and is located above the third gear.

[0007] In addition, the material mixer reducer in the above-mentioned technical solution provided by this utility model may also have the following additional technical features:

[0008] In the above technical solution, the material mixer reducer further includes: a lubricating gear pump, an oil suction pipe, a first oil return pipe, and a second oil return pipe; the lubricating gear pump is installed at the bottom of the housing and is connected to the other end of the intermediate shaft; one end of the oil suction pipe is connected to the side wall at the bottom of the housing, and the other end of the oil suction pipe is connected to the input end of the lubricating gear pump; one end of the first oil return pipe is connected to the output end of the lubricating gear pump, and the other end of the first oil return pipe is connected to the first oil return hole; one end of the second oil return pipe is connected to the output end of the lubricating gear pump, and the other end of the second oil return pipe is connected to the second oil return hole.

[0009] In the above technical solution, the material mixer reducer further includes: a first bearing, a first fixed cover, a second bearing, and a second fixed cover; the first bearing is fitted on the outer side of the top of the output shaft and is embedded in the housing; the first fixed cover is fixed on the top of the housing and is wrapped around the outer side of the output shaft, and the first fixed cover is in contact with the first bearing; the second bearing is fitted on the outer side of the bottom of the output shaft and is embedded in the housing; the second fixed cover is fixed on the bottom of the housing and is wrapped around the outer side of the output shaft, and the second fixed cover is in contact with the second bearing.

[0010] In the above technical solution, the material mixer reducer also includes: a first oil baffle; the first oil baffle is installed in the housing, the first oil baffle is arranged around the outside of the output shaft, the first oil baffle is located above the second bearing, and the first oil baffle is located below the third gear.

[0011] In the above technical solution, the material mixer reducer further includes: a first oil seal and a second oil seal; the first oil seal is fitted on the outside of the output shaft and embedded in the second fixed cover; the second oil seal is fitted on the outside of the output shaft and embedded in the housing, the second oil seal is located above the third gear and below the first bearing.

[0012] In the above technical solution, the material mixer reducer also includes: a second oil baffle; the cross-section of the second oil baffle is stepped, the second oil baffle is fitted on the outside of the input shaft, and the second oil baffle is located below the first gear.

[0013] In the above technical solution, the material mixer reducer also includes: a lifting component; the lifting component is provided with a lifting hole, and at least two lifting components are connected to the top of the housing.

[0014] The material mixer reducer of this utility model has the following advantages compared with the prior art:

[0015] 1. Since the first and second gears are located on the outside of the housing, they can be replaced and repaired without opening the housing, thus improving the user experience. By installing a protective shell on the top of the housing and surrounding the first and second gears, the protective shell protects them, preventing damage. Furthermore, by placing the first oil return hole on the top of the protective shell, above the meshing point of the first and second gears, lubricating oil can flow into the meshing point, lubricating both gears. This prevents damage to the first and second gears due to their elevated position and insufficient lubrication from the housing's lubricating oil, thereby improving product quality.

[0016] 2. By installing the lubrication gear pump at the bottom of the housing and connecting it to the other end of the intermediate shaft, the intermediate shaft will activate the lubrication gear pump when it rotates. This eliminates the need for a separate drive unit, reducing production costs. By connecting one end of the first oil return pipe and one end of the second oil return pipe to the output end of the lubrication gear pump, and connecting the other end of the first oil return pipe to the first oil return hole and the other end of the second oil return pipe to the second oil return hole, the lubrication gear pump injects lubricating oil into the first and second oil return holes respectively through the first and second oil return pipes. This lubricates the first, second, and third gears, allowing for the reuse of the lubricating oil.

[0017] 3. By fixing the first fixing cover to the top of the housing, wrapping the first fixing cover around the outside of the output shaft, and fitting the first fixing cover to the first bearing, the housing supports the first fixing cover, thereby protecting the output shaft. Simultaneously, the first fixing cover also secures the first bearing within the housing, preventing it from moving out and improving the user experience. Similarly, by fixing the second fixing cover to the bottom of the housing, wrapping the second fixing cover around the outside of the output shaft, and fitting the second fixing cover to the second bearing, the housing supports the second fixing cover, thereby protecting the output shaft. Simultaneously, the second fixing cover also secures the second bearing within the housing, preventing it from moving out and improving the user experience.

[0018] 4. By positioning the first oil baffle above the second bearing and below the third gear, the first oil baffle can block the lubricating oil, thereby preventing the lubricating oil from leaking out through the gap between the output shaft and the second bearing, thus improving the product's sealing performance.

[0019] 5. By fitting the first oil seal onto the outside of the output shaft and embedding it into the second fixed cover, the first oil seal seals the gap between the output shaft and the second fixed cover, thereby preventing lubricating oil from flowing out of the second fixed cover and improving the product's sealing performance. By fitting the second oil seal onto the outside of the output shaft and embedding it into the housing, positioning the second oil seal above the third gear and below the first bearing, the second oil seal blocks the lubricating oil, thereby preventing lubricating oil from entering the first bearing and further preventing lubricating oil from flowing out of the housing.

[0020] 6. By making the cross-section of the second oil baffle step-shaped, the second oil baffle is fitted on the outside of the input shaft and positioned below the first gear, so that the input shaft can drive the second oil baffle to rotate. This allows the lubricating oil to flow into the second oil baffle when it flows into the meshing area of ​​the first and second gears, and then into the second oil baffle, which in turn causes the lubricating oil to splash onto various parts, thereby improving the lubrication effect on the product.

[0021] 7. By connecting multiple lifting frames to the top of the box and setting lifting holes inside the lifting components, steel wire ropes can pass through the lifting holes, thereby enabling the product to be lifted by the lifting components and improving the product's mobility. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a material mixer reducer according to the present invention;

[0023] Figure 2 for Figure 1 A magnified view of part A;

[0024] Figure 3 for Figure 1 A magnified view of section B;

[0025] Figure 4 for Figure 1 A magnified view of a portion at point C;

[0026] Figure 5 This is a top view of a material mixer reducer according to the present invention;

[0027] Figure 6 This is a bottom view of a material mixer reducer according to the present invention;

[0028] in, Figures 1 to 6 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0029] 10 Housing, 11 Input shaft, 12 Connecting groove, 13 Intermediate shaft, 14 First gear, 15 Second gear, 16 External gear, 17 Output shaft, 18 Third gear, 19 Protective shell, 20 First oil return hole, 21 Second oil return hole, 22 Lubricating gear pump, 23 Suction pipe, 24 First oil return pipe, 25 Second oil return pipe, 26 First bearing, 27 First fixed cover, 28 Second bearing, 29 Second fixed cover, 30 First oil baffle, 31 First oil seal, 32 Second oil seal, 33 Second oil baffle, 34 Lifting component, 35 Lifting hole. Detailed Implementation

[0030] The following are specific implementation cases and appendices. Figures 1 to 6 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0031] A material mixer reducer, such as Figures 1 to 6 As shown, the material mixer reducer includes: a housing 10, an input shaft 11, a connecting groove 12, an intermediate shaft 13, a first gear 14, a second gear 15, an external gear 16, an output shaft 17, a third gear 18, a protective shell 19, a first oil return hole 20, and a second oil return hole 21; the housing 10 is a hollow cavity; the input shaft 11 passes through the housing 10 from top to bottom, and is rotatably connected to the housing 10, with both ends of the input shaft 11 located on the outside of the housing 10; the connecting groove 12 is provided on the side wall of one end of the input shaft 11, and is located below the housing 10; at least part of the intermediate shaft 13 is located inside the housing 10, and is rotatably connected to the housing 10, with one end of the intermediate shaft 13 located above the housing 10; the first gear 14 is connected to the other end of the input shaft 11, and is located above the housing 10; the second gear 15 is fitted onto one end of the intermediate shaft 13. On the outside, the second gear 15 is located above the housing 10 and meshes with the first gear 14; the external gear 16 is set on the outer wall of the intermediate shaft 13 and is located inside the housing 10; the output shaft 17 has open hollow cavities at both ends, and the output shaft 17 passes through the housing 10 from top to bottom, and the output shaft 17 is rotatably connected to the housing 10; the third gear 18 is fitted on the outside of the output shaft 17, and is located inside the housing 10, and meshes with the external gear 16; the protective shell 19 is installed on the top of the housing 10 and is wrapped around the outside of the first gear 14 and the second gear 15; the first oil return hole 20 is set on the top of the protective shell 19 and is located above the meshing point of the first gear 14 and the second gear 15; the second oil return hole 21 is set on the top of the housing 10 and is located above the third gear 18.

[0032] By having the input shaft 11 pass through the housing 10 from top to bottom and rotatably connected to the housing 10, the housing 10 supports the input shaft 11, allowing the input shaft 11 to rotate within the housing 10. By providing a connecting groove 12 on the side wall of one end of the input shaft 11 and positioning it below the housing 10, the drive device can connect to the input shaft 11 via the connecting groove 12, thus providing power to rotate the input shaft 11. By having at least a portion of the intermediate shaft 13 located within the housing 10 and rotatably connected to the housing 10, the housing 10 supports the intermediate shaft 13, allowing the intermediate shaft 13 to rotate within the housing 10. By connecting the first gear 14 to the other end of the input shaft 11 and fitting the second gear 15 onto the outside of one end of the intermediate shaft 13, with the second gear 15 meshing with the first gear 14, the input shaft 11 drives the intermediate shaft 13 to rotate via the first gear 14 and the second gear 15 when the input shaft 11 rotates. By setting the external gear 16 on the outer wall of the intermediate shaft 13 and placing the external gear 16 inside the housing 10, the intermediate shaft 13 and the external gear 16 can rotate synchronously. By passing the output shaft 17 from top to bottom through the housing 10 and rotatably connecting the output shaft 17 to the housing 10, the housing 10 supports the output shaft 17, thereby enabling the output shaft 17 to rotate within the housing 10. By mounting the third gear 18 on the outside of the output shaft 17 and placing the third gear 18 inside the housing 10, and by meshing the third gear 18 with the external gear 16, when the intermediate shaft 13 rotates, the intermediate shaft 13 drives the output shaft 17 to rotate through the external gear 16 and the third gear 18, thereby enabling the output shaft 17 to drive the load device to rotate. By installing the protective shell 19 on the top of the housing 10 and surrounding the outside of the first gear 14 and the second gear 15, the housing 10 supports the protective shell 19, thereby protecting the first gear 14 and the second gear 15 from damage and improving product quality. By placing the first oil return hole 20 on the top of the protective shell 19 and positioning it above the meshing point of the first gear 14 and the second gear 15, lubricating oil can flow into the meshing point of the first gear 14 and the second gear 15 through the first oil return hole 20, thus lubricating the first gear 14 and the second gear 15 and improving the user experience. By placing the second oil return hole 21 on the top of the housing 10 and positioning it above the third gear 18, lubricating oil can flow to the third gear 18 through the second oil return hole 21, thus lubricating the third gear 18 and improving the user experience.

[0033] Using the above structure, the drive device is first connected to the input shaft 11, and the load device is connected to the output shaft 17. The first gear 14 is connected to the other end of the input shaft 11, and the second gear 15 is fitted onto the outside of one end of the intermediate shaft 13, meshing with the first gear 14. This allows the input shaft 11 to rotate via the first gear 14 and the second gear 15 when the drive device rotates. The external teeth 16 of the intermediate shaft 13 mesh with the third gear 18, which is fitted onto the outside of the output shaft 17. This allows the intermediate shaft 13 to rotate via the external teeth 16 and the third gear 18 when it rotates, thus enabling the output shaft 17 to drive the load device. Since the first gear 14 and the second gear 15 are located outside the housing 10, they can be replaced and repaired without opening the housing 10, improving the user experience. By installing the protective shell 19 on the top of the housing 10 and surrounding the outside of the first gear 14 and the second gear 15, the protective shell 19 protects the first gear 14 and the second gear 15, thereby preventing damage to the first gear 14 and the second gear 15. By setting the first oil return hole 20 on the top of the protective shell 19 and positioning it above the meshing point of the first gear 14 and the second gear 15, lubricating oil can flow into the meshing point of the first gear 14 and the second gear 15 through the first oil return hole 20, thereby lubricating the first gear 14 and the second gear 15. This prevents damage to the first gear 14 and the second gear 15 due to insufficient lubrication of the first gear 14 and the second gear 15 by the lubricating oil in the housing 10, thus improving product quality.

[0034] In embodiments of this utility model, such as Figures 1 to 6 As shown, the material mixer reducer also includes: a lubrication gear pump 22, an oil suction pipe 23, a first oil return pipe 24, and a second oil return pipe 25; the lubrication gear pump 22 is installed at the bottom of the housing 10, and the other end of the lubrication gear pump 22 is connected to the intermediate shaft 13; one end of the oil suction pipe 23 is connected to the side wall at the bottom of the housing 10, and the other end of the oil suction pipe 23 is connected to the input end of the lubrication gear pump 22; one end of the first oil return pipe 24 is connected to the output end of the lubrication gear pump 22, and the other end of the first oil return pipe 24 is connected to the first oil return hole 20; one end of the second oil return pipe 25 is connected to the output end of the lubrication gear pump 22, and the other end of the second oil return pipe 25 is connected to the second oil return hole 21.

[0035] By installing the lubrication gear pump 22 at the bottom of the housing 10 and connecting the lubrication gear pump 22 to the other end of the intermediate shaft 13, the intermediate shaft 13 will start the lubrication gear pump 22 when it rotates, thus enabling the lubrication gear pump 22 to work without the need for a separate drive device, thereby reducing the production cost of the product. By connecting one end of the oil suction pipe 23 to the side wall at the bottom of the housing 10 and connecting the oil suction pipe 23 to the input end of the lubrication gear pump 22, the lubrication gear pump 22 can extract lubricating oil from the housing 10 through the oil suction pipe 23 when the lubrication gear pump 22 is working. By connecting one end of the first return oil pipe 24 and one end of the second return oil pipe 25 to the output end of the lubrication gear pump 22, connecting the other end of the first return oil pipe 24 to the first return oil hole 20, and connecting the other end of the second return oil pipe 25 to the second return oil hole 21, the lubrication gear pump 22 can inject lubricating oil into the first return oil hole 20 and the second return oil hole 21 through the first return oil pipe 24 and the second return oil pipe 25 respectively, thereby lubricating the first gear 14, the second gear 15, and the third gear 18, and thus realizing the reuse of lubricating oil.

[0036] In embodiments of this utility model, such as Figures 1 to 6 As shown, the material mixer reducer also includes: a first bearing 26, a first fixing cover 27, a second bearing 28, and a second fixing cover 29; the first bearing 26 is fitted on the outer side of the top of the output shaft 17 and is embedded in the housing 10; the first fixing cover 27 is fixed on the top of the housing 10 and is wrapped around the outer side of the output shaft 17, and the first fixing cover 27 is in contact with the first bearing 26; the second bearing 28 is fitted on the outer side of the bottom of the output shaft 17 and is embedded in the housing 10; the second fixing cover 29 is fixed on the bottom of the housing 10 and is wrapped around the outer side of the output shaft 17, and the second fixing cover 29 is in contact with the second bearing 28.

[0037] By mounting the first bearing 26 on the outer side of the top of the output shaft 17 and mounting the second bearing 28 on the outer side of the bottom of the output shaft 17, and embedding the first bearing 26 and the second bearing 28 into the housing 10, the housing 10 supports the output shaft 17 through the first bearing 26 and the second bearing 28, thereby improving the stability of the rotation of the output shaft 17. By fixing the first fixing cover 27 to the top of the housing 10, wrapping the first fixing cover 27 around the outside of the output shaft 17, and fitting the first fixing cover 27 against the first bearing 26, the housing 10 supports the first fixing cover 27, thereby protecting the output shaft 17. Simultaneously, the first fixing cover 27 also secures the first bearing 26 inside the housing 10, preventing it from moving out and improving the user experience. Similarly, by fixing the second fixing cover 29 to the bottom of the housing 10, wrapping the second fixing cover 29 around the outside of the output shaft 17, and fitting the second fixing cover 29 against the second bearing 28, the housing 10 supports the second fixing cover 29, thereby protecting the output shaft 17. Simultaneously, the second fixing cover 29 also secures the second bearing 28 inside the housing 10, preventing it from moving out and improving the user experience.

[0038] Specifically, the first bearing 26 and the second bearing 28 are lubricated with glycerin.

[0039] In embodiments of this utility model, such as Figures 1 to 6 As shown, the material mixer reducer also includes: a first oil baffle 30; the first oil baffle 30 is installed inside the housing 10, the first oil baffle 30 is arranged around the outside of the output shaft 17, the first oil baffle 30 is located above the second bearing 28, and the first oil baffle 30 is located below the third gear 18.

[0040] By installing the first oil baffle 30 inside the housing 10 and surrounding the output shaft 17, the first oil baffle 30 protects the output shaft 17. At the same time, by positioning the first oil baffle 30 above the second bearing 28 and below the third gear 18, the first oil baffle 30 can block the lubricating oil, thereby preventing the lubricating oil from flowing out through the gap between the output shaft 17 and the second bearing 28, thus improving the product's sealing performance.

[0041] In an embodiment of this utility model, the material mixer reducer further includes: a first oil seal 31 and a second oil seal 32; the first oil seal 31 is fitted on the outside of the output shaft 17 and is embedded in the second fixed cover 29; the second oil seal 32 is fitted on the outside of the output shaft 17 and is embedded in the housing 10, the second oil seal 32 is located above the third gear 18 and below the first bearing 26.

[0042] By fitting the first oil seal 31 onto the outside of the output shaft 17 and embedding it into the second fixed cover 29, the first oil seal 31 seals the gap between the output shaft 17 and the second fixed cover 29, thereby preventing lubricating oil from flowing out of the second fixed cover 29 and improving the product's sealing performance. By fitting the second oil seal 32 onto the outside of the output shaft 17 and embedding it into the housing 10, the second oil seal 32 is positioned above the third gear 18 and below the first bearing 26, thereby blocking the lubricating oil from entering the first bearing 26 and further preventing lubricating oil from flowing out of the housing 10.

[0043] In embodiments of this utility model, such as Figures 1 to 6 As shown, the material mixer reducer also includes: a second oil baffle 33; the cross-section of the second oil baffle 33 is stepped, the second oil baffle 33 is fitted on the outside of the input shaft 11, and the second oil baffle 33 is located below the first gear 14.

[0044] By making the cross-section of the second oil baffle 33 stepped, the second oil baffle 33 is fitted onto the outside of the input shaft 11 and positioned below the first gear 14, so that the input shaft 11 can drive the second oil baffle 33 to rotate. This allows the lubricating oil to flow into the second oil baffle 33 when the lubricating oil flows into the meshing area of ​​the first gear 14 and the second gear 15. Consequently, the second oil baffle 33 causes the lubricating oil to splash onto various parts, thereby improving the lubrication effect on the product.

[0045] In embodiments of this utility model, such as Figures 1 to 6 As shown, the material mixer reducer also includes: a lifting component 34; the lifting component 34 is provided with a lifting hole 35, and at least two lifting components 34 are connected to the top of the housing 10.

[0046] By connecting multiple lifting frames to the top of the housing 10 and setting the lifting hole 35 inside the lifting component 34, the wire rope can pass through the lifting hole 35, thereby enabling the product to be lifted by the lifting component 34 and improving the mobility of the product.

[0047] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," 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 element 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. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0048] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A material mixer reducer, characterized in that, The material mixer reducer includes: The housing is a hollow cavity; An input shaft passes through the housing from top to bottom, is rotatably connected to the housing, and has both ends located on the outside of the housing; A connecting groove is provided on the side wall at one end of the input shaft, and the connecting groove is located below the housing; An intermediate shaft, at least a portion of which is located within the housing, is rotatably connected to the housing, and one end of which is located above the housing; The first gear is connected to the other end of the input shaft and is located above the housing. The second gear is mounted on the outside of one end of the intermediate shaft, the second gear is located above the housing, and the second gear meshes with the first gear; External teeth, which are disposed on the outer wall of the intermediate shaft and located inside the housing; An output shaft has open hollow cavities at both ends, passes through the housing from top to bottom, and is rotatably connected to the housing; The third gear is mounted on the outside of the output shaft, located inside the housing, and meshes with the external gear. A protective shell is installed on the top of the housing and is arranged around the outside of the first gear and the second gear; The first oil return hole is located on the top of the protective shell and is situated above the meshing point of the first gear and the second gear. The second oil return hole is located at the top of the housing and above the third gear.

2. The material mixer reducer according to claim 1, characterized in that, The material mixer reducer also includes: A lubrication gear pump is installed at the bottom of the housing and connected to the other end of the intermediate shaft; An oil suction pipe, one end of which is connected to the side wall at the bottom of the housing, and the other end of which is connected to the input end of the lubrication gear pump; The first oil return pipe has one end connected to the output end of the lubricating gear pump, and the other end connected to the first oil return hole. The second return oil pipe has one end connected to the output end of the lubricating gear pump, and the other end connected to the second return oil hole.

3. The material mixer reducer according to claim 2, characterized in that, The material mixer reducer also includes: The first bearing is mounted on the outside of the top of the output shaft and is embedded in the housing. The first fixing cover is fixed to the top of the housing, the first fixing cover is wrapped around the outside of the output shaft, and the first fixing cover is in contact with the first bearing; The second bearing is mounted on the outside of the bottom of the output shaft and is embedded in the housing. The second fixing cover is fixed to the bottom of the housing and is wrapped around the outside of the output shaft, and is in contact with the second bearing.

4. The material mixer reducer according to claim 3, characterized in that, The material mixer reducer also includes: The first oil baffle is installed inside the housing and is arranged around the outside of the output shaft. The first oil baffle is located above the second bearing and below the third gear.

5. The material mixer reducer according to claim 3, characterized in that, The material mixer reducer also includes: The first oil seal is fitted onto the outside of the output shaft and is embedded in the second fixing cover; The second oil seal is fitted on the outside of the output shaft and embedded in the housing. The second oil seal is located above the third gear and below the first bearing.

6. The material mixer reducer according to claim 1, characterized in that, The material mixer reducer also includes: The second oil baffle has a stepped cross-section and is fitted onto the outside of the input shaft, located below the first gear.

7. A material mixer reducer according to claim 6, characterized in that, The material mixer reducer also includes: The lifting components are provided with lifting holes, and at least two of the lifting components are connected to the top of the box body.

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