CN220016015U - Oil seepage prevention structure for shaft end of suspension type speed reducer - Google Patents

Abstract

The utility model relates to an oil seepage prevention structure of a shaft end of a suspension type speed reducer, which comprises a speed reducer body, wherein an oil baffle cover is arranged on the speed reducer body, a motor outlet shaft penetrates through a shaft hole in the oil baffle cover to extend into the speed reducer body, an oil baffle cavity communicated with the shaft hole is arranged on the oil baffle cover, an oil baffle assembly sleeved on the motor outlet shaft is arranged in the oil baffle cavity, the oil baffle assembly comprises a mounting shaft sleeve integrally arranged with the motor outlet shaft, a labyrinth disc extending along the radial direction is arranged at the end part of the mounting shaft sleeve, far away from the speed reducer body, of the labyrinth disc, a plurality of annular platforms in clearance fit with an annular groove on the inner side wall of the oil baffle cavity are arranged on one end surface, far away from the speed reducer body, of the labyrinth disc, a mounting annular oil baffle disc is arranged along the circumference on the outer wall of the mounting shaft sleeve, a plurality of radial oil guide grooves extending along the radial direction of the annular oil baffle disc are arranged on the end surface, close to the speed reducer body, and an oil return hole is arranged on the end cover of the speed reducer body.

Description

Oil seepage prevention structure for shaft end of suspension type speed reducer

Technical Field

The utility model relates to the technical field of speed reducers, in particular to an oil seepage prevention structure at the shaft end of a suspension type speed reducer.

Background

In the speed reducer structure that motor and gear box cooperation formed, the output shaft of motor can stretch into the gear box and realize the transmission effect of moment, and can store lubricating grease in the gear box inside for lubricated gear in the gear box, when the motor drives the output shaft and rotates, lubricating grease in the gear box can remove along with the output shaft, and then infiltrate inside the motor to influence the life of motor, lead to the damage of motor. In the prior art, the motor is usually prevented from being internally filled with lubricating grease in a rubber sealing mode at a rotating fit position formed by the motor output shaft and the motor shell. However, the output shaft of the motor is in a continuous rotation state in the running process, so that the rubber seal is continuously worn, the rubber seal also has the problem of aging after long-time use, and the sealing effect of the rubber seal is reduced.

Disclosed in chinese patent document with publication number of CN209088723U is an oil-proof structure of gear-hobbing output shaft of motor, which is characterized in that an oil-proof sleeve is tightly arranged on the output shaft of motor, one end of the oil-proof sleeve far away from the end cover extends to the outside in axial direction to form an annular retainer ring, and lubricating oil moves outwards along with the inner wall of the oil-proof sleeve, so that the lubricating oil can move to the annular retainer ring, and then the lubricating oil can be thrown to the circumferential side, so that the lubricating oil is far away from the output shaft of motor, and the lubricating oil is prevented from entering the motor. However, by adopting the mode, the oil-proof shaft sleeve and the motor output shaft are required to be tightly matched, the requirement on the dimensional accuracy between the oil-proof shaft sleeve and the motor output shaft is higher, if the inner hole diameter of the oil-proof shaft sleeve is too large, a larger gap is formed between the oil-proof shaft sleeve and the motor output shaft, and lubricating grease can still move into the motor along the gap between the oil-proof shaft sleeve and the motor output shaft, so that the situation of poor oil seepage prevention effect is caused; if the inner hole diameter of the oil-proof shaft sleeve is too small, the problem that the oil-proof shaft sleeve and the motor output shaft cannot be assembled is caused.

Disclosure of Invention

In order to solve the technical problems, the utility model provides an oil seepage prevention structure for the shaft end of a suspension type speed reducer, which aims to solve the technical problems of high assembly precision requirement of an oil-proof shaft sleeve and a motor output shaft and poor oil seepage prevention effect in the prior art.

The utility model provides an oil seepage prevention structure at the shaft end of a suspension type speed reducer, which comprises a speed reducer body, wherein an oil baffle cover is arranged on the speed reducer body, a motor outlet shaft penetrates through a shaft hole in the oil baffle cover to extend into the speed reducer body, an oil baffle cavity communicated with the shaft hole is arranged on the oil baffle cover, an oil baffle component sleeved on the motor outlet shaft is arranged in the oil baffle cavity, the oil baffle component comprises a mounting shaft sleeve integrally arranged with the motor outlet shaft, one end, close to the speed reducer body, of the mounting shaft sleeve is provided with an oil guide end face extending radially, the end, far away from the speed reducer body, of the mounting shaft sleeve is provided with a labyrinth disc extending radially, one end, far away from the speed reducer body, of the labyrinth disc is provided with a plurality of annular tables in clearance fit with annular grooves in the inner side walls of the oil baffle cavity, the outer wall of the mounting shaft sleeve is provided with a mounting annular groove in a clamping manner, the annular oil baffle disc is arranged on the end face, close to the speed reducer body, the annular oil baffle disc is provided with a plurality of oil guide discs extending radially, and an oil return hole is arranged on the speed reducer body.

Further, the outer diameter of the annular windage tray is 3 times that of the mounting sleeve.

Further, the axial thickness of the mounting shaft sleeve is 4mm, and the axial thickness of the annular oil baffle disc is 2mm.

Further, a sealing groove is arranged on the side wall of the installation ring groove in a ring mode, and a sealing ring which is tightly matched with the sealing groove is arranged on the inner diameter hole wall of the annular oil baffle disc.

Further, the annular oil baffle disc comprises first arc baffle and second arc baffle, the both ends of first arc baffle are equipped with the first connecting portion of circumference extension, the both ends of second arc baffle are equipped with the second connecting portion of circumference extension, pass through the screw fixation between first connecting portion and the second connecting portion, be equipped with sand grip and the recess of mutually supporting on the opposite face of first connecting portion and second connecting portion.

Further, the axial thickness of the first connecting portion is the same as the axial thickness of the second connecting portion, and the sum of the axial thicknesses of the first connecting portion and the second connecting portion is identical to the axial thickness of the annular oil baffle disc.

Further, a plurality of axial oil guide grooves are formed in the circumferential inner side wall of the oil retaining cavity.

Further, the section of the radial oil guide groove is V-shaped.

Further, the radial oil guide groove extends in an arc shape from the inner diameter to the outer diameter direction of the annular oil baffle disc, and the arc extending direction is consistent with the rotating direction of the annular oil baffle disc.

The utility model has the beneficial effects that no gap is formed between the mounting shaft sleeve and the motor output shaft by integrally arranging the mounting shaft sleeve and the motor output shaft, so that the condition that lubricating grease moves into the motor from the gap between the mounting shaft sleeve and the motor output shaft in the prior art can be avoided; the one end that the installation axle sleeve is close to the reducing gear box is equipped with radial oil guide terminal surface that extends, the lateral wall of installation axle sleeve sets up the installation annular along the circumference, the annular oil baffle of joint is equipped with a plurality of radial oil guide grooves along the radial extension of annular oil baffle on the terminal surface that the annular oil baffle is close to the reducing gear box, at this moment, as long as the internal diameter of annular oil baffle is greater than the internal diameter of installation annular and is less than the external diameter of installation annular, annular oil baffle homoenergetic is in the installation annular, and because the oil guide terminal surface that sets up on the installation axle sleeve, when the motor goes out the axle and rotates at a high speed, lubricating grease moves to the oil guide terminal surface of installation axle sleeve along the motor, lubricating grease can move to annular oil baffle along the oil guide terminal surface on, under centrifugal force, annular oil baffle is gone out along radial oil guide groove when rotating, make it keep away from the motor play axle and fall on the inner wall to the oil baffle cavity, and then lubricating grease is thrown back to the inside of reducing gear box through the oil gallery under the effect of gravity. The end part of the mounting shaft sleeve, which is far away from the reduction box body, is provided with a labyrinth disc extending along the radial direction, and one end surface of the labyrinth disc, which is far away from the reduction box body, is provided with a plurality of annular tables in clearance fit with annular grooves on the inner side wall of the oil baffle cavity; similarly, dust outside the oil baffle cover can be blocked, the dust is prevented from entering the reduction gearbox body, and the running environment in the reduction gearbox body is ensured. In summary, the utility model can reduce the assembly precision between the oil baffle assembly and the motor output shaft, and can avoid the situation of poor oil seepage prevention effect caused by assembly problem, and the arrangement of the annular oil baffle disc and the labyrinth disc can play a double stop role on lubricating grease, thereby improving the oil seepage prevention effect.

The utility model will be further described with reference to the drawings and the specific examples.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic view of an oil baffle assembly according to the present utility model;

fig. 3 is a schematic view of the structure of the annular windage tray of the present utility model.

In the accompanying drawings: 100-reduction box body, 101-end cover, 102-oil return hole, 200-oil baffle cover, 201-shaft hole, 202-oil baffle cavity, 203-axial oil guide groove, 204-annular groove, 300-oil baffle component, 301-mounting shaft sleeve, 3011-oil guide end face, 3012-mounting annular groove, 3013-seal groove, 302-annular oil baffle disc, 3021-radial oil guide groove, 3022-first arc baffle plate, 3023-first connecting part, 3024-convex strip, 3025-second arc baffle plate, 3026-second connecting part, 3027-groove, 303-sealing ring, 400-labyrinth disc, 401-annular table and 500-motor output shaft.

Detailed Description

Specific embodiments of the present utility model will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, the present utility model provides an embodiment of an oil seepage prevention structure at the shaft end of a suspension type speed reducer, and the oil seepage prevention structure at the shaft end of the suspension type speed reducer includes a speed reducer housing 100, an oil blocking cover 200 is disposed on the speed reducer housing 100, and the oil blocking cover 200 is disposed to avoid the phenomenon of dripping of lubricating grease due to the installation specificity of the suspension type speed reducer. The motor output shaft 500 extends into the reduction gearbox 100 through a shaft hole 201 on the oil baffle cover 200, the oil baffle cover 200 is provided with an oil baffle cavity 202 communicated with the shaft hole 201, preferably, a plurality of axial oil guide grooves 203 are axially formed in the circumferential inner side wall of the oil baffle cavity 202, and at this time, lubricating grease thrown on the oil baffle cover 200 through the annular oil baffle disc 302 flows downwards through the flow guide of the oil guide grooves, so as to play a role in flow guide. The oil blocking cavity 202 is internally provided with the oil blocking assembly 300 sleeved on the motor output shaft 500, and the lubricating grease in the reduction gearbox 100 can be blocked by the arrangement of the oil blocking assembly 300, so that the lubricating grease is prevented from flowing into the motor along the axial direction of the motor output shaft 500.

Specifically, the oil baffle assembly 300 includes an installation shaft sleeve 301 integrally disposed with the motor output shaft 500, one end of the installation shaft sleeve 301, which is close to the reduction gearbox 100, is provided with a radially extending oil guiding end face 3011, an installation ring groove 3012 is circumferentially disposed on an outer wall of the installation shaft sleeve 301, an annular oil baffle disc 302 is clamped in the installation ring groove 3012, a plurality of radial oil guiding grooves 3021 extending radially along the annular oil baffle disc 302 are disposed on an end face, which is close to the reduction gearbox 100, of the annular oil baffle disc 302, and an oil return hole 102 is disposed on the end cover 101 of the reduction gearbox 100. Preferably, the cross section of the radial oil guiding groove 3021 is V-shaped, at this time, the V-shaped radial oil guiding groove 3021 guides the lubricating grease, and further, the V-shaped radial oil guiding groove 3021 extends in an arc shape from the inner diameter to the outer diameter of the annular windage tray 302, and the arc extending direction is consistent with the rotation direction of the annular windage tray 302. At this time, the flow speed of the lubricating grease on the annular windage tray 302 can be increased, and the lubricating grease can be rapidly thrown out of the annular windage tray 302. Preferably, the outer diameter of the annular windage tray 302 is 3 times the outer diameter of the mounting boss 301 to ensure the mounting stability of the annular windage tray 302. The axial thickness of the mounting shaft sleeve 301 is 4mm, and the axial thickness of the annular oil baffle disc 302 is 2mm, at this time, the mounting space can be saved on the premise of ensuring the mounting stability. At this time, as long as the inner diameter of the annular windage tray 302 is larger than the inner diameter of the mounting ring groove 3012 and smaller than the outer diameter of the mounting ring groove 3012, the annular windage tray 302 can be clamped in the mounting ring groove 3012, and as the oil guiding end face 3011 arranged on the mounting shaft sleeve 301, when the motor output shaft 500 rotates at high speed, the lubricating grease moves to the oil guiding end face 3011 of the mounting shaft sleeve 301 along the motor output shaft 500, the lubricating grease moves to the annular windage tray 302 along with the oil guiding end face 3011, under the action of centrifugal force, the annular windage tray 302 throws the grease out along the radial oil guiding groove 3021 when rotating, so that the lubricating grease is far away from the motor output shaft 500 and falls on the inner wall of the oil blocking cavity 202, and then flows back to the inside of the reduction box 100 through the oil return hole 102 under the action of gravity.

Further, a sealing groove 3013 is annularly arranged on the side wall of the mounting ring groove 3012, and a sealing ring 303 tightly matched with the sealing groove 3013 is arranged on the inner diameter hole wall of the annular oil baffle disc 302. Specifically, the seal ring 303 may be configured as a multi-group block structure, and a spring pressing sheet is disposed between the seal ring 303 and the seal groove 3013, so as to facilitate installation of the seal ring 303. When the annular windage tray 302 is engaged in the mounting groove 3012, the inner diameter of the seal ring 303 is tightly fitted to the seal groove 3013, and the outer diameter of the seal ring 303 is tightly fitted to the inner diameter of the annular windage tray 302.

The annular oil baffle disc 302 is composed of a first arc baffle 3022 and a second arc baffle 3025, a first connection portion 3023 extending in the circumferential direction is arranged at two ends of the first arc baffle 3022, a second connection portion 3026 extending in the circumferential direction is arranged at two ends of the second arc baffle 3025, the first connection portion 3023 and the second connection portion 3026 are fixed by screws, and a convex strip 3024 and a concave groove 3027 which are matched with each other are arranged on opposite surfaces of the first connection portion 3023 and the second connection portion 3026. In this way, the first arc baffle 3022 and the second arc baffle 3025 form the annular oil baffle disc 302 together, so that the annular oil baffle disc 302 can be conveniently installed, and the opposite surfaces of the first connection portion 3023 and the second connection portion 3026 are provided with the convex strips 3024 and the concave grooves 3027 which are matched with each other to form a labyrinth seal, so that lubricating grease can be prevented from crossing the annular oil baffle disc 302 along the gap between the first connection portion 3023 and the second connection portion 3026. Preferably, the axial thickness of the first connection portion 3023 is the same as the axial thickness of the second connection portion 3026, and the sum of the axial thicknesses of the first connection portion 3023 and the second connection portion 3026 is identical to the axial thickness of the annular windage tray 302. At this time, the structural stability of the annular windage tray 302 can be ensured, the gap between the first and second connection portions 3023 and 3026 can be reduced, and the oil impermeable effect of the annular windage tray 302 can be improved.

The end of the installation shaft sleeve 301, which is far away from the reduction box body 100, is provided with a labyrinth disc 400 extending along the radial direction, and one end surface of the labyrinth disc 400, which is far away from the reduction box body 100, is provided with a plurality of annular platforms 401 which are in clearance fit with the annular grooves 204 on the inner side wall of the oil baffle cavity 202. At this time, the labyrinth plate 400 is not affected to rotate along with the motor output shaft 500, lubricating grease can be blocked, and the lubricating grease which passes over the annular oil baffle disc 302 is prevented from moving towards the motor and entering the motor; similarly, dust outside the oil baffle cover 200 can be blocked, so that dust is prevented from entering the reduction gearbox body 100, and the running environment in the reduction gearbox body 100 is ensured.

By adopting the utility model, the assembly precision between the oil baffle assembly 300 and the motor output shaft 500 can be reduced, the condition of poor oil seepage prevention effect caused by assembly problem can be avoided, and the double stopping effect on lubricating grease is realized by the arrangement of the annular oil baffle disc 302 and the labyrinth disc 400, so that the oil seepage prevention effect is improved.

The foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides a shaft end oil seepage prevention structure of suspension type speed reducer, its characterized in that includes reduction box (100), be equipped with oil baffle lid (200) on reduction box (100), motor go out axle (500) and pass shaft hole (201) on oil baffle lid (200) extend to in reduction box (100), oil baffle lid (200) on have with communicating oil baffle cavity (202) of shaft hole (201), be equipped with in oil baffle cavity (202) and overlap oil baffle subassembly (300) of establishing on motor go out axle (500), oil baffle subassembly (300) include with installation axle sleeve (301) of motor go out axle (500) an organic whole setting, installation axle sleeve (301) are close to one end of reduction box (100) is equipped with radial extension's oil guide terminal surface (3011), the end that installation axle sleeve (301) kept away from reduction box (100) is equipped with along radial extension's labyrinth disc (400), be equipped with on the one end surface that labyrinth disc (400) kept away from reduction box (100) are equipped with a plurality of 202 and install annular groove (301) on the oil baffle cavity (100) and install annular groove (301) and install annular groove (3012) along the annular groove (301), the annular oil baffle disc (302) is provided with a plurality of radial oil guide grooves (3021) which extend radially along the annular oil baffle disc (302) on the end face, close to the reduction box body (100), of the annular oil baffle disc, and an oil return hole (102) is formed in an end cover (101) of the reduction box body (100).

2. The oil-impermeable structure for the shaft end of a suspension type speed reducer according to claim 1, characterized in that the axial thickness of the mounting sleeve (301) is 4mm, and the axial thickness of the annular windage tray (302) is 2mm.

3. The oil seepage prevention structure for the shaft end of the suspension type speed reducer according to claim 1, wherein a sealing groove (3013) is annularly arranged on the side wall of the installation ring groove (3012), and a sealing ring (303) tightly matched with the sealing groove (3013) is arranged on the inner diameter hole wall of the annular oil baffle disc (302).

4. The oil seepage prevention structure for the shaft end of the suspension type speed reducer according to claim 1, wherein the annular oil baffle disc (302) is composed of a first arc baffle plate (3022) and a second arc baffle plate (3025), first connecting portions (3023) extending circumferentially are arranged at two ends of the first arc baffle plate (3022), second connecting portions (3026) extending circumferentially are arranged at two ends of the second arc baffle plate (3025), the first connecting portions (3023) and the second connecting portions (3026) are fixed through screws, and protruding strips (3024) and grooves (3027) which are matched with each other are arranged on opposite faces of the first connecting portions (3023) and the second connecting portions (3026).

5. The oil-impermeable structure for the shaft end of a suspension type speed reducing device according to claim 4, characterized in that the axial thickness of the first connecting portion (3023) is the same as the axial thickness of the second connecting portion (3026), and the sum of the axial thicknesses of the first connecting portion (3023) and the second connecting portion (3026) is identical to the axial thickness of the annular windage tray (302).

6. The oil seepage prevention structure for the shaft end of the suspension type speed reducer according to claim 1, wherein a plurality of axial oil guide grooves (203) are formed in the circumferential inner side wall of the oil blocking cavity (202).

7. The oil-impermeable structure for the shaft end of a suspension type speed reducer according to claim 1, characterized in that the radial oil guiding groove (3021) has a V-shaped section.

8. The oil seepage prevention structure for the shaft end of the suspension type speed reducing device according to claim 7, wherein the radial oil guiding groove (3021) extends in an arc shape from the inner diameter direction to the outer diameter direction of the annular oil baffle disc (302), and the arc extending direction is consistent with the rotation direction of the annular oil baffle disc (302).