阅读说明：本技术 发动机曲轴箱及其轴承连接结构 (Engine crankcase and bearing connection structure thereof ) 是由 张云周 王俊龙 于 2021-09-02 设计创作，主要内容包括：本发明涉及摩托车发动机技术领域,公开了一种发动机曲轴箱及其轴承连接结构,包括轴承,其套装于曲轴上；箱体,其靠近轴承的一端设置有固定位；以及垫片,其两侧端面分别抵接于轴承和箱体,垫片固定于固定位中且垫片的外周面受到固定位的限位。箱体靠近轴承的一端设置有固定位,垫片固定于固定位中且两端分别抵接箱体和轴承,垫片的外周面受到固定位的限位。通过设置固定位,使垫片固定于箱体和轴承之间,垫片两端抵接箱体和轴承,使垫片固定牢靠,无需额外涂抹油脂进行固定,减少了油脂浪费且防止了垫片的滑落；固定位对垫片的外周进行限位,增加了垫片的外周面受到的摩擦力,使其不易随轴承转动,防止对箱体产生磨损,保证了装置的寿命。(The invention relates to the technical field of motorcycle engines, and discloses an engine crankcase and a bearing connecting structure thereof, which comprise a bearing, wherein the bearing is sleeved on a crankshaft; the box body is provided with a fixing position at one end close to the bearing; and the end surfaces of two sides of the gasket are respectively abutted against the bearing and the box body, the gasket is fixed in the fixed position, and the peripheral surface of the gasket is limited by the fixed position. The one end that the box is close to the bearing is provided with fixed position, and the gasket is fixed in fixed position and both ends butt box and bearing respectively, and the outer peripheral face of gasket receives the spacing of fixed position. The gasket is fixed between the box body and the bearing by arranging the fixing position, and two ends of the gasket are abutted against the box body and the bearing, so that the gasket is firmly fixed, and is fixed without being additionally coated with grease, thereby reducing grease waste and preventing the gasket from sliding; the fixed position is limited to the periphery of the gasket, the friction force received by the peripheral face of the gasket is increased, the gasket is not easy to rotate along with the bearing, abrasion to the box body is prevented, and the service life of the device is guaranteed.)

1. A bearing connecting structure of an engine crankcase, characterized by comprising:

the bearing is sleeved on the crankshaft;

the box body is provided with a fixing position at one end close to the bearing; and

and the end surfaces of two sides of the gasket are respectively abutted against the bearing and the box body, the gasket is fixed in the fixing position, and the peripheral surface of the gasket is limited by the fixing position.

2. The bearing connecting structure of the engine crankcase according to claim 1, wherein: the fixing position comprises a groove body formed by inwards recessing the inner wall of the box body.

3. The bearing connecting structure of the engine crankcase according to claim 2, wherein: the side wall of the tank body is cylindrical, and the gasket is in a ring shape matched with the side wall of the tank body.

4. The bearing connecting structure of the engine crankcase according to claim 3, wherein: the outer diameter of the gasket is matched with the inner diameter of the side wall of the groove body.

5. The bearing connection structure of the engine crankcase according to any one of claims 1 to 4, wherein: the gasket has elasticity and be provided with the breach on the gasket.

6. The bearing connecting structure of the engine crankcase according to claim 5, wherein: the length of the gap is less than 5% of the perimeter of the gasket.

7. The bearing connecting structure of the engine crankcase according to claim 5, wherein: the outer diameter of the gasket is larger than the inner diameter of the side wall of the groove body, so that the gasket is abutted against the inner side of the side wall of the groove body through elasticity.

8. The bearing connecting structure of the engine crankcase according to claim 5, wherein: the outer diameter of the gasket when the gasket is assembled in the groove body is equal to the outer diameter of the bearing.

9. An engine crankcase, characterized in that: bearing connection comprising an engine crankcase according to any of claims 1-8.

Technical Field

The invention relates to the technical field of motorcycle engines, in particular to an engine crankcase and a bearing connecting structure thereof.

Background

When a crankcase of an engine is installed, a gap adjusting gasket is arranged on one side of a bearing of the crankshaft, the inner diameter of the gap adjusting gasket is larger than the outer diameter of the crankshaft, and the gap adjusting gasket is difficult to position in the radial direction during installation. The prior art is that grease is smeared on two symmetrical positions on the end face of a gap adjusting gasket (namely, the end face of a box body is attached), the gasket is adhered to the box body by virtue of the adhesion effect of the grease, and the gasket is prevented from falling off when the box body is buckled with the box body in a reverse mode, so that the mode has the defects that the quantitative grease amount cannot be controlled, the grease is easily wasted when the grease is excessive, and the gasket is easily slipped off due to insufficient adsorption force when the grease is insufficient; the gasket lacks frictional force in its radial for the gasket easily rotates along with the bearing, causes the wearing and tearing to the box.

Disclosure of Invention

The purpose of the invention is: the utility model provides a bearing connection structure of engine crankcase, it need not additionally to paint the grease and carries out the fixed of gasket, has reduced the grease extravagant and has prevented the landing of gasket, and the gasket is difficult to rotate along with the bearing, prevents to produce wearing and tearing to the box, has guaranteed the life-span of device.

In order to achieve the above object, the present invention provides a bearing connecting structure of an engine crankcase, comprising:

the bearing is sleeved on the crankshaft;

the box body is provided with a fixing position at one end close to the bearing; and

and the end surfaces of two sides of the gasket are respectively abutted against the bearing and the box body, the gasket is fixed in the fixing position, and the peripheral surface of the gasket is limited by the fixing position.

Compared with the prior art, the bearing connecting structure of the engine crankcase has the beneficial effects that: the one end that the box is close to the bearing is provided with fixed position, and the gasket is fixed in fixed position and both ends butt box and bearing respectively, and the outer peripheral face of gasket receives the spacing of fixed position. The gasket is fixed between the box body and the bearing by arranging the fixing position, and two ends of the gasket are abutted against the box body and the bearing, so that the gasket is firmly fixed, and is fixed without being additionally coated with grease, thereby reducing grease waste and preventing the gasket from sliding; the fixed position is limited to the periphery of the gasket, the friction force received by the peripheral face of the gasket is increased, the gasket is not easy to rotate along with the bearing, abrasion to the box body is prevented, and the service life of the device is guaranteed.

According to the bearing connecting structure of the engine crankcase, the fixing position comprises a groove body formed by inwards sinking the inner wall of the box body.

According to the bearing connecting structure of the engine crankcase, the side wall of the groove body is cylindrical, and the gasket is annular and matched with the side wall of the groove body.

According to the bearing connecting structure of the engine crankcase, provided by the embodiment of the invention, the outer diameter of the gasket is matched with the inner diameter of the side wall of the groove body.

According to the bearing connecting structure of the engine crankcase, the gasket is elastic, and the gasket is provided with the notch.

According to the bearing connecting structure of the engine crankcase, the length of the gap is less than 5% of the circumference of the gasket.

According to the bearing connecting structure of the engine crankcase, provided by the embodiment of the invention, the outer diameter of the gasket when the gasket is assembled in the groove body is larger than the inner diameter of the side wall of the groove body, so that the gasket is abutted against the inner side of the side wall of the groove body through elasticity.

According to the bearing connecting structure of the engine crankcase, the outer diameter of the gasket is equal to that of the bearing.

The invention also provides an engine crankcase, which comprises the bearing connecting structure of the engine crankcase.

Compared with the prior art, the engine crankcase of the embodiment of the invention has the beneficial effects that: be provided with the bent axle in the bearing box, the cover is equipped with the bearing on the bent axle, and the box of bearing box is close to the one end of bearing and is provided with fixed position, and the gasket is fixed in the fixed position and both ends butt box and bearing respectively, and the outer peripheral face of gasket receives the spacing of fixed position. The gasket is fixed between the box body and the bearing by arranging the fixing position, and two ends of the gasket are abutted against the box body and the bearing, so that the gasket is firmly fixed, and is fixed without being additionally coated with grease, thereby reducing grease waste and preventing the gasket from sliding; the fixed position is limited to the periphery of the gasket, the friction force received by the peripheral face of the gasket is increased, the gasket is not easy to rotate along with the bearing, abrasion to the box body is prevented, and the service life of the device is guaranteed.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of a crankcase of an embodiment of the invention;

fig. 2 is a schematic structural view of a bearing coupling structure of a crankcase according to an embodiment of the invention;

FIG. 3 is a schematic structural view of a case of a crankcase of an embodiment of the invention;

FIG. 4 is a schematic view of a gasket of a bearing coupling structure of a crankcase according to an embodiment of the invention;

in the figure, 1, crankshaft; 2. a bearing; 3. a box body; 31. a trough body; 4. a gasket; 41. and (4) a notch.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1, in an engine crankcase according to a preferred embodiment of the present invention, a crankshaft 1 penetrates through the crankcase, at least two bearings 2 are sleeved on the crankshaft 1, the crankcase includes a plurality of cases 3, a gasket 4 is disposed between the case 3 and the bearing 2 on a side close to the bearing 2, and a distance between the bearing 2 and the case 3 can be adjusted by replacing the gasket 4.

As shown in fig. 2, the bearing connection structure of the engine crankcase according to the preferred embodiment of the present invention includes a bearing 2, which is sleeved on a crankshaft 1, an inner ring of the bearing 2 is sleeved on the crankshaft 1, and an outer ring is fixed in the crankcase, so that the crankshaft 1 is well fixed and does not affect the rotation thereof; the bearing connecting structure of the engine crankcase further comprises a box body 3, one end, extending out of the bearing 2, of the crankshaft 1 extends into the box body 3, the box body 3 needs to be tightly attached to the bearing 2, the crankshaft 1 is prevented from being exposed, a gasket 4 used for adjusting a gap is arranged between the box body 3 and the bearing 2, end faces of two sides of the gasket 4 are respectively abutted against the bearing 2 and the box body 3, the bearing 2 is prevented from contacting the box body 3, and the box body 3 is prevented from being abraded due to rotation of the bearing 2; a fixing position is arranged at one end of the box body 3 close to the bearing 2, and the gasket 4 is fixed in the fixing position, so that the gasket 4 is firmly fixed, and is fixed without additionally coating grease, thereby reducing grease waste and preventing the gasket 4 from sliding; the outer peripheral face of gasket 4 receives the spacing of fixed position, has increased the frictional force that the outer peripheral face of gasket 4 received, makes it be difficult for rotating along with bearing 2, prevents to produce wearing and tearing to box 3, has guaranteed the life-span of device.

As shown in fig. 2, in some embodiments of the present invention, the fixing portion includes a groove 31 formed by an inner wall of the box 3 being recessed inward, the gasket 4 is fixed in the groove 31, an outer circumferential surface of the gasket 4 is limited by a side wall of the groove 31 so that it can move only inside the groove 31, the recessed groove 31 limits movement of the gasket 4 in a vertical direction, and the bearing 2 and the box 3 abutting against two sides of the gasket 4 respectively further limit movement of the gasket 4 in a horizontal direction, so that the groove 31, the box 3 and the bearing 2 act together to firmly fix the gasket 4, prevent it from sliding in any direction, and increase reliability of the bearing connection structure.

As shown in fig. 2, in some embodiments of the present invention, the fixing position may also be a boss (not shown in the figure), an outer wall connected to the outer ring of the bearing 2 is disposed outside the boss, the outer circumferential surface of the spacer 4 is limited by the outer wall, and two ends of the spacer 4 are limited by the boss and the bearing 2, so that the fixing is firm, and the reliability of the device is increased.

As shown in fig. 2, in some embodiments of the present invention, the side wall of the groove 31 is cylindrical, the side wall of the groove 31 matches the shape of the outer circumferential surface of the bearing 2, and the inner diameter of the side wall of the groove 31 is larger than the outer diameter of the bearing 2, so that the side wall of the groove 31 extends to the radial outer side of the bearing 2 when the bearing is installed, and the side wall of the groove 31 is prevented from interfering with the bearing 2 after the bearing is installed. The gasket 4 is in a circular ring shape matched with the side wall of the groove body 31, the shape of the gasket 4 is matched with the side wall of the groove body 31, so that the gasket 4 can be fixed in the groove body 31 and cannot interfere with the side wall of the groove body 31 in the working process, and the service life of the device is ensured.

As shown in fig. 2, in some embodiments of the present invention, the inner diameter of the side wall of the groove 31 is matched with the outer diameter of the bearing 2, so that the side wall of the groove 31 is firmly fixed to the bearing 2 after installation, thereby further enhancing the fixation of the bearing 2 and preventing the crankshaft 1 from driving the bearing 2 to rotate, which may cause wear of the crankcase.

As shown in fig. 2 and 3, in some embodiments of the present invention, the outer diameter of the gasket 4 matches the inner diameter of the sidewall of the slot 31, so that the gasket 4 is further firmly fixed in the slot 31. Specifically, the gasket 4 is in interference fit with the side wall of the groove body 31, the gasket 4 is made of an elastic metal material, and the outer diameter of the gasket is larger than the inner diameter of the side wall of the groove body 31, so that the outer side of the gasket 4 is tightly attached to the inner side of the side wall of the groove body 31 under the action of elasticity during installation, the gasket 4 is firmly fixed, and the gasket is limited by the side wall of the groove body 31 in the vertical direction.

As shown in fig. 3 and 4, in some embodiments of the present invention, the gasket 4 has elasticity, and the gasket 4 is made of a metal material having elasticity, such as spring steel, so that it has certain elasticity and certain deformation allowance, and is convenient to be installed in the groove 31 when the gasket 4 is installed. The gap 41 is arranged on the gasket 4, so that the size of the gasket 4 can be changed in a small range under the action of external force, the gasket is extruded when being installed, the space of the gap 41 is utilized, the outer diameter of the gasket 4 is reduced, and the process of clamping the gasket into the groove body 31 is simpler and faster.

As shown in fig. 3 and 4, in some embodiments of the present invention, the length of the gap 41 is less than 5% of the perimeter of the gasket 4, and an excessive length of the gap 41 may affect the strength of the gasket 4 as a whole, further affecting the life of the device; the length of the gap 41 of the gasket 4 is set to be 3% appropriate, so that the gasket 4 is ensured to have appropriate deformation allowance while enough strength is ensured.

As shown in fig. 2 and 4, in some embodiments of the present invention, the outer diameter of the gasket 4 is larger than the inner diameter of the sidewall of the slot body 31, specifically, the difference between the outer diameter of the gasket 4 and the inner diameter of the sidewall of the slot body 31 is not more than 2%, on one hand, the gasket 4 can abut against the inner side of the sidewall of the slot body 31 through elastic force, and on the other hand, the gasket 4 can be prevented from being too large to be clamped into the slot body 31.

In some embodiments of the present invention, the outer diameter of the gasket 4 is equal to the outer diameter of the bearing 2, so that the outer peripheral surfaces of the gasket 4 and the bearing 2 are both clamped at the inner side of the side wall of the groove body 31, and the gasket 4 and the bearing 2 are both fixed by the side wall of the groove body 31, so that the size of the side wall of the groove body 31 does not need to be changed, the gasket 4 and the bearing 2 can be adapted at one time, and the processing of the box body 3 is further facilitated.

In some embodiments of the present invention, the outer diameter of the gasket 4 is larger than the outer diameter of the bearing 2, the gasket 4 has elasticity, but the bearing 2 has no elasticity, and when the gasket 4 is installed, the outer diameter of the gasket can be reduced by pressing, and the gasket and the bearing 2 can abut against the side wall of the groove 31 with the same size.

As shown in fig. 2, in some embodiments of the present invention, the width of the spacer 4 is smaller than the width of the outer ring of the bearing 2, the outer ring of the bearing 2 is a fixed end, the inner ring is a rotating end rotating with the crankshaft 1, and the width of the spacer 4 is smaller than the width of the outer ring, so as to prevent the spacer 4 from abutting against the inner ring of the bearing 2 and rubbing against the inner ring of the bearing 2, which may cause wear between the spacer 4 and the bearing 2, and ensure the lifetime of the device.

The working process of the invention is as follows: a crankshaft 1 is arranged in a bearing 2 box, the crankshaft 1 is sleeved with the bearing 2, a fixing position is arranged at one end, close to the bearing 2, of a box body 3 of the bearing 2 box, a gasket 4 is arranged in the fixing position, the gasket 4 is elastic and provided with a gap 41, the gasket 4 is fixed in the fixing position after being extruded, and abuts against the side wall of the fixing position through the elastic action, so that the peripheral surface of the gasket 4 is limited by the fixing position, and is limited in the vertical direction; the two ends of the gasket 4 are respectively abutted against the box body 3 and the bearing 2, so that the gasket is limited in the horizontal direction.

To sum up, the embodiment of the invention provides an engine crankcase and a bearing connecting structure thereof, wherein a fixing position is arranged, so that a gasket 4 is fixed between a box body 3 and a bearing 2, two ends of the gasket 4 are abutted against the box body 3 and the bearing 2, the gasket 4 is firmly fixed, grease is not required to be additionally coated for fixing, waste of the grease is reduced, and the gasket 4 is prevented from sliding; the fixed position is spacing to the periphery of gasket 4, has increased the frictional force that the outer peripheral face of gasket 4 received, makes it be difficult for rotating along with bearing 2, prevents to produce wearing and tearing to box 3, has guaranteed the life-span of device.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.