CN216430459U - Sealing structure of speed reducer - Google Patents

Abstract

The utility model relates to a speed reducer technical field specifically is a seal structure of speed reducer, including the inside bottom be equipped with the casing of die cavity and set up in the inside output shaft of casing through deep groove ball bearing rotation, casing open-top department is equipped with annular apron, casing bottom opening part is equipped with the skeleton oil blanket, be equipped with open-top's cavity annular oil return dish in the die cavity of the inside bottom of casing, the oil return dish is inside to be equipped with the sealed clamp plate of its open-top along its endwise slip, be equipped with on the output shaft and drive the clamp plate along oil return dish endwise slip's drive division, the clamp plate bottom is equipped with the second spring. The utility model discloses a drive division drive clamp plate reciprocates to progressively discharge the inside top of casing with the fluid of die cavity, reduce the oil pressure of the die cavity of the inside bottom of casing with this, thereby reduce because of the too high phenomenon that leads to fluid to take place the seepage through output shaft and casing junction of oil pressure.

Description

Sealing structure of speed reducer

Technical Field

The utility model relates to a speed reducer technical field specifically is a seal structure of speed reducer.

Background

The speed reducer is generally used for low-rotating-speed and large-torque transmission equipment, the purpose of reducing the speed of a motor, an internal combustion engine or other high-speed running power is achieved by meshing a gear with a large gear on an output shaft through a gear with a small number of teeth on an input shaft of the speed reducer, the improvement of the overall performance of the speed reducer is always restricted by the sealing performance of the speed reducer, poor bearing lubrication can be caused once the speed reducer leaks oil, an oil film on the meshing surface of the gear is not easy to form, the safety and the reliability of the speed reducer are influenced, and the production efficiency and the quality of the whole production equipment are directly influenced

The existing speed reducer mostly adopts the framework oil seal to seal the opening end of the shell and the gap of the output shaft in the actual use process, and the gap is generated between the bearing and the output shaft due to slight vibration of the speed reducer in the working state, and the temperature of oil liquid in the shell can be increased by the work of the speed reducer, so that the oil pressure is increased, and the oil seepage phenomenon is caused.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a seal structure of speed reducer can reduce the oil pressure in the die cavity of the inside bottom of casing, has solved current speed reducer and has leaded to fluid to take place the problem of seepage through output shaft and casing junction because of the inside oil pressure of casing is too high.

(II) technical scheme

For the purpose that realizes the above-mentioned oil pressure that can reduce the die cavity of the inside bottom of casing, the utility model provides a following technical scheme: a sealing structure of a speed reducer comprises a shell with a cavity at the bottom inside and an output shaft arranged inside the shell in a rotating mode through a deep groove ball bearing, wherein an annular cover plate is arranged at the opening of the top of the shell, a framework oil seal is arranged at the opening of the bottom of the shell, a hollow annular oil return disc with an opening at the top is arranged at the bottom of the inside of the shell at the cavity, a pressing plate for sealing the opening at the top of the oil return disc is arranged inside the oil return disc in an axial sliding mode, a driving portion for driving the pressing plate to slide along the axial direction of the oil return disc is arranged on the output shaft, a second spring is arranged at the bottom of the pressing plate, an oil inlet for communicating the inside of the oil return disc with the cavity at the bottom of the inside of the shell is formed in the bottom of the oil return disc, a blocking plate is arranged at the bottom of the second spring above the oil inlet, and an oil return pipe for communicating the inside of the oil return disc with the top of the inside of the shell is arranged on the pressing plate in a penetrating mode, the top of the oil return pipe is provided with a plugging ring, and a first spring is connected between the plugging ring and the annular cover plate.

Optionally, the oil return pipe with the inlet port is a plurality of, and a plurality of the oil return pipe is followed the circumferencial direction equidistance of clamp plate distributes, a plurality of the inlet port sets up along the circumferencial direction equidistance of the dish that returns.

Optionally, the diameter of the oil inlet is smaller than that of the plugging plate, and a circular sealing gasket with the same diameter is bonded at the bottom of the plugging plate.

Optionally, a sealing gasket of an annular structure is bonded to the bottom of the blocking ring, and the top end of the oil return pipe abuts against the sealing gasket.

Optionally, the drive division including weld in the annular drive plate of output shaft outer wall, the bottom of drive plate is provided with the slider along its circumferencial direction equidistance, the clamp plate upper surface seted up with the annular slide rail of slider looks adaptation, the equidistance is provided with the arch in the slide rail.

Optionally, the sliding block is a ball arranged at the bottom of the driving plate in a rolling manner, and the driving plate rolls in the sliding rail through the ball.

(III) advantageous effects

Compared with the prior art, the utility model provides a seal structure of speed reducer possesses following beneficial effect:

1. the utility model discloses a set up oil return dish, clamp plate, drive division, second spring, inlet port, shutoff board, oil return pipe, shutoff ring and first spring, when the speed reducer is worked, through the up-and-down movement of drive division drive clamp plate, gradually discharge the fluid in the die cavity into the inside top of casing to reduce the oil pressure in the die cavity of the inside bottom of casing, thereby reduce the phenomenon that the fluid leaks through output shaft and casing junction because of the oil pressure is too high;

2. the utility model discloses a sealed pad bonds at the shutoff board bottom, and when the clamp plate moved down, the circular sealed pad can be with the oil inlet complete shutoff, avoids the fluid in the oil return dish to flow back to the die cavity of the inside bottom of casing through the oil inlet;

3. the utility model discloses a set up the slider into the ball, when the drive plate was rotatory, for rolling contact between slider and the arch, effectively reduced the frictional force between it to the resistance of receiving of drive plate has been reduced.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is an enlarged schematic structural view of fig. 1 of the present invention;

FIG. 3 is a schematic view of a partial structure of the present invention;

fig. 4 is a schematic view of the partial sectioning structure of the present invention.

In the figure: 1. a housing; 2. an oil return plate; 3. a cavity; 4. framework oil seal; 5. an output shaft; 6. a cover plate; 7. a deep groove ball bearing; 8. an oil return pipe; 9. a plugging ring; 10. a first spring; 11. pressing a plate; 12. a second spring; 13. an oil inlet hole; 14. a plugging plate; 15. a slide rail; 16. a slider; 17. a protrusion; 18. A drive plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example (b): referring to fig. 1 to 4, an embodiment of the present invention provides a technical solution: a sealing structure of a speed reducer comprises a shell 1 with a cavity 3 at the bottom inside and an output shaft 5 rotatably arranged inside the shell 1 through a deep groove ball bearing 7, an annular cover plate 6 is arranged at the opening at the top of the shell 1, a framework oil seal 4 is arranged at the opening at the bottom of the shell 1, a hollow annular oil return disc 2 with an opening at the top is arranged in the cavity 3 at the bottom inside the shell 1, a pressing plate 11 for sealing the opening at the top is arranged inside the oil return disc 2 along the axial direction of the oil return disc, a driving part for driving the pressing plate 11 to slide along the axial direction of the oil return disc 2 is arranged on the output shaft 5, the driving part comprises an annular driving plate 18 welded on the outer wall of the output shaft 5, sliders 16 are arranged at the bottom of the driving plate 18 along the circumferential direction at equal intervals, an annular sliding rail 15 matched with the sliders 16 is arranged on the upper surface of the pressing plate 11, bulges 17 are arranged at equal intervals in the sliding rail 15, and a second spring 12 is arranged at the bottom of the pressing plate 11, an oil inlet hole 13 which communicates the inside of the oil return disc 2 with a cavity 3 at the bottom end inside the shell 1 is formed in the bottom of the oil return disc 2, a plugging plate 14 is arranged at the bottom of a second spring 12 positioned above the oil inlet hole 13, an oil return pipe 8 which communicates the inside of the oil return disc 2 with the top end inside the shell 1 is arranged on a pressing plate 11 in a penetrating mode, a plugging ring 9 is arranged at the top of the oil return pipe 8, a first spring 10 is connected between the plugging ring 9 and an annular cover plate 6, when the speed reducer works, an output shaft 5 rotates to drive a driving plate 18 to rotate, under the elastic force of the second spring 12, the driving plate 18 pushes the pressing plate 11 to move up and down through the matching of a sliding block 16 at the bottom and a bulge 17, when the pressing plate 11 moves down, the second spring 12 is compressed, the plugging plate 14 plugs the oil inlet hole 13, meanwhile, the volume inside the oil return disc 2 is reduced through the downward movement of the pressing plate 11, and the oil pressure inside the oil return disc 2 is increased, oil in the time of returning oil pan 2 is discharged to the inside top of casing 1 through returning oil pipe 8, and when clamp plate 11 moves up, the elastic potential energy of second spring 12 is released, fluid then can enter into back oil pan 2 through inlet port 13 in the cavity 3 of the inside bottom of casing 1, reduce the oil pressure in the cavity 3 of the inside bottom of casing 1 with this, thereby reduce because of the too high phenomenon that leads to fluid to pass through output shaft 5 and casing 1 junction emergence seepage of oil pressure, when clamp plate 11 moves up, can drive back oil pipe 8 and move up, it then can only support the bottom of shutoff ring 9 to return oil pipe 8, and compress first spring 10, make the fluid on the inside top of casing 1 can not enter into back oil pan 2 through returning oil pipe 8.

In order to guarantee that the oil pressure of each position in the die cavity 3 of the inside bottom of casing 1 is even, on the basis of above-mentioned embodiment, the oil pipe 8 that returns of this embodiment and inlet port 13 are a plurality of, a plurality of oil pipe 8 that return distributes along the circumferencial direction equidistance of clamp plate 11, a plurality of inlet port 13 sets up along the circumferencial direction equidistance of the dish 2 that returns, the inlet port 13 that the equidistance set up, make the fluid in the die cavity 3 of the inside bottom of casing 1 can be even enter into in the dish 2 that returns, the oil pipe 8 that the equidistance set up, make the fluid in the dish that returns 2 that has the top in can evenly discharging casing 1.

In order to improve the sealing performance between the oil inlet 13 and the plugging plate 14 during oil discharge of the oil return disc 2, thereby ensuring the oil pressure reduction effect at the inner bottom end of the casing 1, on the basis of the above embodiments, the diameter of the oil inlet 13 of the embodiment is smaller than that of the plugging plate 14, and the bottom of the plugging plate 14 is bonded with a circular sealing gasket with the same diameter as that of the oil inlet 13, when the pressing plate 11 moves down, the circular sealing gasket can completely plug the oil inlet 13, so as to prevent the oil in the oil return disc 2 from flowing back to the cavity 3 at the inner bottom end of the casing 1 through the oil inlet 13.

In order to improve the sealing performance between the oil return pipe 8 and the sealing plate 14 during the oil inlet period of the oil return disc 2, on the basis of the above embodiments, the bottom of the sealing ring 9 of this embodiment is bonded with a sealing gasket with an annular structure, the top end of the oil return pipe 8 abuts against the sealing gasket, and when the pressing plate 11 moves upwards, the top end of the oil return pipe 8 abuts against the sealing gasket at the bottom of the sealing ring 9, so that the oil at the top end inside the housing 1 can be prevented from returning to the cavity 3 of the housing 1 through the return pipe.

In order to reduce the resistance of the driving plate 18 and further reduce the negative pressure of the output shaft 5, on the basis of the above embodiments, the sliding blocks 16 of the present embodiment are balls rolling on the bottom of the driving plate 18, the driving plate 18 rolls in the sliding rails 15 through the balls, and when the driving plate 18 rotates, the sliding blocks 16 and the protrusions 17 are in rolling contact, so that the friction force between the sliding blocks 16 and the protrusions is effectively reduced, and the resistance received by the driving plate 18 is reduced.

The working principle is as follows: when the speed reducer works, the output shaft 5 rotates to drive the driving plate 18 to rotate, under the elastic force of the second spring 12, the driving plate 18 pushes the pressing plate 11 to move up and down back and forth through the matching of the slider 16 at the bottom and the bulge 17, when the pressing plate 11 moves downwards, the second spring 12 is compressed, the oil inlet hole 13 is plugged by the plugging plate 14, meanwhile, the volume in the oil return disc 2 is reduced by the downward movement of the pressing plate 11, so that the oil pressure in the oil return disc 2 is increased, the oil in the oil return disc 2 is discharged into the top end in the shell 1 through the oil return pipe 8, when the pressing plate 11 moves upwards, the elastic potential energy of the second spring 12 is released, the oil in the cavity 3 at the bottom end in the shell 1 enters the oil return disc 2 through the oil inlet hole 13, so as to reduce the oil pressure in the cavity 3 at the bottom end in the shell 1, thereby reducing the phenomenon that the oil leaks through a gap between the output shaft 5 and the shell 1 due to overhigh oil pressure, when the pressing plate 11 moves upwards, the oil return pipe 8 can be driven to move upwards, the oil return pipe 8 can only abut against the bottom of the plugging ring 9, and the first spring 10 is compressed, so that oil on the top end inside the shell 1 cannot enter the oil return disc 2 through the oil return pipe 8, the sealing performance of the joint of the output shaft 5 and the shell 1 in the cavity 3 inside the shell 1 is guaranteed when the speed reducer works, and the oil leakage probability of the position is reduced.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A seal structure of speed reducer which characterized in that: the oil return device comprises a shell (1) with a cavity (3) at the inner bottom end and an output shaft (5) rotatably arranged in the shell (1) through a deep groove ball bearing (7), wherein an annular cover plate (6) is arranged at the top opening of the shell (1), a framework oil seal (4) is arranged at the bottom opening of the shell (1), a hollow annular oil return disc (2) with an open top is arranged in the cavity (3) at the inner bottom end of the shell (1), a pressing plate (11) for sealing the top opening of the oil return disc (2) is arranged in the oil return disc (2) along the axial sliding direction of the oil return disc, a driving part for driving the pressing plate (11) to axially slide along the oil return disc (2) is arranged on the output shaft (5), a second spring (12) is arranged at the bottom of the pressing plate (11), an oil inlet hole (13) for communicating the inner part of the oil return disc (2) with the cavity (3) at the inner bottom end of the shell (1) is formed at the bottom end of the oil return disc (2), be located second spring (12) bottom above inlet port (13) is equipped with shutoff board (14), run through on clamp plate (11) be equipped with return oil pan (2) inside with return oil pipe (8) of the inside top intercommunication of casing (1), it is equipped with shutoff ring (9) to return oil pipe (8) top, shutoff ring (9) with be connected with first spring (10) between annular apron (6).

2. A sealing structure of a speed reducer according to claim 1, characterized in that: the oil return pipe (8) and the oil inlet hole (13) are a plurality of, and a plurality of the oil return pipe (8) are followed the circumferencial direction equidistance of clamp plate (11) distributes, a plurality of the oil inlet hole (13) are along the circumferencial direction equidistance setting of oil return dish (2).

3. A sealing structure of a speed reducer according to claim 1, characterized in that: the diameter of the oil inlet hole (13) is smaller than that of the plugging plate (14), and a circular sealing gasket with the same diameter is bonded at the bottom of the plugging plate (14).

4. A sealing structure of a speed reducer according to claim 1, characterized in that: the bottom of the plugging ring (9) is bonded with a sealing gasket in an annular structure, and the top end of the oil return pipe (8) is abutted to the sealing gasket.

5. A sealing structure of a speed reducer according to claim 1, characterized in that: the drive division including weld in annular drive plate (18) of output shaft (5) outer wall, the bottom of drive plate (18) is provided with slider (16) along its circumferencial direction equidistance, clamp plate (11) upper surface seted up with annular slide rail (15) of slider (16) looks adaptation, the equidistance is provided with arch (17) in slide rail (15).

6. A sealing structure of a speed reducer according to claim 5, wherein: the sliding block (16) is a ball arranged at the bottom of the driving plate (18) in a rolling mode, and the driving plate (18) rolls in the sliding rail (15) through the ball.

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