CN219413253U - Injection molding compound type cylindrical needle roller retainer - Google Patents

Abstract

The application discloses compound cylinder kingpin holder moulds plastics, set up the ball pocket of installation ball at the kingpin holder, evenly set up the kingpin pocket of a plurality of installation kingpins between adjacent ball pocket, the diameter setting of ball is slightly greater than the diameter of kingpin, set up in ball complex indent raceway at the inner wall of holder complex bearing inner circle and bearing outer lane, after ball and raceway cooperation, the raceway face of kingpin can with the partial contact of bearing inner circle and bearing inner circle inner wall not setting up the raceway, the bearing part bears high radial load, when bearing bears axial force, the ball restriction takes place to break away from at bearing inner circle and bearing outer lane raceway, prevent that the inner and outer lane of bearing from taking place to break away from by the ball part, the holistic small in size of bearing, the demand of satisfying the customer that can be fine, the usage is more extensive.

Description

Injection molding compound type cylindrical needle roller retainer

Technical Field

The application belongs to the field of cylindrical bearing retainers, and particularly relates to an injection molding compound type cylindrical needle roller retainer.

Background

The cylindrical needle bearing has high bearing capacity, comprises long and thin rolling bodies, is suitable for high speed and is particularly easy to install, because the radial section of the retainer is the same as the diameter of the needle, the needle and the retainer assembly can be applied to very small shaft and bearing seat inner spaces, and can be widely applied to universal joint shafts, hydraulic pumps, sheet rolling mills, rock drills, machine tool gearboxes, automobile and tractor gearboxes, mechanical parts with swinging motion of connecting rods and shafts (or shells) and textile equipment, and the application of the cylindrical needle bearing is expanding continuously.

In general, the bearing needs to bear axial and radial loads, the axial load or thrust load is a force acting parallel to the axis of the bearing, the radial load is a force acting perpendicular to the axis of the bearing, most of the inner and outer rings of the needle bearing are separable and are only suitable for radial force, if the inner and outer rings of the ball bearing are easily separated by the axial load, the needle bearing can bear very high radial force and can bear certain axial force in different bearing combination modes such as a combined needle bearing, a needle/angular contact ball bearing and the like, the whole volume of the needle bearing is relatively large, the use advantage of the needle bearing under a very small space is limited, and the load capacity of the needle bearing needs to be born is a very important problem in selecting bearing products of a plurality of manufacturers. What is needed in the course of operation is a bearing product that is very environmentally friendly, shock and vibration. The design of the needle bearing product is more and more in line with various machines, the needle bearing can bear very high radial force and certain axial force, is small in size and can well meet the requirements of customers, and therefore, the prior art needs to be further improved and improved.

Disclosure of Invention

The utility model provides an injection molding compound type cylindrical needle roller retainer, which aims to solve at least one of the technical problems.

In order to achieve the above purpose, the utility model provides an injection molding compound cylindrical needle roller retainer which is arranged between an inner ring and an outer ring of a needle roller bearing, and comprises two circular ring structures and a plurality of window beams uniformly connected with the circular ring structures, wherein pockets are formed between the adjacent window beams, each pocket comprises a needle roller pocket and a ball pocket, a plurality of needle roller pockets are arranged between the adjacent ball pockets, needle rollers are arranged in the needle roller pockets, balls are arranged in the ball pockets, the diameter of each ball roller is larger than that of each needle roller, raceways matched with the corresponding ball rollers are arranged on the inner ring and the outer ring of the needle roller bearing, and after the balls are matched with the raceways, rolling surfaces of the needle rollers are contacted with the inner ring and the outer ring of the needle roller bearing.

Above-mentioned structure, set up the ball pocket of installation ball at the bearing holder, evenly set up the bearing pocket of a plurality of installation bearing pins between adjacent ball pocket, the diameter setting of ball is slightly greater than the diameter of bearing pin, the inner wall at holder complex bearing inner race and bearing outer lane sets up in the indent raceway of ball complex, after ball and raceway cooperation, the raceway face of bearing pin can with the partial contact of bearing inner race and bearing inner race inner wall not setting up the raceway, the bearing pin bears high radial load, when bearing pin bears axial force, the ball is restricted at bearing inner race and bearing outer lane's raceway, prevent that the inner and outer lane of bearing from taking place to break away from, bear lighter axial load by the ball, the holistic small in size of bearing pin, the demand of satisfying customer that can be fine, the usage is more extensive.

In a preferred implementation manner, two positioning bosses are arranged in the ball pocket, the positioning bosses are provided with first arc contact surfaces, the two positioning bosses are respectively arranged on the two circular ring structures and enable the two first arc contact surfaces to be opposite, and the balls are limited between the two opposite first arc contact surfaces.

Two positioning bosses in the ball pocket are formed by integral injection molding of two circular ring structures, and a first arc contact surface is arranged on the two positioning bosses, so that the balls can be positioned, and the friction resistance of the balls is reduced.

In a preferred implementation manner, a second arc contact surface is arranged on one side, facing the ball pocket, of the window beams on two sides of the ball pocket, and the second arc contact surface is matched with the first arc contact surface so that the balls are limited in the middle of the ball pocket.

The window beam side walls at two sides of the ball pocket hole are provided with the second arc contact surfaces towards the window beam side walls of the ball pocket hole, the balls are limited in the middle of the ball pocket hole through the cooperation of the second arc contact surfaces and the first arc contact surfaces, and the structural design is more reasonable.

In a preferred implementation, the width of the positioning boss is smaller than the width of the ball pocket, and an oil passing gap is formed between the positioning boss and the window beam after the balls are assembled to the ball pocket.

The arrangement of the oil passing gap can increase the pocket gap, thereby increasing the fluidity of the lubricating oil, being beneficial to the lubrication of the ball and leading the ball to be more suitable for the needle bearing running at high speed.

In a preferred implementation manner, the positioning boss is provided with a through channel, one end of the through channel is opened and arranged on the first arc contact surface, and the other end of the through channel is opened and arranged on the outer wall of the positioning boss facing the direction of the bearing inner ring or the direction of the bearing outer ring.

Through channel that the boss set up in the location, one end opening sets up at first circular arc contact surface, and the other end opening sets up the outer wall of location boss towards bearing inner race or bearing inner race direction, and design like this when the bearing high-speed rotation, because of the lubricating oil under the centrifugal force effect can flow to first circular arc contact surface through the through channel by the opening on the outer wall through the bearing inner race direction, lubricate the ball, guarantee the lubrication of ball, reduce its friction temperature rise, make it more be suitable for the bearing roller pin cooperation and carry out high-speed operation.

In a preferred implementation manner, a cylindrical contact surface is arranged on one side, facing the needle roller pocket, of the window beams on two sides of the needle roller pocket, and the needle roller is limited between the two opposite cylindrical contact surfaces.

The roller pin is arranged on the opposite cylindrical contact surface so that the roller pin and the window beam can face the contact surface of the pocket Kong Yimian, thereby reducing friction resistance and being beneficial to the rotation of the roller pin.

In a preferred implementation manner, the outer diameter surface of the window beam is provided with a first elastic locking piece, the inner diameter surface of the window beam is provided with a second elastic locking piece, and the distance between two opposite first elastic locking pieces of adjacent window beams and the distance between two opposite second elastic locking pieces of adjacent window beams are smaller than the width of the pocket.

The first elastic locking piece and the second elastic locking piece limit radial movement of the ball and the needle roller, and the structural design is more reasonable.

In a preferred embodiment, the first elastic locking element is formed by a plurality of curved projections curved in the direction of the pocket, which are arranged at intervals along the length direction of the window beam.

The discontinuous arc-shaped boss is arranged to lighten the whole weight of the retainer, limit the radial falling-off of the arc-shaped boss and play a role in locking.

In a preferred implementation, the second resilient locking member comprises two trapezoidal shaped bosses, the length of which fits the length of the window beam.

The trapezoidal boss can increase the structural strength of window beam.

The structure has the following beneficial effects:

1. when the needle roller bearing bears axial force, the balls are limited on the raceways of the inner ring and the outer ring of the bearing, so that the inner ring and the outer ring of the bearing are prevented from being separated, the balls bear lighter axial load, the whole volume of the needle roller bearing is small, the requirements of customers can be well met, and the application is wider.

2. The contact surface between the ball and the needle roller and the bearing inner ring and the bearing outer ring is greatly reduced, friction resistance is reduced, and the service life of the needle roller bearing is greatly prolonged.

3. The arrangement of the oil passing gap can increase the pocket gap, thereby increasing the fluidity of the lubricating oil, being beneficial to the lubrication of the ball and leading the ball to be more suitable for the needle bearing running at high speed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the present application and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a schematic perspective view of an exemplary embodiment of the present utility model;

FIG. 2 is a schematic view of a positioning boss according to an exemplary embodiment of the present utility model;

FIG. 3 is a schematic view of an exemplary embodiment of the needle and ball arrangement of the present utility model;

FIG. 4 is a schematic structural view of an exemplary embodiment of a raceway of the present utility model;

description of the reference numerals:

1. a pocket; 10. needle roller pocket holes; 11. ball pockets; 110. positioning the boss; 1100. a first arc contact surface; 1101. a through passage;

2. a circular ring structure;

3. a window beam; 30. a second arc contact surface; 31. an oil passing gap; 32. a cylindrical contact surface; 33. a first elastic locking piece; 330. arc-shaped bosses; 34. a second elastic locking piece; 340. a trapezoidal boss;

4. needle roller;

5. a ball;

6. a bearing inner ring;

7. a bearing outer ring;

8. a raceway.

Detailed Description

In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced in other ways than as described herein, and therefore the scope of the present utility model is not limited by the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements 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. 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.

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 directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that a direct connection indicates that two bodies connected together do not form a connection relationship by an excessive structure, but are connected to form a whole by a connection structure. 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.

The description as it relates to "first", "second", etc. in the present utility model is for descriptive purposes only and is 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.

As shown in fig. 1-4, the utility model provides an injection molding compound type cylindrical needle roller retainer, which is arranged between an inner ring and an outer ring of a needle roller bearing, and comprises two circular ring structures 2 and a plurality of window beams uniformly connected with the circular ring structures 2, wherein pockets 1 are formed between the adjacent window beams 3, each pocket 1 comprises a needle roller pocket 10 and a ball pocket 11, a plurality of needle roller pockets 10 are arranged between the adjacent ball pockets 11, a needle roller 4 is arranged in each needle roller pocket 10, a ball 5 is arranged in each ball pocket 11, the diameter of each ball 5 is larger than that of each needle roller 4, raceways 8 matched with the corresponding ball 5 are arranged on the inner ring and the outer ring of the needle roller bearing, and after the balls 5 are matched with the raceways 8, rolling surfaces of the needle roller 4 are contacted with the inner ring and the outer ring of the needle roller bearing.

According to the structure, the ball pockets 11 of the balls 5 are arranged on the needle roller retainer, the needle roller pockets 10 for installing the needle rollers 4 are uniformly arranged between the adjacent ball pockets 11, the diameter of the ball 5 is slightly larger than that of the needle rollers 4, the inner walls of the bearing inner ring 6 and the bearing outer ring 7 matched with the retainer are provided with the concave rollaway nest 8 matched with the ball 5, after the ball 5 is matched with the rollaway nest 8, the rollaway nest 8 surface of the needle rollers 4 can be contacted with the portions of the bearing outer ring 7 and the inner wall of the bearing inner ring 6, which are not provided with the rollaway nest 8, the needle rollers 4 bear high radial load, and the ball rollers 5 can bear radial and axial load, so that the universality is high, when the needle rollers 4 bear axial force, the rollaway nest 8 of the bearing inner ring 6 and the bearing outer ring 7 is prevented, the bearing is borne by lighter axial load by the ball 5, the whole volume of the needle roller bearing is small, the requirements of customers can be well met, the application is wider, the contact surface of the ball 5 and the needle rollers 4 with the bearing inner ring 6 and the bearing outer ring 7 is greatly reduced, the friction resistance is favorably reduced, and the service life of the needle roller bearing is greatly prolonged.

As a first preferred embodiment of the present application, as shown in fig. 1, two positioning bosses 110 are disposed in the ball pocket 11, the positioning bosses 110 are provided with first arc contact surfaces 110, the two positioning bosses 110 are respectively disposed on the two annular structures 2 and make the two first arc contact surfaces 110 opposite, and the balls 5 are limited between the two opposite first arc contact surfaces 110.

Two positioning bosses 110 in the ball pocket 11 are integrally injection molded with the two circular ring structures 2, and first circular arc contact surfaces 110 are arranged on the two positioning bosses 110, and the balls 5 are limited between the two opposite first circular arc contact surfaces 110, so that the balls 5 can be positioned and the friction resistance of the balls 5 is reduced.

As a first preferred embodiment in this embodiment, as shown in fig. 1, the window beams 3 on both sides of the ball pocket 11 are provided with a second arc contact surface 30 on a side facing the ball pocket 11, and the second arc contact surface 30 cooperates with the first arc contact surface 110 to limit the balls 5 to the middle of the ball pocket 11.

The second arc contact surfaces 30 are arranged on the side walls of the window beams 3 on the two sides of the ball pocket 11 and towards the window beams 3 of the ball pocket 11, the second arc contact surfaces 30 are matched with the first arc contact surfaces 110 to limit the balls 5 to the middle of the ball pocket 11, so that the stress of the balls 5 is more balanced, and the stable operation of the retainer is facilitated.

Further, as shown in fig. 2, the width of the positioning boss 110 is smaller than the width of the ball pocket 11, and after the balls 5 are assembled into the ball pocket 11, an oil passing gap 31 is formed between the positioning boss 110 and the window beam.

The gap between the cage pockets 1 and the rolling elements is called a pocket gap, and is generally small. In a well lubricated rolling bearing, an extremely thin oil film can be produced in the pocket gap. By means of the oil film, the rolling bodies transmit motion and force to the retainer to enable the retainer to rotate around the axis against friction force, and the arrangement of the oil passing gap 31 can increase the pocket gap, so that the mobility of lubricating oil is increased, the lubrication of the balls 5 is facilitated, and the rolling bodies are more suitable for needle bearings running at high speed.

As a second preferred embodiment in this example, as shown in fig. 1 and 2, the positioning boss 110 is provided with a through channel 1101, one end of the through channel 1101 is opened to the first circular arc contact surface 110, and the other end is opened to the outer wall of the positioning boss 110 facing the direction of the bearing inner ring 6 or the direction of the bearing outer ring 7.

Through channel 1101 that positioning boss 110 set up, one end opening sets up in first circular arc contact surface 110, the other end opening sets up positioning boss 110 towards the outer wall of bearing inner race 7 or bearing inner race 6 orientation, so design when the bearing high-speed rotation, because of the lubricating oil under the centrifugal force effect can flow first circular arc contact surface 110 through channel 1101 by bearing inner race 6 orientation or the opening on the outer wall in the bearing outer race 7 orientation, lubricate ball 5, guarantee ball 5's lubrication, reduce its friction temperature rise, make it more be suitable for the high-speed operation of kingpin 4 cooperation.

As a second preferred embodiment of the present application, as shown in fig. 2, the side of the window beam 3 on both sides of the needle pocket 10 facing the needle pocket 10 is provided with a cylindrical contact surface 32, and the needle 4 is limited between the two opposite cylindrical contact surfaces 32.

The roller pin 4 is arranged on the opposite cylindrical contact surface 32, so that the contact surface of the roller pin 4 and the window beam 3 facing the pocket hole 1 can be realized, friction resistance is reduced, and the rotation of the roller pin 4 is facilitated.

As a third preferred embodiment of the present application, as shown in fig. 1, the outer diameter surface of the window beam 3 is provided with a first elastic locking member 33, the inner diameter surface of the window beam 3 is provided with a second elastic locking member 34, and the distance between two opposite first elastic locking members 33 of adjacent window beams 3 and the distance between two opposite second elastic locking members 34 of adjacent window beams 3 are smaller than the width of the pocket 1.

The first elastic locking piece 33 and the second elastic locking piece 34 limit radial movement of the ball 5 and the needle roller 4, and the structural design is more reasonable.

As a first preferred embodiment in the present embodiment, the first elastic locking member 33 is constituted by a plurality of arc-shaped bosses 330 curved toward the pocket 1, and the arc-shaped bosses 330 are provided at intervals along the longitudinal direction of the window beam 3.

The intermittent arc-shaped boss 330 is arranged to reduce the overall weight of the retainer, and when the needle roller 4 is assembled, the arc-shaped boss 330 of plastic has certain elasticity, the needle roller 4 and the ball 5 are pressed between the two opposite arc-shaped bosses 330, and the arc-shaped bosses 330 are restored to the original state so as to limit the radial falling-off of the arc-shaped bosses 330, thereby playing a role of locking.

As a second preferred implementation of the present embodiment, the second elastic locking member 34 includes two trapezoidal bosses 340, and the length of the trapezoidal bosses 340 is adapted to the length of the window beam.

The trapezoidal boss 340 can increase the structural strength of the window beam 333, so that it is not easy to break.

The utility model can be realized by adopting or referring to the prior art at the places which are not described in the utility model.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely exemplary of the present utility model and is not intended to limit the present utility model. Various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are to be included in the scope of the claims of the present utility model.

Claims (9)

1. The utility model provides a compound cylinder kingpin holder moulds plastics, sets up between bearing's inner circle and outer lane, including two ring structures and a plurality of window roof beams of evenly connected ring structure, form the pocket between the adjacent window roof beam, its characterized in that, the pocket includes kingpin pocket and ball pocket, and is adjacent set up a plurality of between the ball pocket the kingpin pocket, the kingpin is equipped with the kingpin in the kingpin pocket, the ball is equipped with in the ball pocket, the diameter of ball is greater than the diameter of kingpin, bearing inner circle and outer lane be equipped with ball complex raceway, the ball with after the raceway cooperation, the rolling surface of kingpin with bearing's inner circle and outer lane contact.

2. The injection molding compound cylindrical needle roller retainer according to claim 1, wherein two positioning bosses are disposed in the ball pocket, the positioning bosses are provided with first arc contact surfaces, the two positioning bosses are respectively disposed on the two annular structures and make the two first arc contact surfaces opposite, and the balls are limited between the two opposite first arc contact surfaces.

3. The injection molding compound cylindrical needle roller retainer according to claim 2, wherein a second arc contact surface is arranged on one side, facing the ball pocket, of the window beams on two sides of the ball pocket, and the second arc contact surface cooperates with the first arc contact surface to limit the balls to the middle of the ball pocket.

4. An injection molded composite cylindrical needle roller cage as defined in claim 3, wherein said positioning boss has a width less than a width of said ball pocket, and wherein an oil passing gap is formed between said positioning boss and said window beam after said ball is assembled to said ball pocket.

5. The injection molding compound type cylindrical needle roller retainer according to claim 2, wherein the positioning boss is provided with a through channel, one end of the through channel is opened on the first arc contact surface, and the other end of the through channel is opened on the outer wall of the positioning boss facing the direction of the bearing inner ring or the direction of the bearing outer ring.

6. The injection molding compound cylindrical needle roller retainer as claimed in claim 1, wherein a cylindrical contact surface is provided on a side of the window beams on both sides of the needle roller pocket facing the needle roller pocket, and the needle roller is limited between the two opposite cylindrical contact surfaces.

7. The injection molding compound cylindrical needle roller retainer according to claim 1, wherein a first elastic locking piece is arranged on an outer diameter surface of the window beam, a second elastic locking piece is arranged on an inner diameter surface of the window beam, and a distance between two opposite first elastic locking pieces of adjacent window beams and a distance between two opposite second elastic locking pieces of adjacent window beams are smaller than the width of the pocket.

8. The injection molded composite cylindrical needle roller retainer as defined in claim 7, wherein said first resilient locking member is formed of a plurality of arcuate projections curved toward the pocket, said arcuate projections being spaced along the length of said window beam.

9. The injection molded composite cylindrical needle roller cage of claim 7, wherein the second resilient locking member comprises two trapezoidal shaped bosses having a length that matches the length of the window beam.