Oil leakage prevention speed reducer

Abstract

The speed reducer comprises an input shaft and an output shaft which are arranged in a shell in a rotating mode and are perpendicular to each other, the input shaft and the output shaft are coaxially sleeved with sealing sleeves, conical sealing rings are arranged on the two sides of the edge of an inner ring of an annular sealing seat respectively, and each conical sealing ring is sleeved with a conical sleeve. Elastic structures are arranged between the conical sleeve and the annular blocking base and between the conical sleeve and the annular cover, and the conical sleeve is pushed by the elastic structures so that the conical sealing ring can contract in the direction of the input shaft and the direction of the output shaft. When the sealing device is used, the sealing sleeves are arranged on the input shaft and the output shaft, the annular sealing seats are arranged in the sealing sleeves, the conical sealing rings are arranged on the two sides of the edge of the inner ring of each annular sealing seat respectively, and the conical sealing rings can tightly hold the input shaft and the output shaft under the pushing of continuous pressure of the conical sleeves. And the input shaft and the output shaft cannot leak after being used for a long time.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically to a leak-proof speed reducer. Background Technology

[0002] A speed reducer is an independent component consisting of gear transmission, worm transmission, or gear-worm transmission enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between the prime mover and the working machine. The speed reducer plays the role of matching speed and transmitting torque between the prime mover and the working machine or actuator.

[0003] Oil leakage in speed reducers often occurs at the input and output shafts. During prolonged operation, the input and output shafts continuously rub against the oil seals, causing wear and leading to leakage. The most common cause is poor sealing performance of the oil seals. Therefore, we propose an oil-leak-proof speed reducer. Utility Model Content

[0004] This utility model provides an oil-leakage-proof speed reducer, which features a new sealing structure designed at the output shaft and input shaft, ensuring that the output shaft and input shaft will not leak even after long-term use, thus solving the problems mentioned in the background art.

[0005] The technical solution of this utility model is implemented as follows: A leak-proof reducer is designed, including a housing. An input shaft and an output shaft are rotatably arranged inside the housing and are perpendicular to each other. The input shaft and the output shaft are connected by a gear transmission device. Both the input shaft and the output shaft are coaxially fitted with sealing sleeves. One end of the sealing sleeve is connected to the housing, and the other end is provided with an annular cover. An annular stop is coaxially provided inside the sealing sleeve near the housing. An annular sealing seat is provided inside the sealing sleeve and fits on the input shaft and the output shaft. Conical sealing rings are provided on both sides of the inner ring edge of the annular sealing seat. A conical sleeve is fitted on each conical sealing ring. An elastic structure is provided between the conical sleeve and the annular stop and between the conical sleeve and the annular cover. Under the push of the elastic structure, the conical sealing ring contracts towards the input shaft and the output shaft.

[0006] Preferably, the conical sealing ring and the inner wall of the annular sealing seat are provided with multiple sealing rings.

[0007] Preferably, the sealing sleeve is provided with a blocking step, the annular sealing seat is placed at the blocking step, and a limiting flange is provided on the side of the annular cover near the annular sealing seat. The annular cover and the sealing sleeve are detachably connected. When the annular cover is installed on the end of the sealing sleeve, the limiting flange is placed inside the sealing sleeve, and the limiting flange and the blocking step form a cavity for accommodating the annular sealing seat.

[0008] Preferably, the sealing sleeve has an annular edge on the side near the housing, the annular edge is detachably connected to the housing, the inner edge of the annular edge has a sealing groove, and the sealing groove has an annular sealing ring.

[0009] Preferably, the elastic structure includes compression springs located between the conical sleeve and the annular stop and between the conical sleeve and the annular cover. The compression springs are respectively sleeved on the input shaft and the output shaft. Each conical sleeve has a retaining ring on its outside. The two ends of the compression springs are in elastic contact with the retaining ring, the annular cover and the annular stop, respectively.

[0010] Preferably, annular spring seats are coaxially provided on the side opposite to the retaining ring and the annular cover, as well as on the side opposite to the retaining ring and the annular stop seat, and the two ends of the compression spring are respectively sleeved on the annular spring seats or placed inside the annular spring seats.

[0011] Preferably, the gear transmission device includes a first bevel gear mounted on the end of the input shaft, one side of the first bevel gear being perpendicularly connected to a second bevel gear, and the second bevel gear being mounted on a first mounting shaft.

[0012] A first transmission gear is also mounted on the first mounting shaft. One side of the first transmission gear meshes with a second transmission gear. The second transmission gear is mounted on the second mounting shaft. A third transmission gear is also provided on the second mounting shaft. One side of the third transmission gear meshes with a fourth transmission gear. The fourth transmission gear is mounted on the output shaft. The first mounting shaft, the second mounting shaft, and the output shaft are parallel, and the housing is provided with mounting holes corresponding to the input shaft, the first mounting shaft, the second mounting shaft, and the output shaft, respectively. The input shaft, the first mounting shaft, the second mounting shaft, and the output shaft are all rotatably mounted in the mounting holes. Both ends of the first mounting shaft and the second mounting shaft, as well as the end of the output shaft away from the sealing sleeve, are provided with sealing end caps. The edges of the sealing end caps are detachably connected to the housing.

[0013] Preferably, a cover is detachably installed on the top of the housing.

[0014] Preferably, the bottom edge of the housing is provided with multiple supports.

[0015] Compared with existing technologies, this invention seals both ends of all shafts except the input and output shafts with end caps, ensuring no leakage during daily use. Seal sleeves are also provided on the input and output shafts, each containing an annular sealing seat. Conical sealing rings are located on both sides of the inner edge of the annular sealing seat. Under the continuous pressure of the conical sleeves, the conical sealing rings tightly grip the input and output shafts, preventing leakage even after prolonged use. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0019] Figure 3 This is a top view of the present invention.

[0020] Figure 4 This is a schematic diagram showing the structure of the sealing sleeve of this utility model in relation to the input shaft and the output shaft.

[0021] In the diagram: 1. Housing; 2. Sealing end cap; 3. Support; 4. Input shaft; 5. Annular cover; 6. Sealing sleeve; 7. Annular edge; 8. Housing cover; 9. Output shaft; 10. Second transmission gear; 11. Second bevel gear; 12. Third transmission gear; 13. Fourth transmission gear; 14. Annular sealing seat; 15. First transmission gear; 16. First mounting shaft; 17. First bevel gear; 18. Second mounting shaft; 19. Annular spring seat; 20. Conical sealing ring; 21. Sealing ring; 22. Conical sleeve; 23. Compression spring; 24. Retaining ring; 25. Annular retaining seat; 26. Annular sealing ring; 27. Sealing groove; 28. Blocking step; 29. ​​Limiting flange. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figures 1 to 4 This utility model provides a technical solution: an oil-leakage-proof reducer, including a housing 1, a housing cover 8 detachably installed on the top of the housing 1, the housing cover 8 being fastened to the housing 1 by bolts, and a plurality of supports 3 provided on the bottom edge of the housing 1 for fixing the housing 1.

[0024] An input shaft 4 and an output shaft 9 are rotatably mounted inside the housing 1, perpendicular to each other. Both the input shaft 4 and the output shaft 9 are fitted with sealing sleeves 6. The two ends of the input shaft 4 and the output shaft 9 are located on the inner and outer sides of the housing 1. The input shaft 4 and the output shaft 9 are connected by a gear transmission device. The input shaft 4 is connected to a drive motor, which drives the input shaft 4. The input shaft 4, through the gear transmission device, drives the output shaft 9 to rotate, thus the motor torque is output outward through the output shaft 9.

[0025] The following is a detailed introduction to gear transmission devices, such as... Figure 2 and Figure 3 As shown, the gear transmission device includes a first bevel gear 17 mounted on the end of the input shaft 4. One side of the first bevel gear 17 is perpendicularly connected to the second bevel gear 11. The second bevel gear 11 is mounted on the first mounting shaft 16. The diameter of the first bevel gear 17 is smaller than the diameter of the second bevel gear 11. The rotational speed input through the input shaft 4 is reduced for the first time through the second bevel gear 11 and the first bevel gear 17.

[0026] A first transmission gear 15 is also mounted on the first mounting shaft 16. One side of the first transmission gear 15 meshes with the second transmission gear 10. The second transmission gear 10 is mounted on the second mounting shaft 18. The diameter of the first transmission gear 15 is smaller than the diameter of the second transmission gear 10. The rotational speed input through the input shaft 4 is reduced for the second time through the first transmission gear 15 and the second transmission gear 10.

[0027] A third transmission gear 12 is also provided on the second mounting shaft 18. One side of the third transmission gear 12 meshes with a fourth transmission gear 13. The fourth transmission gear 13 is mounted on the output shaft 9. The diameter of the third transmission gear 12 is smaller than the diameter of the fourth transmission gear 13. The rotational speed input through the input shaft 4 undergoes a third reduction through the third transmission gear 12 and the fourth transmission gear 13. Thus, the rotational speed input from the direction of the input shaft 4 is continuously output from the output shaft 9 after three reductions.

[0028] It should be noted that the first mounting shaft 16, the second mounting shaft 18, and the output shaft 9 are arranged in parallel. During actual installation, mounting holes corresponding to the input shaft 4, the first mounting shaft 16, the second mounting shaft 18, and the output shaft 9 need to be provided on the housing 1. Then, the input shaft 4, the first mounting shaft 16, the second mounting shaft 18, and the output shaft 9 are rotatably installed in these mounting holes, i.e., installed via bearings. These mounting holes match the shape of the bearings, and after each shaft is installed, the ends of the mounting holes are sealed with sealing rings. To further improve sealing, such as... Figure 1As shown, sealing end caps 2 are provided at both ends of the first mounting shaft 16 and the second mounting shaft 18, as well as at the end of the output shaft 9 away from the sealing sleeve 6. The edge of the sealing end cap 2 is detachably connected to the housing 1, that is, the edge of the sealing end cap 2 is fastened to the housing 1 by bolts, and a sealing ring is provided at the edge of the sealing end cap 2. In this way, both ends of the first mounting shaft 16 and the second mounting shaft 18, as well as the end of the output shaft 9 away from the sealing sleeve 6, can be completely sealed, and no leakage will occur during long-term operation.

[0029] Furthermore, one end of the sealing sleeve 6 is connected to the housing 1, and the sealing sleeve 6 and the housing 1 are detachable, such as... Figure 1 and Figure 2 As shown, because the sealing sleeve 6 has an annular edge 7 on the side close to the housing 1, the annular edge 7 is detachably connected to the housing 1, and the two are fastened by bolts. The inner edge of the annular edge 7 has a sealing groove 27, and the sealing groove 27 has an annular sealing ring 26, which completely seals the sealing sleeve 6 and the housing 1.

[0030] The other end of the sealing sleeve 6 is provided with an annular cover 5, which is detachably connected to the sealing sleeve 6. The two are specifically fastened by bolts, such as... Figure 4 As shown, an annular stop 25 is coaxially provided at one end of the sealing sleeve 6 near the housing 1, and the annular stop 25 is coaxially placed on the input shaft 4 and the output shaft 9;

[0031] The sealing sleeve 6 is equipped with an annular sealing seat 14 that fits between the input shaft 4 and the output shaft 9, such as... Figure 4 As shown, to ensure the stability of the annular seal seat 14, a blocking step 28 is provided inside the sealing sleeve 6, and the annular seal seat 14 is positioned at the blocking step 28. A limiting flange 29 is provided on the side of the annular cover 5 near the annular seal seat 14. When the annular cover 5 is installed on the end of the sealing sleeve 6, the limiting flange 29 is positioned inside the sealing sleeve 6, and the limiting flange 29 and the blocking step 28 form a cavity to accommodate the annular seal seat 14, meaning the annular seal seat 14 can be stably positioned within the cavity. The inner and outer sides of the annular seal seat 14 are in elastic contact with the input shaft 4, the output shaft 9, and the sealing sleeve 6, respectively. Therefore, the contact points between the annular seal seat 14 and the input shaft 4, the output shaft 9, and the sealing sleeve 6 are sealed. Simultaneously, the outer edge of the annular seal seat 14 is clamped by the limiting flange 29 and the blocking step 28, further improving the sealing performance of the outer edge of the annular seal seat 14.

[0032] This application also provides conical sealing rings 20 on both sides of the inner ring edge of the annular sealing seat 14. The conical sealing rings 20 are coaxially sleeved on the input shaft 4 and the output shaft 9. In order to further improve the sealing effect, multiple sealing rings 21 are provided on the conical sealing rings 20 and the inner wall of the annular sealing seat 14. The sealing rings 21 elastically contact the input shaft 4 and the output shaft 9.

[0033] Next, a conical sleeve 22 is fitted onto each conical sealing ring 20. In the initial state, the conical sleeve 22 is located at the end of the conical sealing ring 20 away from the annular sealing seat 14, that is, there is a certain gap between the conical sleeve 22 and the annular sealing seat 14, so that the conical sleeve 22 has space to move towards the annular sealing seat 14.

[0034] Elastic structures are provided between the conical sleeve 22 and the annular stop 25, and between the conical sleeve 22 and the annular cover 5. The elastic structures include compression springs 23 located between the conical sleeve 22 and the annular stop 25, and between the conical sleeve 22 and the annular cover 5. The compression springs 23 are respectively sleeved on the input shaft 4 and the output shaft 9.

[0035] Each conical sleeve 22 is provided with a retaining ring 24 on its exterior. The two ends of the compression spring 23 are in elastic contact with the retaining ring 24, the annular cover 5, and the annular stop 25, respectively. On the opposite sides of the retaining ring 24 and the annular cover 5, and on the opposite sides of the retaining ring 24 and the annular stop 25, there are coaxial annular spring seats 19. The two ends of the compression spring 23 are respectively sleeved on the annular spring seats 19 or placed inside the annular spring seats 19. This ensures that the two ends of the annular spring seats 19 remain stable and prevents any unnecessary slippage.

[0036] Therefore, under the push of the elastic structure, namely the compression spring 23, the tapered sleeve 22 tends to move towards the annular sealing seat 14, causing the tapered sealing ring 20 to contract towards the input shaft 4 and the output shaft 9. This allows the tapered sealing ring 20 to tightly grip the input shaft 4 and the output shaft 9, completely sealing them. Even after prolonged operation, the tapered sealing ring 20 will wear, but under the continuous pressure of the tapered sleeve 22, it will still tightly grip the input shaft 4 and the output shaft 9, preventing lubricant leakage during long-term use.

[0037] Based on the above embodiments, further optimization can be made, such that the inner edge of the conical sleeve 22 near the annular sealing seat is flared to avoid the conical sleeve 22 rubbing against the surface of the conical sealing ring 20.

[0038] Based on the above embodiments, further optimization can be achieved by providing a sealing ring inside the inner edge of the annular cover 5. This sealing ring can prevent external debris from entering the sealing sleeve 6, thus playing a dust removal role.

[0039] Based on the above embodiments, it should be further explained that the input shaft 4 and the output shaft 9 were originally equipped with oil seals at the ends near the sealing sleeve 6. The oil seals were installed in the mounting holes so that the oil seals and the annular sealing seat 14 could work together to seal.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof speed reducer, comprising a housing (1), characterized in that, The housing (1) is rotatably provided with an input shaft (4) and an output shaft (9) that are perpendicular to each other, and the input shaft (4) and the output shaft (9) are connected by a gear transmission device. Both the input shaft (4) and the output shaft (9) are coaxially fitted with sealing sleeves (6). One end of the sealing sleeve (6) is connected to the housing (1), and the other end is provided with an annular cover (5). The end of the sealing sleeve (6) near the housing (1) is coaxially provided with an annular stop (25). The sealing sleeve (6) is provided with an annular sealing seat (14) that is fitted on the input shaft (4) and the output shaft (9). The inner ring edge of the annular sealing seat (14) is provided with conical sealing rings (20) on both sides, and each conical sealing ring (20) is fitted with a conical sleeve (22). Elastic structures are provided between the conical sleeve (22) and the annular stop (25) and between the conical sleeve (22) and the annular cover (5), so that the conical sleeve (22) is pushed by the elastic structure, causing the conical sealing ring (20) to contract towards the input shaft (4) and the output shaft (9).

2. The oil-leakage-proof reducer as described in claim 1, characterized in that, Multiple sealing rings (21) are provided on the inner walls of the conical sealing ring (20) and the annular sealing seat (14).

3. The oil-leakage-proof reducer as described in claim 1, characterized in that, The sealing sleeve (6) is provided with a blocking step (28), the annular sealing seat (14) is placed at the blocking step (28), and a limiting flange (29) is provided on the side of the annular cover (5) near the annular sealing seat (14). The annular cover (5) and the sealing sleeve (6) are detachably connected. When the annular cover (5) is installed on the end of the sealing sleeve (6), the limiting flange (29) is placed inside the sealing sleeve (6), and the limiting flange (29) and the blocking step (28) form a cavity for accommodating the annular sealing seat (14).

4. The oil-leakage-proof reducer as described in claim 1, characterized in that, The sealing sleeve (6) has an annular edge (7) on the side near the housing (1). The annular edge (7) is detachably connected to the housing (1). The inner edge of the annular edge (7) has a sealing groove (27), and the sealing groove (27) has an annular sealing ring (26).

5. The leak-proof reducer as described in any one of claims 1-4, characterized in that, The elastic structure includes compression springs (23) located between the conical sleeve (22) and the annular stop (25) and between the conical sleeve (22) and the annular cover (5), with the compression springs (23) respectively sleeved on the input shaft (4) and the output shaft (9); Each conical sleeve (22) is provided with a retaining ring (24) on the outside, and the two ends of the compression spring (23) are in elastic contact with the retaining ring (24), the annular cover (5) and the annular stop (25) respectively.

6. The oil-leakage-proof reducer as described in claim 5, characterized in that, An annular spring seat (19) is coaxially provided on the opposite side of the retaining ring (24) and the annular cover (5) and on the opposite side of the retaining ring (24) and the annular stop seat (25). The two ends of the compression spring (23) are respectively sleeved on the annular spring seat (19) or placed inside the annular spring seat (19).

7. The oil-leakage-proof reducer as described in claim 6, characterized in that, The gear transmission device includes a first bevel gear (17) mounted on the end of the input shaft (4), one side of the first bevel gear (17) being perpendicularly connected to a second bevel gear (11), and the second bevel gear (11) being mounted on a first mounting shaft (16); A first transmission gear (15) is also installed on the first mounting shaft (16). One side of the first transmission gear (15) meshes with the second transmission gear (10). The second transmission gear (10) is installed on the second mounting shaft (18). The second mounting shaft (18) is also provided with a third transmission gear (12), one side of which meshes with a fourth transmission gear (13), which is mounted on the output shaft (9); and, The first mounting shaft (16), the second mounting shaft (18), and the output shaft (9) are parallel, and mounting holes corresponding to the input shaft (4), the first mounting shaft (16), the second mounting shaft (18), and the output shaft (9) are respectively provided on the housing (1). The input shaft (4), the first mounting shaft (16), the second mounting shaft (18), and the output shaft (9) are all rotatably mounted in the mounting holes. Both ends of the first mounting shaft (16) and the second mounting shaft (18) as well as the end of the output shaft (9) away from the sealing sleeve (6) are provided with sealing end caps (2), and the edge of the sealing end caps (2) is detachably connected to the housing (1).

8. The oil-leakage-proof reducer as described in claim 1, characterized in that, The top of the housing (1) is detachably fitted with a housing cover (8).

9. The oil-leakage-proof reducer as described in claim 1, characterized in that, The bottom edge of the shell (1) is provided with multiple supports (3).

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