CN2931812Y

CN2931812Y - Crankshaft caging device of engine crankshaft

Info

Publication number: CN2931812Y
Application number: CN 200620086516
Authority: CN
Inventors: 王全峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-28
Filing date: 2006-06-28
Publication date: 2007-08-08
Anticipated expiration: 2016-06-28

Abstract

The utility model discloses an engine crankshaft locking device, which resolve the problem when an axial force applies to the crankshaft the thrust collar is over fretted to drop to damage the engine. The apparatus is characterized in that an axial locking device is provided at the pulley portion of the crankshaft to restrict the crankshaft slowly moving to the side of the pulley, which comprises a ball bearing arranged in a installing hole of the pulley bearable the axial force, a thrust plate arranged at the inner ring bore of the ball bearing, and a supporting apparatus arranged outside the engine body making the thrust plate axially bearing against an outer end-face of the inner ring of the ball bearing, wherein the outer end-face of the outer ring of the ball bearing bears against the thrust plate end-face of the installing hole of the pulley. The crankshaft can not slowly move to the pulley portion, thereby the corresponding end-face between the thrust collar and the crankshaft can not be over broken frequently using the clutch, and the use reliability of the engine can be improved.

Description

The limit stoper of engine crankshaft

Technical field

The utility model relates to technical field of engines, relates in particular to a kind of position device for limiting that engine crankshaft is supported in rotationally engine body by several crankshaft bearing assemblies.

Background technique

The bent axle of motor has several revolution axle journal and several eccentric journals, at each revolution axle journal place one cover crankshaft bearing assembly is installed all, the crankshaft bearing assembly is actually a kind of sliding bearing of detachable connection, and it is made up of a bearing liner and a bearing gland that is fixed in engine body.At each eccentric journal place one cover piston rod is installed, when piston moved back and forth in cylinder body, piston rod drove bent axle and rotates.

Engine crankshaft has two ends, and one of them end is fixed with flywheel, and is connected with clutch at this end, externally outputting power; The other end is fixed with belt pulley and is used for inner outputting power.In a cover crankshaft bearing assembly of the most close flywheel, be provided with two thrust rings, these two thrust rings are arranged at respectively in the depression of crankshaft bearing assembly both sides end face.Because when engine operation, bent axle relatively rotates with respect to the crankshaft bearing assembly, so must leave certain clearance between the corresponding Thrust Faces of the end face of thrust ring and bent axle, this gap can not be excessive can not be too small, generally be set at 0.07mm～0.23mm.Behind the thrust ring end wear, it is big that gap between the corresponding Thrust Faces of the end face of thrust ring and bent axle becomes, and when gap during greater than the residual thickness of thrust ring, thrust ring will spin off from the sunken end face of crankshaft bearing assembly.Thrust ring comes off, not only can cause the further expansion in the Thrust Faces gap of the end face of crankshaft bearing assembly and bent axle, and the end face of the bearing liner of crankshaft bearing assembly or bearing gland will directly contact the Thrust Faces of bent axle, because the end face of bearing liner or bearing gland is generally without Wear-resistant Treatment, so when this situation occurring, crankshaft bearing assembly and bent axle will cause the damage that is difficult to repair in the short period of time.Produce the reason of this destruction, be because when using clutch mostly, especially clutch " from " time, bent axle can be subjected to an end thrust, this end thrust can make bent axle to the pulley end play, thereby has aggravated to be installed on the wearing and tearing between the interior corresponding Thrust Faces with bent axle of thrust ring of crankshaft bearing assembly flywheel side depression.This situation shows the most obviously in the equipment of frequent use clutch, the motor that for example uses in salt harvester.

Summary of the invention

Technical problem to be solved in the utility model is: a kind of limit stoper of engine crankshaft is provided, to solve when bent axle is subjected to axial force, makes the thrust ring excessive wear easily and come off the problem that causes motor to damage.

For solving the problems of the technologies described above, the technical solution of the utility model is: the limit stoper of engine crankshaft, the crankshaft bearing assembly that comprises the revolution axle journal place that is installed on bent axle, one end of described bent axle is fixed with a belt pulley that is positioned at the engine body outside, and this limit stoper also comprises the axially stop block of a described bent axle of restriction to the pulley end play; Described axially stop block comprises the rolling bearing of the born axial force in the mounting hole that is installed on described belt pulley, with the thrust button that is installed on described rolling bearing inner ring hole and be fixed in the engine body outside, can make described thrust button axially rely on described rolling bearing inner ring outside end face lean device; The outer ring inner side end of described rolling bearing relies on the Thrust Faces of the mounting hole of described belt pulley.

As a kind of embodiment, the described device that leans comprises and is fixed in described engine body and is positioned at described Pulley shaft fixed support laterally, with be fixedly connected on described support bracket fastened locating stud, the end of described locating stud relies on the axial pit of described thrust button.

As a kind of improvement, described locating stud is two, and one of them locating stud is threaded with described fixed support and the axis of this locating stud is positioned on the gyration center line of described thrust button.

After having adopted technique scheme, the beneficial effects of the utility model are: after the revolution axle journal place of bent axle installed the crankshaft bearing assembly, bent axle had just obtained radially spacing reliably on engine body.Because this limit stoper also comprises the axially stop block of a described bent axle of restriction to the pulley end play; Described axially stop block comprises the rolling bearing of the born axial force in the mounting hole that is installed on described belt pulley, with the thrust button that is installed on described rolling bearing inner ring hole and be fixed in the engine body outside, can make described thrust button axially rely on described rolling bearing inner ring outside end face lean device; The outer ring inner side end of described rolling bearing relies on the Thrust Faces of the mounting hole of described belt pulley; Described lean device comprise be fixed in described engine body and be positioned at described Pulley shaft laterally fixed support and be fixedly connected on described support bracket fastened locating stud, the end of described locating stud relies on the axial pit of described thrust button; So, when bent axle is subjected to end thrust from the flywheel end, this axial force at first passes to the outer ring of rolling bearing by belt pulley, by the self structure of rolling bearing this power is passed to the inner ring of rolling bearing again, pass to fixed support by thrust button and locating stud again, fixed support is fixed in engine body, thereby described axial force finally passes to engine body, pass through said structure, limited bent axle to the pulley end play, thereby when bent axle is subjected to axial force, can make thrust ring be subjected to undue wear and come off, avoid the generation of serious accident.

Because described locating stud is two, one of them locating stud is threaded with described fixed support and the axis of this locating stud is positioned on the gyration center line of described thrust button, so the position of this locating stud can axial adjustment, thereby bent axle can be limited on the most rational position, and when bearing axial pushing force, this locating stud can also make thrust button stressed evenly.The effect of another locating stud is, in the bent axle rotating process, thrust button can not rotated with rolling bearing, and the locating stud of having protected axis to be positioned at the gyration center line of described thrust button is not worn.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing is the utility model embodiment's a longitudinal sectional view.

Embodiment

A kind of limit stoper of engine crankshaft, as shown in drawings, crankshaft bearing assembly 4 is installed on the revolution axle journal place of bent axle 3, and crankshaft bearing assembly 4 is sliding bearings of detachable connection, and it is made up of a bearing liner and a bearing gland that is fixed in engine body 1.Bent axle 3 has two ends, and one of them end is fixed with flywheel 6, and is connected with clutch at this end, externally outputting power; The other end is fixed with belt pulley 7 and is used for inner outputting power, and belt pulley 7 is positioned at the outside of engine body 1, and the flange connector that belt pulley 7 is connected with bent axle 3 axially relies on the outside end face of timing gear 2.First thrust ring 5 and second thrust ring 5 ' are arranged on the crankshaft bearing assembly 4 of a flywheel 6 the most close, first thrust ring 5 is arranged in the depression of end face of close flywheel of this crankshaft bearing assembly 4, and second thrust ring 5 ' is arranged in the depression away from the end face of flywheel of this crankshaft bearing assembly 4.

Rolling bearing 8 is installed in the mounting hole of belt pulley 7, the outer ring inner side end of rolling bearing 8 relies on the Thrust Faces of the mounting hole of belt pulley 7, rolling bearing 8 can adopt angular contact ball bearing or deep groove ball bearing, also can adopt the circular cone roller bearing, this in a word bearing is wanted to bear certain axial force.Thrust button 9 is installed on the inner ring hole of rolling bearing 8.Fixed support 10 is fixed in described engine body 1 and is positioned at described Pulley shaft laterally by symmetrically arranged four screw rods 13, fixed support 10 is provided with two locating studs 11,12, the end of these two locating studs 11,12 relies on the axial pit of thrust button 9 respectively, and one of them locating stud 11 is threaded with described fixed support 10 and the axis of this locating stud 11 is positioned on the gyration center line of described thrust button 9.From leaning the angle of thrust button 9; get final product with a locating stud 11; but in the bent axle rotating process; under the effect of frictional force, the inner ring of rolling bearing 8 also has the trend of rotating with the outer ring, if the inner ring of rolling bearing 8 rotates; the thrust button 9 that is fixed thereon also can rotate; thereby make axis be positioned at locating stud 11 wearing and tearing of the gyration center line of thrust button 9, second locating stud 12 is set limits thrust button 9 rotations, thereby protection locating stud 11 is not worn.Certainly, these two locating studs also can be arranged to respect to the gyration center symmetry of described thrust button 9 and the form that is threaded with fixed support 10 respectively, like this, the one, when bearing axial force, make thrust button 9 stressed even, the 2nd, prevent that thrust button 9 from rotating, three is that the position of two locating studs all can axial adjustment, thereby bent axle 3 can be limited on the most rational position.Thus, fixed support 10 and locating stud constituted jointly one be fixed in the engine body outside, can make described thrust button 9 axially rely on described rolling bearing 8 inner ring outside end face lean device.

The utility model is not limited to above-mentioned mode of execution, its essence is, belt pulley side at bent axle 3 is provided with an axially stop block that can limit bent axle 3 to the pulley end play, by this axially stop block, when being subjected to end thrust, for example when frequently using clutch, bent axle 3 can be to the pulley end play, thereby can not cause excessive wear between the corresponding end-faces of first thrust ring 5 and bent axle 2, guaranteed the reliability that motor uses in this case, if the installation precision of bent axle is enough high, also can save first thrust ring 5.

Claims

1, the limit stoper of engine crankshaft, the crankshaft bearing assembly (4) that comprises the revolution axle journal place that is installed on bent axle (3), one end of described bent axle (3) is fixed with a belt pulley (7) that is positioned at the engine body outside, it is characterized in that: this limit stoper also comprises the axially stop block of a described bent axle of restriction (3) to the pulley end play; Described axially stop block comprises the rolling bearing (8) of the born axial force in the mounting hole that is installed on described belt pulley (7), with the thrust button that is installed on described rolling bearing inner ring hole (9) and be fixed in the engine body outside, can make described thrust button (9) axially rely on described rolling bearing (8) inner ring outside end face lean device; The outer ring inner side end of described rolling bearing (8) relies on the Thrust Faces of the mounting hole of described belt pulley.

2, the limit stoper of engine crankshaft as claimed in claim 1, it is characterized in that: the described device that leans comprises and is fixed in described engine body (1) and is positioned at described Pulley shaft fixed support (10) laterally, with the locating stud that is fixedly connected on described fixed support (10), the end of described locating stud relies on the axial pit of described thrust button (9).

3, the limit stoper of engine crankshaft as claimed in claim 2 is characterized in that: described locating stud is two, and these two locating studs are threaded with described fixed support (10) respectively and are symmetrical arranged with respect to the gyration center of described thrust button (9).

4, the limit stoper of engine crankshaft as claimed in claim 2, it is characterized in that: described locating stud is two, and one of them locating stud is threaded with described fixed support (10) and the axis of this locating stud is positioned on the gyration center line of described thrust button (9).

5, as the limit stoper of described any engine crankshaft of claim 1 to 4, it is characterized in that: described rolling bearing (8) is angular contact ball bearing or deep groove ball bearing.