CN212945510U

CN212945510U - Eccentric inner ring needle roller bearing

Info

Publication number: CN212945510U
Application number: CN202020767353.5U
Authority: CN
Inventors: 刘雄雄; 宋泽林; 文志星
Original assignee: Wuhu Zhile Bearing Co ltd
Current assignee: Wuhu Zhile Bearing Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-04-13
Anticipated expiration: 2030-05-11

Abstract

The utility model relates to an eccentric inner circle bearing: the eccentric inner ring body is internally provided with an eccentric hole, and the distance between the central axis of an eccentric inner hole of the eccentric hole and the central axis of the eccentric inner ring body is 0.8-1.5 mm. The utility model has the advantages that: the automatic production is easy to realize, the efficiency is improved, and the cost is low; the product surface compressive stress is large, and the fatigue life of the product is prolonged; the product does not need to be axially positioned after being installed, and the customer installation is convenient; the clamping height of the clamp is ensured, the clamp does not need to be disassembled, the assembling and disassembling processes are omitted, the industrial effect is obvious, the production efficiency is high, and the clamp has good practicability.

Description

Eccentric inner ring needle roller bearing

Technical Field

The utility model relates to an eccentric inner circle processing technology especially relates to an eccentric inner circle bearing.

Background

At present, the inner ring of the bearing is quenched and tempered by GCr15, and the outer circle and the inner hole are ground; the inner ring inner hole of the existing bearing with special working conditions is an eccentric inner hole, the eccentricity is 1 +/-0.02 mm, an electromagnetic centerless clamp in the bearing industry cannot process the product, and when a common inner and outer circle grinding machine is adopted for processing, the clamping is difficult, and the eccentricity is difficult to guarantee. Because the eccentricity is large, the external grinding allowance is very large, and the processing efficiency is very low. Resulting in inaccurate positioning or deformation of the article which can affect quality; and the process is loaded down with trivial details in the dismantlement process, and work load is big, influences part shaping quality and manufacturing progress.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the fixture fixing device has the advantages of simplicity and convenience in operation and stable and reliable structural equipment; the problem is solved, the operation of frock of being convenient for improves parts machining's quality and efficiency.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an eccentric inner circle bearing which characterized in that: the eccentric inner ring body is internally provided with an eccentric hole, and the distance between the central axis of an eccentric inner hole of the eccentric hole and the central axis of the eccentric inner ring body is 0.8-1.5 mm.

The utility model provides a boring grab of eccentric inner circle, includes the anchor clamps body, its characterized in that: the anchor clamps specifically include rear end connecting portion, front end clamping part, rear end connecting portion be connected with the lathe chuck to through the tight front end clamping part in built-in tensioning piece top in the lathe chuck, rear end connecting portion include chuck adapter sleeve, connect chuck adapter sleeve tip and be equipped with the partition tensioning linkage cover of gap mouth, front end clamping part including set up at the partition end of every partition tensioning linkage cover on linkage platform, set up at the arc clamp body of every linkage platform side, set up the tight arc recess of clamp at the interior bottom surface of every arc clamp body, the tight arc recess of clamp that a plurality of rings shape set up forms the tight chamber of clamp of tight work piece.

In order to be connected stably, the chuck connecting sleeve is provided with a key groove.

In order to synchronously tension, opposite tension linkage half grooves are arranged between every two gap openings of the equal-division tension linkage sleeve; two tensioning linkage half grooves form synchronous tensioning of 2 equally divided sections.

The utility model has the advantages that: the automatic production is easy to realize, the efficiency is improved, and the cost is low; the product surface compressive stress is large, and the fatigue life of the product is prolonged; the product does not need to be axially positioned after being installed, and the customer installation is convenient; the clamping height of the clamp is ensured, the clamp does not need to be disassembled, the assembling and disassembling processes are omitted, the industrial effect is obvious, the production efficiency is high, and the clamp has good practicability.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural view of the eccentric inner ring needle roller bearing of the present invention.

Fig. 2 is a cross-sectional view taken along line B-B of fig. 1.

Fig. 3 is a schematic structural view of a boring jig for eccentric inner circles of the present invention.

Fig. 4 is a perspective view of fig. 3.

Detailed Description

The terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like in the specification indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Embodiment 1, as shown in fig. 1 and 2, an eccentric inner ring needle roller bearing is characterized in that: the eccentric inner ring comprises a punched outer ring body 1, an eccentric inner ring body 2, a retainer 3 arranged between the punched outer ring body 1 and the eccentric inner ring body 2, a roller pin 4 arranged in the retainer 3 and a retainer ring 6 structure arranged at the end part of the retainer 3, wherein an eccentric hole 5 is arranged in the eccentric inner ring body 2, and the distance between the central axis of an eccentric inner hole of the eccentric hole 5 and the central axis of the eccentric inner ring body is 0.8-1.5 mm.

Embodiment 2, as shown in fig. 3 and 4, a drilling jig for an eccentric inner ring comprises a jig body, and is characterized in that: the anchor clamps specifically include rear end connecting portion, front end clamping part, rear end connecting portion be connected with the lathe chuck to through the tight front end clamping part in built-in tensioning piece top in the lathe chuck, rear end connecting portion include chuck adapter sleeve 7, connect chuck adapter sleeve 7 tip and be equipped with the partition tensioning linkage cover 9 of gap mouth 8, front end clamping part including set up linkage platform 10 on the partition end of every partition tensioning linkage cover, set up at the arc clamp 11 of every linkage platform side, set up the tight arc recess 12 of clamp of the interior bottom surface of every arc clamp, the tight arc recess of clamp that a plurality of rings set up forms the tight chamber 13 of clamp of tight work piece.

For stable connection, the chuck connecting sleeve 7 is provided with a key slot 14.

In order to synchronously tension, opposite tension linkage half grooves 15 are arranged between every two gap openings 8 of the equal-division tension linkage sleeve; two tensioning linkage half grooves form synchronous tensioning of 2 equally divided sections.

A product processed using the jig; the product has eccentric amount, high inner diameter tolerance precision and stable process; .

Optimally designing a machining method of the eccentric inner ring, and carrying out high-frequency quenching on the surface of the solid cylinder by using a product material GCr15, wherein the surface hardness is HV 700-840, the effective hardening layer depth is 0.3-0.7 mm, and the core hardness is HV 150-250; the excircle is processed by a through centerless grinding, so that the processing efficiency is high; the eccentricity of the eccentric inner hole is positioned by a high-precision eccentric fixture, and the positioning precision can reach +/-0.01 mm; the one-time clamping is completed through a combined machining process of drilling and reaming, the reaming adopts a high-precision reamer, and a self-centering technology, so that the reaming precision reaches within 0.01mm, the grinding technology is replaced, the production efficiency is improved, and the product machining precision is improved; the inner ring is subjected to induction quenching, the surface hardness of the product is HV 700-840, and the surface has very high compressive stress, particularly very high wear resistance and fatigue strength. The core part has low hardness and very good plastic deformation capability, large interference pressure is adopted when the inner ring and the shaft are assembled, and the inner ring and the shaft have very high axial retention force without axial positioning.

The above embodiments are merely to describe the preferred embodiments of the present invention, and are not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

Claims

1. The utility model provides an eccentric inner circle bearing which characterized in that: the eccentric inner ring body is internally provided with an eccentric hole, and the distance between the central axis of an eccentric inner hole of the eccentric hole and the central axis of the eccentric inner ring body is 0.8-1.5 mm.