CN114645903A - High-rotating-speed high-strength injection molding retainer - Google Patents

Abstract

The invention provides a high-rotating-speed high-strength injection molding retainer, which belongs to the technical field of bearing retainers and comprises a retainer body, wherein an inward-concave arc-shaped notch is arranged on the inner cylindrical surface and/or the outer cylindrical surface of the retainer body, at least two ball pockets are uniformly arranged at the upper end of the retainer body along the circumferential direction, oil grooves are arranged on the surfaces of the inner sides of the ball pockets, which are used for contacting with bearing rolling pieces, oil grooves are arranged on the surfaces, two sides of each ball pocket are provided with holding claws used for preventing the bearing rolling pieces from falling off the ball pockets, and the back surfaces of the holding claws are provided with reinforcing ribs; the invention has the advantages of high rotating speed, high load, low noise, corrosion interference resistance, light weight and the like.

Description

A high-speed and high-strength injection-molded cage

technical field

The invention belongs to the technical field of bearing cages, and particularly relates to a high-speed and high-strength injection molding cage.

Background technique

With the rapid development of machinery, aviation and other related industries, it has become one of the current development trends to increase the rotational speed of the rotating shaft of the rotating system and increase the work efficiency. The high-speed performance and precision of rolling bearings must also be continuously improved with the requirements of the rotational speed and precision of the mechanical shaft.

The high-speed performance and precision of rolling bearings are not only affected by the material and machining precision of the bearing itself, but also the structural design of the bearing. Due to the increasing awareness of energy saving and environmental protection in recent years, various parts and components of vehicles and precision machinery have begun to develop in the direction of light weight and energy saving. Design requirements, therefore, how to develop a light-weight, energy-saving cage suitable for high-speed rotation has become the goal of the relevant industry.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention provides a high-speed and high-strength injection-molded cage that can reduce the weight of the bearing while ensuring that the cage has high strength and avoid the large displacement of the bearing rolling elements during rotation.

In order to solve the above technical problems, the technical solution provided by the present invention is a high-speed and high-strength injection-molded cage, which includes a cage body, and the inner cylindrical surface and/or the outer cylindrical surface of the cage body is provided with an inward depression The upper end of the cage body is evenly provided with at least two ball pockets along the circumferential direction, the inner side of the ball pockets is provided with oil grooves on the surface used to contact the bearing rolling elements, and the two sides of the ball pockets are provided with useful To prevent the bearing rolling element from falling out of the holding claw of the ball pocket, the back of the holding claw is provided with a reinforcing rib. In this way, during the working process of the bearing, the present invention can fix the bearing rolling elements through the ball pocket and the holding claws on the ball pocket, so as to prevent them from deviating from the center line or coming out of the ball pocket; at the same time, the present invention can also increase the holding claws through the reinforcing ribs. In addition, the present invention can also continuously lubricate the bearing rolling elements through the lubricating oil in the oil groove inside the ball pocket, reduce the friction between the bearing rolling elements and the cage body, and reduce the generation of the bearing rolling elements during the rotation process. noise.

Further, the inner cylindrical surface and the outer cylindrical surface of the cage body are provided with inwardly recessed arc-shaped notch, and in the same horizontal section, the arc-shaped notch set on the inner cylindrical surface of the cage body is The notch depth is the same as the notch depth of the arc-shaped notch set on the outer cylindrical surface of the cage body, so that it can reduce the weight of the cage body through the arc-shaped notch, and at the same time ensure that the bearing rolling element in the ball pocket is always located in the corresponding ball. The central position of the pocket and the central position of the cage body can avoid deflection of the bearing rolling elements and enhance the strength and stability of the entire cage body.

Further, a pocket hole is provided on the ball pocket, and the wall of the pocket hole includes a circular arc concave section located at the bottom of the pocket hole and a vertical concave section located on both sides of the pocket hole. The vertical concave section The vertical direction is parallel to the axis line of the cage body, the bottom of the vertical concave section is connected with the top of the arc concave section, and the top of the vertical concave section and the claw tip of the corresponding holding claw form an obliquely straight inner section. concave section. In this way, during the rolling process of the bearing rolling elements, due to the change of the hole wall structure of the ball pockets of the cage body provided by the present invention, the main contact between the ball pockets and the bearing rolling elements is changed from surface contact to point contact. Thereby, the contact area and friction force between the bearing rolling element and the pocket are reduced, the high-speed performance of the corresponding bearing is improved, and the heat generated during the operation of the bearing is reduced.

Further, the bottom of the vertical concave section and the circular arc concave section are connected by a tangential concave section, the tangential concave section is tangent to the circular arc concave section, and the vertical concave section is connected to the circular arc. Smooth transition connection between concave segments.

Further, the circular arc concave section, the tangential concave section, the vertical concave section, and the oblique straight concave section are symmetrically arranged with respect to the ball pocket, and the center of the circular arc concave section is vertical on both sides. The center of symmetry of the straight concave segment.

Further, the oil groove is arranged on the arc inner concave section of the pocket hole wall, so that during the working process of the bearing, after the lubricating oil enters the cage body, the present invention can store a certain amount of lubricating oil in the oil groove, And ensure good lubrication of bearings.

Further, the cage body is manufactured by an integral injection molding process, and the manufacturing process is simple and efficient.

Further, the material of the cage body is glass fiber reinforced nylon, and the cage body can work stably at -40°C to 150°C.

It can be seen from the above technical solutions that the present invention has the following advantages: first, the present invention reduces the weight of the cage body by setting gaps on the inner and outer sides of the cage body; at the same time, it can also ensure the bearing rolling elements in the ball pockets It is always located at the center of the cage body to avoid deflection of the bearing rolling elements during the rotation of the bearing; secondly, the present invention can store the lubricating oil through the oil groove inside the ball pocket, and pass the lubricating oil in the oil groove to the bearing in the ball pocket. The rolling elements are continuously lubricated, thereby reducing the friction between the bearing rolling elements and the ball pockets, and reducing the noise generated when the bearing rolling elements roll; in addition, the present invention changes the surface contact between the ball pockets and the bearing rolling elements from mainly surface contact to Point contact is the main method, thereby reducing the contact area and friction between the bearing rolling elements and the pocket, improving the high-speed performance of the corresponding bearing, and reducing the heat generated during the operation of the bearing.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, which are not relevant to ordinary skills in the art. As far as personnel are concerned, other drawings can also be obtained from these drawings on the premise of no creative work.

FIG. 1 is a schematic structural diagram of a specific embodiment of the present invention.

FIG. 2 is a top view of a specific embodiment of the present invention.

FIG. 3 is a cross-sectional view at A-A in FIG. 2 .

In the figure: 1. Pocket hole, 2. Arc concave section, 3. Claw, 4. Reinforcing rib, 5. Vertical concave section, 6. Oblique straight concave section, 7. Outer cylindrical surface, 8. Oil tank, 9. Inner cylindrical surface, 10. Arc-shaped notch.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIGS. 1 to 3 , the present invention provides a high-speed and high-strength injection-molded cage, which includes an integrally injection-molded cage body, and the upper end of the cage body is uniformly provided with at least two ball pockets along the circumferential direction , the two sides of the ball pocket are provided with holding claws 3 for preventing the bearing rolling element from falling out of the ball pocket, and the back of the holding claw 3 is provided with a reinforcing rib 4 . In addition, the inner cylindrical surface 9 and/or the outer cylindrical surface 7 of the cage body are provided with inwardly recessed arc-shaped notches 10, and when the inner cylindrical surface 9 and the outer cylindrical surface 7 of the cage body are When both are provided with an inwardly recessed arc-shaped gap 10, in the same horizontal section, the gap depth of the arc-shaped gap 10 set on the inner cylindrical surface 9 of the cage body and the gap depth on the outer cylindrical surface 7 of the cage body are the same. The notch depth of the arc-shaped notch 10 is set to be the same, so as to ensure that the bearing rolling element installed in the cage body is always located at the center position of the corresponding ball pocket and the center position of the cage body, and to prevent the bearing rolling element from rotating at high speed during high-speed rotation. deflection occurs.

In addition, pocket holes 1 for accommodating bearing rolling elements are also provided on the ball pockets. The vertical concave section 5, the vertical direction of the vertical concave section 5 is parallel to the axis of the cage body, and the bottom of the vertical concave section 5 and the top of the arc concave section 2 pass through the tangent line. The concave sections are connected, and the oblique straight concave section 6 is formed between the top of the vertical concave section 5 and the claw tip of the corresponding holding claw 3, and the circular arc concave section 2, the tangential concave section, and the vertical concave section 5 , The oblique straight concave section 6 is symmetrically arranged with respect to the ball pocket where it is located, and the center of the circular arc concave section 2 is the symmetrical center of the vertical concave sections 5 on both sides.

In addition, preferably, in the present invention, an oil groove 8 is provided on the arc inner concave section 2 on the hole wall of the ball pocket 1, so that the lubricating oil is stored through the oil groove 8 and the bearing rolling element is continuously lubricated. Moreover, the oil groove 8 may be a circular groove, a square groove, or a special-shaped groove such as a U-shaped groove.

The terms "first", "second", "third", "fourth", etc. (if present) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to Describe a particular order or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A high-speed and high-strength injection-molded cage, characterized in that it comprises a cage body, the inner cylindrical surface and/or the outer cylindrical surface of the cage body is provided with an inwardly concave arc-shaped notch, and the retaining The upper end of the frame body is evenly provided with at least two ball pockets along the circumferential direction, an oil groove is provided on the surface of the inner side of the ball pocket for contact with the bearing rolling element, and both sides of the ball pocket are provided with a ball pocket to prevent the bearing rolling element from falling out. The holding claw is provided with reinforcing ribs on the back of the holding claw. 2 . The high-speed and high-strength injection-molded cage according to claim 1 , wherein the inner cylindrical surface and the outer cylindrical surface of the cage body are provided with inwardly concave arc-shaped notch, and the same horizontal section Inside, the notch depth of the arc-shaped notch set on the inner cylindrical surface of the cage body is the same as the notch depth of the arc-shaped notch set on the outer cylindrical surface of the cage body. 3 . The high-speed and high-strength injection-molded cage according to claim 1 or 2 , wherein a pocket hole is provided on the ball pocket, and the wall of the pocket hole includes a circular arc concave section located at the bottom of the pocket hole. 4 . and vertical concave sections located on both sides of the pocket, the vertical direction of the vertical concave section is parallel to the axis of the cage body, and the bottom of the vertical concave section and the top of the arc concave section connected, an oblique straight concave section is formed between the top of the vertical concave section and the claw tip of the corresponding holding claw. 4 . The high-speed and high-strength injection-molded cage according to claim 3 , wherein the bottom of the vertical concave section and the circular arc concave section are connected by a tangential concave section, and the tangential concave section is connected to the tangential concave section. The concave segments of the arc are tangent. 5 . The high-speed and high-strength injection-molded cage according to claim 4 , wherein the circular arc concave section, the tangential concave section, the vertical concave section, and the oblique straight concave section are relative to the ball pocket where they are located. 6 . are symmetrically arranged, and the center of the circular arc concave segment is the symmetrical center of the vertical concave segments on both sides. 6 . The high-speed and high-strength injection-molded cage according to claim 3 , wherein the oil groove is arranged on the arc inner concave section of the pocket hole wall. 7 . 7 . The high-speed and high-strength injection-molded cage according to claim 1 or 2 , wherein the cage body is made by an integral injection molding process. 8 . 8. The high-speed and high-strength injection-molded cage according to claim 1 or 2, wherein the cage body is made of glass fiber reinforced nylon, and the cage body can be operated at -40°C to 150°C. Stable work.

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