CN217784020U - Four-row hub bearing - Google Patents

Abstract

The utility model discloses a four-row hub bearing, including inner circle, outer lane, rolling element and holder, be equipped with two raceways and two raceways on the relative face of bearing inner circle, outer lane, two raceways set up the both ends of being close to the bearing, two raceways set up between two raceways, the setting is interior raceway, interior raceway in the inner circle, sets up outer raceway, outer raceway in the outer lane, the rolling element is including setting up tapered roller in the raceway and the ball of setting in the raceway, tapered roller and interior raceway, outer raceway are the line and connect the department, the ball is the point contact with interior raceway, outer raceway, the both ends of bearing still are equipped with seal assembly. By adopting the scheme, when the hub bearing receives the axial force, the tapered rollers and the balls are simultaneously stressed to bear larger axial force, two rows of balls in the bearing improve the bearing performance of the hub bearing, and the moment rigidity of the hub bearing is also improved.

Description

Four row hub bearing

technical field

The utility model relates to a four-row hub bearing.

Background technique

Hub bearings are parts used at the axles of automobiles to bear weight and provide precise guidance for the transmission of the hubs. During the driving process of the car, the hub bearings must not only bear axial force, radial force, but also withstand the bending formed when the car turns. Torque effect, moment rigidity significantly affects the driving comfort and steering stability of the car, and low moment performance can also significantly reduce energy consumption. For large vehicles, high load capacity is particularly important, and moment rigidity cannot be ignored. Existing The wheel hub bearing structure has paired angular contact ball bearings and paired double-row tapered roller bearings. The paired double-row angular contact ball bearings have certain restrictions on the moment rigidity within a certain support span range, and the load-carrying capacity is also limited. It is not as strong as a roller bearing, and although the paired double-row tapered roller bearing has high rigidity and high load capacity, the friction loss is relatively large, which is not conducive to reducing the torque.

Utility model content

In view of the deficiencies in the prior art, the purpose of the utility model is to provide a four-row wheel hub bearing, so as to improve the bearing bearing greater axial force and enhance the bearing stability.

In order to achieve the above purpose, the utility model provides the following technical solution: a four-row hub bearing, including an inner ring, an outer ring, rolling elements and a cage, and two rows of The raceway and two rows of raceways, the two rows of raceways are arranged at both ends close to the bearing, the two rows of raceways are arranged between the two raceways, and the inner raceway is arranged on the inner ring, The inner raceway is set on the outer ring as the outer raceway and the outer raceway. The rolling elements include tapered rollers arranged in the raceway and balls arranged in the raceway. The tapered rollers and the inner raceway and the outer raceway The raceways are all line joints, the balls are in point contact with the inner raceway and the outer raceway, and the two ends of the bearing are also provided with sealing components.

As a further improvement of the utility model, the sealing assembly includes a sealing ring and a sealing cover rigidly connected to the inner ring, the sealing ring is a frame with an L-shaped axial section, and the frame is wrapped with an elastic member, so The end of the elastic member away from the outer ring is provided with an elastic lip, the frame is in interference fit with the outer ring, the elastic lip is in interference fit with the sealing cover, and the sealing cover is also provided with a flange that fits in a gap with the frame.

As a further improvement of the utility model, the elastic lip includes a first elastic lip, a second elastic lip, and a third elastic lip, both of the first elastic lip and the second elastic lip are in interference fit with the sealing cover, and the first elastic lip Three elastic lips have an interference fit with the flange.

As a further improvement of the utility model, the included angle between the center of the ball and the contact point between the ball and the inner channel and the radial line of the inner ring passing through the center of the ball is 30°~40°.

Beneficial effects of the utility model: adopting the above scheme, when the hub bearing receives the axial force, the tapered rollers and the balls are stressed at the same time to withstand a greater axial force, and the two rows of balls in the bearing improve the bearing capacity of the hub bearing. The load-bearing performance is improved, and the moment rigidity of the hub bearing is also improved.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model;

FIG. 2 is a partially enlarged schematic diagram of part A of FIG. 1 .

Reference numerals: 1, inner ring; 2, outer ring; 3, tapered roller; 4, ball; 5, frame; 6, elastic member; 7, first elastic lip; 8, second elastic lip; 9, the second Three elastic lips; 10, inner raceway; 11, inner raceway; 12, outer raceway; 13, outer raceway; 14, cage.

Detailed ways

The utility model will be described in further detail below in conjunction with the embodiments provided by the accompanying drawings.

As shown in Figure 1-2, a four-row hub bearing includes an inner ring, an outer ring, rolling elements and a cage, and two rows of raceways and two rows of grooves are provided on the opposite surfaces of the inner ring and the outer ring of the bearing. The two rows of raceways are arranged near the two ends of the bearing, the two rows of raceways are arranged between the two raceways, and the inner raceways and inner grooves on the inner ring are arranged on the outer The ring is an outer raceway and an outer raceway. The rolling elements include tapered rollers arranged in the raceway and balls arranged in the groove. The diameter of the tapered rollers is larger than that of the balls. The tapered rollers Both the inner raceway and the outer raceway are line joints, the balls are in point contact with the inner raceway and the outer raceway, and the two ends of the bearing are also equipped with sealing components. Compared with the existing The advanced technology can withstand greater axial force. The axial force of the hub bearing in actual use acts on various parts of the hub bearing. The different diameters of the tapered rollers and balls can better adapt to the axial force of the actual operation. force, to prevent the different degrees of wear of the tapered rollers and balls due to the different axial forces received by each part, and to ensure the normal operation of the hub bearing. Due to space constraints, the existing double-row tapered roller bearings for some heavy-duty trucks cannot meet their load-bearing requirements. Adding two rows of balls improves the load-carrying performance of the hub bearing and also improves the moment rigidity of the hub bearing. The row of rolling elements also enhances the stability of the bearing load of the hub, so that the tapered roller bearing will not be unbalanced and cause stress concentration.

The sealing assembly includes a sealing ring and a sealing cover rigidly connected to the inner ring. The sealing ring is an L-shaped skeleton in an axial section, and an elastic member is wrapped on the skeleton, and the end of the elastic member is away from the outer ring. An elastic lip is provided, the frame and the outer ring are in interference fit, the elastic lip is in interference fit with the sealing cover, and the sealing cover is also provided with a flange that fits in a gap with the frame, and the elastic lip includes a first elastic lip, the second elastic lip, and the third elastic lip, the first elastic lip and the second elastic lip are in interference fit with the sealing cover, and the third elastic lip is in interference fit with the flange. The use environment of the hub bearing is usually related to the weather or road environment. In order to prevent the outside muddy water, dust, sand and other pollutants from entering the inside of the bearing, a sealing component is set to seal the bearing. The interference between the sealing cover and the elastic part is set. Multiple elastic lips are used for sealing, which can effectively prevent the bearing from peeling off due to contact with pollutants inside the bearing and ensure the normal operation of the bearing.

The included angle between the center of the ball and the contact point between the ball and the inner channel and the radial line of the inner ring passing through the center of the ball is 30°~40°. The advantage of this setting is that the ball can move smoothly Roll in the raceway.

The above descriptions are only preferred implementations of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present utility model all belong to the protection scope of the present utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (4)

1. The utility model provides a four-row wheel hub bearing, includes inner circle, outer lane, rolling element and holder, its characterized in that, be equipped with two raceways and two raceways on the relative face of inner circle, outer lane, two raceways set up the both ends of being close to the bearing, two raceways set up between two raceways, the setting is interior raceway, interior channel in the inner circle, and the setting is outer raceway, outer channel on the outer lane, the rolling element is including setting up tapered roller in the raceway and the ball of setting in the channel, tapered roller and interior raceway, outer raceway are the line and connect the department, the ball is the point contact with interior channel, outer channel, the both ends of bearing still are equipped with seal assembly.

2. The four-row hub bearing according to claim 1, wherein the seal assembly comprises a seal ring and a seal cover rigidly connected to the inner ring, the seal ring is a framework with an L-shaped axial cross section, the framework is wrapped with an elastic member, an elastic lip is arranged at one end of the elastic member away from the outer ring, the framework is in interference fit with the outer ring, the elastic lip is in interference fit with the seal cover, and a flange in clearance fit with the framework is further arranged on the seal cover.

3. The quad hub bearing of claim 2, wherein the resilient lips comprise a first resilient lip, a second resilient lip, and a third resilient lip, the first and second resilient lips each having an interference fit with the seal cover, and the third resilient lip having an interference fit with the flange.

4. A four row hub bearing according to claim 1, wherein the angle between the centre of sphere of the balls and the line of contact points of the balls with the inner channel and the radial line of the inner race passing through the centre of sphere of the balls is between 30 ° and 40 °.

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