Double-layer sealing structure of slewing bearing

Abstract

The utility model discloses a double-layer sealing structure of a slewing bearing, and belongs to the technical field of industrial devices. The slewing bearing comprises a slewing bearing body, the slewing bearing body is provided with an outer rotating ring, a sealing groove is formed in the outer rotating ring, a double-layer sealing part is arranged in the sealing groove in a matched mode, the double-layer sealing part is provided with a sealing plug and a sealing gasket, the sealing gasket is connected to the bottom of the sealing plug in a sleeved mode, and a sealing ring groove matched with the sealing gasket is formed in the outer rotating ring. The sealing ring groove communicates with the sealing groove, a columnar groove is formed in the outer rotating ring, and a column is arranged in the columnar groove in a sliding fit mode. According to the utility model, the double-layer sealing part is fixed through the arranged column body and the limiting opening, so that the double-layer sealing part is mounted, rotation operation is not needed, the operation complexity is reduced, and the problem of thread abrasion or sealing gasket aging caused by long-term screwing is avoided; therefore, the device can absorb radial runout and thermal expansion of the slewing bearing body.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial device technical field, concretely is a slewing bearing double -layer sealing structure. BACKGROUND

[0002] Slewing bearing is also called rotary bearing, slewing bearing is widely used in reality industry, is the important transmission component that two objects between need relative slewing motion, need simultaneously bear axial force, radial force, tilting moment again of mechanical, China has authorized patent (announcement number: CN202121372178.0) discloses a kind of anti broken tooth type slewing bearing, including outer race, sealing plug and sealing pad etc., the device is sealed to the sealing groove double layer of injection lubricating oil by sealing plug and sealing pad.

[0003] The double-layer sealing structure of the slewing bearing in the prior art has the problems that, since the sealing plug in the device is connected in the mounting groove by screwing, special tools need to be used for assistance during connection, and long-term screwing causes thread wear or sealing pad aging, which reduces the pre-tightening force and easily causes lubricating oil leakage. UTILITY MODEL CONTENTS

[0004] The utility model discloses a slewing bearing double-layer sealing structure, and the double-layer sealing part is fixed through the column and the limiting opening, so that the problem of thread wear caused by screwing connection is solved.

[0005] The utility model is realized through the following technical schemes:

[0006] The utility model discloses a slewing bearing double-layer sealing structure, including slewing bearing body, slewing bearing body has outer race, is set with sealing groove on the outer race, and the double-layer sealing part is matched in the sealing groove, and the double-layer sealing part has sealing plug and sealing pad, and the sealing pad is connected at the bottom of sealing plug, and the sealing ring groove that is matched with sealing pad is set up in the outer race, and the sealing ring groove is communicated with sealing groove, and the cylindrical groove is set up in the outer race, and the column is slidably matched in the cylindrical groove, and the limiting opening that is matched with column is set up on the sealing plug, and the spring is connected between the inner side wall of cylindrical groove and the outer surface of column.

[0007] Further, the top of the sealing plug is provided with a flange, and the flange is located at the top of the sealing groove.

[0008] Further, a plurality of protrusions are formed on both sides of the sealing plug, and a circular groove matched with the protrusions is formed in the outer race, and the circular groove is communicated with the sealing groove.

[0009] Further, a vertical rod is connected to the column, and a sliding groove matched with the vertical rod is formed in the outer race, and the sliding groove is communicated with the cylindrical groove.

[0010] Further, a neodymium magnet is embedded in the bottom end of the sealing plug, and a convex edge matched with the neodymium magnet is formed in the outer race.

[0011] Further, the outer rotating ring is internally provided with an oil storage groove, the oil storage groove is communicated with the sealing groove, and the sealing plug is located at the top of the oil storage groove.

[0012] The utility model has the advantages of the following beneficial effects:

[0013] The utility model discloses a fixing body, a sealing plug, a sealing pad, a column body, a vertical rod and a spring are arranged on the outer rotating ring, the column body and the limiting mouth are fixed to the double -layer sealing part, and the installation of the double -layer sealing part is further completed, need not rotating operation, reduce the operation complexity, and avoid the problem that the long -term screwing leads to thread abrasion or sealing pad ageing, and because the spring has the elastic deformation ability, the device can absorb the radial runout and thermal expansion of the slewing bearing body.

[0014] The utility model discloses a fixing body, a sealing plug, a sealing pad, a column body, a vertical rod and a spring are arranged on the outer rotating ring, the column body and the limiting mouth are fixed to the double -layer sealing part, and the installation of the double -layer sealing part is further completed, need not rotating operation, reduce the operation complexity, and avoid the problem that the long -term screwing leads to thread abrasion or sealing pad ageing, and because the spring has the elastic deformation ability, the device can absorb the radial runout and thermal expansion of the slewing bearing body.

[0015] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the structure schematic diagram of the slewing support whole.

[0017] Figure 2 It is the structure schematic diagram of the outer rotating ring.

[0018] Figure 3 It is Figure 2 It is the enlarged structure schematic diagram of A place in the middle.

[0019] Figure 4 It is the internal structure schematic diagram of the outer rotating ring.

[0020] In the drawing: 1, slewing bearing body;101, sealing band;102, inner rotating ring;2, outer rotating ring;201, sealing groove;202, columnar groove;203, sliding slot;204, sealing ring groove;205, convex edge;206, round groove;207, oil storage groove;3, sealing plug;301, limiting mouth;302, flange;4, sealing pad;5, column body;6, vertical rod;7, spring;8, protrusion;9, neodymium magnet. DETAILED DESCRIPTION

[0021] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0022] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a slewing bearing double-layer sealing structure, including slewing bearing body 1, slewing bearing body 1 has outer race 2, outer race 2 is internally provided with oil storage groove 207, oil storage groove 207 is communicated with sealing groove 201, sealing plug 3 is located at the top of oil storage groove 207, and the lubricating oil injected from sealing groove 201 can be stored by the setting oil storage groove 207, slewing bearing body 1 also has sealing band 101 and inner race 102, inner race 102 is mutually matched with outer race 2, and sealing band 101 is arranged at the top and bottom of the connecting place of inner race 102 and outer race 2, outer race 2 is provided with sealing groove 201, double-layer sealing portion is matched in sealing groove 201, double-layer sealing portion has sealing plug 3 and sealing pad 4, the top of sealing plug 3 is provided with flange 302, flange 302 is located at the top of sealing groove 201, and flange 302 can facilitate pulling sealing plug 3, a column of protrusions 8 is formed on the both sides of sealing plug 3, outer race 2 is internally provided with circular groove 206 matched with protrusion 8, circular groove 206 is communicated with sealing groove 201, by the setting protrusion 8, when sealing plug 3 is installed into sealing groove 201, protrusion 8 enters circular groove 206, to ensure the correct installation position of double-layer sealing portion, sealing pad 4 is sleeved at the bottom of sealing plug 3, outer race 2 is internally provided with sealing ring groove 204 matched with sealing pad 4, sealing ring groove 204 is communicated with sealing groove 201, outer race 2 is internally provided with cylindrical groove 202, cylindrical groove 202 is slidably matched with column body 5, column body 5 is connected with vertical rod 6, outer race 2 is internally provided with sliding groove 203 matched with vertical rod 6, sliding groove 203 is communicated with cylindrical groove 202, by the setting vertical rod 6, the movement of column body 5 can be limited, and column body 5 is moved conveniently, limiting port 301 matched with column body 5 is formed on sealing plug 3, spring 7 is connected between the inner side wall of cylindrical groove 202 and the outer surface of column body 5, when double-layer sealing portion is installed, vertical rod 6 is pulled to the two sides, so that vertical rod 6 slides along corresponding sliding groove 203 and drives column body 5 to move along cylindrical groove 202, and spring 7 is compressed, sealing plug 3 is placed into sealing groove 201, so that sealing pad 4 is matched and enters sealing ring groove 204, at this time, protrusion 8 enters circular groove 206, to ensure the correct installation position of double-layer sealing portion, at this time, vertical rod 6 is loosened, and the end of column body 5 is pushed into limiting port 301 by spring 7 to fix sealing plug 3.

[0023] The bottom end of the sealing plug 3 is embedded with a neodymium magnet 9, which is annularly arranged at the bottom of the sealing plug 3, and the outer rotating ring 2 is internally provided with a convex edge 205 matched with the neodymium magnet 9, which is made of low-carbon steel or other magnetic conductive material; after the sealing plug 3 is fixed to the inside of the sealing groove 201, at this time, the neodymium magnet 9 and the convex edge 205 of the outer rotating ring 2 are matched to form a magnetic suction sealing layer, which can directly block the leakage of lubricating oil from the oil storage groove 207.

[0024] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A slewing bearing double-layer sealing structure, comprising a slewing bearing body (1), characterized in that: the slewing bearing body (1) has an outer rotating ring (2) with a sealing groove (201) formed therein, and a double-layer sealing part is fitted in the sealing groove (201); the double-layer sealing part has a sealing plug (3) and a sealing gasket (4), the sealing gasket (4) is sleeved at the bottom of the sealing plug (3), the outer rotating ring (2) is provided with a sealing ring groove (204) matched with the sealing gasket (4), and the sealing ring groove (204) is communicated with the sealing groove (201); the outer rotating ring (2) is provided with a cylindrical groove (202) therein, a column (5) is slidably fitted in the cylindrical groove (202), the sealing plug (3) is provided with a limiting opening (301) matched with the column (5), and a spring (7) is connected between the inner side wall of the cylindrical groove (202) and the outer surface of the column (5).

2. The double seal structure of a slewing bearing according to claim 1, wherein A flange (302) is mounted on the top of the sealing plug (3), and the flange (302) is located at the top of the sealing groove (201).

3. The double seal structure of a slewing bearing according to claim 2, characterized in that, A row of protrusions (8) are formed on both sides of the sealing plug (3), the outer rotating ring (2) is provided with a circular groove (206) matched with the protrusions (8), and the circular groove (206) is communicated with the sealing groove (201).

4. The double seal structure of a slewing bearing according to claim 1, wherein The column (5) is connected with a vertical rod (6), the outer rotating ring (2) is provided with a sliding groove (203) matched with the vertical rod (6), and the sliding groove (203) is communicated with the cylindrical groove (202).

5. The double seal structure of a slewing bearing according to claim 1, wherein A neodymium magnet (9) is embedded at the bottom end of the sealing plug (3), and the outer rotating ring (2) is provided with a convex edge (205) matched with the neodymium magnet (9).

6. The double seal structure of a slewing bearing according to claim 1, wherein The outer rotating ring (2) is provided with an oil storage groove (207), the oil storage groove (207) is communicated with the sealing groove (201), and the sealing plug (3) is located at the top of the oil storage groove (207).

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