Driving shaft sealing structure

Abstract

The utility model discloses a driving shaft sealing structure which comprises a motor, a driving shaft and a driving bearing seat, and is characterized in that a fixed disc is fixedly arranged on the end face of the output end of the motor, the driving bearing seat is fixedly connected with the fixed disc through bolts, a plurality of rotating grooves are formed in the inner wall of the driving bearing seat, and the rotating grooves are arranged in a step shape; a threaded groove is formed in the side wall of the driving bearing seat and communicates with the rotating groove close to one end of the motor, the threaded groove is in threaded connection with a pagoda connector, the pagoda connector is connected with an external air pump, and air channels are formed between the rotating grooves in a communicating mode; air of an air pump is transmitted into the rotating groove in the driving bearing seat through the pagoda joint, flows in the rotating groove through the air channel and is finally exhausted from the tail end, connected with the driving bearing seat, of the driving shaft, so that the pressure intensity of the interior, connected with the driving bearing seat, of the driving shaft is always higher than that of the exterior, and water permeation is avoided; and a good sealing effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drive shafts, in particular to a drive shaft sealing structure. Background Art

[0002] The drive shaft refers to the shaft that receives power from the engine or motor and transmits it to other parts. The drive shaft is generally connected to the output shaft of the engine or motor through a keyway. A drive bearing seat is provided on the outside of the drive shaft through a bearing rotating sleeve. The drive bearing seat is usually provided with a mounting hole, and the drive bearing seat is installed and fixed through the mounting hole.

[0003] Since the drive bearing seat and the drive shaft are rotationally connected, there is a gap between the drive shaft and the drive bearing seat, which makes it easy for dust or moisture to enter, causing the lubricating oil in the internal bearing to melt and be diluted when it comes into contact with water, thereby reducing the lubrication function and increasing the loss of the drive shaft. Utility Model Content

[0004] The purpose of the utility model is to provide a driving shaft sealing structure to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a driving shaft sealing structure, comprising a motor, a driving shaft connected to the output shaft of the motor, and a driving bearing seat rotatably connected through an angular contact ball bearing, a fixed disk is fixedly provided on the end face of the output end of the motor, the driving bearing seat is fastened to the fixed disk by bolts, a plurality of rotating grooves are provided on the inner wall of the driving bearing seat, the rotating grooves are arranged in a stepped shape, a plurality of rotating rings rotatably connected to the rotating grooves are provided on the outer wall of the driving shaft and corresponding to the fixing rings on the inner walls of each rotating groove, a threaded groove is provided on the side wall of the driving bearing seat and is connected to the rotating groove near one end of the motor, a pagoda joint is threadedly connected to the threaded groove, the pagoda joint is connected to an external air pump, and air ducts are provided between the rotating grooves.

[0006] Preferably, the outer wall fixing ring of the driving bearing seat is provided with a mounting ring, and the mounting ring is provided with a plurality of mounting holes for fixing the driving bearing seat.

[0007] Preferably, a retaining ring is fixedly provided on the inner wall of one end of each rotating groove away from the motor, and the inner wall of each retaining ring is in contact with the outer wall of the corresponding rotating ring.

[0008] Preferably, a water retaining groove is provided on the outer wall of each rotating ring, and a plurality of the water retaining grooves are evenly arranged along the axial direction of the driving shaft. The water retaining grooves are inclined away from the inner wall of the motor and are inclined downward toward the motor.

[0009] Preferably, a plurality of annular grooves are evenly formed from the outside to the inside at one end of the fixed disk that fits the driving bearing seat, and a convex ring for embedding in the annular groove is fixedly provided at one end of the driving bearing seat that contacts the fixed disk.

[0010] Preferably, a sealing gasket is provided at one end of the fixed plate that is in contact with the driving bearing seat, and a sealing gasket is provided at one end of the pagoda head that is in contact with the outer wall of the driving bearing seat.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: through the arrangement of the rotating groove, rotating ring, threaded groove, airway, water retaining groove and retaining ring, the gas enters the rotating groove from the pagoda joint and circulates through the airway to fill each rotating groove, and finally the air flows out from the gap at the fitting place of the retaining ring and the rotating ring away from the motor. The air flow rate flowing in from the pagoda joint is greater than the air flow rate flowing out from the gap at the fitting place of the retaining ring and the rotating ring, thereby ensuring that the internal pressure of the connection between the driving bearing seat and the driving shaft is greater than the external pressure, thereby achieving a sealing effect and preventing water from infiltrating. If water infiltrates from the gap between the rotating ring and the retaining ring, it will be blocked by the water retaining groove, thereby achieving a waterproof effect. The inclined inner wall of the water retaining groove can facilitate the gas to flow in the direction away from the motor end and take away the moisture in the water retaining groove, thereby preventing water from infiltrating into the interior of the rotational connection between the driving bearing seat and the driving shaft; the arrangement of the mounting ring and the mounting hole facilitates the fixing of the driving bearing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 This is a schematic diagram of the main appearance of this embodiment;

[0014] Figure 2 is a schematic diagram of the side appearance of this embodiment;

[0015] Figure 3 This is a disassembled view of the drive shaft and the drive bearing seat of this embodiment;

[0016] Figure 4 is a front cross-sectional view of this embodiment;

[0017] Figure 5 Schematic diagram of the drive shaft of this embodiment.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Motor; 2. Drive shaft; 3. Angular contact ball bearing; 4. Drive bearing seat; 5. Mounting ring; 6. Mounting hole; 7. Fixed plate; 8. Rotating groove; 9. Thread groove; 10. Pagoda joint; 11. Air duct; 12. Retaining ring; 13. Rotating ring; 14. Water retaining groove; 15. Ring groove; 16. Convex ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-5 The utility model provides a technical solution: a driving shaft sealing structure, including a motor 1, a driving shaft 2 connected to the output shaft of the motor 1 and a driving bearing seat 4 rotatably connected through an angular contact ball bearing 3, a fixed disk 7 is fixedly provided on the end surface of the output end of the motor 1, the driving bearing seat 4 is fastened to the fixed disk 7 by bolts, a plurality of rotating grooves 8 are provided on the inner wall of the driving bearing seat 4, the rotating grooves 8 are arranged in a stepped shape, a plurality of rotating rings 13 rotatably connected to the rotating grooves 8 are provided on the outer wall of the driving shaft 2 and corresponding fixing rings on the inner walls of each rotating groove 8, a threaded groove 9 is provided on the side wall of the driving bearing seat 4 and is connected to the rotating groove 8 near one end of the motor 1, a pagoda joint 10 is threadedly connected to the threaded groove 9, the pagoda joint 10 is connected to an external air pump, and an airway 11 is provided between each rotating groove 8.

[0022] Specifically, a mounting ring 5 is provided on the outer wall fixing ring of the driving bearing seat 4 , and a plurality of mounting holes 6 for fixing the driving bearing seat 4 are opened on the mounting ring 5 . The driving bearing seat 4 can be fixed through the mounting holes 6 on the mounting ring 5 .

[0023] Specifically, a retaining ring 12 is fixedly provided on the inner wall of each rotating groove 8 at one end away from the motor 1, and the inner wall of each retaining ring 12 is in contact with the outer wall of the corresponding rotating ring 13. The retaining ring 12 can block water, and the space between the retaining ring 12 and the inner wall of the rotating groove 8 is conducive to air flow, and finally the air flows out from the gap at the fitting place of the retaining ring 12 and the rotating ring 13. The air flow rate flowing in from the pagoda joint 10 is greater than the air flow rate flowing out from the gap at the fitting place of the retaining ring 12 and the rotating ring 13, thereby ensuring that the internal pressure of the connection between the driving bearing seat 4 and the driving shaft 2 is greater than the external pressure, thereby achieving a better sealing effect and preventing water from seeping in.

[0024] Specifically, a water retaining groove 14 is provided on the outer wall of each rotating ring 13, and a plurality of water retaining grooves 14 are evenly arranged along the axial direction of the driving shaft 2. The inner wall of the water retaining groove 14 is inclined away from the motor 1 and inclined downward in the direction of the motor 1. The water retaining groove 14 can improve the waterproof effect. If water penetrates from the gap between the rotating ring 13 and the retaining ring 12, it will be blocked by the water retaining groove 14, thereby achieving a waterproof effect. The inclined inner wall of the water retaining groove 14 can facilitate the gas to flow away from the motor 1 end and take away the moisture in the water retaining groove 14.

[0025] Specifically, a plurality of annular grooves 15 are evenly arranged from the outside to the inside at one end of the fixed disk 7 that fits with the driving bearing seat 4, and a convex ring 16 for embedding in the annular groove 15 is fixedly arranged at one end of the driving bearing seat 4 that contacts with the fixed disk 7. The setting of the convex ring 16 and the annular groove 15 improves the sealing effect between the fixed disk 7 and the driving bearing seat 4.

[0026] Specifically, a sealing gasket is provided at one end where the fixed plate 7 is in contact with the driving bearing seat 4 to improve the sealing effect between the fixed plate 7 and the driving bearing seat 4. A sealing gasket is provided at one end where the pagoda head 10 is against the outer wall of the driving bearing seat 4 to improve the sealing performance of the connection between the pagoda head 10 and the driving bearing seat 4 to prevent water from seeping in from the threaded groove 9.

[0027] A specific application example of this embodiment is:

[0028] When the device is in use, it can be fixedly installed by bolts through the mounting holes 6 on the mounting ring 5, and the pagoda joint 10 can be connected to the external air source. The gas enters the rotating groove 8 from the pagoda joint 10 and circulates through the air duct 11 to fill each rotating groove 8, and finally the air flows out from the gap at the joint of the retaining ring 12 and the rotating ring 13 away from the motor 1. The air flow rate flowing in from the pagoda joint 10 is greater than the air flow rate flowing out from the gap at the joint of the retaining ring 12 and the rotating ring 13, thereby ensuring that the internal pressure of the connection between the driving bearing seat 4 and the driving shaft 2 is greater than the external pressure, thereby achieving a sealing effect and preventing water from infiltrating. If water infiltrates from the gap between the rotating ring 13 and the retaining ring 12, it will be blocked by the water retaining groove 14, thereby achieving a waterproof effect. The inclined inner wall of the water retaining groove 14 is conducive to the gas flowing in the direction away from the motor 1 end and taking away the moisture in the water retaining groove 14, thereby preventing water from infiltrating into the interior of the driving bearing seat 4 and the driving shaft 2 rotatably connected.

[0029] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that modifications may be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drive shaft sealing structure, comprising a motor (1), a drive shaft (2) connected to an output shaft of the motor (1), and a drive bearing seat (4) rotatably connected via an angular contact ball bearing (3), characterized in that: A fixing plate (7) is fixedly provided on the output end surface of the motor (1), the driving bearing seat (4) is fastened to the fixing plate (7) by bolts, a plurality of rotating grooves (8) are provided on the inner wall of the driving bearing seat (4), and the rotating grooves (8) are arranged in a stepped shape, a plurality of rotating rings (13) are provided on the outer wall of the driving shaft (2) and corresponding fixing rings on the inner wall of each rotating groove (8) and are rotatably connected to the rotating groove (8), a threaded groove (9) is provided on the side wall of the driving bearing seat (4) and is connected to the rotating groove (8) near one end of the motor (1), a pagoda joint (10) is threadedly connected to the threaded groove (9), and the pagoda joint (10) is connected to an external air pump, and an air passage (11) is provided between each rotating groove (8).

2. A driving shaft sealing structure according to claim 1, characterized in that: The outer wall fixing ring of the driving bearing seat (4) is provided with a mounting ring (5), and the mounting ring (5) is provided with a plurality of mounting holes (6) for fixing the driving bearing seat (4).

3. A driving shaft sealing structure according to claim 1, characterized in that: A retaining ring (12) is fixedly provided on the inner wall of one end of each rotating groove (8) away from the motor (1), and the inner wall of each retaining ring (12) is in contact with the outer wall of the corresponding rotating ring (13).

4. A driving shaft sealing structure according to claim 1, characterized in that: A water retaining groove (14) is formed on the outer wall of each rotating ring (13), and a plurality of the water retaining grooves (14) are evenly arranged along the axial direction of the driving shaft (2). The water retaining grooves (14) are arranged at an angle away from the inner wall of the motor (1) and are inclined downward in the direction of the motor (1).

5. A driving shaft sealing structure according to claim 1, characterized in that: The end of the fixed disk (7) that fits the driving bearing seat (4) is provided with a plurality of annular grooves (15) evenly spaced from the outside to the inside, and the end of the driving bearing seat (4) that contacts the fixed disk (7) is fixedly provided with a convex ring (16) for embedding in the annular groove (15).

6. A driving shaft sealing structure according to claim 5, characterized in that: A sealing gasket is provided at one end of the fixed plate (7) that contacts the driving bearing seat (4), and a sealing gasket is provided at one end of the pagoda joint (10) that contacts the outer wall of the driving bearing seat (4).

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