CN206257161U - A kind of double-row angular contact bal bearing - Google Patents

Abstract

The utility model discloses a kind of double-row angular contact bal bearing, including inner ring, rolling element and outer ring, wherein rolling element is provided with two row, and the rolling element is located between inner ring and outer ring；The inner ring outside is provided with biserial rolling element locating groove, and outer ring inner side is correspondingly provided with biserial rolling element rolling groove；Or the outer ring inner side is provided with biserial rolling element locating groove, inner ring outside is correspondingly provided with biserial rolling element rolling groove.This kind of double-row angular contact bal bearing, substantially increases efficiency of assembling；Equilibrium, the stress that improve load are consistent, it is to avoid stress concentration；Substantially increase bearing reliability；And its xial feed power is strong, high precision, concentricity uniformity are strong, assembling property is good, can omit clearance adjustment, the advantages of lightweight, compact conformation, load bearing capacity are big, be easy to adjustment, good stability, grease lubrication reduction rub；Its service life is substantially increased, can be used for precise ball screw, it is easy to utilize on gear-box and various axles.

Description

A double row angular contact ball bearing

technical field

The utility model relates to a bearing, in particular to a double row angular contact ball bearing.

Background technique

With the increasing development of mechanical equipment, bearings, as a connecting part that plays a role in transmission and support, are in increasing demand. At present, the commonly used industries include: automobile hub, automobile air-conditioning clutch, automobile electromagnetic clutch, automobile water pump, machine tool spindle, motor, ball screw industry, etc. There are many types of bearings, among which angular contact ball bearings can bear radial load and axial load at the same time, so they have a wider application range; and double row angular contact ball bearings are more popular than single row angular contact ball bearings. Double row angular contact ball bearings can withstand radial loads and axial loads acting in two directions. It can limit the bidirectional axial displacement of the shaft or housing, provide a bearing configuration with high rigidity, and can withstand overturning moments. It has a high limit speed, good rigidity, and can withstand a large overturning moment. It is widely used in the front wheel hub of cars (some models also use double-row tapered roller bearings of the same size).

During the working process, the reliability of the bearing directly affects the transmission accuracy and its service life, so the quality requirements for the bearing are very strict. The traditional bearing is composed of inner ring, rolling element, cage and outer ring. This structure makes it difficult to assemble in the production line, high cost, poor reliability, and the bearing clearance needs to be adjusted during maintenance.

Moreover, the supply of domestic bearings has been monopolized by major international brands. Domestic bearing manufacturers can only engage in low-end markets or sales markets.

Utility model content

The technical problem to be solved by the utility model is to provide a double-row angular contact ball bearing, which effectively solves the existing problems of difficult assembly, high cost, poor reliability and difficult adjustment.

The technical problem to be solved by the utility model adopts the following technical solutions to realize:

A double-row angular contact ball bearing includes an inner ring, rolling elements and an outer ring, wherein the rolling elements are arranged in two rows, and the rolling elements are arranged between the inner ring and the outer ring; A row of rolling element positioning grooves, and a double row of rolling element rolling grooves are provided on the inner side of the outer ring;

Or the inner side of the outer ring is provided with double-row rolling element positioning grooves, and the outer side of the inner ring is correspondingly provided with double-row rolling element rolling grooves.

The further improvement of the utility model lies in that: the rolling body is compatible with the positioning groove of the rolling body.

The further improvement of the utility model is that: the positioning grooves of the rolling elements on the outer side of the inner ring or the inner side of the outer ring are evenly distributed.

The further improvement of the utility model is that: the hardness of the rolling body is 61-68HRC.

The utility model is further improved in that: both ends between the inner ring and the outer ring are provided with sealing rings.

The further improvement of the utility model lies in that: the cavity formed among the inner ring, the rolling elements, the outer ring and the sealing ring is filled with lubricating grease.

The further improvement of the utility model lies in that: the filling amount of the lubricating oil is 25%-35%.

The utility model is further improved in that: the groove diameter difference between the positioning grooves of the rolling elements is less than 0.004mm-0.006mm; and the axial clearance of the bearing is 0.004-0.02mm, and the radial clearance of the bearing is 0.002-0.01mm .

The utility model is further improved in that: the contact angle of the bearing is 15°-60°.

The beneficial effects of the utility model are:

1. The bearing adopts split-type inner ring and outer ring. On the one hand, it greatly improves the assembly efficiency; on the other hand, it disperses the force of the rolling elements under pressure, so that the force between the two rows of rolling elements is always relatively evenly distributed. , which improves the balance of the load, the consistency of the force, and avoids stress concentration; and when the bearing is subjected to axial pressure or overturning moment, the distance between the two rows of rolling elements can be adjusted to keep the two rows of rolling elements moving at an appropriate distance. It can be seen that the adoption of Split inner and outer rings greatly improve bearing reliability and service life.

2. The outer side of the inner ring of the bearing or the inner side of the outer ring adopts positioning grooves for rolling elements, which ensures the speed consistency of the two rows of rolling elements when they rotate, thereby reducing the speed difference between the two rows of bearing rolling elements and improving the utilization rate of the bearing ;In addition, the requirement of poor groove diameter ensures the consistency of the linear speed of the groove during operation, reduces the damage to the working surface caused by the sliding friction of the rolling elements, and greatly improves the service life of the bearing.

3. The utility model increases the contact area between the rolling body and the bearing body (outside the inner ring or inside the outer ring), so that the axial load force is strong, the precision is high, the concentricity is consistent, the assembly performance is good, and the clearance adjustment can be omitted , light weight, compact structure, large load capacity, easy adjustment, good stability, grease lubrication to reduce friction, etc.; greatly improves its service life, can be used for precision ball screws, gearboxes and various shafts, easy to promote application.

Description of drawings

Fig. 1 is the utility model sectional structure schematic diagram;

Fig. 2 is a structural schematic diagram of an inner ring of a specific embodiment of the utility model;

Fig. 3 is a schematic diagram of an outer ring structure of a specific embodiment of the utility model;

Fig. 4 is a schematic diagram of the structure of the second inner ring of the specific embodiment of the utility model;

Fig. 5 is a schematic diagram of the structure of the second outer ring of the specific embodiment of the utility model.

Among them: 1-inner ring, 2-rolling body, 3-outer ring, 4-rolling body positioning groove, 5-rolling body rolling groove, 6-sealing ring.

detailed description

In order to make the technical means, creative features, goals and effects achieved by the utility model easy to understand, the utility model will be further elaborated below in conjunction with specific illustrations.

Specific implementation mode one:

As shown in Figures 1 to 3, a double row angular contact ball bearing includes an inner ring 1, rolling elements 2 and an outer ring 3, wherein the rolling elements 2 are provided with two rows, and the rolling elements 2 are arranged on the inner ring 1 and the outer ring 3; the outer side of the inner ring 1 is provided with a double-row rolling element positioning groove 4, and the inner side of the outer ring 3 is correspondingly provided with a double-row rolling element rolling groove 5; the rolling element 2 is compatible with the rolling element positioning groove 4 match.

The rolling element positioning grooves 4 on the outer side of the inner ring 1 are evenly distributed; thus, the force between the two rows of rolling elements 2 is always maintained relatively evenly distributed, which improves the load balance and avoids stress concentration; further improves the bearing performance. service life.

The two ends between the inner ring 1 and the outer ring 3 are provided with a sealing ring 6; and the cavity formed between the inner ring 1, the rolling element 2, the outer ring 3 and the sealing ring 6 is filled with grease; when the bearing is high-speed During operation, the lubrication between the rolling elements 2, the inner ring 1, and the outer ring 3 greatly reduces the mutual work friction, thereby increasing the service life of the bearing.

The hardness of the rolling element 2 is 61HRC; the filling amount of the lubricating oil is 35%.

The groove diameter differences between the rolling element positioning grooves 4 are all less than 0.004mm; and the axial clearance of the bearing is 0.004mm, and the radial clearance of the bearing is 0.002mm.

The contact angle of the bearing is 30°.

Specific implementation mode two:

As shown in Figures 1, 4 and 5, a double row angular contact ball bearing includes an inner ring 1, rolling elements 2 and an outer ring 3, wherein the rolling elements 2 are provided with two rows, and the rolling elements 2 are arranged in the inner Between the ring 1 and the outer ring 3; the inner side of the outer ring 3 is provided with a double-row rolling element positioning groove 4, and the outer side of the inner ring 1 is correspondingly provided with a double-row rolling element rolling groove 5; wherein the rolling element 2 and the rolling element positioning groove 4 match.

The rolling element positioning groove 4 inside the outer ring 3 is evenly distributed; so that the force between the two rows of rolling elements 2 is always relatively uniformly distributed, which improves the balance of the load and avoids stress concentration; further improves the use of the bearing. life.

The two ends between the inner ring 1 and the outer ring 3 are provided with a sealing ring 6; and the cavity formed between the inner ring 1, the rolling element 2, the outer ring 3 and the sealing ring 6 is filled with grease; when the bearing is high-speed During operation, the lubrication between the rolling elements 2, the inner ring 1, and the outer ring 3 greatly reduces the mutual work friction, thereby increasing the service life of the bearing.

The hardness of the rolling element 2 is 68HRC.

The filling amount of the lubricating oil is 25%.

The groove diameter differences between the rolling element positioning grooves 4 are all less than 0.006mm; and the axial clearance of the bearing is 0.02mm, and the radial clearance of the bearing is 0.01mm.

The contact angle of the bearing is 32°.

The utility model provides a double-row angular contact ball bearing. The bearing adopts a split inner ring and an outer ring, which greatly improves the assembly efficiency; makes the force between the two rows of rolling bodies always maintain a relatively uniform distribution, and improves the load capacity. Balanced and consistent force, avoiding stress concentration; greatly improving bearing reliability. And the outer side of the inner ring or the inner side of the outer ring adopts the positioning groove of the rolling body, which ensures the speed consistency of the two rows of rolling bodies of the bearing when they rotate, thereby reducing the speed difference between the two rows of bearing rolling bodies and improving the utilization rate of the bearing; The sliding friction of rolling elements damages the working surface, which greatly improves the service life of the bearing.

The utility model increases the contact area between the rolling body and the bearing body (the outer side of the inner ring or the inner side of the outer ring), so that the axial load force is strong, the precision is high, the concentricity consistency is strong, the assembly performance is good, the clearance adjustment can be omitted, and the weight Lightweight, compact structure, large load capacity, easy adjustment, good stability, grease lubrication to reduce friction, etc.; greatly improve its service life, can be used in precision ball screws, gearboxes and various shafts, easy to popularize and apply.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the industry should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (9)

1. A double-row angular contact ball bearing, comprising an inner ring, a rolling body and an outer ring, wherein the rolling body is provided with two rows, and the rolling body is arranged between the inner ring and the outer ring; it is characterized in that: the There are double-row rolling element positioning grooves on the outer side of the inner ring, and double-row rolling element rolling grooves on the inner side of the outer ring; Or the inner side of the outer ring is provided with double-row rolling element positioning grooves, and the outer side of the inner ring is correspondingly provided with double-row rolling element rolling grooves. 2 . The double row angular contact ball bearing according to claim 1 , wherein the rolling elements are matched with the positioning grooves of the rolling elements. 3 . 3. A double row angular contact ball bearing according to claim 1, characterized in that: the rolling element positioning grooves on the outer side of the inner ring or the inner side of the outer ring are evenly distributed. 4 . The double row angular contact ball bearing according to claim 1 , wherein the hardness of the rolling elements is 61-68 HRC. 5. A double row angular contact ball bearing according to claim 1, characterized in that: both ends of the inner ring and the outer ring are provided with sealing rings. 6 . The double row angular contact ball bearing according to claim 5 , wherein the cavity formed between the inner ring, the rolling elements, the outer ring and the sealing ring is filled with lubricating grease. 7. A double row angular contact ball bearing according to claim 6, characterized in that: the filling amount of the lubricating oil is 25%-35%. 8. A double-row angular contact ball bearing according to claim 1, characterized in that: the difference in groove diameter between the positioning grooves of the rolling elements is less than 0.004mm-0.006mm; and the axial clearance of the bearing is 0.004～0.02mm, the radial clearance of the bearing is 0.002～0.01mm. 9. A double row angular contact ball bearing according to claim 1, characterized in that: the contact angle of the bearing is 15°-60°.