Vertical speed reducer and upper shaft leakage-proof sealing device thereof

Abstract

The application discloses a vertical speed reducer and a leakage-proof sealing device for an upper output shaft thereof, which comprises a shell and fixed plates fixed at two ends of the shell, output and input shells fixed through the two fixed plates respectively, outer support rings arranged at two ends of the output and input shells, fixed bearings fixed through the middle of the outer support rings, inner support rings fixed through the middle of the fixed bearings, an input shaft fixed through the middle of two inner support rings, a pinion arranged at one end of the input shaft, an output shaft fixed through the middle of the other two inner support rings, and a gear wheel arranged at one end of the output shaft. The edge of the centrifugal ring is abutted against the inner side of the inclined ring. When the centrifugal ring and the input shaft rotate at high speed, the centrifugal force of the centrifugal ring makes the periphery of the centrifugal ring expand outward, the normal pressure of the centrifugal ring on the inner side of the inclined ring is increased, the normal pressure of the centrifugal ring on the inclined ring is increased through the centrifugal force, the sealing property between the centrifugal ring and the inclined ring is increased, and the application has the advantage of good sealing property.

Description

Technical Field

[0001] This invention relates to the field of vertical speed reducer technology, and in particular to a vertical speed reducer and its upper output shaft anti-leakage sealing device. Background Technology

[0002] Vertical reducers reduce power by meshing two gears of different diameters, while increasing the output torque. However, existing vertical reducers generally use sealed bearings for sealing, which are either metal or rubber seals. Due to insufficient positive pressure of the sealing components, the sealing capacity of the sealing components is insufficient, and the problem of preventing the leakage of lubricating oil inside the housing cannot be guaranteed. Therefore, there is a need to provide a vertical reducer and its output shaft anti-leakage sealing device. Summary of the Invention

[0003] The purpose of this invention is to solve the problem in the prior art where sealing is achieved through sealed bearings, which use metal or rubber seals. However, due to insufficient positive pressure of the sealing components, the sealing capacity of the sealing components is insufficient. Therefore, this invention proposes a vertical reducer and its upper output shaft anti-leakage sealing device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a vertical reducer, comprising a housing and fixed plates fixed at both ends thereof, an output housing and an input housing respectively being fixedly inserted through the two fixed plates, an outer support ring being nested at both ends of the output housing and the input housing, a fixed bearing being fixedly inserted through the middle of the outer support ring, an inner support ring being fixedly inserted through the middle of the fixed bearing, an input shaft being fixedly inserted through the middle of two inner support rings, a small gear being nested at one end of the input shaft, and an output shaft being fixedly inserted through the middle of the other two inner support rings, a large gear being nested at one end of the output shaft, and the large gear meshing with the small gear.

[0005] A leak-proof sealing device for an upper output shaft includes two integrally formed limiting rings in the middle of both the input and output shafts, two movably fitted rubber rings in the middle of both the input and output shafts, two external threads in the middle of both the input and output shafts, two limiting plates and two sealing rings threaded into the middle of the threads of both the input and output shafts, a centrifugal ring provided in the gap between the limiting plates and the sealing rings, a negative pressure ring nested between the two sealing rings, an arc-shaped ring nested inside the negative pressure ring, multiple threaded bolts embedded in the surface threads of the sealing rings, and a pressing ring installed on the surface of the sealing rings through the threaded bolts. Two inclined rings are nested in the inner walls of the output shell and the input shell.

[0006] More preferably, the sealing ring has multiple threaded holes on its side, an adsorption groove on its side, and a pin groove on its side.

[0007] More preferably, the end of the negative pressure ring is matched with the pin groove of the sealing ring, the threaded bolt is matched with the threaded hole of the sealing ring, and the centrifugal ring abuts against the side of the adsorption groove.

[0008] More preferably, the outer side of the centrifugal ring is truncated cone-shaped and tilted, the tilt angle of the tilted ring is consistent with the tilt angle of the centrifugal ring, and the tilted position of the centrifugal ring is fitted inside the tilted ring.

[0009] More preferably, one end of the adsorption groove is circular and surrounds the side of the centrifugal ring, while the other end of the adsorption groove has eight through holes, so that one side of the sealing ring is provided with eight connecting parts, and the eight connecting parts are located at the other end of the adsorption groove.

[0010] More preferably, the pressing ring surrounds the outer periphery of the negative pressure ring, the middle of the negative pressure ring is concave outward, and the arc-shaped ring is located in the concave part of the middle of the negative pressure ring.

[0011] More preferably, the rubber ring is located in the gap between the limiting ring and the sealing ring, the negative pressure ring surrounds the periphery of the adsorption groove, and the inner edge of the pressing ring is arc-shaped.

[0012] More preferably, the limiting ring, rubber ring, sealing ring, centrifugal ring, tilting ring, negative pressure ring, pressing ring, threaded bolt, and limiting plate are all located in the middle of the two fixed bearings, and an annular space is formed between the arc ring and the negative pressure ring.

[0013] Beneficial effects:

[0014] 1. The edge of the centrifugal ring rests against the inner side of the inclined ring. When the centrifugal ring and the input shaft rotate at high speed, the centrifugal force of the centrifugal ring causes its outer periphery to expand outward, increasing the positive pressure of the centrifugal ring on the inner side of the inclined ring. By increasing the positive pressure of the centrifugal ring on the inclined ring through centrifugal force, the sealing performance between the centrifugal ring and the inclined ring can be greatly increased, which has the advantage of good sealing performance.

[0015] 2. The negative pressure ring is surrounded by two sealing rings. The input shaft, negative pressure ring, and two sealing rings rotate at high speed, which generates a large centrifugal force on the negative pressure ring. The negative pressure ring will be concave outward, and a negative pressure will be generated between the two negative pressure rings. This will cause the suction groove of the sealing ring to generate a suction force on the centrifugal ring, which will increase the positive pressure of the centrifugal ring on the sealing ring, thereby increasing the sealing performance between the centrifugal ring and the sealing ring. It has the advantage of good sealing performance.

[0016] 3. The suction force of the adsorption tank acts on the centrifuge ring, which can counteract the stress when the centrifuge ring expands, so that the centrifuge ring expands outward stably and the inner side of the centrifuge ring is stably supported. The centrifuge ring is under stable force, and there is a good seal between the edge of the centrifuge ring and the inclined ring. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the input shaft structure of the present invention;

[0019] Figure 3 This is a disassembly diagram of the input shaft of the present invention;

[0020] Figure 4 This is a schematic diagram of the centrifuge coil of the present invention;

[0021] Figure 5 This is a cross-sectional schematic diagram of the input shaft of the present invention;

[0022] Figure 6 This is a front view of the sealing ring of the present invention;

[0023] Figure 7 This is a schematic diagram of the back side of the sealing ring of the present invention;

[0024] Figure 8 This is a schematic diagram of the negative pressure ring of the present invention.

[0025] In the diagram: 1. Outer shell; 2. Fixing plate; 3. Output shell; 4. Outer support ring; 5. Fixing bearing; 6. Inner support ring; 7. Input shaft; 8. Pinion; 9. Output shaft; 10. Large gear; 11. Limiting ring; 12. Rubber ring; 13. Sealing ring; 14. Centrifugal ring; 15. Inclined ring; 16. Negative pressure ring; 17. Pressing ring; 18. Threaded bolt; 19. Limiting plate; 20. External thread; 21. Threaded hole; 22. Pin groove; 23. Adsorption groove; 24. Arc ring; 25. Input shell. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Reference Figures 1 to 8 This embodiment provides a vertical reducer, including a housing 1 and fixed plates 2 fixed at both ends. An output housing 3 and an input housing 25 are respectively fixed through the two fixed plates 2. An outer support ring 4 is nested at both ends of the output housing 3 and the input housing 25. A fixed bearing 5 is fixed through the middle of the outer support ring 4. An inner support ring 6 is fixed through the middle of the fixed bearing 5. An input shaft 7 is fixed through the middle of the two inner support rings 6. A small gear 8 is nested at one end of the input shaft 7. An output shaft 9 is fixed through the middle of the other two inner support rings 6. A large gear 10 is nested at one end of the output shaft 9, and the large gear 10 meshes with the small gear 8.

[0028] In practice, the input shaft 7 is powered to rotate at high speed, which drives the small gear 8 to rotate at high speed. The small gear 8 drives the large gear 10 to rotate, so that the output shaft 9 and the large gear 10 rotate synchronously. Since the diameter of the large gear 10 is larger than the diameter of the small gear 8, the torque of the output shaft 9 is greater than the torque of the input shaft 7, and the speed of the output shaft 9 is less than the speed of the input shaft 7, thus completing the deceleration work.

[0029] Furthermore,

[0030] This embodiment also provides an upper output shaft anti-leakage sealing device. The input shaft 7 and the output shaft 9 are both integrally formed with two limiting rings 11 in the middle. The input shaft 7 and the output shaft 9 are both movably sleeved with two rubber rings 12 in the middle. The input shaft 7 and the output shaft 9 are provided with two external threads 20 in the middle. The input shaft 7 and the output shaft 9 are threadedly sleeved with two limiting plates 19 and two sealing rings 13 in the middle. A centrifugal ring 14 is provided in the gap between the limiting plates 19 and the sealing rings 13. A negative pressure ring 16 is nested between the two sealing rings 13. An arc ring 24 is nested inside the negative pressure ring 16. Multiple threaded bolts 18 are threadedly embedded on the surface of the sealing ring 13. A pressing ring 17 is installed on the surface of the sealing ring 13 through the threaded bolts 18. Two inclined rings 15 are nested on the inner walls of the output shell 3 and the input shell 25.

[0031] Preferably, the limiting ring 11, rubber ring 12, sealing ring 13, centrifugal ring 14, tilting ring 15, negative pressure ring 16, pressing ring 17, threaded bolt 18, and limiting plate 19 are all located in the middle of the two fixed bearings 5. An annular space is formed between the arc ring 24 and the negative pressure ring 16. The side of the sealing ring 13 is provided with multiple threaded holes 21, the side of the sealing ring 13 is provided with an adsorption groove 23, and the side of the sealing ring 13 is provided with a pin groove 22. The end of the negative pressure ring 16 is matched with the pin groove 22 of the sealing ring 13. The threaded bolt 18 is matched with the threaded hole 21 of the sealing ring 13. The centrifugal ring 14 abuts against the side of the adsorption groove 23.

[0032] In practice, the negative pressure ring 16 surrounds the two sealing rings 13. The input shaft 7, the negative pressure ring 16, and the two sealing rings 13 rotate at high speed, causing the negative pressure ring 16 to generate a large centrifugal force. The negative pressure ring 16 will be concave outward, and a negative pressure will be generated between the two negative pressure rings 16. This will cause the suction groove 23 of the sealing ring 13 to exert a suction force on the centrifugal ring 14, increasing the positive pressure of the centrifugal ring 14 on the sealing ring 13 and increasing the sealing performance between the centrifugal ring 14 and the sealing ring 13. The suction force of the suction groove 23 on the centrifugal ring 14 can counteract the stress when the centrifugal ring 14 expands, allowing the centrifugal ring 14 to expand outward stably and providing stable support to the inner side of the centrifugal ring 14. The centrifugal ring 14 is under stable force, and the edge of the centrifugal ring 14 has a good seal with the inclined ring 15.

[0033] Preferably, the outer side of the centrifugal ring 14 is truncated cone-shaped and tilted, the tilt angle of the tilt ring 15 is the same as the tilt angle of the centrifugal ring 14, the tilt position of the centrifugal ring 14 is fitted inside the tilt ring 15, one end of the adsorption groove 23 is circular, one end of the adsorption groove 23 surrounds the side of the centrifugal ring 14, and the other end of the adsorption groove 23 has eight through holes, so that one side of the sealing ring 13 is provided with eight connecting parts, and the eight connecting parts are located at the other end of the adsorption groove 23.

[0034] In practice, the edge of the centrifugal ring 14 abuts against the inner side of the inclined ring 15. When the centrifugal ring 14 and the input shaft 7 rotate at high speed, the centrifugal force of the centrifugal ring 14 causes its outer periphery to expand outward, and the positive pressure of the centrifugal ring 14 on the inner side of the inclined ring 15 increases. By increasing the positive pressure of the centrifugal ring 14 on the inclined ring 15 through centrifugal force, the sealing between the centrifugal ring 14 and the inclined ring 15 can be greatly increased.

[0035] Preferably, the pressing ring 17 surrounds the outer periphery of the negative pressure ring 16, with the center of the negative pressure ring 16 concave outwards. The arc-shaped ring 24 is located in the concave part of the center of the negative pressure ring 16, supporting the center of the negative pressure ring 16. This increases the mass of the center of the negative pressure ring 16, thereby increasing the centrifugal force on the negative pressure ring 16. The cavity inside the arc-shaped ring 24 and the negative pressure ring 16 can be compressed, increasing the elasticity of the center of the negative pressure ring 16. Furthermore, the elastic force of the arc-shaped ring 24 acts on the center of the negative pressure ring 16, giving the center of the negative pressure ring 16 excellent elasticity and ensuring that the negative pressure ring 16 quickly returns to its original position after being subjected to centrifugal force.

[0036] Preferably, the rubber ring 12 is located in the gap between the limiting ring 11 and the sealing ring 13, the negative pressure ring 16 surrounds the periphery of the adsorption groove 23, the inner edge of the pressing ring 17 is arc-shaped, the sealing ring 13 rotates and approaches the limiting ring 11, the sealing ring 13 squeezes the rubber ring 12, so that the rubber ring 12 is tightly attached to the gap between the limiting ring 11 and the sealing ring 13, and the rubber ring 12 can increase the sealing between the limiting ring 11 and the sealing ring 13.

[0037] The pressing ring 17 rests against the end of the negative pressure ring 16. When the negative pressure ring 16 expands under centrifugal force, it rests against the arc on the inner side of the pressing ring 17 to prevent the negative pressure ring 16 from rubbing against the edge of the sealing ring 13 and to increase the service life of the negative pressure ring 16.

[0038] The limiting plate 19 is pressed against the middle of the centrifugal ring 14, so that the limiting plate 19 is always pressed on the sealing ring 13. The limiting plate 19 can press the inner side of the centrifugal ring 14 to prevent the inner side of the centrifugal ring 14 from lifting up when it is deformed by centrifugal force, and ensure that the outer side of the centrifugal ring 14 is stably expanded and pressed against the inner side of the inclined ring 15.

[0039] The negative pressure ring 16 is inserted into the pin groove 22 of the sealing ring 13, and the negative pressure ring 16 is fixed to the pin groove 22 by adhesive, so that the negative pressure ring 16 is firmly fixed in the pin groove 22 of the sealing ring 13, and the sealing performance between the negative pressure ring 16 and the sealing ring 13 is ensured, and the negative pressure cavity formed between the two sealing rings 13 is ensured.

[0040] One end of the adsorption tank 23 is annular, and the other end of the adsorption tank 23 is provided with eight connecting parts. The connecting parts fix the inner and outer rings of the sealing ring 13. One end of the adsorption tank 23 makes its suction force on the centrifugal ring 14 uniform, ensuring that the suction force on the inner side of the centrifugal ring 14 is uniform.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A vertical speed reducer, comprising a housing (1) and fixed plates (2) fixed at both ends thereof, wherein an output housing (3) and an input housing (25) are respectively fixed through the two fixed plates (2), characterized in that: Both ends of the output shell (3) and the input shell (25) are nested with outer support rings (4), and a fixed bearing (5) is fixed through the middle of the outer support ring (4). An inner support ring (6) is fixed through the middle of the fixed bearing (5). An input shaft (7) is fixed through the middle of the two inner support rings (6) at both ends of the input shell. A small gear (8) is nested at one end of the input shaft (7). An output shaft (9) is fixed through the middle of the two inner support rings (6) at both ends of the output shell. A large gear (10) is nested at one end of the output shaft (9), and the large gear (10) meshes with the small gear (8). It also includes an upper output shaft anti-leakage sealing device. The input shaft (7) and the output shaft (9) are integrally formed with two limiting rings (11). The input shaft (7) and the output shaft (9) are movably sleeved with two rubber rings (12). The input shaft (7) and the output shaft (9) have two external threads (20) in the middle. The input shaft (7) and the output shaft (9) are threaded with two limiting plates (19) and two sealing rings (13). A centrifugal ring (14) is provided in the gap between the limiting plate (19) and the sealing ring (13). A negative pressure ring (16) is nested between the two sealing rings (13). An arc ring (24) is nested inside the negative pressure ring (16). Multiple threaded bolts (18) are embedded in the surface of the sealing ring (13). A pressing ring (17) is installed on the surface of the sealing ring (13) through the threaded bolts (18). Two inclined rings (15) are nested in the inner walls of the output shell (3) and the input shell (25). The limiting ring (11), rubber ring (12), sealing ring (13), centrifugal ring (14), tilting ring (15), negative pressure ring (16), pressing ring (17), threaded bolt (18), and limiting plate (19) are all located in the middle of the two fixed bearings (5), and an annular space is formed between the arc ring (24) and the negative pressure ring (16).

2. The vertical reducer according to claim 1, characterized in that, The sealing ring (13) has multiple threaded holes (21) on its side, an adsorption groove (23) on its side, and a pin groove (22) on its side.

3. The vertical reducer according to claim 2, characterized in that, The end of the negative pressure ring (16) is matched with the pin groove (22) of the sealing ring (13), the threaded bolt (18) is matched with the threaded hole (21) of the sealing ring (13), and the centrifugal ring (14) abuts against the side of the adsorption tank (23).

4. The vertical reducer according to claim 2, characterized in that, The outer side of the centrifugal ring (14) is shaped like a frustum and is tilted. The tilt angle of the tilt ring (15) is the same as that of the centrifugal ring (14). The tilt position of the centrifugal ring (14) is inside the tilt ring (15).

5. The vertical reducer according to claim 4, characterized in that, One end of the adsorption groove (23) is circular and surrounds the side of the centrifugal ring (14). The other end of the adsorption groove (23) has eight through holes, so that one side of the sealing ring (13) is provided with eight connecting parts, and the eight connecting parts are located at the other end of the adsorption groove (23).

6. The vertical reducer according to claim 2, characterized in that, The pressing ring (17) surrounds the outer periphery of the negative pressure ring (16), the middle of the negative pressure ring (16) is concave outward, and the arc ring (24) is located in the concave part of the middle of the negative pressure ring (16).

7. The vertical reducer according to claim 2, characterized in that, The rubber ring (12) is located in the gap between the limiting ring (11) and the sealing ring (13), the negative pressure ring (16) surrounds the periphery of the adsorption groove (23), and the inner edge of the pressing ring (17) is arc-shaped.

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