Sealing device for RV speed reducer

Abstract

The utility model relates to the technical field of speed reducers, in particular to a sealing device used for an RV speed reducer, which comprises a pin wheel housing, a sealing pressing plate connected through a screw is arranged on one side of the pin wheel housing, an output hole used for installing an output shaft is arranged in the sealing pressing plate, an oil seal is arranged in the output hole, and the oil seal is connected with the pin wheel housing through the screw. A sealing assembly is arranged between the pin wheel housing and the sealing pressing plate. The sealing assembly comprises a sealing coil installed on the surface of the pin wheel housing, an oil sealing plate is arranged on one side of the sealing coil, a pressing plate is fixedly arranged outside the oil sealing plate, a blocking groove is formed between the pressing plate and the oil sealing plate, and four sets of heat conduction columns are vertically fixed to the top of the pressing plate. The heat conduction columns are evenly distributed along the surface of the pressing plate at equal intervals, a liquid injection hole is formed in one side of the oil seal plate, and the interior of the oil seal plate is of a hollow structure. According to the RV speed reducer, the sealing effect of the RV speed reducer can be improved by conducting multi-stage sealing on the output shaft and the pin wheel housing.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a sealing device for an RV reducer. Background Art

[0002] RV reducer, also known as rotary vector reducer, is a transmission mechanism that is usually composed of spur gears (planetary gears), RV gears, crankshaft, pins (pin pins), housing (pin wheel), output shaft, etc. It uses the principle of planetary gear transmission to achieve reduction transmission through the rotation of the planetary gears.

[0003] During the operation of the RV reducer, it is necessary to prevent the leakage of internal lubricating oil and the intrusion of external impurities in order to maintain its good lubrication state and working environment. Therefore, a sealing device will be used to seal the RV reducer.

[0004] In the current RV reducer, only a skeleton oil seal is used to seal between the output shaft and the pinion housing. Once the skeleton oil seal is damaged due to wear, the sealing effect will be affected and the effect is general. Summary of the Invention

[0005] The purpose of the present utility model is to provide a sealing device for an RV reducer, which can improve the sealing effect of the RV reducer by performing multi-stage sealing between the output shaft and the pinion housing, so as to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a sealing device for an RV reducer, comprising a pinion housing, a sealing pressure plate connected by screws provided on one side of the pinion housing, an output hole for mounting an output shaft provided inside the sealing pressure plate, an oil seal provided inside the output hole, and a sealing assembly provided between the pinion housing and the sealing pressure plate;

[0007] The sealing assembly includes a sealing coil installed on the surface of the pin gear housing, an oil sealing plate is provided on one side of the sealing coil, and a pressing plate is fixedly provided on the outside of the oil sealing plate, and a blocking groove is formed between the pressing plate and the oil sealing plate.

[0008] Preferably, four groups of heat-conducting columns are vertically fixed to the top of the pressing plate, and the heat-conducting columns are evenly distributed at equal distances along the surface of the pressing plate.

[0009] Preferably, a liquid injection hole is provided on one side of the oil sealing plate, and the interior of the oil sealing plate is a hollow structure.

[0010] Preferably, the heat-conducting column passes through the bottom of the sealing coil, and a positioning hole adapted for the heat-conducting column is provided at the bottom of the sealing coil.

[0011] Preferably, a sealing groove is provided at the connection between the sealing coil and the pin tooth housing, and a mounting groove is provided on the inner wall of the sealing coil.

[0012] Preferably, a mounting protrusion adapted to the mounting groove is provided at the connection between the mounting groove and the needle tooth housing.

[0013] Preferably, the outer diameter of the sealing coil is smaller than the outer diameter of the pressing plate, and the pressing plate abuts against the sealing coil.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Through the provided sealing components, the oil seal plate, the pressure plate and the sealing coil, multiple sealing of the pin gear housing is achieved to improve the sealing effect. In addition, coolant can be injected into the oil seal plate, which not only positions the sealing coil through the heat-conducting column, but also has a certain heat dissipation effect on the sealing coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is the overall structural view of the utility model;

[0018] Figure 2 This is a structural diagram of the needle gear housing and the sealing pressure plate of the present invention when they are separated;

[0019] Figure 3 is a schematic diagram of the sealing assembly of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the heat-conducting column of the utility model.

[0021] Description of reference numerals:

[0022] 1. Needle gear housing; 2. Sealing pressure plate; 3. Output hole; 4. Sealing groove; 5. Sealing assembly; 501. Oil seal plate; 502. Sealing coil; 503. Barrier groove; 504. Pressing plate; 505. Mounting groove; 506. Liquid injection hole; 507. Thermal column. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The utility model provides a technical solution:

[0025] See also Figures 1 to 4 A sealing device for an RV reducer includes a pinion housing 1, a sealing pressure plate 2 connected by screws is provided on one side of the pinion housing 1, an output hole 3 for mounting an output shaft is opened inside the sealing pressure plate 2, an oil seal is provided inside the output hole 3, and a sealing assembly 5 is provided between the pinion housing 1 and the sealing pressure plate 2;

[0026] The sealing assembly 5 includes a sealing coil 502 mounted on the surface of the pin gear housing 1. An oil sealing plate 501 is provided on one side of the sealing coil 502. A pressing plate 504 is fixedly provided on the outside of the oil sealing plate 501. A blocking groove 503 is formed between the pressing plate 504 and the oil sealing plate 501.

[0027] A sealing groove 4 is provided at the connection between the sealing coil 502 and the needle tooth housing 1, and a mounting groove 505 is provided on the inner wall of the sealing coil 502. A mounting protrusion matching the mounting groove 505 is provided at the connection between the mounting groove 505 and the needle tooth housing 1. The outer diameter of the sealing coil 502 is smaller than the outer diameter of the clamping plate 504, and the clamping plate 504 is in contact with the sealing coil 502.

[0028] By adopting the above technical solution, the pin gear housing 1 is provided with planetary gears, RV gears, crankshafts, pin gear pins and other components, a sealing coil 502 is installed on one side of the output end, the sealing coil 502 is stuck in the sealing groove 4, and the sealing coil 502 is limited by the mounting protrusion and the mounting groove 505, and the sealing coil 502 is pressed so that the sealing coil 502 is surrounded by the outside of the output disk to achieve a sealing effect, and then the oil seal plate 501 is installed on the surface of the sealing coil 502, and the oil seal plate 501 is pressed so that the sealing coil 502 and the pressure plate 501 are sealed. The tightening plate 504 is tightly attached, and a step is formed between the pressing plate 504 and the sealing coil 502. The pressing plate 504 cooperates to achieve secondary sealing. The lubricating oil can only flow out from the through hole in the middle of the pressing plate 504. At the same time, since a blocking groove 503 is provided on the outside of the pressing plate 504, the lubricating oil is blocked again. Even if the sealing effect between the sealing coil 502 and the pressing plate 504 is reduced, it will be sealed by the blocking groove 503. The outside of the oil seal plate 501 is fixed again by the sealing pressure plate 2, and an oil seal is installed inside the sealing pressure plate 2 to seal the output shaft position.

[0029] Specifically, such as Figure 4 As shown, four groups of heat-conducting columns 507 are vertically fixed on the top of the pressing plate 504, and the heat-conducting columns 507 are evenly distributed along the surface of the pressing plate 504. A liquid injection hole 506 is provided on one side of the oil sealing plate 501, and the interior of the oil sealing plate 501 is a hollow structure. The heat-conducting columns 507 pass through the bottom of the sealing coil 502, and a positioning hole compatible with the heat-conducting columns 507 is provided at the bottom of the sealing coil 502.

[0030] By adopting the above technical solution, the coolant is injected into the interior of the oil seal plate 501 through the injection hole 506 and fills into the hollow inner cavity of the oil seal plate 501. The injection hole 506 is blocked by a plug. The heat on the sealing coil 502 can be transferred to the heat-conducting column 507 through the positioning hole, and then transferred to the oil seal plate 501 through the heat-conducting column 507, thereby achieving a cooling effect.

[0031] The sealing coil 502 is fixed to the outside of the output disk by the mounting protrusion and the mounting groove 505, and the sealing coil 502 is pressed so that the sealing coil 502 surrounds the outside of the output disk to achieve a sealing effect. Then the oil seal plate 501 is installed on the surface of the sealing coil 502 and the oil seal plate 501 is pressed so that the sealing coil 502 is in close contact with the pressing plate 504, and a step is formed between the pressing plate 504 and the sealing coil 502. The pressing plate 504 cooperates to achieve secondary sealing, and the lubricating oil can only flow out from the through hole in the middle of the pressing plate 504. At the same time, since the outside of the pressing plate 504 is provided with a blocking groove 503, the lubricating oil is blocked again. Even if the sealing effect of the sealing coil 502 and the pressing plate 504 is reduced, it will be sealed by the blocking groove 503. The outside of the oil seal plate 501 is fixed again by the sealing pressure plate 2, and an oil seal is installed inside the sealing pressure plate 2 to seal the output shaft position.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing device for an RV reducer, comprising a pinion housing (1), characterized in that: A sealing pressure plate (2) connected by screws is provided on one side of the needle gear housing (1), and an output hole (3) for mounting an output shaft is provided inside the sealing pressure plate (2), an oil seal is provided inside the output hole (3), and a sealing assembly (5) is provided between the needle gear housing (1) and the sealing pressure plate (2); The sealing assembly (5) comprises a sealing coil (502) mounted on the surface of the pinion housing (1); an oil sealing plate (501) is provided on one side of the sealing coil (502); a pressing plate (504) is fixedly provided on the outside of the oil sealing plate (501); and a blocking groove (503) is formed between the pressing plate (504) and the oil sealing plate (501).

2. A sealing device for an RV reducer according to claim 1, characterized in that: Four groups of heat-conducting columns (507) are vertically fixed to the top of the pressing plate (504), and the heat-conducting columns (507) are evenly distributed at equal distances along the surface of the pressing plate (504).

3. A sealing device for an RV reducer according to claim 2, characterized in that: A liquid injection hole (506) is provided on one side of the oil sealing plate (501), and the interior of the oil sealing plate (501) is a hollow structure.

4. The sealing device for an RV reducer according to claim 2, characterized in that: The heat-conducting column (507) passes through the bottom of the sealing coil (502), and a positioning hole adapted to the heat-conducting column (507) is provided at the bottom of the sealing coil (502).

5. The sealing device for an RV reducer according to claim 1, characterized in that: A sealing groove (4) is provided at the connection between the sealing coil (502) and the needle tooth housing (1), and a mounting groove (505) is provided on the inner wall of the sealing coil (502).

6. The sealing device for an RV reducer according to claim 5, characterized in that: A mounting protrusion that matches the mounting groove (505) is provided at the connection between the mounting groove (505) and the needle tooth housing (1).

7. The sealing device for an RV reducer according to claim 5, characterized in that: The outer diameter of the sealing coil (502) is smaller than the outer diameter of the pressing plate (504), and the pressing plate (504) abuts against the sealing coil (502).

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