Motor bearing sealing structure

Abstract

The utility model relates to the technical field of bearing sealing, in particular to a motor bearing sealing structure which comprises a bearing body, the bearing body is composed of an outer ring and an inner ring, a middle ring is movably connected between the outer ring and the inner ring, and a first sealing mechanism used for sealing the upper end face of the bearing body is arranged between the middle ring and the inner ring. A second sealing mechanism for sealing the lower end face of the bearing body is arranged at the lower end of the inner ring. The bearing body is composed of the outer ring and the inner ring, the middle ring which is concentrically distributed is arranged between the outer ring and the inner ring, and the middle ring and the outer ring are movably connected through the guide ring groove and the guide sliding block, so that the first rubber gasket makes up a gap between the middle ring and the outer ring under the stretching effect; the second rubber gasket is extruded, limited, locked and fixed by the limiting pad, and the extended second rubber gasket is used for compensating a gap between the middle ring and the inner ring, so that the lower end opening of the inner ring is sealed, and the sealing protection of the lower end surface of the bearing main body is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing seals, in particular to a motor bearing seal structure. Background Art

[0002] Bearings play a key role in motors. The lubricating oil of the motor sliding bearing bush is blocked by the edge of the bush seat, but the sealing effect is poor. Some of the lubricating oil still flows to the outside of the bush seat. The motor sliding bearing bush leaks oil seriously. When the motor is running, the oil flows from the shaft body to the bush seat, the motor base and the ground, which not only pollutes the environment, but also causes a lot of dust and sludge to accumulate inside the motor after oil and gas enters the motor.

[0003] In order to change the status quo under the existing conditions, a motor bearing sealing end cover disclosed in announcement number CN204493466U is adopted, which installs a felt washer on the outside of the bearing end cover and fixes the felt washer with an iron pad to seal the gap between the end cover and the shaft neck, making it difficult for dust to enter the bearing chamber. However, a detachable structure is adopted between the end cover and the bearing. Although it is convenient for maintenance and replacement, the independent end cover requires a large number of locking structures to achieve a tight connection with the bearing body, so as to ensure the effectiveness of the installation and use of the end cover. In addition, the external end cover is very likely to cause position interference with the shaft body installed on the bearing, affecting the shaft The stable installation and rotational movement of the body; another example is a new type of bearing sealing ring for a motor disclosed in announcement number CN201774353U, in which the outer edge of the outer portion has an outer lip, and a transition slope inclined toward the center portion is provided between one end of the outer lip and one end of the outer portion, and a side slope inclined toward the center portion is provided on the outer side of the outer lip, and the side slope is connected to the other end of the outer portion by an arc surface. However, it is extremely difficult to achieve position fixation using a single sealing ring because the sealing ring itself has a flexible structure. If the installation position and structure are fixed, it will be difficult for the sealing ring to achieve fitting and expansion and contraction changes, and it will be difficult to exert the sealing effect due to its own deformation. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that it is difficult to achieve sealing protection for the internal and external gaps of motor bearings, and to propose a motor bearing sealing structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A motor bearing sealing structure includes a bearing body, the bearing body consisting of an outer ring and an inner ring, with a middle ring movably connected between the outer ring and the inner ring, a first sealing mechanism for sealing the upper end face of the bearing body is provided between the middle ring and the inner ring, and a second sealing mechanism for sealing the lower end face of the bearing body is provided at the lower end of the inner ring.

[0007] Preferably, the outer ring, inner ring and middle ring are concentrically arranged, and the middle ring is located between the outer ring and the inner ring.

[0008] Preferably, a guide ring groove is provided on the inner wall of the outer ring, and four guide sliders equidistantly distributed circumferentially are slidably installed in the guide ring groove. The four guide sliders are fixedly connected to the outer wall of the middle ring. A limiting ring groove is provided on the inner wall of the middle ring corresponding to the outer wall of the inner ring, and six unobstructed balls equidistantly distributed circumferentially are movably fitted in the limiting ring groove.

[0009] Preferably, the first closing mechanism includes a driving assembly arranged at the upper end of the inner ring, and the first closing mechanism also includes a telescopic assembly arranged at the upper end of the middle ring and cooperating with the driving assembly to perform opening and closing adjustment. The number of the driving assemblies is one group, and the number of the telescopic assemblies is three groups distributed equidistantly in the circumferential direction.

[0010] Preferably, the drive assembly includes a guide vertical hole formed at the top end of the inner ring, a guide rod is slidably mounted in the guide vertical hole, a lower wedge surface pressure ring is integrally connected to the guide rod, and a first locking hole for mounting a locking bolt is formed in the lower wedge surface pressure ring;

[0011] The telescopic assembly includes a guide groove rail fixedly installed at the upper end surface of the middle ring, a strong spring fixedly installed in the guide groove rail, an upper wedge arc block fixedly connected to the strong spring and movably in contact with the lower wedge pressure ring, an outer wall surface of the upper wedge arc block is provided with an embedded arc groove, and a first rubber gasket is fixedly installed in the embedded arc groove.

[0012] Preferably, the lower end of the lower wedge surface pressure ring is inclined to open a lower inclined surface, the upper end of the upper wedge surface arc block is opened to open an upper inclined surface parallel to the lower inclined surface, and the upper wedge surface arc block is slidably installed on the guide groove rail.

[0013] Preferably, the second closing mechanism includes a concentric groove opened at the lower end of the inner ring, a second rubber gasket is embedded in the concentric groove, and a limiting washer that abuts the second rubber gasket is fixedly installed in the concentric groove, and a second locking hole for installing a locking bolt is opened in the limiting washer.

[0014] Preferably, the cross-section of the limiting pad is an L-shaped right-angle plate structure.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This utility model utilizes an outer ring and an inner ring to form the main bearing body, and a concentrically distributed middle ring is arranged between the outer ring and the inner ring. The middle ring and the outer ring are movably connected through a guide ring groove and a guide slider. At the same time, the middle ring and the inner ring are movably connected through a limit ring groove and unobstructed balls, thereby improving the flexibility between the structural components of the bearing itself.

[0017] 2. The utility model provides a first sealing mechanism between the inner ring and the middle ring, which facilitates the installation of a first rubber washer with structural telescopic function through the upper wedge arc block. The upper wedge arc block elastically pulled by a strong spring is pressurized by the movable lower wedge pressure ring, so that the first rubber washer fills the gap between the middle ring and the outer ring under the action of extension, thereby sealing the upper end of the bearing body.

[0018] 3. The utility model sets a second sealing mechanism at the lower end of the inner ring, uses a limiting pad to squeeze, limit and lock the second rubber gasket, and uses the stretched second rubber gasket to fill the gap between the middle ring and the inner ring to seal the lower end opening of the inner ring, thereby realizing sealing protection for the lower end surface of the bearing body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of a motor bearing sealing structure proposed by the present invention;

[0020] Figure 2 This is a bottom view of a motor bearing sealing structure proposed by the present invention;

[0021] Figure 3 This is a front cross-sectional view of a motor bearing sealing structure proposed by the present invention;

[0022] Figure 4 This is an enlarged schematic diagram of the structure of part A of a motor bearing sealing structure proposed by the present invention;

[0023] Figure 5 This is an enlarged schematic diagram of the structure of part B of a motor bearing sealing structure proposed by the present invention;

[0024] Figure 6 This is a bottom view schematic diagram of the main structure of a motor bearing sealing structure proposed by the present invention;

[0025] Figure 7 This is a cross-sectional diagram of a bearing body of a motor bearing sealing structure proposed by the present invention;

[0026] Figure 8 This is a schematic diagram of a first sealing mechanism of a motor bearing sealing structure proposed by the present invention;

[0027] Figure 9 This is a bottom view of the first sealing mechanism of the motor bearing sealing structure proposed by the present invention.

[0028] In the picture:

[0029] 1. Bearing body; 101. Outer ring; 102. Inner ring; 103. Guide ring groove; 104. Guide slider; 105. Middle ring; 106. Limit ring groove; 107. Unblocked ball bearing;

[0030] 2. The first closing mechanism;

[0031] 201, drive assembly; 20101, guide vertical hole; 20102, guide rod; 20103, lower wedge surface pressure ring; 20104, first locking hole;

[0032] 202, telescopic assembly; 20201, guide rail; 20202, strong spring; 20203, upper wedge arc block; 20204, embedded arc groove; 20205, first rubber gasket;

[0033] 3. Second closing mechanism; 301. Concentric groove; 302. Second rubber gasket; 303. Position limiting pad; 304. Second locking hole. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figures 1-9 A motor bearing sealing structure includes a bearing body 1, the bearing body 1 is composed of an outer ring 101 and an inner ring 102, and a middle ring 105 is movably connected between the outer ring 101 and the inner ring 102. Figure 6 With attached Figure 7 A guide ring groove 103 is provided on the inner wall of the outer ring 101, and four guide sliders 104 equidistantly distributed in the circumferential direction are slidably installed in the guide ring groove 103, so that the outer ring 101 and the middle ring 105 are movably connected, and the middle ring 105 can rotate in the outer ring 101. The four guide sliders 104 are fixedly connected to the outer wall of the middle ring 105, and a limiting ring groove 106 is provided on the inner wall of the middle ring 105 and the outer wall of the inner ring 102 at a position corresponding to the inner wall of the middle ring 105. Six unobstructed balls 107 equidistantly distributed in the circumferential direction are movably fitted in the limiting ring groove 106, so that the inner ring 102 and the middle ring 105 are movably connected, and the inner ring 102 can rotate in the middle ring 105.

[0036] By setting up a bearing body 1 composed of a three-layer structure and using a highly flexible inner ring 102 to install the shaft body, a higher degree of flexibility is provided to the shaft body. In particular, the use of a highly smooth limiting ring groove 106 and a non-obstructive ball 107 can reduce the friction resistance between the inner ring 102 and the middle ring 105 as much as possible.

[0037] A first sealing mechanism 2 for sealing the upper end face of the bearing body 1 is provided between the middle ring 105 and the inner ring 102. Figure 3 , Attachment Figure 4 , Attachment Figure 8 With attached Figure 9 The first closing mechanism 2 includes a driving assembly 201 arranged at the upper end of the inner ring 102, and the first closing mechanism 2 also includes a telescopic assembly 202 arranged at the upper end of the middle ring 105 and cooperating with the driving assembly 201 to perform opening and closing adjustment. The driving assembly 201 is in one group, and the telescopic assembly 202 is in three groups equidistantly distributed circumferentially. When the upper wedge arc blocks 20203 in the three groups of telescopic assemblies 202 are radially gathered, the radius value is small, so that the first rubber gasket 20205 can be fitted through the embedded arc groove 20204. When the upper wedge arc blocks 20203 in the three groups of telescopic assemblies 202 are radially expanded, the radius value is large, thereby stretching the first rubber gasket 20205 until it is in active contact with the inner wall of the outer ring 101.

[0038] First, the driving assembly 201 includes a guide vertical hole 20101 opened at the top position of the inner ring 102, and a guide rod 20102 is slidably sleeved in the guide vertical hole 20101. A lower wedge surface pressure ring 20103 is integrally connected to the guide rod 20102. A first locking hole 20104 for installing a locking bolt is opened in the lower wedge surface pressure ring 20103. The guide vertical hole 20101 guides and limits the guide rod 20102, so that the lower wedge surface pressure ring 20103 can perform linear reciprocating telescopic movement. The lower wedge surface pressure ring 20103 adopts a complete annular structure, so that a sufficient number of telescopic assemblies 202 can be set according to the specifications of the bearing body 1, ensuring that the lower wedge surface pressure ring 20103 can apply pressure to all upper wedge surface arc blocks 20203.

[0039] Secondly, the telescopic component 202 includes a guide groove 20201 fixedly installed on the upper end surface of the middle ring 105, and a strong spring 20202 is fixedly installed in the guide groove 20201. The strong spring 20202 is fixedly connected to an upper wedge arc block 20203 that is in active contact with the lower wedge pressure ring 20103. The outer wall of the upper wedge arc block 20203 is provided with an embedded arc groove 20204, and the embedded arc groove 20204 is fixedly provided with a first rubber gasket 20205. The strong spring 20202 adopts a tension spring, so that the three groups of upper wedge arc blocks 20203 maintain a radial convergence trend, and under the pressure and driving action of the lower wedge pressure ring 20103, the strong spring 20202 stretches, and the three groups of upper wedge arc blocks 20203 expand and move radially along the guide groove 20201, thereby expanding the first rubber gasket 20205.

[0040] The lower end of the inner ring 102 is provided with a second sealing mechanism 3 for sealing the lower end surface of the bearing body 1. Figure 3 With attached Figure 5 The second closing mechanism 3 includes a concentric groove 301 provided at the lower end of the inner ring 102, a second rubber gasket 302 is embedded in the concentric groove 301, and a limiting pad 303 is fixedly installed in the concentric groove 301 to abut against the second rubber gasket 302. The limiting pad 303 has an L-shaped right-angle plate structure in cross section, and a second locking hole 304 for installing a locking bolt is provided in the limiting pad 303. Under the pressure of the limiting pad 303, the second rubber gasket 302 stretches out from the concentric groove 301 to fill the gap between the inner ring 102 and the middle ring 105.

[0041] Please refer to the instruction manual for details Figure 7 The outer ring 101 , the inner ring 102 and the middle ring 105 are concentrically arranged, and the middle ring 105 is located between the outer ring 101 and the inner ring 102 , so that the bearing body 1 has a three-layer structure, further improving the flexibility of the inner ring 102 .

[0042] It is worth noting that the first rubber gasket 20205 and the second rubber gasket 302 are both made of frosted silicone material, which can ensure flexible sealing while also ensuring the wear resistance of their own structure.

[0043] The lower end of the lower wedge surface pressure ring 20103 is inclined and has a lower inclined surface, and the upper end of the upper wedge surface arc block 20203 is provided with an upper inclined surface parallel to the lower inclined surface, and the upper wedge surface arc block 20203 is slidably installed on the guide groove rail 20201. Under the pulling force of the strong spring 20202, the upper wedge surface arc block 20203 can movably support the lower wedge surface pressure ring 20103, and the lower wedge surface pressure ring 20103 can apply pressure to the upper wedge surface arc block 20203 when it extends toward one side of the guide vertical hole 20101.

[0044] It should be noted that the specific model and specifications of the bearing body 1 need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it is not repeated here.

[0045] The functional principle of this utility model can be explained through the following operation modes:

[0046] Under the pulling force of the strong spring 20202, the upper wedge arc blocks 20203 in the three telescopic components 202 move closer to each other, so that the first rubber gasket 20205 can be installed in the embedded arc groove 20204.

[0047] The lower wedge pressing ring 20103 is pressed downwardly in the guide vertical hole 20101. The lower wedge pressing ring 20103 applies pressure to the upper wedge arc block 20203, causing the upper wedge arc block 20203 in the three telescopic assemblies 202 to expand radially, thereby opening the first rubber washer 2205 and closing the gap between the outer ring 101 and the middle ring 105. The locking bolt is tightened through the first locking hole 20104 to fix the lower wedge pressing ring 20103 on the inner ring 102.

[0048] A second rubber washer 302 is inserted into the concentric groove 301 , and a limiting washer 303 is installed in the concentric groove 301 so that the stretched second rubber washer 302 fills the gap between the inner ring 102 and the middle ring 105 . The limiting washer 303 is fixed to the inner ring 102 by tightening the locking bolt in the second locking hole 304 .

[0049] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A motor bearing sealing structure, comprising a bearing body (1), characterized in that: The bearing body (1) is composed of an outer ring (101) and an inner ring (102), and a middle ring (105) is movably connected between the outer ring (101) and the inner ring (102). A first sealing mechanism (2) for sealing the upper end surface of the bearing body (1) is provided between the middle ring (105) and the inner ring (102), and a second sealing mechanism (3) for sealing the lower end surface of the bearing body (1) is provided at the lower end of the inner ring (102).

2. A motor bearing sealing structure according to claim 1, characterized in that: The outer ring (101), the inner ring (102) and the middle ring (105) are concentrically arranged, and the middle ring (105) is located between the outer ring (101) and the inner ring (102).

3. The motor bearing sealing structure according to claim 2, characterized in that: The inner wall of the outer ring (101) is provided with a guide ring groove (103), and four guide sliders (104) equidistantly distributed in the circumference are slidably installed in the guide ring groove (103). The four guide sliders (104) are fixedly connected to the outer wall of the middle ring (105). A limiting ring groove (106) is provided on the inner wall of the middle ring (105) at a position corresponding to the outer wall of the inner ring (102), and six unobstructed balls (107) equidistantly distributed in the circumference are movably mounted in the limiting ring groove (106).

4. The motor bearing sealing structure according to claim 1, characterized in that: The first closing mechanism (2) comprises a driving assembly (201) arranged at the upper end of the inner ring (102), and the first closing mechanism (2) further comprises a telescopic assembly (202) arranged at the upper end of the middle ring (105) and cooperating with the driving assembly (201) to perform opening and closing adjustment, wherein the driving assemblies (201) are provided in one group, and the telescopic assemblies (202) are provided in three groups equidistantly distributed in the circumferential direction.

5. The motor bearing sealing structure according to claim 4, characterized in that: The driving assembly (201) comprises a guide vertical hole (20101) provided at the top end of the inner ring (102), a guide rod (20102) being slidably mounted in the guide vertical hole (20101), a lower wedge surface pressure ring (20103) being integrally connected to the guide rod (20102), and a first locking hole (20104) for mounting a locking bolt being provided in the lower wedge surface pressure ring (20103); The telescopic assembly (202) includes a guide groove (20201) fixedly installed at the upper end surface of the middle ring (105), a strong spring (20202) fixedly installed in the guide groove (20201), an upper wedge arc block (20203) that movably contacts the lower wedge pressure ring (20103) is fixedly connected to the strong spring (20202), an embedded arc groove (20204) is provided on the outer wall of the upper wedge arc block (20203), and a first rubber gasket (20205) is fixedly installed in the embedded arc groove (20204).

6. The motor bearing sealing structure according to claim 5, characterized in that: The lower end of the lower wedge surface pressure ring (20103) is inclined to open a lower inclined surface, the upper end of the upper wedge surface arc block (20203) is opened to open an upper inclined surface parallel to the lower inclined surface, and the upper wedge surface arc block (20203) is slidably installed on the guide groove rail (2201).

7. The motor bearing sealing structure according to claim 1, characterized in that: The second closing mechanism (3) comprises a concentric groove (301) provided at the lower end of the inner ring (102), a second rubber gasket (302) being embedded in the concentric groove (301), and a limiting pad (303) abutting against the second rubber gasket (302) being fixedly installed in the concentric groove (301), and a second locking hole (304) for installing a locking bolt being provided in the limiting pad (303).

8. The motor bearing sealing structure according to claim 7, characterized in that: The cross section of the limiting pad (303) is an L-shaped right-angle plate structure.

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