Leakage-proof speed reducer

Abstract

The utility model discloses a leakproof speed reducer, which relates to the technical field of speed reducers and comprises a planetary speed reducer shell, an input shaft is arranged in the planetary speed reducer shell, and a rolling bearing is arranged between the planetary speed reducer shell and the input shaft. A sealing device is arranged in the planetary reducer and comprises a framework oil seal arranged on the inner side of an end cover of the planetary reducer, a motor rotor flange is arranged below the end cover of the planetary reducer, and a flow guide hole is formed in the top face of the motor rotor flange and communicated with an oil collecting barrel. The framework oil seal prevents lubricating oil from leaking into the motor to influence the operation of the motor, and after the lip of the framework oil seal is abraded and leaks, the leaked oil is directly conveyed into the oil collecting barrel through the flow guide hole, so that the situation that the lubricating oil enters the motor to influence the operation of the motor is avoided again. And the planetary reducer is effectively ensured to always keep normal operation, a client can conveniently replace the framework oil seal during overhaul, and the practicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of planetary reducers, in particular to an anti-leakage reducer. Background Art

[0002] At present, the sealing devices of traditional vertical reducers or vertical semi-direct drive power transmission systems that integrate reducers and motors mostly use lip-shaped skeleton oil seals or mechanical seals. The oil storage in mechanical seals cannot exceed the mechanical seal position, so skeleton oil seals are mostly used.

[0003] However, the lip of the skeleton oil seal is easy to wear, and the lip lubricating oil may leak after a period of use. To change this situation, the skeleton oil seal needs to be replaced. It is difficult to replace the skeleton oil seal on site, and it is necessary to wait for overhaul to replace the skeleton oil seal, which affects the normal operation of the equipment. Therefore, a leakage-proof reducer is proposed to solve the above problem. Utility Model Content

[0004] The utility model aims to provide a leakage-proof reducer, which solves the technical problem that it is difficult to replace the skeleton oil seal on site after the lip lubricating oil leaks, and the skeleton oil seal needs to be replaced only when overhaul is performed, which affects the normal operation of the equipment.

[0005] To achieve the above purpose, the utility model provides a leakage-proof reducer, including: a planetary reducer housing, an input shaft is arranged in the planetary reducer housing, a rolling bearing is arranged between the planetary reducer housing and the input shaft, and a planetary reducer end cover is arranged below the rolling bearing.

[0006] A sealing device is arranged inside the planetary reducer, and the sealing device comprises: a skeleton oil seal arranged on the inner side of the planetary reducer end cover, the lip of the skeleton oil seal contacts the outer circle of the input shaft, a motor rotor flange is arranged below the planetary reducer end cover, a guide hole is arranged on the top surface of the motor rotor flange, and the guide hole is connected to the oil collecting barrel.

[0007] Preferably, the upper end of the motor rotor flange is provided with a plurality of flange upper end oil retaining rings, the bottom surface of the planetary reducer end cover is provided with a plurality of grooves, and the flange upper end oil retaining rings are rotatably connected to the grooves.

[0008] Preferably, a flange step is provided at the joint position between the motor rotor flange and the input shaft, and the top surface of the flange step is in contact with the bottom surface of the step of the input shaft.

[0009] Preferably, an annular groove is provided on the upper end surface of the motor rotor flange, the annular groove is directly above the guide hole, and the annular groove is communicated with the guide hole.

[0010] Preferably, the planetary reducer housing comprises an outer housing and an inner housing, and the outer housing and the inner housing are integrally formed.

[0011] Preferably, the input shaft is connected to the inner housing via the rolling bearing.

[0012] Preferably, the bottom end of the planetary reducer housing is connected to the lower end housing of the motor, and the lower end housing of the motor is provided with a transition support.

[0013] Preferably, an assembly hole is provided at the axis position of the transition support, and the axis position of the transition support is higher than the edge position, the transition support is detachably connected to a bearing plate, and the oil collecting barrel is placed above the bearing plate.

[0014] Preferably, the oil collecting barrel is arranged below the planetary reducer housing, and the bottom of the oil collecting barrel is connected to an oil guide pipe, and the oil guide pipe is connected to a waste oil barrel.

[0015] Preferably, a flange lower end oil retaining ring is provided at the lower end of the motor rotor flange, and the outer side surface of the flange lower end oil retaining ring is rotatably connected to the inner side surface of the oil collecting barrel.

[0016] Compared with the above-mentioned background technology, the utility model provides a leakage-proof reducer, which prevents lubricating oil from leaking into the interior of the motor and affecting the operation of the motor through a skeleton oil seal. After the lip of the skeleton oil seal is worn and leaks, the leaked oil is directly transported to the oil collecting barrel through the guide hole, thereby again preventing the lubricating oil from entering the interior of the motor and affecting the operation of the motor. The double-seal setting effectively ensures that the planetary reducer always maintains normal operation until the skeleton oil seal is replaced when the customer is convenient for overhaul, which is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] FIG1 is a cross-sectional schematic diagram provided by an embodiment of the utility model;

[0019] FIG. 2 is a partial enlarged schematic diagram provided by an embodiment of the utility model.

[0020] Specifically, 1- planetary reducer housing; 2- transition support; 3- oil collecting barrel; 4- motor stator; 5- motor rotor flange; 501- oil retaining ring at the upper end of the flange; 502- flange step; 503- flow guide hole; 504- oil retaining ring at the lower end of the flange; 6- planetary reducer end cover; 7- inner housing; 8- input shaft; 9- rolling bearing; 10- groove; 11- skeleton oil seal; 12- oil guide pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] As shown in Figures 1 and 2, an anti-leakage reducer includes: a planetary reducer housing 1, an input shaft 8 is arranged in the planetary reducer housing 1, a rolling bearing 9 is arranged between the planetary reducer housing 1 and the input shaft 8, the input shaft 8 is connected to the inner housing 7 through the rolling bearing 9, the rolling bearing 9 is arranged to avoid direct contact and friction between the input shaft 8 and the inner housing 7, and a planetary reducer end cover 6 is arranged below the rolling bearing 9 to close the planetary reducer housing 1.

[0024] A sealing device is arranged inside the planetary reducer, and the sealing device comprises: a skeleton oil seal 11 arranged on the inner side of the planetary reducer end cover 6, the skeleton oil seal is mainly used to seal the lubricating oil at the joint of the input shaft 8 and the rolling bearing 9 to prevent the lubricating oil from leaking into the motor and affecting the operation of the motor, and to ensure that the rolling bearing 9 can operate stably, the lip of the skeleton oil seal 11 is in contact with the outer circle of the input shaft 8, the motor rotor flange 5 is arranged below the planetary reducer end cover 6, the top surface of the motor rotor flange 5 is arranged with a guide hole 503, the guide hole 503 is connected to the oil collecting barrel 3, after the lip of the skeleton oil seal 11 is worn and leaked, the leaked lubricating oil is directly transported to the oil collecting barrel 3 through the guide hole 503, and the lubricating oil is again prevented from entering the motor and affecting the operation of the motor.

[0025] Two or more grooves 10 are arranged on the planetary reducer end cover 6, and a plurality of flange upper end oil retaining rings 501 are arranged on the upper end of the motor rotor flange 5. The flange upper end oil retaining rings 501 correspond to one groove 10 respectively. Even when the conveying shaft rotates at a high speed, the lubricating oil will not enter the inside of the motor stator 4 and the motor rotor flange 5 due to centrifugal action. The flange upper end oil retaining ring 501 can still effectively block the lubricating oil and prevent the lubricating oil from flowing out. It should be noted that the flange upper end oil retaining ring 501 is connected to the groove 10 so as to be relatively rotatable.

[0026] In one embodiment of the utility model, a flange step 502 is provided at the joint position of the motor rotor flange 5 and the input shaft 8 to prevent the lubricating oil from entering the joint surface of the motor rotor flange 5 and the input shaft 8 while flowing downward along the planetary reducer end cover and the input shaft 8, thereby effectively avoiding affecting the torque transmission capacity.

[0027] As shown in Figure 1, the motor stator 4 is rotatably connected to the motor rotor flange 5, and the electronic rotor flange is fixedly connected to the lower end of the input shaft 8 by a number of bolts. A step is set at the edge of the lower end surface of the input shaft 8, and the step is fixedly connected to the motor rotor flange 5 by bolts. The top surface of the flange step 502 is in contact with the bottom surface of the step of the input shaft 8, so as to prevent the lubricating oil from directly entering the joint surface between the motor rotor flange 5 and the input shaft 8 from the input shaft 8, thereby avoiding affecting the torque transmission capacity.

[0028] In one embodiment of the utility model, an annular groove is provided on the upper end surface of the motor rotor flange 5, and the annular groove is provided between the flange step 502 and the oil retaining ring 501 at the upper end of the flange, and the annular groove is directly above the guide hole 503, and the annular groove is connected with the guide hole 503. Due to the effect of gravity, the lubricating oil will flow downward along the planetary reducer end cover 6 and the input shaft 8, so that the lubricating oil can be ensured to drip into the annular groove of the motor rotor flange 5, and then smoothly enter the oil collecting barrel 3 through the guide hole 503, thereby further preventing the lubricating oil from flowing out.

[0029] It should be noted that the planetary reducer housing 1 includes an outer housing and an inner housing 7, which are integrally formed. The inner housing 7 is mainly used to encapsulate the internal transmission components of the planetary reducer to ensure that the internal components and lubricating oil of the planetary reducer are precisely sealed, wherein the inner housing 7 is connected to the input shaft 8 through a rolling bearing 9 to ensure the power transmission efficiency of the input shaft. The outer housing is mainly used to fix the planetary reducer as a whole, and to fix the motor stator 4 inside the planetary reducer, for the overall assembly of the planetary reducer. In addition, a number of positioning holes are set at the lower end of the planetary reducer housing 1, and the positioning holes are used to pass the bolt rod to fix the planetary reducer on the equipment.

[0030] In one embodiment of the utility model, the bottom end of the planetary reducer housing 1 is connected to the lower end housing of the motor, and the bottom end of the outer housing is specifically connected to the lower end housing of the motor. The lower end housing of the motor is provided with a transition support 2, and an assembly hole is provided at the axis position of the transition support 2, and the axis position of the transition support 2 is higher than the edge position, that is, a certain space is reserved below the axis position of the transition support 2, so as to facilitate the installation of the oil guide pipe 12 at the bottom of the oil collecting barrel 3. On the other hand, the transition support 2 is detachably connected to the bearing plate, and the bearing plate can be connected to the transition support 2 by bolts, and the oil collecting barrel 3 is placed above the bearing plate, which is convenient for the disassembly and assembly of the overall equipment. It is also possible to choose to set a placement groove at the top of the transition support 2, that is, the transition support 2 and the bearing plate are integrally arranged, and the bearing plate is no longer separated separately. It is preferred to select the transition support 2 to be detachably connected to the bearing plate. By setting the bearing plate detachably, before installing the oil collecting barrel, the bearing plate can be first installed on the oil collecting barrel, and then the bearing plate and the oil collecting barrel can be fixed together on the transition support 2, and finally the oil guide pipe 12 is installed at the bottom of the oil collecting barrel through the bearing plate.

[0031] In addition, the transition support can be made of a material with certain elastic properties, such as rubber, silicone, etc. Since the planetary reducer will have a certain vibration force during operation, the transition support made of elastic material can reduce the shaking of the oil collecting barrel, thereby enhancing the overall stability of the oil collecting barrel.

[0032] In one embodiment of the utility model, the oil collecting barrel 3 is arranged below the planetary reducer housing 1, and the bottom of the oil collecting barrel 3 is connected to the oil guide pipe 12, and the oil guide pipe 12 is connected to the waste oil barrel. By observing whether there is lubricating oil leakage from the oil guide pipe 12, the wear and failure of the skeleton oil seal 11 can be discovered in time, thereby playing the role of early warning whether the skeleton oil seal 11 has failed, reminding the customer that the skeleton oil seal 11 needs to be replaced.

[0033] It should be noted that the oil guide pipe 12 is located below the oil collecting barrel 3 as a whole to ensure that the lubricating oil in the oil collecting barrel 3 can still enter the oil guide pipe 12 and be discharged smoothly when there is no power output. A one-way control valve can be set at the connection between the oil collecting barrel 3 and the oil guide pipe 12. When there is a certain amount of lubricating oil in the oil collecting barrel 3, the one-way control valve opens, and the lubricating oil in the oil collecting barrel 3 enters the oil guide pipe 12 through the one-way control valve, and is further discharged through the oil guide pipe 12. Even in an unsupervised state, it can still ensure that the oil collecting barrel 3 always receives and discharges normally, avoiding the oil collecting barrel 3, and facilitating centralized collection. Moreover, the one-way control valve can effectively prevent the lubricating oil in the oil guide pipe 12 from flowing back into the oil collecting barrel 3, prevent the lubricating oil from flowing back into the oil collecting barrel 3, and further prevent the lubricating oil in the oil collecting barrel 3 from overflowing or even flowing back into the planetary reducer, thereby improving the safety of the overall equipment during operation.

[0034] The lower end of the motor rotor flange 5 is provided with a flange lower end oil retaining ring 504, and the outer side surface of the flange lower end oil retaining ring 504 is rotatably connected to the inner side surface of the oil collecting barrel 3. The flange lower end oil retaining ring 504 serves to prevent the lubricating oil from flowing out of the oil collecting barrel 3 to ensure that the lubricating oil enters the oil collecting barrel 3 and is completely discharged into the waste oil barrel outside the planetary reducer through the oil guide pipe 12.

[0035] When the utility model is in use, after the skeleton oil seal 11 has been used for a period of time, the lip of the skeleton oil seal 11 is worn, and a small amount of lubricating oil leaks through the lip of the skeleton oil seal 11. Under the action of gravity, the lubricating oil will flow down along the end cover and the input shaft 8 and finally enter the annular groove. The lubricating oil entering the annular groove passes through the guide hole 503 and then enters the oil collecting barrel 3. After the lubricating oil enters the oil collecting barrel 3, it is discharged to the waste oil barrel outside the motor or planetary reducer through the oil guide pipe 12. The skeleton oil seal 11 and the guide hole 503 are led out, and the double sealing setting method ensures that the lubricating oil will not enter the interior of the planetary reducer, and the planetary reducer can always maintain normal operation.

[0036] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0037] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the utility model.

Claims

1. A leakage-proof reducer, characterized in that: include: A planetary reducer housing, wherein an input shaft is arranged in the planetary reducer housing, a rolling bearing is arranged between the planetary reducer housing and the input shaft, and a planetary reducer end cover is arranged below the rolling bearing; A sealing device is arranged inside the planetary reducer, and the sealing device comprises: a skeleton oil seal arranged on the inner side of the planetary reducer end cover, the lip of the skeleton oil seal contacts the outer circle of the input shaft, a motor rotor flange is arranged below the planetary reducer end cover, a guide hole is arranged on the top surface of the motor rotor flange, and the guide hole is connected to the oil collecting barrel.

2. The anti-leakage reducer according to claim 1, characterized in that: The upper end of the motor rotor flange is provided with a plurality of flange upper end oil retaining rings, the bottom surface of the planetary reducer end cover is provided with a plurality of grooves, and the flange upper end oil retaining rings are rotatably connected to the grooves.

3. The anti-leakage reducer according to claim 2, characterized in that: A flange step is provided at the joint position between the motor rotor flange and the input shaft, and the top surface of the flange step is in contact with the bottom surface of the step of the input shaft.

4. The anti-leakage reducer according to claim 1, characterized in that: An annular groove is arranged on the upper end surface of the motor rotor flange, the annular groove is directly above the guide hole, and the annular groove is communicated with the guide hole.

5. The anti-leakage reducer according to claim 1, characterized in that: The planetary reducer housing comprises an outer housing and an inner housing, and the outer housing and the inner housing are integrally formed.

6. The anti-leakage reducer according to claim 5, characterized in that: The input shaft is connected to the inner housing via the rolling bearing.

7. The anti-leakage reducer according to claim 1, characterized in that: The bottom end of the planetary reducer housing is connected to the lower end housing of the motor, and the lower end housing of the motor is provided with a transition support.

8. The anti-leakage reducer according to claim 7, characterized in that: An assembly hole is arranged at the axis position of the transition support, and the axis position of the transition support is higher than the edge position. The transition support is detachably connected to a bearing plate, and the oil collecting barrel is placed above the bearing plate.

9. The anti-leakage reducer according to claim 1, characterized in that: The oil collecting barrel is arranged below the planetary reducer housing, and the bottom of the oil collecting barrel is connected to an oil guide pipe, and the oil guide pipe is connected to a waste oil barrel.

10. The anti-leakage reducer according to claim 1, characterized in that: The lower end of the motor rotor flange is provided with a flange lower end oil retaining ring, and the outer side surface of the flange lower end oil retaining ring is rotatably connected to the inner side surface of the oil collecting barrel.

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