CN216842726U - Sealing ball bearing for automobile tension wheel - Google Patents
Sealing ball bearing for automobile tension wheel Download PDFInfo
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- CN216842726U CN216842726U CN202220167303.2U CN202220167303U CN216842726U CN 216842726 U CN216842726 U CN 216842726U CN 202220167303 U CN202220167303 U CN 202220167303U CN 216842726 U CN216842726 U CN 216842726U
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- inner ring
- ball bearing
- lip
- bearing
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Abstract
The utility model relates to a bearing field specifically discloses a sealed ball bearing for car take-up pulley. The sealed ball bearing comprises an inner ring, an outer ring, a rolling body and a retainer, wherein an installation space is formed between the inner ring and the outer ring, and the rolling body and the retainer are arranged in the installation space; the rolling body and the retainer are positioned between the two sealing covers; the sealing cover is connected with the outer ring and synchronously rotates, a sealing lip is arranged on the inner edge of the sealing cover, and a gap is reserved between the sealing lip and the inner ring. The sealing cover and the inner ring in the sealing ball bearing are in a non-contact type, so that the friction between the sealing cover and the inner ring during high-speed operation can be avoided, the friction torque of the bearing during operation is reduced, the stability of the bearing during operation under high-speed working conditions such as an automobile tension wheel is improved, and the service life is prolonged.
Description
Technical Field
The utility model relates to a bearing field, concretely relates to car is sealed ball bearing for take-up pulley.
Background
The bearing is used as an important supporting and transmission part in the mechanical field, and different requirements can be provided for the performance of the same type of bearing according to the use working condition of the bearing. The high-speed working condition is one of common special working conditions, such as a bearing for an automobile engine, and the rotating speed can reach more than ten thousand revolutions per minute. The high-speed working condition requires that the bearing has lower friction torque and has higher requirements on the sealing performance of the bearing. The utility model aims at providing a sealed ball bearing suitable for high-speed operating mode such as car take-up pulley promptly.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a car is sealed ball bearing for take-up pulley, sealed lid and inner circle be non-contact, and sealed lid and inner circle friction when can avoiding high-speed operation reduce bearing moving friction torque, and then improve the bearing moving stability under high-speed operating mode such as car take-up pulley to improve life.
In order to solve the technical problem, the utility model provides a technical scheme as follows: a sealed ball bearing for an automobile tension pulley comprises an inner ring, an outer ring, a rolling body and a retainer, wherein an installation space is formed between the inner ring and the outer ring, and the rolling body and the retainer are arranged in the installation space;
the rolling body and the retainer are positioned between the two sealing covers; the sealing cover is connected with the outer ring and synchronously rotates, a sealing lip is arranged on the inner edge of the sealing cover, and a gap is reserved between the sealing lip and the inner ring.
The sealing cover can prevent external impurities from entering the mounting space, and abrasion of the rolling body is reduced. Meanwhile, because a gap is directly reserved between the sealing lip and the inner ring, namely the sealing cover and the inner ring are in non-contact, the friction between the sealing cover and the inner ring during high-speed operation can be avoided, the friction torque of the bearing during operation is reduced, the stability of the bearing during operation under high-speed working conditions such as an automobile tension wheel and the like is improved, and the service life is prolonged.
Preferably, the clearance between the sealing lip and the inner ring is 0.2 mm-0.5 mm.
Preferably, the sealing lip of the inner edge of the sealing cover comprises an inner lip and an outer lip, and a grease injection area is formed between the inner lip and the outer lip.
During operation, lubricating grease is filled in the grease injection area, so that impurities are prevented from entering from a gap between the sealing lip and the inner ring, and the sealing effect is guaranteed.
Preferably, the inner ring and the outer ring are respectively provided with two channels, the channels of the inner ring and the channels of the outer ring correspond to each other one by one, and the rolling bodies are also divided into two groups to form a double-row form, so that the bearing capacity is improved.
Preferably, the outer side surface of the inner ring comprises a sealing section corresponding to the sealing lip, and the sealing section is a cylindrical surface.
In the existing common bearing structure, in order to be better matched with the sealing lip, the sealing section can be provided with a groove, and the sealing lip part extends into the groove. This application replaces the recess with the face of cylinder, can be convenient for the processing of seal segment, improves the machining precision of seal segment to the clearance size between accurate control seal lip and the inner circle.
Preferably, the inner ring is provided with an inner ring channel, the section curvature radius of the inner ring channel is R1, the outer ring is provided with an outer ring channel, the section curvature radius of the outer ring channel is R2, and the diameter of the rolling element is D, the rolling element has the following components: r1=0.52~0.53D, R2=0.53~ 0.54D.
Compare with current bearing structure, the radius of curvature increase of channel cross-section in this application, the space increase between inner circle channel and the outer lane channel, the grease of being convenient for gets into, improves lubricated and radiating effect. Meanwhile, the envelope surface of the rolling body is reduced by the channel, and the running friction torque of the bearing can be effectively reduced.
Drawings
FIG. 1 is a half sectional view of a sealed ball bearing for an automobile tensioner according to the present embodiment;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic structural diagram of the sealing cover and the inner ring in the sealing ball bearing for the automobile tension pulley according to the embodiment;
fig. 4 is an exploded view showing the relative positional relationship between the inner ring, the outer ring, and the rolling elements in the ball seal bearing for an automobile tensioner according to the present embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
As shown in fig. 1 and 2, the sealed ball bearing for the automobile tension pulley comprises an inner ring 1, an outer ring 3, rolling bodies 5 and a retainer, wherein an installation space 4 is formed between the inner ring 1 and the outer ring 3, and the rolling bodies 5 and the retainer are arranged in the installation space 4. The inner ring 1 and the outer ring 3 are respectively provided with two channels, the channels of the inner ring 1 and the channels of the outer ring 3 are in one-to-one correspondence, the rolling bodies 5 are also divided into two groups, and an angular contact mode is adopted between the rolling bodies 5 and the channels, so that a double-row angular contact form is formed, the radial bearing capacity can be improved, and the bidirectional axial bearing capacity is realized.
As shown in fig. 4, when the radius of curvature of the cross section of the inner raceway groove 12 is R1, the radius of curvature of the cross section of the outer raceway groove 31 is R2, and the diameter of the rolling element 5 is D, there are: r1=0.52~0.53D, R2=0.53~ 0.54D. Compared with the existing bearing structure, the curvature radius of the cross section of the channel is increased, the space between the inner ring channel 12 and the outer ring channel 31 is increased, lubricating grease can enter conveniently, and the lubricating and heat dissipation effects are improved. Meanwhile, the envelope surface of the rolling body 5 by the channel is reduced, so that the friction torque of the bearing in operation can be effectively reduced, and the heat generated by friction between the rolling body 5 and the channel is reduced.
As shown in fig. 1 and 2, the rolling bearing device further comprises two sealing covers 212, the rolling bodies 5 and the cage are located between the two sealing covers 212, and the sealing covers 212 are connected with the outer ring 3 and rotate synchronously. The inner edge of the sealing cover 212 is provided with a sealing lip, a gap is reserved between the sealing lip and the inner ring 1, and the gap between the sealing lip and the inner ring 1 is 0.2 mm-0.5 mm. Specifically, the inner side of the outer ring 3 is provided with a mounting groove, and the sealing cover 212 is embedded into the sealing groove and clamped with the outer ring 3.
The provision of the sealing cover 212 prevents foreign substances from entering the installation space 4, and reduces wear of the rolling bodies 5. Meanwhile, because a gap is directly reserved between the sealing lip and the inner ring 1, namely the sealing cover 212 and the inner ring 1 are in a non-contact mode, friction between the sealing cover 212 and the inner ring 1 during high-speed operation can be avoided, the friction torque of the bearing during operation is reduced, the stability of the bearing during operation under high-speed working conditions such as an automobile tension wheel is improved, and the service life is prolonged.
As shown in fig. 3, further, the sealing lip of the inner edge of the sealing cover 212 includes an inner lip 211 and an outer lip 212, and a grease injection region 22 is formed between the inner lip 211 and the outer lip 212. During operation, grease is filled in the grease injection area 22, so that impurities are prevented from entering from a gap between the sealing lip and the inner ring 1, and the sealing effect is guaranteed.
As shown in fig. 3 and 4, further, the outer side surface of the inner ring 1 includes a sealing section 11 corresponding to the sealing lip, and the sealing section 11 is a cylindrical surface. In the existing common bearing structure, in order to better match with the sealing lip, the sealing segment 11 is provided with a groove, and the sealing lip partially extends into the groove. This application replaces the recess with the face of cylinder, can be convenient for seal segment 11's processing, improves seal segment 11's machining precision to the clearance size between accurate control seal lip and the inner circle 1.
In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (6)
1. A sealed ball bearing for an automobile tension pulley comprises an inner ring, an outer ring, a rolling body and a retainer, wherein an installation space is formed between the inner ring and the outer ring, and the rolling body and the retainer are arranged in the installation space; the method is characterized in that:
the rolling body and the retainer are positioned between the two sealing covers; the sealing cover is connected with the outer ring and synchronously rotates, a sealing lip is arranged on the inner edge of the sealing cover, and a gap is reserved between the sealing lip and the inner ring.
2. The sealed ball bearing of claim 1, wherein: the clearance between the sealing lip and the inner ring is 0.2 mm-0.5 mm.
3. The sealed ball bearing of claim 1, wherein: the sealing lip of the inner edge of the sealing cover comprises an inner lip and an outer lip, and a grease injection area is formed between the inner lip and the outer lip.
4. The sealed ball bearing of claim 1, wherein: the inner ring and the outer ring are respectively provided with two channels.
5. The sealed ball bearing of claim 1, wherein: the outer side surface of the inner ring comprises a sealing section corresponding to the sealing lip, and the sealing section is a cylindrical surface.
6. The sealed ball bearing of any one of claims 1-5, wherein: the inner ring on be equipped with the inner circle channel, the section curvature radius of inner circle channel be R1, the outer lane on be equipped with the outer lane channel, the section curvature radius of outer lane channel be R2, the diameter of rolling element is D, then has: r1=0.52~0.53D, R2=0.53~ 0.54D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220167303.2U CN216842726U (en) | 2022-01-21 | 2022-01-21 | Sealing ball bearing for automobile tension wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220167303.2U CN216842726U (en) | 2022-01-21 | 2022-01-21 | Sealing ball bearing for automobile tension wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216842726U true CN216842726U (en) | 2022-06-28 |
Family
ID=82086363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220167303.2U Active CN216842726U (en) | 2022-01-21 | 2022-01-21 | Sealing ball bearing for automobile tension wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216842726U (en) |
-
2022
- 2022-01-21 CN CN202220167303.2U patent/CN216842726U/en active Active
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