A resiliently mounted reducer output shaft seal structure

Abstract

The application relates to the field of speed reducer sealing, in particular to a resiliently-installed speed reducer output shaft sealing structure. A coupling, an output gear shaft, a shaft seal ring, a check ring and a gland are sequentially arranged on the output shaft from front to back, the coupling is arranged close to the output shaft, gaps are left between the output gear shaft, the shaft seal ring, the check ring and the gland and the output shaft; a cavity is left between the front end of the shaft seal ring and the output shaft, an oil return channel is arranged on the shaft seal ring and communicates with the cavity and the front end of the shaft seal ring, the oil return channel is connected with the oil channel of the output gear shaft, an oil throwing ring is arranged in the cavity, the oil throwing ring is fixed on the output shaft of the speed reducer, the rear end of the shaft seal ring and the rear end of the check ring are both provided with a mounting ring groove, the mounting ring groove of the shaft seal ring and the front end of the check ring form a positioning interval one, the mounting ring groove of the check ring and the front end of the gland form a positioning interval two, circular rubber tubes are arranged in the positioning interval one and the positioning interval two and sleeved on the output shaft, and the application has good sealing effect.

Description

Technical Field

[0001] This invention relates to the field of reducer sealing, and more specifically to a resiliently mounted reducer output shaft sealing structure, particularly for an output shaft seal used when the output shaft axis floats during operation. Background Technology

[0002] To reduce the transmission of structural noise from the reducer to the mounting base during operation, the reducer is typically mounted flexibly. However, the equipment connected to the reducer's output shaft is rigidly mounted. The output shaft and the large output gear are connected at the front end using a drum-shaped tooth connection. The output shaft oscillates around the drum-shaped tooth as a fulcrum. There is a possibility of misalignment between the output shaft and the large output gear shaft. The issues of sealing to accommodate the floating output shaft and oil leakage due to poor sealing still need to be addressed. Summary of the Invention

[0003] Purpose of the invention: In order to solve the problems of poor sealing and oil leakage caused by the current reducer output shaft and output gear being connected by a drum-shaped tooth at the front end, with the output shaft swinging around the drum-shaped tooth as a fulcrum, the present invention provides a flexible sealing structure for the reducer output shaft.

[0004] The present invention is implemented through the following scheme: a resiliently mounted reducer output shaft sealing structure, which includes a shaft sealing ring, an oil slinger ring, an annular rubber tube, a retaining ring, a gland, an output shaft, an output large gear shaft, and a coupling;

[0005] The coupling, output gear shaft, shaft seal ring, retaining ring, and pressure cover are installed sequentially on the output shaft from front to back. The coupling is set close to the output shaft, and there is a gap between the output gear shaft, shaft seal ring, retaining ring, and pressure cover and the output shaft.

[0006] A cavity is left between the front end of the shaft seal ring and the output shaft. The shaft seal ring is provided with an oil return channel connecting the cavity and the front end of the shaft seal ring. The oil return channel is connected to the oil circuit of the output large gear shaft. An oil slinger ring is set in the cavity and fixed on the output shaft of the reducer. The rear end of the shaft seal ring and the rear end of the retaining ring are both provided with mounting ring grooves. The mounting ring groove of the shaft seal ring and the front end of the retaining ring form a positioning interval one. The mounting ring groove of the retaining ring and the front end of the pressure cap form a positioning interval two. A circular rubber tube fitted on the output shaft is provided in both positioning interval one and positioning interval two.

[0007] Furthermore, the coupling is connected to the output gear shaft by bolt one, the output gear shaft and the shaft seal ring are connected by bolt two, the shaft seal ring and the retaining ring are connected by bolt three, and the retaining ring and the gland are connected by bolt four.

[0008] Furthermore, the fourth bolt is fixed to the tail of the third bolt.

[0009] Furthermore, the outer diameter of the oil slinger ring is provided with an annular notch with an inverted trapezoidal cross-section, and the annular notch is positioned opposite the oil return channel.

[0010] Furthermore, the annular rubber tube is a hollow tube.

[0011] Furthermore, the output shaft is provided with a tapered hole, and the oil slinger ring is positioned on the output shaft by a set screw, which is tightened inside the tapered hole.

[0012] Beneficial effects:

[0013] This solution employs an elastic structure to compensate for misalignment between the output shaft and the large output gear shaft of the reducer. The solution uses a circular rubber tube for deformation compensation, enhancing sealing. The inner wall of the circular rubber tube remains tightly fitted to the output shaft, achieving the purpose of sealing the lubricating oil. An oil return channel is provided on the shaft seal ring, and an oil slinger ring is installed on the output shaft. The sealed lubricating oil is first thrown out through the oil slinger ring fixed on the output shaft. The thrown-out lubricating oil returns to the reducer through the oil return channel of the specially designed shaft seal ring for reuse. This solution provides a good sealing effect when the output shaft and the large output gear shaft are misaligned, solves the oil leakage problem, and allows for the collection and reuse of lubricating oil, thus possessing high utilization value. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of part A;

[0017] Figure 3 This is a schematic diagram of a shaft seal ring. Detailed Implementation

[0018] Combination Figure 1-3 The following describes the specific implementation method:

[0019] Specific implementation method 1: A flexible installation reducer output shaft sealing structure, which includes a shaft sealing ring 1, an oil slinger ring 2, an annular rubber tube 3, a retaining ring 4, a pressure cover 5, an output shaft 6, an output large gear shaft 7, and a coupling 8;

[0020] The coupling 8, the output large gear shaft 7, the shaft seal ring 1, the retaining ring 4, and the pressure cover 5 are installed on the output shaft 6 in sequence from front to back. The coupling 8 is set close to the output shaft 6, and there is a gap between the output large gear shaft 7, the shaft seal ring 1, the retaining ring 4, and the pressure cover 5 and the output shaft 6.

[0021] A cavity is left between the front end of the shaft seal ring 1 and the output shaft 6. The shaft seal ring 1 is provided with an oil return channel 1-1 that connects the cavity and the front end of the shaft seal ring 1. The oil return channel 1-1 is connected to the oil circuit of the output large gear shaft 7. The oil slinger ring 2 is set in the cavity and fixed on the output shaft 6 of the reducer. The rear end of the shaft seal ring 1 and the rear end of the retaining ring 4 are both provided with mounting ring grooves. The mounting ring groove of the shaft seal ring 1 and the front end of the retaining ring 4 form a positioning interval one. The mounting ring groove of the retaining ring 4 and the front end of the pressure cover 5 form a positioning interval two. A circular rubber tube 3 fitted on the output shaft 6 is provided in both positioning interval one and positioning interval two.

[0022] In this implementation:

[0023] When the unit is running, because the reducer is flexibly installed, the axis of the output large gear shaft changes, while the output shaft is rigidly installed. The output shaft rotates with the front-end drum gear coupling as the fulcrum, causing the output shaft and the output large gear shaft to be eccentric. The eccentricity is compensated by the deformation of the annular rubber tube.

[0024] When the lubricating oil of the lubricating drum gear coupling flows to the rear through the gap between the output large gear shaft and the output shaft, it is first thrown out radially by the oil slinger ring, and then thrown back into the reducer through the oil return channel of the shaft seal ring. Since the annular rubber tube is in contact with the output shaft, the blocked lubricating oil is also thrown back into the reducer through the inner hole of the shaft seal ring.

[0025] Specific implementation method two: An output shaft sealing structure for a flexible mounting reducer, wherein the coupling 8 is connected to the output large gear shaft 7 by bolt 1 9, the output large gear shaft 7 is connected to the shaft seal ring 1 by bolt 2 10, the shaft seal ring 1 is connected to the retaining ring 4 by bolt 3 11, and the retaining ring 4 is connected to the pressure cover 5 by bolt 4 12.

[0026] In this embodiment: the above connection method meets the connection strength requirements.

[0027] Other implementation methods are the same as those in Specific Implementation Method 1.

[0028] Specific implementation method three: an output shaft sealing structure for a flexible mounting reducer, wherein bolt four 12 is fixed to the tail of bolt three 11.

[0029] Other implementation methods are the same as those in Specific Implementation Method Two.

[0030] Specific implementation method four: An output shaft sealing structure for a flexible mounting reducer, wherein the outer diameter of the oil slinger ring 2 is provided with an annular notch with an inverted trapezoidal cross section, and the annular notch is positioned opposite the oil return channel.

[0031] In this embodiment, the oil slinger ring is set up in such a way that when slinging lubricating oil, it is first collected through the annular notch, resulting in higher oil slinging efficiency and slinging the lubricating oil into the return oil channel as much as possible.

[0032] Other implementation methods are the same as those in Specific Implementation Method 1.

[0033] Specific Implementation Method 5: An output shaft sealing structure for a flexible mounting reducer, wherein the annular rubber tube 3 is a hollow tube.

[0034] In this embodiment: the hollow structure of the annular rubber tube is utilized, and pre-compression installation is adopted to match the deformation of the annular rubber tube cavity with the eccentricity of the shaft, so that the inner wall of the annular rubber tube is always in close contact with the output shaft, thereby achieving the purpose of sealing the lubricating oil.

[0035] Other implementation methods are the same as those in Specific Implementation Method 1.

[0036] Specific implementation method six: An output shaft sealing structure for a flexible mounting reducer, wherein the output shaft 6 is provided with a tapered hole, and the oil slinger ring 2 is positioned on the output shaft 6 by a set screw 13, and the set screw 13 is pressed against the tapered hole.

[0037] In this embodiment, a tapered hole is provided on the output shaft, which can improve the positioning effect of the set screw while ensuring the strength of the output shaft.

[0038] Other implementation methods are the same as those in Specific Implementation Method 1.

[0039] Working principle:

[0040] When the unit is running, because the reducer is flexibly installed, the axis of the output large gear shaft changes, while the output shaft is rigidly installed. The output shaft rotates with the front-end drum gear coupling as the fulcrum, causing the output shaft and the output large gear shaft to be eccentric. An elastic structure is used to compensate for this. This solution uses a circular rubber tube to compensate for deformation and enhance the sealing performance.

[0041] Regarding the handling of lubricating oil leakage in the reducer, recycling and reuse should be carried out as much as possible. An oil return channel is set on the shaft seal ring, and an oil slinger ring is installed on the output shaft. The sealed lubricating oil is first thrown out through the oil slinger ring fixed on the output shaft, and the thrown-out lubricating oil returns to the reducer through the oil return channel of the specially designed shaft seal ring for reuse.

Claims

1. A resiliently mounted reducer output shaft seal structure, characterized by: It includes a shaft seal ring (1), an oil slinger ring (2), a circular rubber tube (3), a retaining ring (4), a gland (5), an output shaft (6), an output large gear shaft (7), and a coupling (8); The coupling (8), the output large gear shaft (7), the shaft seal ring (1), the retaining ring (4) and the pressure cover (5) are installed on the output shaft (6) from front to back. The coupling (8) is set close to the output shaft (6), and there is a gap between the output large gear shaft (7), the shaft seal ring (1), the retaining ring (4) and the pressure cover (5) and the output shaft (6). A cavity is left between the front end of the shaft seal ring (1) and the output shaft (6). The shaft seal ring (1) is provided with an oil return channel (1-1) connecting the cavity and the front end of the shaft seal ring (1). The oil return channel (1-1) is connected to the oil circuit of the output large gear shaft (7). The oil slinger ring (2) is set in the cavity and fixed on the output shaft (6) of the reducer. The rear end of the shaft seal ring (1) and the rear end of the retaining ring (4) are both provided with mounting ring grooves. The mounting ring groove of the shaft seal ring (1) and the front end of the retaining ring (4) form a positioning interval one. The mounting ring groove of the retaining ring (4) and the front end of the pressure cap (5) form a positioning interval two. Both positioning interval one and positioning interval two are provided with annular rubber tubes (3) fitted on the output shaft (6).

2. The elastically mounted reducer output shaft sealing structure according to claim 1, characterized in that: The coupling (8) is connected to the output large gear shaft (7) by bolt one (9), the output large gear shaft (7) and the shaft seal ring (1) are connected by bolt two (10), the shaft seal ring (1) and the retaining ring (4) are connected by bolt three (11), and the retaining ring (4) and the pressure plate (5) are connected by bolt four (12).

3. The elastically mounted reducer output shaft sealing structure according to claim 2, characterized in that: Bolt four (12) is fixed to the tail of bolt three (11).

4. The elastically mounted reducer output shaft sealing structure according to claim 1, characterized in that: The oil slinger ring (2) has an annular notch with an inverted trapezoidal cross-section at its outer diameter, and the annular notch is positioned opposite the oil return channel (1-1).

5. The elastically mounted reducer output shaft sealing structure according to claim 1, characterized in that: The annular rubber tube (3) is a hollow tube.

6. The elastically mounted reducer output shaft sealing structure according to claim 1, characterized in that: The output shaft (6) is provided with a tapered hole, and the oil slinger ring (2) is positioned on the output shaft (6) by a set screw (13), which is pressed against the tapered hole.

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