CN214465574U

CN214465574U - Double-row outer-ring-free bearing with combined middle clamp spring

Info

Publication number: CN214465574U
Application number: CN202120563288.9U
Authority: CN
Inventors: 杨晓刚; 周军; 田凯
Original assignee: CHANGZHOU CRONOS SPECIAL BEARING MANUFACTURE CO LTD
Current assignee: CHANGZHOU CRONOS SPECIAL BEARING MANUFACTURE CO LTD
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-10-22
Anticipated expiration: 2031-03-18

Abstract

The utility model relates to a double-row no-outer-ring bearing with a combined middle snap spring, which comprises an outer ring, wherein two outer raceways are arranged on the outer ring, and cylindrical roller groups are uniformly arranged in the two outer raceways; the middle clamp spring is arranged between the cylindrical rollers of the two adjacent roller paths; the middle clamp spring comprises a clamp ring body and a clamp spring body, a circle of groove is formed in the surface of the clamp ring body, the clamp spring body is of a C-shaped structure and is clamped in the groove, and the outer ring of the clamp spring body protrudes out of the groove to form a clamping portion. The combined middle clamp spring with the brand-new design is adopted, the two clamp spring bodies are clamped in the grooves of the retainer ring body, so that the retainer ring body and the clamp spring bodies are not easy to axially separate, and the axial shock resistance is improved.

Description

Double-row outer-ring-free bearing with combined middle clamp spring

Technical Field

The utility model relates to a bearing field, concretely relates to double-row no outer lane bearing of jump ring in middle of area combination formula.

Background

For reducing among the planetary reducer, the gear passes through to take outer lane bearing to install on the cantilever beam, has the problem that manufacturing cost is high, assembly cost is high, for overcoming this problem, the applicant has carried out patent application earlier, the patent name: a non-outer-ring bearing, a planetary reduction mechanism and a planetary gear installation method; patent application No.: 2021203654718, in the scheme of the prior patent application, the snap connection between the gear is realized by the snap spring, and the two sides of the snap spring are provided with check rings for preventing the roller from being in frictional contact with the snap spring.

The scheme of prior application adopts the mode of "jump ring + two retaining rings", owing to there are three parts, the jump ring respectively with both sides retaining ring cooperation, when the axial atress is great, there is cracked risk retaining ring and jump ring, influences the life of bearing.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the double-row outer-ring-free bearing with the combined middle clamp spring is provided, and the problem that the service life of the traditional double-row outer-ring-free bearing in a planetary gear speed reducing mechanism is short is solved.

The utility model provides a technical scheme that its technical problem adopted is:

the double-row outer ring-free bearing with the combined middle clamp spring comprises

The outer ring is provided with two outer raceways, and cylindrical roller groups are arranged in the two outer raceways;

the middle clamp spring is arranged between the cylindrical rollers of the two adjacent roller paths;

the middle clamp spring comprises a clamp ring body and a clamp spring body, a circle of groove is formed in the surface of the clamp ring body, the clamp spring body is of a C-shaped structure and is clamped in the groove, and the outer ring of the clamp spring body protrudes out of the groove to form a clamping portion.

Furthermore, inner conical surfaces are formed on two sides of the retainer ring body;

the end face of the cylindrical roller forms a contact curved surface to be matched with the inner conical surface.

Further, the retainer ring body is made of bearing steel; the clamp spring body is made of spring steel.

Furthermore, the clamp spring further comprises an outer sleeve, the double-row outer-ring-free bearing is arranged in the outer sleeve, and the clamp spring body is tightly tensioned in an inner hole of the outer sleeve.

Further, the curvature radius R of the contact curved surface, the diameter D of the cylindrical roller;

and R is (8-12) D.

The utility model has the advantages that:

the utility model provides a biserial does not have outer lane bearing has adopted a modular middle jump ring of brand-new design, through two jump ring body joints in the recess of retaining ring body, makes difficult axial break away from between retaining ring body and the jump ring body, has promoted axial shock resistance, makes the axial shock resistance reinforcing of bearing, makes planetary gear can be on the bearing high-speed stable rotation.

Drawings

The present invention will be further explained with reference to the accompanying drawings.

FIG. 1 is a schematic view of a plain outer race bearing packed within a housing;

FIG. 2 is a schematic view of a combined intermediate clamp spring;

FIG. 3 is a schematic view of a planetary reduction mechanism;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic illustration of a planet gear mounted to a cantilever beam by a non-outer race bearing;

2, a middle clamp spring 21, a retainer ring body 22 and a clamp spring body;

31. an inner ring, 32, an outer sleeve;

4. planet carrier, 41, cantilever beam, 42, planetary gear, 43, circlip.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

As shown in FIG. 1 and FIG. 2, a double-row outer-ring-free bearing with a combined middle clamp spring comprises

the middle clamp spring 2 is arranged between the cylindrical rollers of the two adjacent roller paths;

the middle clamp spring 2 comprises a retainer ring body 21 and a clamp spring body 22, a circle of groove is formed in the surface of the retainer ring body 21, the clamp spring body 22 is of a C-shaped structure, the clamp spring body 22 is clamped in the groove, and the outer ring of the clamp spring body 22 protrudes from the groove to form a clamping portion.

Specifically, as an optional implementation manner in this embodiment, both sides of the retainer ring body 21 form inner conical surfaces; the end face of the cylindrical roller forms a contact curved surface to be matched with the inner conical surface.

The taper angle of the inner conical surface, not shown in the figure, and the contact surface is matched with the conical surface, so that the contact elliptical area of the end surface contact of the roller can be increased, and the contact stress and the effective lubrication are reduced.

Specifically, as an optional implementation manner in this embodiment, the retainer ring body 21 is made of bearing steel; the clamp spring body 22 is made of spring steel. The hardness and the wear resistance are improved by adopting the two materials.

Specifically, as an optional implementation manner in this embodiment, the clamp spring further includes an outer sleeve 32, the double-row outer-ring-free bearing is disposed in the outer sleeve 32, and the clamp spring body 22 is tensioned in an inner hole of the outer sleeve 32.

The outer sleeve 32 is made of plastic materials, and the packaging cost is reduced.

Specifically, as an optional implementation manner in this embodiment, the radius of curvature R of the contact curved surface, the diameter D of the cylindrical roller; and R is (8-12) D.

After the bearing sleeve is sleeved with the outer sleeve 32, the bearing sleeve can be shipped and transported, and is taken out and installed in the planetary reduction mechanism after reaching the destination.

As shown in fig. 3 to 5, a planetary reduction mechanism includes a carrier 4; the entire planet carrier 4 is mounted for rotation in a large ring gear.

The planet gear 42 is installed on the cantilever beam 41 through the double-row outer-ring-free bearing, the elastic retainer ring 43 is clamped on the cantilever beam 41 to limit the movement of the inner ring 31, a middle clamping groove formed in the planet gear 42 is clamped with the middle clamping spring 2, so that the planet gear 42 and the middle clamping spring 2 rotate together, the two sides of the middle clamping spring 2 are respectively in friction fit with the cylindrical rollers, and the shock resistance and the friction resistance of the middle clamping spring 2 enable the planet gear 42 to operate efficiently and stably.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A double-row outer ring-free bearing with a combined middle clamp spring is characterized by comprising

2. The double-row outer-ring-free bearing with the combined middle clamp spring as claimed in claim 1,

inner conical surfaces are formed on two sides of the retainer ring body;

3. The double-row outer-ring-free bearing with the combined middle clamp spring as claimed in claim 1,

the retainer ring body is made of bearing steel; the clamp spring body is made of spring steel.

4. The double-row outer-ring-free bearing with the combined intermediate clamp spring as claimed in claim 1, further comprising an outer sleeve, wherein the double-row outer-ring-free bearing is arranged in the outer sleeve, and the clamp spring body is tensioned in an inner hole of the outer sleeve.

5. The double-row outer-ring-free bearing with the combined middle clamp spring as claimed in claim 2,

the curvature radius R of the contact curved surface and the diameter D of the cylindrical roller;

and R is (8-12) D.