A reduction gearbox input shaft sealing device

Abstract

The application discloses a kind of input shaft sealing devices of reduction gearbox, including box, protective cover is fixedly installed on the box by screw, annular structure's first sealing flange is fixedly installed in sealing cylinder, fixed assembly is detachably connected on input shaft, fixed assembly includes second buckle, half-ring structure's mounting plate is fixedly installed on the outer side surface of second buckle, mounting column is fixedly installed on mounting plate, sealing plate is slidably installed on mounting column, sealing ring is fixedly installed on the outer side surface of sealing plate, sealing washer outer side surface and sealing cylinder inner side surface slide contact, annular structure's second sealing flange is slidably installed in sealing cylinder, and second sealing flange and sealing plate side surface slide contact.The application can be sealed from the inside and outside of input shaft, improve the effect of input shaft sealing, and be conducive to the continuous use of input shaft.

Description

TECHNICAL FIELD

[0001] The application relates to a sealing device for an input shaft of a reduction gearbox. BACKGROUND

[0002] A reduction gear matches rotational speeds and transmits torque between a prime mover and a working machine or an actuator, and is widely used in modern machines. The reduction gear can be divided into general reduction gears and special reduction gears, and the design, manufacturing and use characteristics of the two are different.

[0003] The input shaft of the reduction gear needs to be sealed during use. The existing sealing device cannot be sealed and connected from the inside and outside of the input shaft during use, the sealing effect of the input shaft is reduced, the continuous use of the input shaft is not conducive, and the device is not convenient to disassemble from the input shaft during subsequent maintenance, convenience is reduced, and use is not conducive. SUMMARY

[0004] The application aims to provide a sealing device for an input shaft of a reduction gearbox to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme.

[0006] A sealing device for an input shaft of a reduction gearbox comprises a box body, a protective cover fixedly installed on the box body through screws, a first sealing flange of an annular structure fixedly installed in a sealing cylinder, a fixed assembly detachably connected to the input shaft, the fixed assembly comprising a second buckle, an installation plate of a semi-annular structure fixedly installed on the outer surface of the second buckle, an installation column fixedly installed on the installation plate, a sealing plate slidingly installed on the installation column, a sealing ring fixedly installed on the outer side surface of the sealing plate, the outer side surface of the sealing ring in sliding contact with the inner side surface of the sealing cylinder, a second sealing flange of an annular structure slidingly installed in the sealing cylinder, and the second sealing flange in sliding contact with the side surface of the sealing plate.

[0007] The fixed assembly further comprises a first buckle, the first buckle is provided with multiple groups and is in a semi-cylindrical structure, a first sealing gasket of a semi-cylindrical structure is fixedly installed on the inner wall of the first buckle, and the first buckle and the first sealing gasket can form a complete cylindrical structure and the inner diameter of the first sealing gasket is the same as the diameter of the input shaft.

[0008] The second buckle is provided with multiple groups and is in a semi-cylindrical structure, a second sealing gasket of a semi-cylindrical structure is fixedly installed on the inner wall of the second buckle, and the second buckle and the second sealing gasket can form a complete cylindrical structure and the inner diameter of the second sealing gasket is the same as the outer diameter of the first buckle.

[0009] The first buckle and the second buckle are provided with through holes, a connecting rod is slidably installed in the through holes, one end of the connecting rod is fixedly installed with a connecting plate, the other end of the connecting rod is slidably installed with a pressing plate, and a first fixing nut is threadedly connected with the pressing plate.

[0010] Compared with the prior art, the beneficial effects of the application are that the sealing connection can be performed from the inner and outer sides of the input shaft, the sealing effect of the input shaft is improved, the continuous use of the input shaft is facilitated, the device is convenient to disassemble from the input shaft during subsequent maintenance, the convenience is improved, the speed and efficiency of the maintenance are improved, and use is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a front view of the application.

[0012] Figure 2 It is Figure 1 It is an enlarged view of A1 in the figure.

[0013] Figure 3 It is a right view of the application.

[0014] Figure 4 It is a front view of the connecting rod in the application.

[0015] 1, box body; 2, protective cover; 3, sealing cylinder; 4, first sealing flange; 5, first buckle; 6, first sealing gasket; 7, second buckle; 8, second sealing gasket; 9, connecting plate; 10, connecting rod; 11, pressing plate; 12, first fixing nut; 13, mounting plate; 14, mounting column; 15, sealing plate; 16, sealing ring; 17, second sealing flange; 18, limiting screw; 19, second fixing nut; 20, fixing assembly. DETAILED DESCRIPTION

[0016] The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0017] Please refer to Figures 1-4 A sealing device for an input shaft of a reduction gearbox, comprising a box body 1, a protective cover 2 is fixedly installed on the box body 1 through screws, a sealing cylinder 3 is fixedly installed on the box body 1 and surrounds the input shaft, a first sealing flange 4 of an annular structure is fixedly installed in the sealing cylinder 3, a fixing assembly 20 is detachably connected to the input shaft, the fixing assembly 20 comprises a second buckle 7, a mounting plate 13 of a semi-annular structure is fixedly installed on the outer side surface of the second buckle 7, a mounting column 14 is fixedly installed on the mounting plate 13, a sealing plate 15 is slidably installed on the mounting column 14, a sealing ring 16 is fixedly installed on the outer side surface of the sealing plate 15, the outer side surface of the sealing ring 16 is in sliding contact with the inner side surface of the sealing cylinder 3, a second sealing flange 17 of an annular structure is slidably installed in the sealing cylinder 3, and the second sealing flange 17 is in sliding contact with the side surface of the sealing plate 15.

[0018] The protective cover 2 is threadedly connected with multiple groups of evenly distributed limiting screws 18, which are used in cooperation with the second sealing flange 17.

[0019] The sealing plate 15 is arranged in an annular structure and the inner side surface of the sealing plate 15 is in sliding contact with the outer side surface of the second buckle 7, and the side surface of the sealing plate 15 is in sliding contact with the first sealing flange 4.

[0020] The mounting column 14 is threadedly connected with a second fixing nut 19 for pressing the sealing plate 15 against the mounting plate 13.

[0021] In actual application, the fixing assembly 20 is installed at a proper position on the input shaft, then the sealing plate 15 is installed on the mounting column 14, the sealing plate 15 is pressed against the mounting plate 13 by the second fixing nut 19 and the side surface of the sealing plate 15 is in contact with the first sealing flange 4, at this time, the sealing plate 15 can seal the connection of the mounting plate 13, then the second sealing flange 17 is installed in the sealing cylinder 3, the position of the second sealing flange 17 is limited by the limiting screw 18 so that the second sealing flange 17 is in sliding contact with the side surface of the sealing plate 15, finally, the protective cover 2 is installed on the box body 1 by screws, the fixing assembly 20 is installed on the input shaft so as to be in sealed contact with the input shaft, avoiding the leakage of the input shaft, and the outer side of the fixing assembly 20 can be in sealed contact with the sealing cylinder 3 by the sealing plate 15, the sealing ring 16, the first sealing flange 4 and the second sealing flange 17, thereby realizing the sealed connection of the inner and outer sides of the input shaft, improving the sealing effect of the input shaft, facilitating the continuous use of the input shaft, and the fixing assembly 20 is convenient to disassemble from the input shaft during subsequent maintenance, improving the convenience, the speed and efficiency of maintenance, and being beneficial to use.

[0022] The second buckle 7 is provided with multiple groups and arranged in a half-cylindrical structure, the second sealing gasket 8 in a half-cylindrical structure is fixedly installed on the inner wall of the second buckle 7, and the second buckle 7 and the second sealing gasket 8 can form a complete cylindrical structure and the inner diameter of the second sealing gasket 8 is the same as the outer diameter of the first buckle 5.

[0023] The first buckle 5 and the second buckle 7 are both provided with through holes, the connecting rods 10 are slidingly installed in the through holes, the connecting rods 10 are fixedly installed with the connecting plates 9 at one end, the connecting rods 10 are slidingly installed with the pressing plates 11 at the other end, and the first fixing nuts 12 are threadedly connected with the pressing plates 11.

[0024] In actual application, the first buckles 5 are respectively installed on the input shaft from both sides of the input shaft, so that the complete cylindrical structure formed by the first buckles 5 surrounds the input shaft, at this time, the first sealing gasket 6 is in close contact with the input shaft, the connecting rods 10 are respectively inserted into the through holes of the two groups of first buckles 5, then the pressing plate 11 is installed at the end of the connecting rod 10 away from the connecting plate 9, then the pressing plate 11 is pressed on the first buckles 5 through the first fixing nut 12, then the second buckles 7 are installed on the first buckles 5 from both sides of the first buckles 5 and the connecting seams of the second buckles 7 are staggered with the connecting seams of the first buckles 5, then the second buckles 7 are fixed through the connecting rods 10, the pressing plate 11 and the first fixing nut 12, at this time, the sealing connection with the input shaft is ensured through the first sealing gasket 6 and the second sealing gasket 8.

Claims

1. A reduction gearbox input shaft sealing device, comprising a housing, characterized in that: A protective cover is fixedly installed on the box body by screws, a first sealing flange with an annular structure is fixedly installed in the sealing cylinder, a fixing assembly is detachably connected to the input shaft, the fixing assembly includes a second clip, a mounting plate with a semi-annular structure is fixedly installed on the outer surface of the second clip, a mounting column is fixedly installed on the mounting plate, a sealing plate is slidably installed on the mounting column, a sealing ring is fixedly installed on the outer side of the sealing plate, the outer surface of the sealing gasket is in sliding contact with the inner side of the sealing cylinder, a second sealing flange with an annular structure is slidably installed in the sealing cylinder, and the second sealing flange is in sliding contact with the side of the sealing plate; The fixing assembly further includes a first clip, which is provided in multiple groups and is arranged in a semi-cylindrical structure. A first sealing gasket of the semi-cylindrical structure is fixedly mounted on the inner wall of the first clip. The first clip and the first sealing gasket can form a complete cylindrical structure, and the inner diameter of the first sealing gasket is the same as the diameter of the input shaft. The second clips are provided in multiple groups and are arranged in a semi-cylindrical structure. A second sealing gasket of the semi-cylindrical structure is fixedly mounted on the inner wall of the second clips. The second clips and the sealing gasket can form a complete cylindrical structure, and the inner diameter of the second sealing gasket is the same as the outer diameter of the first clips. A through hole is provided on both the first clip and the second clip, a connecting rod is slidably installed in the through hole, a connecting plate is fixedly installed on one end of the connecting rod, a pressure plate is slidably installed on the other end of the connecting rod, and a first fixing nut used in conjunction with the pressure plate is threadedly connected to the connecting rod.

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