CN202301885U

CN202301885U - Idle gear assembly

Info

Publication number: CN202301885U
Application number: CN2011203747901U
Authority: CN
Inventors: 李玉霞; 刘振锋; 李明星; 陈土润
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2012-07-04
Anticipated expiration: 2021-09-30

Abstract

The utility model discloses an idle gear assembly, which comprises an idle gear shaft, an idle gear, and a bearing arranged between the idle gear shaft and the idle gear. The bearing is an antifriction bearing. Since an antifriction bearing is arranged between the idle gear shaft and the idle gear, less heat is generated by the rolling friction. Through the splash lubrication effect of lubricating oil arranged in a gear chamber, the requirements of heat radiation and antifriction on the antifriction bearing can be satisfied. Meanwhile, the casting and machining difficulty is reduced and the manufacturing cost is lowered without the need of arranging special lubricating oil ducts on a cylinder body and on the idle gear shaft. The antifriction bearing is a serialized standard piece, so that the antifriction bearing does not need to be designed and manufactured specially.

Description

The idle gear assembly

Technical field

The utility model relates to engine art, particularly a kind of idle gear assembly.

Background technique

The motor idle gear is the gears that play transfer functions in the middle of two driving gears of not contacting with each other, is used for changing the sense of rotation of driven gear, makes it identical with driving gear, only changes rotation direction and can not change velocity ratio.The effect of idle gear mainly contains two: the one, change the gear rotation direction, and the 2nd, the spatial arrangement of adjustment motor complete machine train of gearings.

As shown in Figure 1; Idle gear axle 5 is fixed on the cylinder block 6 through bolt 2, and idle gear 1 is sleeved on the idle gear axle 5, and the end of idle gear axle 5 also is fixed with idle gear wear strip 4 through bolt 2; The edge of this idle gear wear strip 4 props up idle gear 1; Prevent idle gear 1 slippage from the idle gear axle 5, idle gear 1 relative idle gear axle 5 rotations realize the power transmission of engine gear system.Be provided with bearing 3 between idle gear axle 5 and the idle gear 1, to reduce the friction and wear between gear and the axle, the rotation that keeps idle gear.

Bearing 3 between existing idle gear axle 5 and the idle gear 1 adopts sliding bearing (being the integrated type lining), and friction type is sliding friction, and friction factor is high, and the frictional heat of generation is big, wearing and tearing are big.Because frictional heat is big,, need increase liquid lubrication to bearing 3 for reducing the wearing and tearing and the gummed of lining.The source of lubricant oil: need be on the cylinder block, offer special oil duct 51 on the idle gear axle 5; The lubricant oil of cylinder block main oil gallery is guided to idle gear bearing 3 places to be lubricated; And offer special oil leab 51, increased cylinder block 6, the casting of idle gear axle 5, machining difficulty.In addition, bearing 3 need be according to size specialized designs, the manufacturing of axle and gear, and processing technology is complicated.

The model utility content

The technical problem that the utility model solves provides little, the lubricated idle gear assembly easily of a kind of friction.

For achieving the above object, a kind of idle gear assembly that the utility model provides comprises: idle gear axle, idle gear and be arranged on the bearing between idle gear axle and the idle gear, bearing is a rolling bearing.

Further, the outer ring of rolling bearing and idle gear interference fit, the inner ring of rolling bearing and idle gear axle transition fit.

Further; Rolling bearing is two, is provided with packing ring between the inner ring of two rolling bearings, is provided with back-up ring between the outer ring; The left end of idle gear axle has the radial flange of backstop outside rolling bearing inner ring, and right-hand member is set with the thrust plate of the inboard rolling bearing inner ring of backstop.

Further, have the nail hole of running through vertically excessively on the idle gear axle, end through being bolted to cylinder block.

According to the technological scheme of the utility model, because the bearing between idle gear axle and the idle gear adopts rolling bearing, rolling friction, the heat of generation is little.Utilize lubricated heat radiation, the anti-attrition requirement that can satisfy rolling bearing of lubricating oil splash in the gear chamber, on cylinder block and idle gear axle, need not to offer special oil leab and reduced casting and mach difficulty, reduced manufacture cost.Rolling bearing is the seriation standard piece, need not specialized designs and manufacturing.

Description of drawings

The sectional structure schematic representation of the existing idle gear assembly of Fig. 1;

Fig. 2 is the sectional structure schematic representation according to the idle gear assembly of the utility model.

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the utility model is described in detail, but the protection domain that is to be understood that the utility model does not receive the restriction of embodiment.

Referring to Fig. 2, this idle gear assembly comprises: idle gear axle 7, idle gear 8, rolling bearing 9, rolling bearing 10, packing ring 11, back-up ring 12 and thrust plate 13.Wherein, idle gear axle 7 has three mistake nail holes 71 running through vertically, and left end has radial flange 72; The center hole of idle gear 8 has the annular groove (not marking among the figure) that distributes along circumferentially; Thrust plate 13 is a ring-type.

During installation, earlier back-up ring 12 is installed in the annular groove of idle gear 8, behind induction heating to 180 ℃-200 ℃, rolling bearing 9 is press fit on the idle gear 8, and makes rolling bearing 9 outer rings be adjacent to back-up ring 12 at idle gear 8.Then, be placed on packing ring 11 on the inner ring of rolling bearing 9, second rolling bearing 10 pressed fit in the idle gear 8, and make second rolling bearing 10 inner ring be adjacent to packing ring 11 idle gear 8 upsets.The outer ring of rolling bearing 9,10 and idle gear 8 interference fit.

Then, idle gear axle 7 is passed two

rolling bearings

9,10, the radial flange 72 of idle gear axle 7 is close to the inner ring of outside rolling bearing 9.The inner ring transition fit of idle gear axle 7 and rolling bearing 9,10.Thrust plate 13 passes idle gear axle 7, is close to the inner ring of inboard rolling bearing 10.The idle gear axle 7 that will install above-mentioned part is at last packed into (not marking among the figure) in the cylinder block 14 corresponding idle gear axis holes, and three mistake nail holes 71 passing idle gear axle 7 with three bolts 15 tighten.

In the working procedure, the inner ring of rolling bearing 9,10 is fixed, and bolt 15 is pressed on outside rolling bearing 9 inner rings, packing ring 11, inboard rolling bearing 10 inner rings, thrust plate 13 on the cylinder block 14 through the end face of idle gear axle 7.Rotate with idle gear 8 outer ring of rolling bearing 9,10.

Bearing between idle gear axle 7 and the idle gear 8 adopts rolling bearing, rolling friction, and the heat of generation is little.Utilize lubricated heat radiation, the anti-attrition requirement that can satisfy rolling bearing of lubricating oil splash in the gear chamber, on cylinder block 14 and idle gear axle 7, need not to offer special oil leab and reduced casting and mach difficulty, reduced manufacture cost.Rolling bearing is the seriation standard piece, need not specialized designs and manufacturing.

More than a disclosed specific embodiment that is merely the utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into the protection domain of the utility model.

Claims

1. idle gear assembly comprises: idle gear axle, idle gear and be arranged on the bearing between said idle gear axle and the idle gear is characterized in that said bearing is a rolling bearing.

2. idle gear assembly according to claim 1 is characterized in that, the outer ring of said rolling bearing and said idle gear interference fit, the inner ring of said rolling bearing and said idle gear axle transition fit.

3. idle gear assembly according to claim 1; It is characterized in that; Said rolling bearing is two, is provided with packing ring between the inner ring of said two rolling bearings, is provided with back-up ring between the outer ring; The left end of said idle gear axle has the radial flange of the said rolling bearing inner ring in the backstop outside, and right-hand member is set with the thrust plate of the inboard said rolling bearing inner ring of backstop.

4. according to each described idle gear assembly in the claim 1 to 3, it is characterized in that having the nail hole of running through vertically excessively on the said idle gear axle, through being bolted on the cylinder block.