Speed reducer used in water environment

Abstract

The utility model provides a speed reducer used in a water environment, belongs to the technical field of speed reducers, and solves the technical problems that the connecting end of an existing underwater special speed reducer and a motor is not provided with a sealing waterproof structure, so that the connecting end of the existing underwater special speed reducer and the motor has the risk of water inflow and the like. The speed reducer used in the water environment comprises a motor shell, a first connecting flange is integrally formed at the front end of the motor shell, a connecting convex ring is integrally formed at the front end of the first connecting flange, a mounting flange is fixed to the front end of the first connecting flange through bolts, the rear end of the mounting flange is wrapped with a sealing layer, and the outer surface of the sealing layer makes contact with the inner wall of the connecting convex ring. An embedded flange is fixed to the front end of the mounting flange through bolts, a connecting groove is formed in the front end of the mounting flange, an embedded protruding block is integrally formed at the rear end of the embedded flange, and the outer surface of the embedded protruding block is matched with the inner wall of the connecting groove. The waterproof structure has the advantages of improving the sealing performance of the joint, optimizing the waterproof performance and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of speed reducers, and relates to an underwater speed reducer, in particular to a speed reducer for use in a water environment. Background Technique

[0002] A speed reducer is a mechanical device that plays a role in matching speeds and transmitting torques between a prime mover and a working machine or an actuator. It is widely used in modern machinery and is basically applied in various industrial fields. However, in many cases, a speed reducer needs to be applied underwater. The speed reducer is a core component in diving equipment, located between the motor and the impeller, used to reduce the speed and increase the torque to meet the requirements of underwater operations.

[0003] After retrieval, for example, a Chinese patent document discloses a special underwater speed reducer with an anti-corrosion function [Application No.: 202011374934.3; Publication No.: CN112377607B]. By sealing both ends of the worm, its sealing effect is improved to prevent external water sources on the surface from entering the equipment. It mainly realizes the sealing treatment of the worm end through the snap connection of the sealing gasket and the ball bearing, and the extrusion of the sealing gasket by the sealing end cover to avoid the entry of water sources.

[0004] Although the special underwater speed reducer with an anti-corrosion function disclosed in this patent avoids the entry of water sources, there is no sealing and waterproof structure at the connection end with the motor, resulting in a risk of water ingress at the connection end with the motor. Summary of the Utility Model

[0005] The purpose of the present utility model is to address the above problems existing in the prior art and propose a speed reducer for use in a water environment. The technical problem to be solved by this utility model is: how to improve the sealing performance at the connection points of the speed reducer with the equipment at both ends.

[0006] The purpose of the present utility model can be achieved by the following technical solutions:

[0007] A speed reducer for use in a water environment, comprising a motor housing. A first connection flange is integrally formed at the front end of the motor housing. A connection convex ring is integrally formed at the front end of the first connection flange. An installation flange is fixed to the front end of the first connection flange by bolts. A sealing layer is wrapped around the rear end of the installation flange. The outer surface of the sealing layer contacts the inner wall of the connection convex ring. An embedding flange is fixed to the front end of the installation flange by bolts. A connection groove is formed at the front end of the installation flange. An embedding convex block is integrally formed at the rear end of the embedding flange. The outer surface of the embedding convex block is adapted to the inner wall of the connection groove. A flange-bearing housing is fixed to the front end of the embedding flange by bolts. A second sealing layer is wrapped between the embedding flange and the flange-bearing housing. A second connection flange is embedded at the front end of the flange-bearing housing. A third sealing layer is wrapped between the flange-bearing housing and the second connection flange. A gear set is arranged inside the flange-bearing housing. An electric motor output end and an output shaft are arranged on the gear set.

[0008] The working principle of the present utility model is as follows: The electric motor drives the electric motor output end to rotate. The electric motor output end drives the gear connected thereto in the gear set to rotate. The gears in the gear set are transmitted to the output shaft to achieve speed reduction. During installation, the installation flange and the connection flange are tightly connected through the sealing layer and the connection convex ring to achieve a sealing effect. The embedding flange and the installation flange are embedded with each other through the connection groove and the embedding convex block, increasing the contact area on the basis of flange connection. At the same time, sealing layers are provided on their contact surfaces to improve the sealing performance. The second connection flange is used to connect the input shaft of an external speed reduction device.

[0009] A third bearing is placed between the electric motor output end and the embedding flange. A third snap ring contacts the front end of the third bearing. A ring groove adapted to the third snap ring is formed in the embedding flange.

[0010] With the above structure, the third snap ring has elasticity. Press the protruding part of the third snap ring with two fingers, and then merge the two fingers to deform the third snap ring for disassembly and assembly. The third bearing plays a role in supporting the electric motor output end inside the embedding flange.

[0011] A second oil seal is fixed between the installation flange and the electric motor output end.

[0012] With the above structure, by providing a second oil seal between the installation flange and the electric motor output end, secondary sealing treatment is realized for the connection between the electric motor and the gear set.

[0013] A second bearing and a first bearing are placed between the output shaft and the flange-bearing housing. A second snap ring contacts the front end of the second bearing. A first snap ring contacts the rear end of the first bearing. Ring grooves adapted to the second snap ring and the first snap ring are formed inside the flange-bearing housing.

[0014] With the above structure, the first snap ring clamps the first bearing at the rear end of the first oil seal, enabling the first bearing to play a role in supporting the output shaft at the front in the flange housing. The second snap ring clamps the second bearing at the front end of the gear set, enabling the second bearing to play a role in supporting the output shaft at the rear in the flange housing.

[0015] A first oil seal is fixed to the front end of the inner wall of the flange housing, and the first oil seal is fixed to the output shaft.

[0016] With the above structure, the first oil seal is arranged between the flange housing and the output shaft to play a role in waterproofing at the connection with the input shaft of the reduction device.

[0017] The gear set includes a second worm that is press-fitted on the upper end of the output end of the motor. A second worm gear is meshed with the second worm. A first worm is press-fitted on the second worm gear. A first worm gear is meshed with the first worm. The inner wall of the first worm gear is key-connected to the output shaft.

[0018] With the above structure, the motor drives the rotation of its output end. The output end drives the second worm to rotate. The second worm is transmitted to the second worm gear. The first worm rotates with the second worm gear. The first worm gear rotates with the first worm. The output shaft rotates with the first worm gear to achieve speed reduction transmission.

[0019] Compared with the prior art, the reducer for use in a water environment has the following advantages:

[0020] 1. Through the mutual fitting between the mounting flange, the first connecting flange, the fitting flange and the flange housing, and the setting of the sealing layer on the contact surface, the sealing performance of each connecting part is improved, and its waterproof function in a water environment is optimized.

[0021] 2. Through the setting of the first snap ring, the second snap ring and the third snap ring, the first bearing, the second bearing and the third bearing are respectively limited. Without the need for fixed installation of the bearings, the bearings can play a role in supporting between the rotating shaft and the housing, which is convenient for disassembly and replacement of parts in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the present utility model.

[0023] Figure 2 is a schematic cross-sectional structural diagram of the motor housing part of the present utility model.

[0024] Figure 3 is a schematic structural diagram of the gear set part of the present utility model.

[0025] Figure 4 is a schematic structural diagram of the first snap ring part of the present utility model.

[0026] Figure 5 is an exploded view of the structure of the present utility model.

[0027] Figure 6 Yes Figure 2 The enlarged view of the structure at position A in

[0028] In the figure, 1 is the motor housing; 2 is the motor; 3 is the mounting flange; 301 is the sealing layer; 302 is the connecting groove; 4 is the first connecting flange; 401 is the connecting convex ring; 5 is the fitting flange; 501 is the fitting convex block; 6 is the flange housing; 7 is the second connecting flange; 8 is the first oil seal; 9 is the first bearing; 10 is the first snap ring; 11 is the second snap ring; 12 is the second bearing; 13 is the output shaft; 14 is the gear set; 1401 is the first worm gear; 1402 is the first worm; 1403 is the second worm gear; 1404 is the second worm; 15 is the third snap ring; 16 is the third bearing; 17 is the second oil seal. Specific embodiments

[0029] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0030] Such as Figures 1-5As shown in the figure, the reducer for use in an aqueous environment includes a motor housing 1. At the front end of the motor housing 1, a first connecting flange 4 is integrally formed. At the front end of the first connecting flange 4, a connecting convex ring 401 is integrally formed. At the front end of the first connecting flange 4, an installation flange 3 is fixed by bolts. At the rear end of the installation flange 3, a sealing layer 301 is wrapped. The outer surface of the sealing layer 301 contacts the inner wall of the connecting convex ring 401. At the front end of the installation flange 3, a fitting flange 5 is fixed by bolts. At the front end of the installation flange 3, a connecting groove 302 is formed. At the rear end of the fitting flange 5, a fitting convex block 501 is integrally formed. The outer surface of the fitting convex block 501 is adapted to the inner wall of the connecting groove 302. At the front end of the fitting flange 5, a flange housing 6 is fixed by bolts. A second sealing layer is wrapped between the fitting flange 5 and the flange housing 6. At the front end of the flange housing 6, a second connecting flange 7 is fitted. A third sealing layer is wrapped between the flange housing 6 and the second connecting flange 7. A gear set 14 is arranged inside the flange housing 6. At both ends of the gear set 14, the output end of the motor 2 and the output shaft 13 are detachably connected respectively. In this embodiment, a driving part of the motor 2 is arranged inside the motor housing 1, and its specific structure and working principle are prior art. The gear set 14 is composed of multiple meshing gears, which is also prior art. Among them, two gears are respectively penetrated by the output end of the motor 2 and the output shaft 13 to achieve transmission connection. The motor 2 drives the rotation of its output end. The output end of the motor 2 drives the gear connected to it in the gear set 14 to rotate. The gears in the gear set are transmitted to the output shaft 13 to achieve speed reduction. During installation, the installation flange 3 and the connecting flange 4 are tightly connected through the sealing layer 301 and the connecting convex ring 401 to achieve a sealing effect. Between the fitting flange 5 and the installation flange 3, the connecting groove 302 and the fitting convex block 501 are engaged to increase the contact area on the basis of flange connection. The flange between the fitting flange 5 and the flange housing 6 is connected by threads, and at the same time, sealing layers 301 are arranged on their contact surfaces to improve the sealing performance. The second connecting flange 7 is used to connect the input shaft of an external speed reduction device.

[0031] A third bearing 16 is placed between the output end of the motor 2 and the fitting flange 5. At the front end of the third bearing 16, a third snap ring 15 is contacted. A ring groove adapted to the third snap ring 15 is formed inside the fitting flange 5. In this embodiment, the third snap ring 15 has elasticity. Press the protruding part of the third snap ring 15 with two fingers, and then combine the two fingers to deform the third snap ring 15 for disassembly and assembly. The third bearing 16 plays a role in supporting the output end of the motor 2 inside the fitting flange 5.

[0032] A second oil seal 17 is fixed between the installation flange 3 and the output end of the motor 2. In this embodiment, by arranging the second oil seal 17 between the installation flange 3 and the output end of the motor 2, secondary sealing treatment is realized for the connection between the motor and the gear set 14.

[0033] A second bearing 12 and a first bearing 9 are placed between the output shaft 13 and the flanged housing 6. A second snap ring 11 is in contact with the front end of the second bearing 12, and a first snap ring 10 is in contact with the rear end of the first bearing 9. Ring grooves adapted to the second snap ring 11 and the first snap ring 10 are formed in the flanged housing 6. In this embodiment, the first snap ring 10 and the second snap ring 11 are used in the same way as the third snap ring 15. The first snap ring 10 clamps the first bearing 9 at the rear end of the first oil seal 8, enabling the first bearing 9 to play a role in front-supported the output shaft 13 within the flanged housing 6. The second snap ring 11 clamps the second bearing 12 at the front end of the gear set 14, enabling the second bearing 9 to play a role in rear-supported the output shaft 13 within the flanged housing 6.

[0034] A first oil seal 8 is fixed to the front end inner wall of the flanged housing 6, and the first oil seal 8 is fixed to the output shaft 13. In this embodiment, the first oil seal 8 is provided between the flanged housing 6 and the output shaft 13 to play a role in waterproofing at the connection with the input shaft of the reduction device.

[0035] The gear set 14 includes a second worm 1404 that is press-fitted onto the upper end of the output end of the motor 2. A second worm gear 1403 is meshed with the second worm 1404. A first worm 1402 is press-fitted onto the second worm gear 1403. A first worm gear 1401 is meshed with the first worm 1402. The inner wall of the first worm gear 1401 is key-connected to the output shaft 13. In this embodiment, the motor 2 drives the rotation of its output end, the output end drives the second worm 1404 to rotate, the second worm 1404 transmits power to the second worm gear 1403, the first worm 1402 rotates with the second worm gear 1403, the first worm gear 1404 rotates with the first worm 1402, and the output shaft rotates with the first worm gear 1401 to achieve speed reduction transmission.

[0036] Working principle of the utility model: The motor drives the output end of the motor 2 to rotate. The output end of the motor 2 drives the gear connected to it in the gear set 14 to rotate. The gears in the gear set are transmitted to the output shaft 13 to achieve speed reduction. During installation, the third snap ring 15 is elastic. Press the protruding part of the third snap ring 15 with two fingers, and then combine the two fingers to deform the third snap ring 15 for disassembly and assembly. The third bearing 16 plays a role in supporting the output end of the motor 2 in the fitting flange 5. By setting the second oil seal 17 between the mounting flange 3 and the output end of the motor 2, secondary sealing treatment is achieved for the connection between the motor and the gear set 14. The mounting flange 3 and the connecting flange 4 are tightly connected through the sealing layer 301 and the connecting convex ring 401 to achieve a sealing effect. The fitting flange 5 and the mounting flange 3 are fitted with each other through the connecting groove 302 and the fitting convex block 501 to increase the contact area on the basis of flange connection. The fitting flange 5 and the flange of the flange housing 6 are connected by threads, and at the same time, sealing layers 301 are provided on their contact surfaces to improve the sealing performance. The first snap ring 10 clamps the first bearing 9 at the rear end of the first oil seal 8, so that the first bearing 9 plays a role in supporting the output shaft 13 at the front in the flange housing 6. The second snap ring 11 clamps the second bearing 12 at the front end of the gear set 14, so that the second bearing 9 plays a role in supporting the output shaft 13 at the rear in the flange housing 6. The first oil seal 8 is provided between the flange housing 6 and the output shaft 13 to play a role in waterproofing at the connection with the input shaft of the speed reduction device. The second connecting flange 7 is used to connect the input shaft of the external speed reduction device.

[0037] In summary, through the mutual fitting between the mounting flange, the first connecting flange, the fitting flange and the flange housing, and the setting of the sealing layer on the contact surface, the sealing performance of each connecting part is improved, and its waterproof function in a water environment is optimized.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the utility model or exceed the scope defined by the appended claims.

Claims

1. A reducer for use in a water environment, comprising a motor housing (1), characterized in that: The motor housing (1) is provided with a motor (2), the front end of the motor housing (1) is integrally formed with a first connecting flange (4), the front end of the first connecting flange (4) is integrally formed with a connecting convex ring (401), the front end of the first connecting flange (4) is fixed with a mounting flange (3) by bolts, the rear end of the mounting flange (3) is wrapped with a sealing layer (301), the outer surface of the sealing layer (301) is in contact with the inner wall of the connecting convex ring (401), the front end of the mounting flange (3) is fixed with an embedding flange (5) by bolts, the front end of the mounting flange (3) is provided with a connecting groove (302), and the rear end of the embedding flange (5) is provided with a connecting groove (302). An engaging protrusion (501) is integrally formed at the end, the outer surface of the engaging protrusion (501) is adapted to the inner wall of the connecting groove (302), the front end of the engaging flange (5) is fixed with a flanged housing (6) by bolts, a second sealing layer is wrapped between the engaging flange (5) and the flanged housing (6), a second connecting flange (7) is engaged at the front end of the flanged housing (6), a third sealing layer is wrapped between the flanged housing (6) and the second connecting flange (7), a gear set (14) is arranged in the flanged housing (6), and the gear set (14) is provided with an output end of the motor (2) and an output shaft (13).

2. A reducer for use in a water environment according to claim 1, characterized in that: A third bearing (16) is placed between the output end of the motor (2) and the embedded flange (5); the front end of the third bearing (16) contacts a third snap ring (15); and a ring groove adapted to the third snap ring (15) is provided in the embedded flange (5).

3. A reducer for use in a water environment according to claim 2, characterized in that: A second oil seal (17) is fixed between the mounting flange (3) and the output end of the motor (2).

4. The reducer for use in a water environment according to claim 1, characterized in that: A second bearing (12) and a first bearing (9) are placed between the output shaft (13) and the flanged housing (6); the front end of the second bearing (12) contacts a second retaining ring (11), and the rear end of the first bearing (9) contacts a first retaining ring (10); and a ring groove adapted to the second retaining ring (11) and the first retaining ring (10) is provided in the flanged housing (6).

5. The reducer for use in a water environment according to claim 4, characterized in that: A first oil seal (8) is fixed to the front end of the inner wall of the flanged housing (6), and the first oil seal (8) is fixed to the output shaft (13).

6. The reducer for use in a water environment according to claim 1, characterized in that: The gear set (14) comprises a second worm (1404) which is interference-fitted on the upper end of the output end of the motor (2); a second worm wheel (1403) is meshed on the second worm (1404); a first worm (1402) is interference-fitted on the second worm wheel (1403); a first worm wheel (1401) is meshed on the first worm (1402); and an inner wall of the first worm wheel (1401) is key-connected to the output shaft (13).

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