Speed reducer of medium-speed coal mill

Abstract

The utility model provides a speed reducer of a medium-speed coal mill, and belongs to the technical field of speed reducers. The speed reducer of the medium-speed coal mill comprises a box body, an input shaft, a first bevel gear, a sun shaft assembly, a second bevel gear, a gear ring, a planet gear, a planet carrier, an output shaft, an oil return sealing cover, an oil slinger and an oil return pipe, the oil slinger is arranged on the outer side of the input shaft in a sleeving mode, the oil return sealing cover is connected with the side wall of the box body, and the oil return sealing cover is arranged on the outer sides of the input shaft and the oil slinger in a winding mode, so that the oil slinger can throw lubricating oil flowing outwards along the input shaft into the oil return sealing cover, and the lubricating oil is collected through the oil return sealing cover; one end of the oil return pipe is communicated with the bottom of the oil return sealing cover, and the other end of the oil return pipe is communicated with the tank body, so that lubricating oil in the oil return sealing cover can flow back into the tank body through the oil return pipe, the lubricating oil can be reused, and waste of the lubricating oil is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of speed reducers, and in particular relates to a speed reducer for a medium-speed coal mill. Background Art

[0002] In related technologies, planetary reducers have many advantages such as small size, large torque, high reduction ratio, and low backlash, and are gradually being widely used in the field of precision servo transmission.

[0003] The prior art (Announcement No.: CN218236041U) discloses a mixing reducer, which arranges a cooling fan on the outside of an input shaft so that when a driving device drives the input shaft to rotate, the input shaft drives the cooling fan to rotate, thereby promoting air flow in a workshop building and reducing the temperature in the workshop building. This not only improves the comfort of the staff working in the workshop building, but also facilitates the normal operation of the product. At the same time, there is no need to set up additional cooling equipment to cool down the workshop building, thereby reducing the production cost of the product.

[0004] In the prior art, when the input shaft rotates in the housing, the lubricating oil in the housing will flow outward along the outer wall of the input shaft, thereby causing a waste of the lubricating oil. Utility Model Content

[0005] In order to solve the problem in the prior art that when the input shaft rotates in the housing, the lubricating oil in the housing will flow out along the outer wall of the input shaft, thus causing the waste of lubricating oil, the utility model provides a medium-speed coal mill reducer, which adopts an oil slinger ring to sling the lubricating oil flowing out along the input shaft into the oil return sealing cover, so that the oil return sealing cover can collect the lubricating oil, and the lubricating oil in the oil return sealing cover can flow back into the housing through the oil return pipe, so as to realize the reuse of the lubricating oil and avoid the waste of lubricating oil. Its specific technical scheme is:

[0006] A medium-speed coal mill reducer, the medium-speed coal mill reducer comprises: a housing, an input shaft, a first bevel gear, a sun shaft assembly, a second bevel gear, a gear ring, a planetary gear, a planetary carrier, an output shaft, an oil return sealing cover, an oil slinger and an oil return pipe; the housing is a hollow cavity; the input shaft passes through the side wall of the housing, the input shaft is rotatably connected to the housing, one end of the input shaft is located in the housing, and the other end of the input shaft is located outside the housing; the first bevel gear is embedded in the housing, and the first bevel gear is connected to the input shaft; the sun shaft assembly is embedded in the housing, the sun shaft assembly is rotatably connected to the housing, and the outer wall of one end of the sun shaft assembly is provided with a first external tooth; the second bevel gear is sleeved on the outside of the sun shaft assembly, and the second bevel gear is meshed with the first bevel gear; The first inner teeth and the ring gear are installed in the casing, and the ring gear is wound around the outside of the sun shaft assembly; the second outer teeth are arranged on the outer wall of the planetary gear, and the three planetary gears are embedded in the ring gear, and the second outer teeth of the three planetary gears are meshed with the first outer teeth of the sun shaft assembly and the first inner teeth of the ring gear at the same time; the planetary carrier is rotationally connected with the three planetary gears at the same time; one end of the output shaft is connected to the planetary carrier, and the other end of the output shaft passes through the casing; the return oil sealing cover is a hollow cavity, the return oil sealing cover is connected to the side wall of the casing, and the return oil sealing cover is wound around the outside of the input shaft; the oil slinger is sleeved on the outside of the input shaft, and at least part of the oil slinger is embedded in the return oil sealing cover; one end of the return oil pipe is connected to the bottom of the return oil sealing cover, and the other end of the return oil pipe is connected to the casing.

[0007] In addition, the medium-speed coal mill reducer in the above technical solution provided by the utility model may also have the following additional technical features:

[0008] In the above technical solution, the medium-speed coal mill reducer also includes: a sealing ring; the sealing ring is an elastomer, the sealing ring is sleeved on the outside of the oil slinger ring, and the sealing ring is embedded in the oil return sealing cover; wherein, one end of the return oil pipe is located above the other end of the return oil pipe.

[0009] In the above technical scheme, the medium-speed coal mill reducer also includes: a guide plate, a baffle and a reflux hole; the guide plate is embedded in the return oil sealing cover, and the guide plate is connected to the outer wall of the oil slinger ring; two baffles are embedded in the return oil sealing cover, the two baffles are connected to the inner wall of the return oil sealing cover, and the two baffles are located on both sides of the guide plate; the reflux hole is arranged at the bottom of the baffle; wherein one end of the return oil pipe is located between the two baffles.

[0010] In the above technical scheme, the sun shaft assembly includes: an intermediate shaft, a gear sleeve and a sun shaft body; a third external tooth is arranged on the outer wall of the intermediate shaft, the intermediate shaft is rotatably connected to the housing, and the second bevel gear is sleeved on the outer side of the intermediate shaft; the gear sleeve is a hollow cavity with openings at both ends, a second internal tooth is arranged on the inner wall of the gear sleeve, the gear sleeve is wound around the outer side of the intermediate shaft, and the second internal tooth of the gear sleeve is meshed with the third external tooth of the intermediate shaft; one end of the sun shaft body is embedded between the three planetary gears, the first external tooth is arranged on the outer wall of one end of the sun shaft body, the other end of the sun shaft body is embedded in the gear sleeve, the third external tooth is arranged on the outer wall of the other end of the sun shaft body, and the third external tooth of the sun shaft body is meshed with the second internal tooth of the gear sleeve.

[0011] In the above technical solution, the medium-speed coal mill reducer also includes: a first spherical top and a second spherical top; the first spherical top is in an arc shape, the first spherical top is connected to one end of the sun shaft body, and the first spherical top is fitted with the planetary carrier; the second spherical top is in an arc shape, the second spherical top is connected to the other end of the sun shaft body, and the second spherical top is fitted with the intermediate shaft.

[0012] In the above technical solution, the medium-speed coal mill reducer further includes: a clearance groove; the clearance groove is arranged in the planetary carrier, and the clearance groove is arranged around the outer side of the first spherical top.

[0013] In the above technical solution, the medium-speed coal mill reducer also includes: a connecting groove and an output flange; the connecting groove is arranged at the other end of the input shaft, and the connecting groove is located on the outside of the return oil sealing cover; the output flange is connected to the other end of the output shaft, and the output flange is located on the outside of the box body.

[0014] Compared with the prior art, the medium-speed coal mill reducer of the utility model has the following beneficial effects:

[0015] 1. When the input shaft rotates in the housing, the lubricating oil in the housing will flow outward along the outer wall of the input shaft; by sleeve-mounting the oil slinger ring on the outer side of the input shaft, connecting the oil return sealing cover with the side wall of the housing, and winding the oil return sealing cover around the outer side of the input shaft and the oil slinger ring, the oil slinger ring can sling the lubricating oil flowing outward along the input shaft into the oil return sealing cover, so that the oil return sealing cover can collect the lubricating oil; by connecting one end of the oil return pipe with the bottom of the oil return sealing cover, and connecting the other end of the oil return pipe with the housing, the lubricating oil in the oil return sealing cover can flow back into the housing through the oil return pipe, so that the lubricating oil can be reused to avoid the waste of lubricating oil.

[0016] 2. By putting the sealing ring on the outside of the oil slinger ring, embedding the seal into the oil return sealing cover, and setting the sealing ring as an elastomer, the sealing ring can seal the connection between the oil slinger ring and the oil return sealing cover, thereby preventing the lubricating oil from flowing out of the gap between the oil slinger ring and the oil return sealing cover, so as to improve the sealing performance of the product.

[0017] 3. By connecting the two baffles to the inner wall of the oil return sealing cover, the two baffles are located on both sides of the guide plate, and one end of the oil return pipe is located between the two baffles, so that the two baffles can block the lubricating oil thrown out by the guide plate, so as to ensure that the lubricating oil flows into the oil return pipe, thereby enabling the lubricating oil to flow back to the box, thereby improving the product usage experience.

[0018] 4. By making the intermediate shaft, gear sleeve and sun shaft body rotate synchronously and dividing the intermediate shaft, gear sleeve and sun shaft body into three separate parts, compared with setting the intermediate shaft and the sun shaft body as an integral part and requiring a longer length for the intermediate shaft and the sun shaft body, the processing difficulty of the intermediate shaft and the sun shaft is smaller. At the same time, it is easier to install the intermediate shaft and the sun shaft in the box, thereby improving the assembly efficiency of the product and enhancing the user experience of the product.

[0019] 5. By connecting the first and second arc-shaped domes to the two ends of the sun shaft body respectively, the first dome is fitted with the planetary frame, and the second dome is fitted with the intermediate shaft, so as to reduce the contact area between the sun shaft body and the planetary frame and the intermediate shaft, thereby avoiding the damage of the sun shaft body due to excessive contact area between the sun shaft body and the planetary frame and the intermediate shaft; moreover, even if the first dome and the second dome are damaged, only the first dome or the second dome needs to be replaced, so there is no need to replace the sun shaft body, thereby reducing the maintenance cost of the product.

[0020] 6. By arranging the clearance groove in the planet carrier and surrounding the outer side of the first spherical top, the first spherical top is prevented from contacting with the planet carrier, thereby preventing the first spherical top from being damaged, thereby improving the quality of the product.

[0021] 7. By setting the connecting groove at the other end of the input shaft and making the connecting groove located on the outside of the oil return sealing cover, the driving device can be connected to the input shaft through the connecting groove, thereby reducing the difficulty of connecting the input shaft and the driving device, thereby improving the product usage experience; by connecting the output flange to the other end of the output shaft and making the output flange located on the outside of the box, the output shaft can be connected to the load device through the output flange, thereby reducing the difficulty of connecting the load device and the output shaft, thereby improving the product usage experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a cross-sectional view of a medium-speed coal mill reducer of the utility model;

[0023] Figure 2 for Figure 1 A local enlarged view of point A;

[0024] Figure 3 for Figure 1 A partial enlarged view of point B;

[0025] in, Figures 1 to 3 The corresponding relationship between the reference numerals and component names in the figure is:

[0026] 10 housing, 11 input shaft, 12 first bevel gear, 13 sun shaft assembly, 131 intermediate shaft, 132 gear sleeve, 133 sun shaft body, 14 second bevel gear, 15 gear ring, 16 planetary gear, 17 planetary carrier, 18 output shaft, 19 oil return sealing cover, 20 oil slinger, 21 oil return pipe, 22 sealing ring, 23 guide plate, 24 baffle, 25 reflux hole, 26 first ball top, 27 second ball top, 28 clearance groove, 29 connecting groove, 30 output flange. DETAILED DESCRIPTION

[0027] The following is a combination of specific implementation cases and attached Figures 1 to 3 The present invention is further described below, but the present invention is not limited to these embodiments.

[0028] A medium speed coal mill reducer, such as Figures 1 to 3As shown, the medium-speed coal mill reducer comprises: a housing 10, an input shaft 11, a first bevel gear 12, a sun shaft assembly 13, a second bevel gear 14, a gear ring 15, a planetary gear 16, a planetary carrier 17, an output shaft 18, an oil return sealing cover 19, an oil slinger 20 and an oil return pipe 21; the housing 10 is a hollow cavity; the input shaft 11 passes through the side wall of the housing 10, the input shaft 11 is rotatably connected to the housing 10, one end of the input shaft 11 is located in the housing 10, and the output shaft 18 is provided with a plurality of gears. The other end of the input shaft 11 is located outside the housing 10; the first bevel gear 12 is embedded in the housing 10, and the first bevel gear 12 is connected to the input shaft 11; the sun shaft assembly 13 is embedded in the housing 10, the sun shaft assembly 13 is rotatably connected to the housing 10, and the outer wall of one end of the sun shaft assembly 13 is provided with a first external tooth; the second bevel gear 14 is sleeved on the outer side of the sun shaft assembly 13, and the second bevel gear 14 is meshed with the first bevel gear 12; the ring gear 15 is provided with A first inner tooth is arranged, and a ring gear 15 is installed in the housing 10, and the ring gear 15 is wound around the outer side of the sun shaft assembly 13; a second outer tooth is arranged on the outer wall of the planetary gear 16, and three planetary gears 16 are embedded in the ring gear 15, and the second outer teeth of the three planetary gears 16 are meshed with the first outer teeth of the sun shaft assembly 13 and the first inner teeth of the ring gear 15 at the same time; the planet carrier 17 is rotatably connected with the three planetary gears 16 at the same time; one end of the output shaft 18 is connected to the planet carrier 17, and the other end of the output shaft 18 passes through the housing 10; the return oil sealing cover 19 is a hollow cavity, the return oil sealing cover 19 is connected to the side wall of the housing 10, and the return oil sealing cover 19 is wound around the outer side of the input shaft 11; the oil slinger 20 is sleeved on the outer side of the input shaft 11, and at least part of the oil slinger 20 is embedded in the return oil sealing cover 19; one end of the return oil pipe 21 is connected to the bottom of the return oil sealing cover 19, and the other end of the return oil pipe 21 is connected to the housing 10.

[0029] By passing the input shaft 11 through the side wall of the housing 10 and rotatably connecting the input shaft 11 to the housing 10, the housing 10 supports the input shaft 11, thereby enabling the input shaft 11 to rotate within the housing 10; by embedding the sun shaft assembly 13 into the housing 10 and rotatably connecting the sun shaft assembly 13 to the housing 10, the housing 10 supports the sun shaft assembly 13, thereby enabling the sun shaft assembly 13 to rotate within the housing 10. The first bevel gear 12 is connected to the input shaft 11, the second bevel gear 14 is sleeved on the outside of the sun shaft assembly 13, and the second bevel gear 14 is meshed with the first bevel gear 12 to rotate the input shaft 11, so that the input shaft 11 drives the sun shaft assembly 13 to rotate through the first bevel gear 12 and the second bevel gear 14; the ring gear 15 is installed in the housing 10, and the ring gear 15 is wound around the outside of the sun shaft assembly 13, so that the housing 10 supports the ring gear 15; the three planetary gears 16 are embedded in the ring gear 15, and the second gears of the three planetary gears 16 are meshed. The outer teeth are meshed with the first outer teeth of the sun shaft assembly 13 and the first inner teeth of the ring gear 15 at the same time, so that when the sun shaft assembly 13 rotates, the sun shaft assembly 13 drives the three planetary gears 16 to rotate along the inner wall of the ring gear 15; by rotating the planet carrier 17 and the three planetary gears 16 at the same time, one end of the output shaft 18 is connected to the planet carrier 17, and the other end of the output shaft 18 passes through the housing 10, so that when the three planetary gears 16 rotate along the inner wall of the ring gear 15, the three planetary gears 16 drive the planet carrier 17 and the output shaft 18 to rotate, thereby realizing power output. The oil return sealing cover 19 is connected to the side wall of the housing 10, and the oil return sealing cover 19 is wound around the outside of the input shaft 11, so that the housing 10 supports the oil return sealing cover 19, so that the input shaft 11 can rotate in the oil return sealing cover 19; the oil slinger 20 is sleeved on the outside of the input shaft 11, and at least part of the oil slinger 20 is embedded in the oil return sealing cover 19, so that the input shaft 11 can drive the oil slinger 20 to rotate, so that when the input shaft 11 rotates, the lubricant in the housing 10 When the lubricating oil flows out along the input shaft 11 to the outside of the housing 10, the oil slinger 20 swings the lubricating oil onto the inner wall of the oil return sealing cover 19, so that the oil return sealing cover 19 can collect the lubricating oil slingering from the oil slinger 20; by connecting one end of the oil return pipe 21 with the bottom of the oil return sealing cover 19 and connecting the other end of the oil return pipe 21 to the housing 10, the lubricating oil collected in the oil return sealing cover 19 can flow back to the housing 10 through the oil return pipe 21, thereby realizing the reuse of the lubricating oil.

[0030] When the product is used, the driving device is first connected to the input shaft 11, and the load device is connected to the output shaft 18; then, the driving device is started to drive the input shaft 11 to rotate, so that the input shaft 11 drives the sun shaft assembly 13 to rotate through the first bevel gear 12 and the second bevel gear 14; when the sun shaft assembly 13 rotates, the sun shaft assembly 13 will drive the three planetary gears 16 to rotate along the inner wall of the ring gear 15, thereby driving the planet carrier 17 and the output shaft 18 to rotate, and then the output shaft 18 drives the load device to operate.

[0031] With the above structure, when the input shaft 11 rotates in the housing 10, the lubricating oil in the housing 10 will flow outward along the outer wall of the input shaft 11; by sleeved the oil slinger 20 on the outer side of the input shaft 11, the oil return sealing cover 19 is connected to the side wall of the housing 10, and the oil return sealing cover 19 is wound around the outer side of the input shaft 11 and the oil slinger 20, so that the oil slinger 20 can throw the lubricating oil flowing outward along the input shaft 11 into the oil return sealing cover 19, so that the oil return sealing cover 19 collects the lubricating oil; by connecting one end of the oil return pipe 21 to the bottom of the oil return sealing cover 19, and connecting the other end of the oil return pipe 21 to the housing 10, so that the lubricating oil in the oil return sealing cover 19 can flow back to the housing 10 through the oil return pipe 21, so that the lubricating oil can be reused to avoid the waste of lubricating oil.

[0032] In the embodiment of the present utility model, Figures 1 to 3 As shown, the medium-speed coal mill reducer also includes: a sealing ring 22; the sealing ring 22 is an elastomer, the sealing ring 22 is sleeved on the outside of the oil slinger 20, and the sealing ring 22 is embedded in the oil return sealing cover 19; wherein, one end of the return oil pipe 21 is located above the other end of the return oil pipe 21.

[0033] By putting the sealing ring 22 on the outside of the oil slinger 20, embedding the seal into the oil return sealing cover 19, and setting the sealing ring 22 as an elastic body, the sealing ring 22 can seal the connection between the oil slinger 20 and the oil return sealing cover 19, thereby preventing the lubricating oil from flowing out of the gap between the oil slinger 20 and the oil return sealing cover 19, so as to improve the sealing performance of the product. By making one end of the oil return pipe 21 above the other end of the oil return pipe 21, it is ensured that the lubricating oil can flow back into the box 10, thereby improving the use experience of the product.

[0034] In the embodiment of the present utility model, Figures 1 to 3As shown, the medium-speed coal mill reducer also includes: a guide plate 23, a baffle 24 and a return hole 25; the guide plate 23 is embedded in the return oil sealing cover 19, and the guide plate 23 is connected to the outer wall of the oil slinger 20; two baffles 24 are embedded in the return oil sealing cover 19, the two baffles 24 are connected to the inner wall of the return oil sealing cover 19, and the two baffles 24 are located on both sides of the guide plate 23; the return hole 25 is arranged at the bottom of the baffle 24; wherein, one end of the return oil pipe 21 is located between the two baffles 24.

[0035] By connecting the guide plate 23 to the outer wall of the oil slinger 20, the oil slinger 20 can drive the guide plate 23 to rotate, so that the lubricating oil on the oil slinger 20 can be slung outward along the guide plate 23; by connecting the two baffles 24 to the inner wall of the oil return sealing cover 19, the two baffles 24 are located on both sides of the guide plate 23, and one end of the oil return pipe 21 is located between the two baffles 24, so that the two baffles 24 can block the lubricating oil slung out by the guide plate 23, so as to ensure that the lubricating oil flows into the oil return pipe 21, so that the lubricating oil can flow back to the box 10, so as to improve the product use experience. By setting the reflux hole 25 at the bottom of the baffle 24, the lubricating oil flowing to the outside of the baffle 24 can flow between the two baffles 24 through the reflux hole 25, so that the lubricating oil can flow into the oil return pipe 21.

[0036] In the embodiment of the present utility model, Figures 1 to 3 As shown, the sun shaft assembly 13 includes: an intermediate shaft 131, a gear sleeve 132 and a sun shaft body 133; a third external tooth is arranged on the outer wall of the intermediate shaft 131, the intermediate shaft 131 is rotatably connected to the housing 10, and the second bevel gear 14 is sleeved on the outer side of the intermediate shaft 131; the gear sleeve 132 is a hollow cavity with openings at both ends, and a second internal tooth is arranged on the inner wall of the gear sleeve 132, the gear sleeve 132 is wound around the outer side of the intermediate shaft 131, and the second internal tooth of the gear sleeve 132 is meshed with the third external tooth of the intermediate shaft 131; one end of the sun shaft body 133 is embedded between the three planetary gears 16, the first external tooth is arranged on the outer wall of one end of the sun shaft body 133, the other end of the sun shaft body 133 is embedded in the gear sleeve 132, the third external tooth is arranged on the outer wall of the other end of the sun shaft body 133, and the third external tooth of the sun shaft body 133 is meshed with the second internal tooth of the gear sleeve 132.

[0037] By sleeved the second bevel gear 14 on the outside of the intermediate shaft 131, the input shaft 11 can drive the intermediate shaft 131 to rotate through the first bevel gear 12 and the second bevel gear 14. By embedding the sun shaft body 133 between the three planetary gears 16, the first external tooth is set on the outer wall of one end of the sun shaft, so that when the sun shaft body 133 rotates, the sun shaft body 133 can drive the three planetary gears 16 to rotate along the inner wall of the gear ring 15. By embedding the other ends of the intermediate shaft 131 and the sun shaft body 133 into the gear sleeve 132, the third external tooth of the intermediate shaft 131 is meshed with the second internal tooth of the gear sleeve 132, and the third external tooth of the sun shaft body 133 is meshed with the second internal tooth of the gear sleeve 132, so that when the intermediate shaft 131 rotates, the intermediate shaft 131 can drive the gear sleeve 132 to rotate, and the gear sleeve 132 can drive the sun shaft body 133 to rotate, so that the intermediate shaft 131, the gear sleeve 132 and the sun shaft body 133 can rotate synchronously.

[0038] By adopting the above structure, the intermediate shaft 131, the gear sleeve 132 and the sun shaft body 133 are rotated synchronously, and the intermediate shaft 131, the gear sleeve 132 and the sun shaft body 133 are divided into three separate components. Therefore, compared with setting the intermediate shaft 131 and the sun shaft body 133 as an integral component, and the intermediate shaft 131 and the sun shaft body 133 require a longer length, the processing difficulty of the intermediate shaft 131 and the sun shaft is smaller. At the same time, it is easier to install the intermediate shaft 131 and the sun shaft in the box body 10, thereby improving the assembly efficiency of the product and enhancing the product usage experience.

[0039] In the embodiment of the present utility model, Figures 1 to 3 As shown, the medium-speed coal mill reducer also includes: a first spherical top 26 and a second spherical top 27; the first spherical top 26 is arc-shaped, connected to one end of the sun shaft body 133, and the first spherical top 26 is fitted with the planetary carrier 17; the second spherical top 27 is arc-shaped, connected to the other end of the sun shaft body 133, and the second spherical top 27 is fitted with the intermediate shaft 131.

[0040] By connecting the arc-shaped first spherical top 26 and the second spherical top 27 to the two ends of the sun shaft body 133 respectively, the first spherical top 26 is fitted with the planetary carrier 17, and the second spherical top 27 is fitted with the intermediate shaft 131, so as to reduce the contact area between the sun shaft body 133 and the planetary carrier 17 and the intermediate shaft 131, thereby avoiding the situation where the sun shaft body 133 is damaged due to excessive contact area between the sun shaft body 133 and the planetary carrier 17 and the intermediate shaft 131; moreover, even if the first spherical top 26 and the second spherical top 27 are damaged, it is only necessary to replace the first spherical top 26 or the second spherical top 27, so there is no need to replace the sun shaft body 133, so as to reduce the maintenance cost of the product.

[0041] In the embodiments of the present invention, Figures 1 to 3 As shown, the medium-speed coal mill reducer further includes: a clearance groove 28 ; the clearance groove 28 is arranged in the planetary carrier 17 , and the clearance groove 28 is arranged around the outer side of the first spherical top 26 .

[0042] The clearance groove 28 is arranged in the planet carrier 17 and around the outer side of the first spherical top 26 to avoid the first spherical top 26 from contacting the planet carrier 17 and thus avoiding damage to the first spherical top 26, thereby improving product quality.

[0043] In the embodiments of the present invention, Figures 1 to 3 As shown, the medium-speed coal mill reducer also includes: a connecting groove 29 and an output flange 30; the connecting groove 29 is arranged at the other end of the input shaft 11, and the connecting groove 29 is located on the outside of the return oil sealing cover 19; the output flange 30 is connected to the other end of the output shaft 18, and the output flange 30 is located on the outside of the casing 10.

[0044] By setting the connecting groove 29 at the other end of the input shaft 11 and making the connecting groove 29 located on the outside of the oil return sealing cover 19, the driving device can be connected to the input shaft 11 through the connecting groove 29, so as to reduce the difficulty of connecting the input shaft 11 with the driving device, thereby improving the use experience of the product; by connecting the output flange 30 with the other end of the output shaft 18 and making the output flange 30 located on the outside of the box body 10, the output shaft 18 can be connected to the load device through the output flange 30, so as to reduce the difficulty of connecting the load device with the output shaft 18, thereby improving the use experience of the product.

[0045] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the description of the present invention, the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A medium speed coal mill reducer, characterized in that: The medium speed coal mill reducer comprises: A box body, wherein the box body is a hollow cavity; An input shaft, the input shaft passes through a side wall of the housing, the input shaft is rotatably connected to the housing, one end of the input shaft is located inside the housing, and the other end of the input shaft is located outside the housing; A first bevel gear, wherein the first bevel gear is embedded in the housing and connected to the input shaft; A sun shaft assembly, wherein the sun shaft assembly is embedded in the housing, the sun shaft assembly is rotatably connected to the housing, and an outer wall of one end of the sun shaft assembly is provided with a first outer tooth; A second bevel gear, wherein the second bevel gear is sleeved on the outside of the sun shaft assembly and meshes with the first bevel gear; A gear ring, wherein a first internal tooth is disposed in the gear ring, the gear ring is installed in the housing, and the gear ring is wound around the outside of the sun shaft assembly; Planetary gears, wherein second external teeth are arranged on the outer walls of the planetary gears, three of the planetary gears are embedded in the gear ring, and the second external teeth of the three planetary gears are meshed with the first external teeth of the sun shaft assembly and the first internal teeth of the gear ring at the same time; A planet carrier, the planet carrier being rotationally connected to the three planetary gears at the same time; An output shaft, one end of which is connected to the planet carrier, and the other end of which passes through the housing; An oil return sealing cover, the oil return sealing cover is a hollow cavity, the oil return sealing cover is connected to the side wall of the box body, and the oil return sealing cover is wound around the outside of the input shaft; An oil slinger ring, wherein the oil slinger ring is sleeved on the outer side of the input shaft, and at least a part of the oil slinger ring is embedded in the oil return sealing cover; An oil return pipe, one end of which is connected to the bottom of the oil return sealing cover, and the other end of which is connected to the box body.

2. A medium speed coal mill reducer according to claim 1, characterized in that: The medium speed coal mill reducer also includes: A sealing ring, which is an elastic body, is sleeved on the outside of the oil slinger ring, and is embedded in the oil return sealing cover; Wherein, one end of the oil return pipe is located above the other end of the oil return pipe.

3. A medium speed coal mill reducer according to claim 2, characterized in that: The medium speed coal mill reducer also includes: A guide plate, wherein the guide plate is embedded in the oil return sealing cover and connected to the outer wall of the oil slinger; Baffles, two of the baffles are embedded in the oil return sealing cover, the two baffles are connected to the inner wall of the oil return sealing cover, and the two baffles are located on both sides of the guide plate; A reflux hole, the reflux hole being arranged at the bottom of the baffle; Wherein, one end of the oil return pipe is located between the two baffles.

4. A medium speed coal mill reducer according to claim 1, characterized in that: The sun shaft assembly comprises: An intermediate shaft, wherein the outer wall of the intermediate shaft is provided with third external teeth, the intermediate shaft is rotatably connected to the housing, and the second bevel gear is sleeved on the outer side of the intermediate shaft; A gear sleeve, wherein the gear sleeve is a hollow cavity with openings at both ends, and a second inner tooth is arranged on the inner wall of the gear sleeve. The gear sleeve is wound around the outer side of the intermediate shaft, and the second inner tooth of the gear sleeve is meshed with the third outer tooth of the intermediate shaft; A sun shaft body, one end of the sun shaft body is embedded between the three planetary gears, the first external tooth is arranged on the outer wall of one end of the sun shaft body, the other end of the sun shaft body is embedded in the gear sleeve, the third external tooth is arranged on the outer wall of the other end of the sun shaft body, and the third external tooth of the sun shaft body is meshed with the second internal tooth of the gear sleeve.

5. A medium speed coal mill reducer according to claim 4, characterized in that: The medium speed coal mill reducer also includes: A first spherical top, which is in an arc shape, connected to one end of the sun shaft body, and fits with the planet carrier; The second spherical top is in an arc shape, the second spherical top is connected to the other end of the sun shaft body, and the second spherical top is in contact with the intermediate shaft.

6. A medium speed coal mill reducer according to claim 5, characterized in that: The medium speed coal mill reducer also includes: The make way groove is arranged in the planet carrier and is arranged around the outer side of the first spherical top.

7. A medium speed coal mill reducer according to claim 6, characterized in that: The medium speed coal mill reducer also includes: A connecting groove, the connecting groove is arranged at the other end of the input shaft, and the connecting groove is located on the outer side of the oil return sealing cover; An output flange is connected to the other end of the output shaft and is located outside the box body.

Images