CN112065956A

CN112065956A - Idler combination structure with axial fastening function

Info

Publication number: CN112065956A
Application number: CN202010788743.5A
Authority: CN
Inventors: 王旭兰; 仲蕾; 董江峰; 郝勇刚; 李旭东; 牛海杰; 赵斌; 李元石; 任庆霜; 张洁
Original assignee: China North Engine Research Institute Tianjin
Current assignee: China North Engine Research Institute Tianjin
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-12-11

Abstract

The invention provides an idler wheel combined structure with an axial fastening function, which comprises an idler gear, a bearing, a shaft, a check ring, a flat gasket, an elastic gasket, a copper alloy nut and a transmission plate, wherein the shaft is a stepped shaft comprising a left section and a right section; the outer end of axle has the screw thread, and cup joints plain washer, bullet gasket, copper alloy nut in proper order, and the plain washer contacts with the driving plate outside, through the tightening to copper alloy nut, fastens the idler integrated configuration. Because the inherent material characteristic of copper alloy nut itself can produce the deformation in the fastening process, the copper alloy nut after the deformation can't restore to the original condition, consequently can not slide along the screw on the axle, no matter like this whether forward rotation or reverse rotation, this idler integrated configuration can not produce the pine, effectively prevents to rotate in-process idler gear and produces the problem of becoming flexible.

Description

Idler combination structure with axial fastening function

Technical Field

The invention belongs to the technical field of internal combustion engines, and particularly relates to an idler wheel combination structure with an axial fastening function.

Background

In a diesel engine, a crankshaft drives accessories such as a camshaft, an oil pump, an oil injection pump, a PTO and the like through a transmission device, and if the center distance is large, an idler wheel combination structure is necessary. Some idler assemblies typically require tightening of the structure by a nut, but the nut may loosen and even become dangerous over time during operation.

For a long time, those skilled in the art have taken various measures to solve the problem of difficulty in fastening the idler wheel assembly structure, such as using ordinary copper nuts, adding other complicated structures, and the like. The common copper nut usually only bears a small axial force, so that the common copper nut is not suitable for products with large axial force, and other complicated structures bring difficulties to design and processing.

In order to solve the above-mentioned dilemma, it is desirable to provide an idler wheel assembly structure with an axial fastening function, so as to solve the problem of difficulty in fastening the idler wheel assembly structure.

Disclosure of Invention

In view of the above, the present invention is directed to an idler wheel assembly structure with an axial fastening function, so as to solve the problem of difficulty in fastening the idler wheel assembly structure.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

an idler wheel combined structure with an axial fastening function comprises an idler gear, a bearing, a shaft, a retainer ring, a flat gasket, an elastic gasket, a copper alloy nut and a transmission plate, wherein the shaft is a stepped shaft comprising a left section and a right section; the outer end of the shaft is provided with threads, and is sequentially sleeved with a flat gasket, an elastic gasket and a copper alloy nut, the flat gasket is contacted with the outer side of the transmission plate, and the idle wheel combined structure is fastened by screwing the copper alloy nut.

Further, the bearing is in small interference fit with the idle gear, the shaft and the bearing are in small clearance fit, and the shaft and the transmission plate are in clearance fit.

Compared with the prior art, the invention has the following advantages:

the idler wheel combined structure with the axial fastening function effectively prevents the problem that the idler gear is loosened in the rotating process, and reduces risks in engineering application; the invention is suitable for the idler wheel combination structure which is difficult to fasten, has better manufacturability, lower cost and simple structure and is easy to realize.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of an idler wheel assembly according to an embodiment of the invention.

Description of reference numerals:

1-an idler gear; 2-a bearing; 3-axis; 4-flat gasket; 5-elastic gaskets; 6-copper alloy nuts; 7-a retainer ring; 8-driving plate.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

An idler wheel combination structure with an axial fastening function is shown in figure 1 and comprises an idler gear 1, a bearing 2, a shaft 3, a retainer ring 7, a flat gasket 4, an elastic gasket 5, a copper alloy nut 6 and a transmission plate 8,

the shaft 3 is a stepped shaft comprising a left section and a right section, the idler gear 1 is installed on the left section of the shaft 3 through a bearing 2, the transmission plate 8 is installed in the middle of the shaft 3, and a counter bore matched with the step of the shaft 3 is formed in the inner side of the transmission plate 8; the outer end of the shaft 3 is provided with threads, and is sequentially sleeved with a flat gasket 4, an elastic gasket 5 and a copper alloy nut 6, the flat gasket 4 is in contact with the outer side of a transmission plate 8, and the idle wheel combined structure is fastened by screwing the copper alloy nut 6.

The bearing 2 is slightly interfered on the idle gear 1, the shaft 3 is in small clearance fit with the bearing 2, and the shaft 3 is in clearance fit with the transmission plate 8.

Due to the inherent material characteristics of the copper alloy nut 6, the copper alloy nut 6 deforms in the fastening process, and the deformed copper alloy nut 6 cannot restore to the original state and cannot slide along the thread on the shaft 3, so that the idle wheel combined structure cannot loosen in both forward rotation and reverse rotation.

The idler wheel combined structure disclosed by the invention better meets the design requirements in the practical process, and by adopting the design structure, the problem that the idler wheel combined structure can generate looseness in the rotating process is better adjusted. The idler wheel combined structure with the axial fastening function effectively prevents the problem that the idler gear is loosened in the rotating process, and reduces risks in engineering application. The invention is suitable for the idler wheel combination structure which is difficult to fasten, and has better manufacturability and lower cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An idler combination structure with axial fastening function is characterized in that: comprises an idler gear, a bearing, a shaft, a retainer ring, a flat gasket, an elastic gasket, a copper alloy nut and a transmission plate,

the shaft is a stepped shaft comprising a left section and a right section, the idle gear is installed on the left section of the shaft through a bearing, the transmission plate is installed in the middle of the shaft, and a counter bore matched with the step of the shaft is formed in the inner side of the transmission plate; the outer end of the shaft is provided with threads, and is sequentially sleeved with a flat gasket, an elastic gasket and a copper alloy nut, the flat gasket is contacted with the outer side of the transmission plate, and the idle wheel combined structure is fastened by screwing the copper alloy nut.

2. The idler assembly structure with axial fastening function as claimed in claim 1, wherein: the bearing is slightly interfered on the idle gear, the shaft and the bearing are in small clearance fit, and the shaft and the transmission plate are in clearance fit.