CN219366759U - Input end sealing structure of speed reducer - Google Patents

Abstract

The utility model relates to a speed reducer, in particular to an input end sealing structure of the speed reducer, wherein an input shaft is rotationally connected with a speed reducer box through a first bearing and a second bearing, one end, connected with a gear set arranged in the speed reducer box, of the input shaft is a bevel gear, the first bearing and the second bearing are respectively arranged on a first bearing seat and a second bearing seat, the first bearing seat is fixedly connected with the speed reducer box, the second bearing seat is fixedly connected with the first bearing seat, an input shaft end cover is sleeved on the input shaft and fixedly connected with the second bearing seat, a framework oil seal sleeved on the input shaft is arranged in the input shaft end cover, and a bearing chamber positioned between the first bearing and the framework oil seal is arranged in an inner cavity formed by the first bearing seat and the second bearing seat; and an oil return hole which is communicated with the bearing chamber and the inner cavity of the speed reducer box body is formed in the first bearing seat.

Description

Input end sealing structure of speed reducer

Technical Field

The utility model relates to a speed reducer, in particular to an input end sealing structure of the speed reducer.

Background

The speed reducer is an independent component consisting of a gear drive, a worm drive and a gear-worm drive enclosed in a rigid housing, and is commonly used as a speed reduction transmission between a driving element and a working machine. The function of matching rotational speed and transmitting torque between a prime motor and a working machine or an actuating mechanism is widely applied to modern machines. The speed reducer can be divided into a cylindrical gear speed reducer, a conical gear speed reducer and a conical-cylindrical gear speed reducer according to the shape of a gear, wherein the structure of the conical gear speed reducer and the conical-cylindrical gear speed reducer generally comprises a speed reducer box, an input shaft end cover, an output shaft end cover and a gear set which is arranged in the speed reducer box and is respectively connected with the input shaft and the output shaft, one end of the input shaft, which is connected with the gear set, is a bevel gear, namely the input shaft, is a tooth shaft type bevel gear, and is rotationally connected with the speed reducer box through two groups of bearings, namely a first bearing and a second bearing, the first bearing and the second bearing are respectively arranged on the first bearing and the second bearing, the first bearing is fixedly connected with the speed reducer box, the second bearing is fixedly connected with the first bearing, the input shaft end cover is sleeved on the input shaft and is fixedly connected with the second bearing, a framework oil seal sleeved on the input shaft is arranged in the input shaft end cover, and a bearing chamber is formed between the first bearing and the framework oil seal.

In the existing input end sealing structure, lubrication of the first bearing and the second bearing is a process that grease splashed by a bevel gear on an input shaft in a transmission process enters the bearing chamber through the first bearing and then enters the second bearing, the first bearing and the second bearing are lubricated naturally, but after a speed reducer operates for a period of time, excessive grease is accumulated in the bearing chamber, the pressure in the bearing chamber area is too high, the sealing performance of the input shaft is reduced after a period of time, namely, a framework oil seal is damaged, and grease leakage occurs.

Therefore, a new input end sealing structure of the speed reducer is urgently needed at present, so that the problem of reduced sealing performance of an input shaft caused by overhigh pressure in a bearing chamber area is solved, and the sealing performance of the speed reducer is improved.

Disclosure of Invention

In view of the above, an object of the present utility model is to provide an input end sealing structure of a speed reducer, which solves the problem of reduced sealing performance of an input shaft due to excessive pressure in a bearing chamber region, and improves sealing performance of the speed reducer.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides an input seal structure of speed reducer, includes speed reducer box, first bearing, second bearing, bearing chamber, input shaft, skeleton oil blanket, first bearing frame, second bearing frame and input shaft end cover, the input shaft pass through first bearing and second bearing with the speed reducer box rotates to be linked, just the input shaft is umbrella-shaped gear with the one end that sets up the gear train in the speed reducer box is connected, first bearing and second bearing are installed respectively on first bearing frame and second bearing frame, first bearing frame with speed reducer box rigid coupling, the second bearing frame with first bearing frame rigid coupling, the input shaft end cover is established on the input shaft and with the second bearing frame rigid coupling to be equipped with the skeleton oil blanket of cover on the input shaft in the input shaft end cover, and have the bearing chamber that is located between first bearing and the skeleton oil blanket in the inner chamber that first bearing frame and second bearing frame formed;

and an oil return hole which is communicated with the bearing chamber and the inner cavity of the speed reducer box body is formed in the first bearing seat.

Further, the framework oil seal is a double-framework oil seal, and the double-framework oil seal comprises two framework oil seals with the diameters of 80, 105 and 8 mm.

Further, the number of the oil return holes is two, and the two oil return holes are symmetrically arranged on two sides of the input shaft.

Further, the input shaft end cover is connected with the second bearing through a countersunk socket head cap bolt.

The utility model has the beneficial effects that:

according to the input end sealing structure of the speed reducer and the method for improving the sealing performance of the input end sealing structure, on the basis of the existing speed reducer, the problem of overlarge space pressure of the bearing chamber caused by grease backlog is solved by processing the oil return hole communicated with the bearing chamber and the inner cavity of the speed reducer box body on the first bearing seat, the internal pressure born by a framework oil seal is reduced, and the sealing performance of the input end of the speed reducer is improved; the depth of the input shaft end cover is increased by 8mm through processing and reforming the input shaft end cover, and the original single-framework oil seal form is changed into a double-framework oil seal form, so that the sealing performance of the speed reducer is further improved, and the service life of the speed reducer is prolonged; and the connecting bolt of the input shaft end cover and the second bearing seat is set as a countersunk inner hexagon bolt so as to avoid the coupler and prevent the connecting bolt from generating motion interference with the coupler.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of an input end sealing structure of a speed reducer in an embodiment.

Reference numerals: the speed reducer comprises a speed reducer box body 1, an oil return hole 2, a first bearing 3, a second bearing 4, a bearing chamber 5, an input shaft 6, a framework oil seal 7, a first bearing seat 8, a second bearing seat 9 and an input shaft end cover 10.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, an input end sealing structure of a speed reducer includes a speed reducer case 1, an oil return hole 2, a first bearing 3, a second bearing 4, a bearing chamber 5, an input shaft 6, a skeleton oil seal 7, a first bearing seat 8, a second bearing seat 9, and an input shaft cover 10, wherein one end of the input shaft 6 connected with a gear set disposed in the speed reducer case 1 is a bevel gear, the input shaft 6 is rotationally connected with the speed reducer case 1 through two sets of bearings, namely, the first bearing 3 and the second bearing 4 are respectively mounted on the first bearing seat 8 and the second bearing seat 9, the first bearing seat 8 is fixedly connected with the speed reducer case 1, the second bearing seat 9 is fixedly connected with the first bearing seat 8, the input shaft cover 10 is sleeved on the input shaft 6 and fixedly connected with the second bearing seat 9, two skeleton oil seals 7 sleeved on the input shaft 6 are disposed in the input shaft cover 10, and the first bearing seat 8 and the second bearing seat 9 are provided with a first bearing seat 1 and a second bearing seat 5 between the first bearing seat 1 and the first bearing seat 5 formed in an inner cavity.

The key point of the embodiment is that an oil return hole 2 which is communicated with the bearing chamber 5 and the inner cavity of the speed reducer box body 1 is arranged in the first bearing seat 8, the oil extruded in the bearing chamber 5 flows back to the inner cavity of the speed reducer box body 1 through the oil return hole 2, so that oil leakage is reduced, the problem that the internal pressure of the bearing chamber 5 is generated due to overlarge oil backlog is solved, the internal pressure born by the framework oil seal 7 is reduced, and the sealing performance is improved; and when the grease in the bearing chamber 5 is insufficient, lubricating grease can be provided for the first bearing 3 and the second bearing 4 through the oil return hole 2, so that the service life of the bearing is prolonged.

Specifically, the input shaft end cover 10 is connected with the second bearing seat 9 through a socket head cap with a through hole, so as to avoid motion interference between the input shaft end cover 10 and a connecting bolt of the second bearing seat 9 and a coupling connected with the input shaft 6, and the two oil return holes 2 are symmetrically arranged on two sides of the input shaft 6.

In this embodiment, by performing the processing transformation on the input shaft end cover 10, the depth of the input shaft end cover 10 is increased by 8mm, and the single-skeleton oil seal form in the prior art is changed into the double-skeleton oil seal form, that is, the size of the seal position for installing the skeleton oil seal 7 is processed from 80×100×10mm to 80×105×16mm, and two skeleton oil seals 7 with the size of 80×105×8mm are adopted as the seal structure, so that the sealing performance of the speed reducer is further improved, and the service life of the speed reducer is prolonged.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims (4)

1. An input end seal structure of speed reducer, its characterized in that: the speed reducer comprises a speed reducer box body, a first bearing, a second bearing, a bearing chamber, an input shaft, a framework oil seal, a first bearing seat, a second bearing seat and an input shaft end cover, wherein the input shaft is rotationally connected with the speed reducer box body through the first bearing and the second bearing, one end, connected with a gear set arranged in the speed reducer box body, of the input shaft is a bevel gear, the first bearing and the second bearing seat are respectively arranged on the first bearing seat and the second bearing seat, the first bearing seat is fixedly connected with the speed reducer box body, the second bearing seat is fixedly connected with the first bearing seat, the input shaft end cover is sleeved on the input shaft and fixedly connected with the second bearing seat, and the input shaft end cover is internally provided with the framework oil seal sleeved on the input shaft, and the bearing chamber between the first bearing seat and the framework oil seal is arranged in an inner cavity formed by the first bearing seat and the second bearing seat;

and an oil return hole which is communicated with the bearing chamber and the inner cavity of the speed reducer box body is formed in the first bearing seat.

2. The input end sealing structure of a speed reducer according to claim 1, wherein: the framework oil seal is a double-framework oil seal, and the double-framework oil seal comprises two framework oil seals with the diameters of 80, 105 and 8 mm.

3. The input end sealing structure of a speed reducer according to claim 1, wherein: the two oil return holes are symmetrically arranged on two sides of the input shaft.

4. The input end sealing structure of a speed reducer according to claim 1, wherein: the input shaft end cover is connected with the second bearing through a countersunk inner hexagon bolt.