CN220204423U - Four-point contact ball type slewing bearing with sealing structure - Google Patents

Abstract

The utility model belongs to the technical field of bearing assembly and manufacturing, and particularly relates to a four-point contact ball type slewing bearing with a sealing structure. The sealing structure of the utility model adopts spring ring sealing, is very suitable for sealing small-size bearings, has simple sealing structure and easy processing and installation, and the service life and reliability of the spring ring are higher than those of nylon materials. The small four-point contact ball type slewing bearing provided by the utility model meets the bearing capacity requirement and the sealing requirement due to the size limitation, and reduces the processing difficulty.

Description

Four-point contact ball type slewing bearing with sealing structure

Technical Field

The utility model belongs to the technical field of bearing assembly and manufacturing, and particularly relates to a four-point contact ball type slewing bearing with a sealing structure.

Background

The common four-point contact ball type slewing bearing sealing structure is formed by designing a labyrinth type for a nylon sealing ring or a ferrule, and for a small-sized and limited-space small-size four-point contact ball type slewing bearing, the nylon sealing ring is small in size and thin in sealing lip, the sealing lip is easy to wear during the working of the bearing to influence the service life, and the nylon sealing ring is large in size enough to be required by the bearing, otherwise, the wall of the bearing ferrule is too thin. The above structure can not meet the sealing requirement of the bearing.

Disclosure of Invention

According to the defects of the prior art, the utility model aims to provide a small four-point contact ball type slewing bearing sealing structure, which can achieve the design reliability and service life of the slewing bearing sealing structure with small size.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the utility model provides a four-point contact ball slewing bearing with seal structure, includes inner circle, outer lane, steel ball and holder, the steel ball passes through the holder to be kept between inner circle and outer lane, and slewing bearing's both sides are provided with the spring ring, the both sides of outer lane internal diameter are provided with annular seal groove, the spring ring assembly to in the seal groove, the both sides of inner circle external diameter are provided with step breach, the spring ring and the step breach clearance fit of inner circle external diameter.

Further, the end faces of the two sides of the inner diameter of the outer ring are provided with flaring inclination angles which are convenient for the installation of the spring ring, and the sealing groove is positioned on the inner side of the inclination angles.

Further, the inclination angles of the end surfaces at the two sides of the inner diameter of the outer ring are 30 degrees.

Further, the outer ring is of a split structure formed by combining two half outer rings.

Further, the two half outer rings are provided with corresponding through holes, and are connected with the host equipment in a mounting way through the through holes by bolts.

Further, the spring ring is of a C-shaped structure with an opening.

Further, the spring ring is in interference fit with the sealing groove in the radial direction.

The beneficial effects of the utility model are as follows: the sealing structure of the utility model adopts spring ring sealing, is very suitable for sealing small-size bearings, has simple sealing structure and easy processing and installation, and the service life and reliability of the spring ring are higher than those of nylon materials. The small four-point contact ball type slewing bearing provided by the utility model meets the bearing capacity requirement and the sealing requirement due to the size limitation, and reduces the processing difficulty.

Drawings

FIG. 1 is a schematic view of a four-point contact ball slewing bearing with a sealing structure according to the present utility model;

FIG. 2 is an enlarged view of a seal structure;

FIG. 3 is a schematic view of a spring coil;

in the figure: 1. the steel ball bearing comprises an outer ring, 2, an inner ring, 3, a steel ball, 4, a retainer, 5, a spring ring, 6, a stepped notch, 7 and a through hole.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1-3, a four-point contact ball type slewing bearing with a sealing structure comprises an inner ring 2, an outer ring 1, a steel ball 3 and a retainer 4, wherein the steel ball 3 is held between the inner ring 2 and the outer ring 1 through the retainer 4, spring rings 5 are arranged on two sides of the slewing bearing, annular sealing grooves are arranged on two sides of the inner diameter of the outer ring, the spring rings 5 are assembled in the sealing grooves, stepped notches 6 are arranged on two sides of the outer diameter of the inner ring, and the spring rings 5 are in clearance fit with the stepped notches 6 of the outer diameter of the inner ring.

Based on the technical scheme, the stepped notch 6 and the spring ring 5 are matched to effectively prevent lubricating oil from flowing out, and meanwhile external dust can be prevented from entering the slewing bearing.

Further, the end faces of the two sides of the inner diameter of the outer ring 1 are provided with flaring inclination angles which are convenient for the installation of the spring ring, and the sealing groove is positioned on the inner side of the inclination angles. The inclination angles of the end faces on the two sides of the inner diameter of the outer ring are 30 degrees.

Further, the outer ring 1 is a split structure formed by combining two half outer rings. The two half outer rings are provided with corresponding through holes 7, and are connected with a host device in a mounting way through the through holes 7 by bolts. The arrangement of the two half outer rings is convenient for the assembly of the steel balls.

Further, the spring ring 5 has a C-shaped structure with an opening. The spring ring 5 is in interference fit with the sealing groove in the radial direction.

Based on the technical scheme, the opening part tends to be closed after the spring ring 5 is assembled, and the spring ring is installed in the sealing groove in a compressed state and can be in interference fit with the sealing groove.

The structure of the utility model has the following characteristics: the two outer rings are combined together for processing, and are installed and connected with host equipment through bolts by through holes. The half outer ring is convenient for the installation of the steel ball and the retainer. As shown in FIG. 2, the sealing groove is designed at the inner diameter, the upper end face is designed at an angle of 30 degrees, the spring ring is convenient to install, the dimension d2 is larger than the dimension d1, after the spring ring is installed in the sealing groove, the contact area between the spring ring and the upper end face of the dimension d1 is increased, and the installation is more stable. As shown in FIG. 2, the end face of the inner ring 2 is designed to be stepped, and D2-D4> D5-D5, so that the spring ring can be installed in a sealing groove. The spring ring 5 is provided with a notch d6, and after the spring ring is installed in a sealing groove of a half outer ring of the part 01, the notch d6 is closed, so that a sealing effect is finally achieved.

The small four-point contact ball type slewing bearing provided by the utility model meets the bearing capacity requirement and the sealing requirement due to the size limitation, and reduces the processing difficulty. Sample trial production, delivery, and ground suitability testing have been completed and the product is being used on the host. After the random use by users, the performance is good, and the use requirements of clients are met.

It should be noted that the detailed portions of the present utility model are not described in the prior art.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The foregoing list is only the preferred embodiments of the present utility model. Obviously, the utility model is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present utility model.

Claims (7)

1. Four-point contact ball type slewing bearing with seal structure, its characterized in that: the steel ball is held between the inner ring and the outer ring through the retainer, spring rings are arranged on two sides of the slewing bearing, annular sealing grooves are arranged on two sides of the inner diameter of the outer ring, the spring rings are assembled in the sealing grooves, step-type gaps are formed on two sides of the outer diameter of the inner ring, and the spring rings are in clearance fit with the step-type gaps of the outer diameter of the inner ring.

2. The four-point contact ball pivot bearing with sealing structure of claim 1, wherein: the end faces of the two sides of the inner diameter of the outer ring are provided with flaring type dip angles which are convenient for the installation of the spring ring, and the sealing groove is positioned on the inner side of the dip angles.

3. The four-point contact ball pivot bearing with sealing structure of claim 2, wherein: the inclination angles of the end faces on the two sides of the inner diameter of the outer ring are 30 degrees.

4. The four-point contact ball pivot bearing with sealing structure of claim 1, wherein: the outer ring is of a split type structure formed by combining two half outer rings.

5. The four-point contact ball pivot bearing with sealing structure of claim 4, wherein: the two half outer rings are provided with corresponding through holes, and are connected with a host device in an installation way through the through holes by bolts.

6. The four-point contact ball pivot bearing with sealing structure of claim 1, wherein: the spring ring is of a C-shaped structure with an opening.

7. The four-point contact ball pivot bearing with sealing structure of claim 1, wherein: the spring ring is in interference fit with the sealing groove in the radial direction.