Inflatable maintenance-free hub bearing

Abstract

The utility model provides an inflatable maintenance-free hub bearing, which comprises an inner ring, two outer rings and a plurality of rollers, a raceway is formed between the outer rings and the inner ring, the inner ring comprises a first ferrule and a second ferrule which are separately arranged corresponding to the two outer rings, the first ferrule and the second ferrule are respectively provided with a notch, and the rollers are arranged on the first ferrule and the second ferrule. After the first ferrule and the second ferrule are spliced, the two notches form an air inlet hole communicated with the inner hole, inner sealing rings are arranged at the opposite ends of the two outer rings, the two inner sealing rings are arranged in a spaced mode, and the air inlet hole is formed corresponding to the spaced position of the two inner sealing rings. Aiming at the defects in the prior art, the utility model provides the inflatable maintenance-free hub bearing which can be automatically inflated when a vehicle runs, ensures that the air pressure of a tire of the vehicle is stable and better adapts to road conditions.

Description

Technical Field

[0001] The utility model relates to a wheel hub bearing, in particular to an inflatable maintenance-free wheel hub bearing. Background Art

[0002] The wheel hub bearing is an important component of the vehicle. Its main function is to support the wheel and reduce the friction resistance between the wheel and the ground, helping the vehicle to run more smoothly. The wheel hub bearing usually includes an outer ring, an inner ring and several rollers. A raceway for the rollers to roll is formed between the outer ring and the inner ring. Sealing rings are also provided on both sides of the raceway to ensure sealing. An inner hole is formed on the inner ring for the axle to pass through and connect. The wheel hub bearing needs to be optimized according to the specific type of vehicle used. For example, when the wheel hub is used on an off-road vehicle, the off-road vehicle often needs to face various harsh road conditions in the wild during driving. This makes it difficult to maintain stable tire pressure during driving. If the pressure is too low, it will seriously affect the driving performance of the off-road vehicle. Maintenance-free mainly requires long-term stable work, which leads to the need for certain improvements to this type of wheel hub bearing to better adapt to off-road conditions. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides an inflatable maintenance-free wheel hub bearing which can automatically inflate while the vehicle is traveling, ensures stable tire pressure, and better adapts to road conditions.

[0004] To achieve the above-mentioned purpose, the utility model provides an inflatable maintenance-free wheel hub bearing, comprising an inner ring, two outer rings and a plurality of rollers, a raceway being formed between the outer ring and the inner ring, the inner ring comprising a first ring and a second ring separately arranged corresponding to the two outer rings, the first ring and the second ring both being provided with notches, and after the first ring and the second ring are assembled, the two notches form an air inlet hole connected to the inner hole, an inner sealing ring is provided at one end of the two outer rings facing each other, the two inner sealing rings are arranged at intervals, and the air inlet hole is provided corresponding to the interval between the two inner sealing rings.

[0005] The advantages of adopting the above technical solution are: by setting the inner ring into a first ring and a second ring, notches are set on the first ring and the second ring, and the two notches can form an air inlet hole connected to the inner hole when the two are spliced together, the pressure pump can be directly connected to the inner hole of the channel through the air inlet hole, allowing the gas from the pressure pump to pass through the shaft, bearing unit and wheel hub, and directly fill the tire with gas. When the tire pressure drops, the pressure pump will automatically start and automatically inflate the tire to maintain the stability of the air pressure in the tire, ensure the stability of the vehicle tire pressure and better adapt to off-road conditions. The air inlet hole is set in the gap between the two inner sealing rings so that after the wheel hub bearing is installed as a whole, the gas can be prevented from leaking out of the gap between the outer ring and the inner ring through the sealing rings on both sides to ensure the sealing effect.

[0006] The present invention can be further configured as follows: the first ferrule includes an inserting portion, a mounting groove and a first hook portion; the second ferrule includes a second hook portion; the second ferrule can be fitted onto the inserting portion; the mounting groove is provided on the inserting portion and extends to the end thereof; the notch of the first ferrule is provided corresponding to the mounting groove; and the first hook portion and the second hook portion are provided corresponding to the notches of the first ferrule and the second ferrule respectively, and are both bent toward the inner hole.

[0007] Through further settings, an inserting portion, a mounting groove and a first hook portion are provided on the first ring, and a second hook portion is provided on the second ring, so that the second ring is sleeved on the inserting portion of the first ring, and then the mounting groove is provided on the inserting portion, and the notch of the first ring corresponds to the position of the mounting groove, and the first hook portion and the second hook portion respectively correspond to the notch positions of the rings where they are located. During installation, when the second ring is sleeved on the inserting portion of the first ring, the second hook portion can cooperate with the mounting groove to guide the installation position, so that it is convenient to install it to the position where the first hook portion and the second hook are in contact.

[0008] The utility model can be further configured to include a retaining spring, wherein the first hook portion and the second hook portion can abut against each other after the first ferrule and the second ferrule are assembled, and the retaining spring is sleeved on the first hook portion and the second hook portion.

[0009] Through further configuration, an additional retaining spring is provided so that the retaining spring can be fitted onto the first hook and the second hook after the first ferrule and the second ferrule are assembled, thereby providing positioning and ensuring the stability of the product.

[0010] The present invention can be further configured as follows: a first groove portion is provided at the inner hole of the first ferrule, the first groove portion is provided at a position away from the insertion portion, an inclined portion and a second groove portion are provided on the second ferrule, the inclined portion is provided at the end of the second ferrule away from its notch, and the inclined portion is gradually larger toward the outside, the second groove portion is provided on the inclined portion, and shaft sealing rings are provided in both the first groove portion and the second groove portion.

[0011] Through further settings, a first groove portion and a second groove portion are respectively provided at the inner hole position of the first ring and the inner hole position of the second ring, and a shaft sealing ring is provided in the two groove portions. The two shaft sealing rings located at both ends of the inner hole of the inner ring cooperate with the core shaft to form a seal, thereby preventing gas from leaking from the gap between the core shaft and the inner ring, thereby ensuring the sealing effect.

[0012] The present invention can be further configured as follows: a bracket connecting the inner sealing ring and the corresponding outer ring is provided between the inner sealing ring and the corresponding outer ring.

[0013] By further arranging a bracket connecting the inner sealing ring and the corresponding outer ring, support can be provided for the inner sealing ring, thereby ensuring the stability of the wheel hub bearing during operation and ensuring the sealing effect.

[0014] The utility model can be further configured as follows: an outer sealing ring is provided at the other end of the outer ring, and the outer sealing ring and the outer ring are spaced apart.

[0015] By further setting, an outer sealing ring is provided at the other end of the outer ring to provide a sealing effect for the hub bearing, and the outer sealing ring and the outer ring are spaced apart to avoid collision between the outer sealing ring and the roller or the roller retainer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0017] Figure 2 For the embodiment of the utility model Figure 1 Enlarged view of part a;

[0018] Figure 3 For the embodiment of the utility model Figure 1 Enlarged view of part b;

[0019] Figure 4 A schematic diagram of the gas flow direction in the use state of the embodiment of the utility model;

[0020] Among them: inner ring 1; first ferrule 11; insertion portion 111; mounting groove 112; first hook portion 113; first groove portion 114; second ferrule 12; second hook portion 121; inclined portion 122; second groove portion 123; air inlet 13; outer ring 2; roller 3; inner sealing ring 4; retaining ring 5; shaft sealing ring 6; bracket 7; outer sealing ring 8. DETAILED DESCRIPTION

[0021] The utility model is an embodiment of an inflatable maintenance-free hub bearing. Figure 1-4 As shown: it includes an inner ring 1, two outer rings 2 and a plurality of rollers 3. A raceway is formed between the outer ring 1 and the inner ring 2. The inner ring 1 includes a first ring 11 and a second ring 12 separately arranged corresponding to the two outer rings 2. The first ring 11 and the second ring 12 are both provided with notches, and after the first ring 11 and the second ring 12 are assembled, the two notches form an air inlet 13 connected to the inner hole. An inner sealing ring 4 is provided at the opposite end of the two outer rings 2. The two inner sealing rings 4 are arranged at intervals, and the air inlet 13 is provided corresponding to the interval between the two inner sealing rings 4.

[0022] The first ring 11 includes an inserting portion 111, a mounting groove 112 and a first hook portion 113. The second ring 12 includes a second hook portion 121. The second ring 12 can be mounted on the inserting portion 111. The mounting groove 112 is provided on the inserting portion 111 and extends to its end. The notch of the first ring 11 is provided corresponding to the mounting groove 112, and the first hook portion 113 and the second hook portion 121 are provided corresponding to the notches of the first ring 11 and the second ring 12, respectively, and are both bent toward the inner hole.

[0023] The retaining spring 5 is also included. The first hook 113 and the second hook 121 can abut against each other after the first ring 11 and the second ring 12 are assembled. The retaining spring 5 is sleeved on the first hook 113 and the second hook 121 .

[0024] A first groove portion 114 is provided at the inner hole of the first ferrule 11, and the first groove portion 114 is provided away from the insertion portion 111. An inclined portion 122 and a second groove portion 123 are provided on the second ferrule 12, and the inclined portion 122 is provided at the end of the second ferrule 12 away from its notch, and the inclined portion 122 is gradually larger toward the outside, and the second groove portion 123 is provided on the inclined portion 122. A shaft sealing ring 6 is provided in both the first groove portion 114 and the second groove portion 123.

[0025] A bracket 7 is provided between the inner sealing ring 4 and the corresponding outer ring 2 to connect the two.

[0026] An outer sealing ring 8 is provided at the other end of the outer ring 2 , and the outer sealing ring 8 is spaced apart from the outer ring 2 .

[0027] The above example is only one preferred specific example of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. An inflatable maintenance-free hub bearing comprising an inner ring, two outer rings, and a plurality of rollers, wherein a raceway is formed between the outer ring and the inner ring, and characterized in that: The inner ring includes a first ring and a second ring which are separately arranged corresponding to the two outer rings. The first ring and the second ring are both provided with notches, and after the first ring and the second ring are assembled, the two notches form an air inlet hole connected to the inner hole. An inner sealing ring is provided at one end of the two outer rings facing each other, and the two inner sealing rings are arranged at intervals. The air inlet hole is provided corresponding to the interval between the two inner sealing rings.

2. The inflatable maintenance-free hub bearing according to claim 1, characterized in that: The first ring includes an insertion part, a mounting groove and a first hook part. The second ring includes a second hook part. The second ring can be mounted on the insertion part. The mounting groove is arranged on the insertion part and extends to its end. The notch of the first ring is arranged corresponding to the mounting groove, and the first hook part and the second hook part are arranged corresponding to the notches of the first ring and the second ring respectively, and are both bent toward the inner hole.

3. The inflatable maintenance-free hub bearing according to claim 2, characterized in that: A retaining spring is included. The first hook portion and the second hook portion can abut against each other after the first ring and the second ring are assembled. The retaining spring is sleeved on the first hook portion and the second hook portion.

4. The inflatable maintenance-free hub bearing according to claim 1, 2 or 3, characterized in that: A first groove is provided at the inner hole of the first ring, and the first groove is provided at a position away from the insertion portion. An inclined portion and a second groove are provided on the second ring, and the inclined portion is provided at the end of the second ring away from its notch, and the inclined portion is gradually increased toward the outside. The second groove is provided on the inclined portion, and shaft sealing rings are provided in both the first groove and the second groove.

5. The inflatable maintenance-free hub bearing according to claim 1, 2 or 3, characterized in that: A bracket connecting the inner sealing ring and the corresponding outer ring is provided between the two.

6. The inflatable maintenance-free hub bearing according to claim 5, characterized in that: An outer sealing ring is provided at the other end of the outer ring, and the outer sealing ring is spaced apart from the outer ring.

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