CN204664183U - Bearing block assembly and motor - Google Patents

Abstract

The utility model relates to an engine and provides a bearing seat assembly and an engine. The bearing seat assembly includes a bearing seat and a bearing cap detachably fixedly connected to the bearing seat through fastening bolts. The bearing seat has a first installation surface, the bearing cover has a second installation surface that can be attached to the first installation surface, wherein a protrusion is provided on one of the first installation surface and the second installation surface, and the On the other of the first installation surface and the second installation surface, a depression is formed by crushing the protrusion at a position corresponding to the protrusion, and the press fit between the protrusion and the depression can Relative movement of the bearing cover in any direction on the first installation surface relative to the bearing seat is restricted. The bearing block assembly described in the utility model can improve the positioning deviation of the bearing cap, ensure the shape of the main shaft hole, and optimize the operating environment of the shaft.

Description

Housing assemblies and motors

technical field

The utility model relates to an engine, in particular to a bearing seat assembly and an engine comprising the bearing seat assembly.

Background technique

Generally, the shaft is rotatably installed in the shaft hole of the bearing housing through the bearing.

For example, in most engines, the crankshaft is rotatably installed in the main shaft hole of the bearing housing assembly through bearings, so as to convert the reciprocating linear motion of the piston into the rotary motion of the crankshaft itself, thereby outputting power. During the working process of the engine, the bearing needs to bear the reciprocating inertial force and the rotating inertial force whose magnitude and direction change periodically due to the rotational motion of the crankshaft. Therefore, the installation accuracy and installation strength of the crankshaft directly affect the operating environment of the crankshaft, which in turn affects the power performance and service life of the engine as well as the NVH (Noise, Vibration, Harshness) performance and safety performance of the vehicle.

Generally, a bearing housing assembly is mainly composed of two parts: a bearing housing and a bearing cap that is removably mounted to the bearing housing. When in use, the bearing cover is detachably fixedly connected to the bearing seat through fastening bolts. But before use, the spindle hole needs to be machined to place the crankshaft. In the prior art, the main shaft hole is generally processed in this way: firstly, the positioning pin is used to relatively fix the bearing seat and the bearing cover to process the main shaft hole through assembly processing, wherein the positioning pin is inserted into the bearing seat and the bearing cover correspondingly. in the bolt holes. After the machining of the main shaft hole is completed, the bearing cover is removed, and after the crankshaft and the bearing are installed, the bearing cover is fixedly installed on the bearing seat by bolts.

However, during the disassembly and assembly process of the bearing cap, due to reasons such as the certain elasticity of the positioning pin itself, the bearing cap is prone to positioning deviation. Therefore, the bearing cap that is installed twice cannot ensure the shape of the main shaft hole, and it is easy to produce the main shaft. The hole is out of round, which will lead to eccentric wear, vibration, noise and other phenomena when the crankshaft is running. In addition, it will also cause laborious installation, and the joint between the bearing cover and the bearing housing will not be tight, resulting in failure of the bearing.

In order to reduce the positioning deviation of the bearing cap and overcome the above-mentioned shortcomings, the following methods are usually adopted in the prior art:

Add side pull bolts to secure the bearing caps to other suitable parts of the engine block to limit displacement of the bearing caps relative to the bearing housings, or alternatively, use higher strength fastening bolts to secure the bearing caps to the bearing housings , and at the same time install the positioning pin sleeve to position the bearing cap; or: process the positioning spigot on the bearing seat, and position the bearing cap through the interference fit between the spigot surface and the bearing cap; moreover: between the bearing cap and the bearing Strip protrusions are arranged on the mating surface of the seat, and the bearing cover is positioned through the plastic deformation of the protrusions.

However, the use of the first method has the problem of increasing the number of parts and the weight of the whole machine, and the side pull bolts need to add bolt holes in other suitable parts of the engine block, so it is easy to cause additional bolt holes. The risk of gas or liquid leakage inside the engine; in addition, for the way of using the positioning pin sleeve, due to the certain elasticity of the positioning pin sleeve itself, the positioning pin sleeve is also likely to cause positioning deviation of the bearing cover during installation, so that it cannot Ensure the shape of the spindle hole. When using the second method, since the force on both sides of the spigot is uneven, the deformation of the same material is different under the action of uneven force, so the shape of the spindle hole cannot be guaranteed. . For the third method, since the protrusion is a strip-shaped protrusion extending from the front of the bearing cap to the rear on the mounting surface of the bearing cap parallel to the axial direction of the main shaft hole, it can only be used in certain specific directions, such as In the direction parallel to the mounting surface of the bearing cap and perpendicular to the length direction of the strip-shaped protrusion, the displacement of the bearing cap is restricted; in addition, the principle of this method is: when the spindle hole is processed, the protrusion crushes the installation of the bearing seat. When the bearing cap is reassembled, the bearing cap is positioned by matching the protrusions and the dents. However, since the protrusions are strip-shaped, it is easy to cause the bearing seat to collapse when the bearing seat is crushed. There is a gap at the edge of the bearing cap, which leads to a safety hazard of stress concentration in the bearing seat. In addition, when the shape and cross-sectional structure of the protrusion are irregular and/or the hardness is insufficient, the installation of the bearing seat during the secondary assembly of the bearing cap It is easy to have a second dent on the surface that does not match the previous dent, and there is a gap between the mounting surface of the bearing seat and the bearing cap. Therefore, this method cannot position the bearing cap well to ensure that the spindle The shape of the hole.

To sum up, there is a defect in the prior art that the positioning deviation of the bearing cover cannot be effectively reduced to ensure the shape of the main shaft hole.

Utility model content

In view of this, the utility model aims to provide a bearing seat assembly to improve the positioning deviation of the bearing cover, thereby ensuring the shape of the main shaft hole and optimizing the operating environment of the shaft.

In order to achieve the above object, the technical solution of the utility model is achieved in that:

A bearing seat assembly, the bearing seat assembly includes a bearing seat and a bearing cover detachably fixedly connected to the bearing seat through fastening bolts, the bearing seat has a first mounting surface, and the bearing cover has a The first installation surface is attached to the second installation surface, wherein a protrusion is provided on one of the first installation surface and the second installation surface, and the first installation surface and the second installation surface On the other one, a depression is formed by crushing the protrusion at a position corresponding to the protrusion, and the press fit between the protrusion and the depression can limit the bearing cover relative to the bearing seat. Relative movement in any direction in said first mounting surface.

Further, the protrusion is formed on the second mounting surface, and the hardness of the material of the bearing cap is greater than that of the material of the bearing seat.

Further, the protruding portion is adjacent to the center of the bonding area between the first installation surface and the second installation surface and avoids the fastening bolts.

Further, the protruding portion includes a plurality of protrusions, and the plurality of protrusions are evenly arranged around the fastening bolt.

Further, the extension contour of the protrusion on the second installation surface is closed.

Further, the protrusion is arranged around the fastening bolt.

Further, the extension contour of the protrusion on the second installation surface is circular.

Further, the cross-section of the protruding part is formed in a circular arc shape.

Compared with the prior art, the bearing seat assembly described in the utility model has the following advantages:

When the bearing cover of the bearing seat assembly described in the utility model is installed on the bearing seat for the first time, the protruding part crushes the recessed part, and when the bearing cap of the bearing seat assembly is installed on the bearing seat for the second time, the protruding part is received in the recessed part And press fit with the recessed part, which can limit the installation position of the bearing cap to be consistent with its initial installation, and the relative movement of the bearing cap in all directions on the first mounting surface can be restricted by the press fit of the protruding part and the recessed part Therefore, the bearing block assembly provided by the utility model can improve the positioning deviation of the bearing cover, effectively ensure the shape of the main shaft hole, and greatly reduce the phenomenon of eccentric wear, vibration and noise during the operation of the shaft.

Another object of the present invention is to provide an engine to improve the bonding tightness between the bearing cover and the mounting surface of the bearing seat, and effectively avoid bearing failure.

In order to achieve the above object, the technical solution of the utility model is achieved in that:

An engine is provided with a crankshaft and a bearing seat assembly, the crankshaft is rotatably mounted on the bearing seat assembly, wherein the bearing seat assembly is the above-mentioned bearing seat assembly.

Compared with the prior art, the bearing seat assembly described in the utility model has the following advantages:

The engine described in the utility model is provided with the above-mentioned bearing block assembly, so it not only has the same advantages as above, but also can effectively improve the operating environment of the crankshaft, improve the power performance, and prolong the service life.

Other features and advantages of the present utility model will be described in detail in the following specific embodiments.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a three-dimensional schematic diagram of a bearing cap of a bearing block assembly described in an embodiment of the present invention;

Fig. 2 is a three-dimensional schematic diagram of a bearing cap of a bearing seat assembly according to another embodiment of the present invention;

Fig. 3 is a three-dimensional schematic diagram of the bearing seat of the bearing seat assembly described in the embodiment of the present invention;

Fig. 4 is a schematic cross-sectional view of the bearing seat assembly described in the embodiment of the present invention.

Explanation of reference signs:

1 bearing seat; 11 first mounting surface; 12 first bolt hole; 2 bearing cap; 21 second mounting surface; 22 second bolt hole; 3 main shaft hole; 4 protrusion; 5 recess.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. In addition, for the convenience of description, the bearing seat assembly in the present utility model is a bearing seat assembly used for crankshaft and bearing in the engine, correspondingly, a main shaft hole 3 is arranged on it to cooperate with the bearing. However, it can be understood that the bearing block assembly provided by the present invention can also have other different uses, and the present invention does not specifically limit it.

On the one hand, according to a specific embodiment of the present utility model, a bearing seat assembly is provided, the bearing seat assembly includes a bearing seat 1 and a bearing cap 2 detachably fixedly connected to the bearing seat 1 through fastening bolts, the The bearing seat 1 has a first mounting surface 11, and the bearing cover 2 has a second mounting surface 21 that can be attached to the first mounting surface 11, wherein the first mounting surface 11 and the second mounting surface A protrusion 4 is provided on one of the surfaces 21, and the other of the first installation surface 11 and the second installation surface 21 is crushed by the protrusion 4 at a position corresponding to the protrusion 4 A recessed portion 5 is formed, and the pressing fit between the protruding portion 4 and the recessed portion 5 can limit the relative movement of the bearing cover 2 relative to the bearing seat 1 in any direction on the first mounting surface 11 .

The bearing block assembly provided by the utility model is provided with the protruding part 4 on the first mounting surface 11 or the second mounting surface 21. When the bearing cover 2 is installed on the bearing seat 1 for the first time, the protruding part 4 will crush the other mounting surface. surface and form a recess 5 thereon, so that when the bearing cover 2 is installed on the bearing seat 1 again, the protruding part 4 can be received and accommodated in the recess 5, so that the installation position of the bearing cover 2 is the same as when it was first installed. The installation positions are the same, and the pressing fit between the protruding part 4 and the recessed part 5 can limit the movement of the bearing cap 2 on the first mounting surface 11 towards various directions, which can ensure the shape of the main shaft hole 3 (described below), Ensuring the accuracy of the main shaft hole 3 improves the impact load resistance of the bearing cover and effectively reduces the deformation of the main shaft hole 3, thus avoiding the odds of eccentric wear and vibration during crankshaft operation to the greatest extent.

The utility model will be described in detail below with reference to Fig. 1 to Fig. 4 and in conjunction with embodiments.

Generally, the protrusion 4 is formed on the second mounting surface 21 , and the hardness of the material of the bearing cover 2 is greater than that of the material of the bearing seat 1 . Therefore, for the convenience of description, the specific implementation of the protrusion 4 formed on the second mounting surface 21 will be used as an example to describe the bearing seat assembly provided by the present invention in detail, but the present invention is not limited thereto. The portion 4 may also be formed on the first mounting surface 11 .

In the specific embodiment provided by the present invention, the protruding part 4 can be formed at any position on the second mounting surface 21. Preferably, as shown in FIGS. 1 to 4, the protruding part 4 is located adjacent to the second A mounting surface 11 and the center position of the bonding area of the second mounting surface 21 and avoiding the fastening bolts, in this case, the setting of the protruding part 4 will not crush the first mounting surface when the protruding part 4 surface 11 and forming the recessed portion 5 thereon causes stress concentration on the edge of the first installation surface 11, avoiding cracks and debris at the edge of the first installation surface 11 due to crush deformation, and At the same time, the protruding part 4 can also ensure that the bearing cover 2 can be prevented from moving freely on the first mounting surface 11 when it is press-fitted with the recessed part 5 .

Certainly, in the specific embodiment provided by the present utility model, as long as the above-mentioned function can be satisfied, the protruding part 4 can be arranged in any suitable form, for example, the protruding part 4 includes a plurality of protrusions, and the plurality of protrusions surround the The above fastening bolts are evenly arranged.

In addition, the setting of the protruding part 4 can also be in the form: the extension contour line of the protruding part 4 on the second installation surface 21 is closed, referring to Fig. 1 and Fig. 2, the protruding part 4 can be a closed ring shape, or a closed polygonal shape.

In the above specific embodiments, in order to enhance the positioning effect of the bearing cover 1, the protrusion 4 can be arranged around the fastening bolt, and there are many ways to arrange the protrusion 4 around the fastening bolt, for example: the protrusion 4 can be arranged in the manner shown in FIG. 1 , that is, a plurality of annular and polygonal protrusions 4 are scattered and arranged on the second mounting surface 21 centered on the fastening bolt. In addition, in order to enhance the positioning effect near the fastening bolt and reduce the shear stress on the fastening bolt, the protruding part 4 can also be arranged as shown in Figure 2, that is, a circular protruding part 4 surrounds a Fasten the bolt and surround the fastening bolt. Correspondingly, the depression 5 formed by the protrusion 4 on the first installation surface 11 surrounds and surrounds a fastening bolt, as shown in FIG. 3 Show. It should be noted here that, in addition to the annular shape and the polygonal shape, the protruding portion 4 can also be provided in other forms as shown in FIGS. 1 and 2 .

In addition, in order to ensure the shape of the protrusion 4 when the protrusion 4 crushes the first mounting surface 11 to form the recess 5, the cross section of the protrusion 4 is formed in an arc shape to avoid local stress concentration . It should be noted here that the “cross section” refers to the direction perpendicular to the extension of the protruding portion 4 on the second installation surface 21 , that is, the direction perpendicular to the second installation surface 21 .

Furthermore, in order to facilitate the illustration, the fastening bolts are not shown in Fig. 1 to Fig. 4, but the first bolt holes 12 and the second bolt holes 22 matched with the fastening bolts are shown, therefore, in In the above, when "the protruding part 4 avoids the fastening bolt" corresponds to Fig. 1 to Fig. 4, it should be understood as "the protruding part 4 avoids the first bolt hole 12 and the second bolt hole 22"; similarly, When "the protruding part 4 is arranged around the fastening bolt" above corresponds to Fig. 1 to Fig. 4 , it should be understood as "the protruding part 4 is arranged around the first bolt hole 12 and/or the second bolt hole 22".

On the other hand, the utility model also provides an engine, the engine is provided with a crankshaft and a bearing assembly, the crankshaft is rotatably mounted on the bearing assembly, wherein the bearing assembly is provided by the utility model Bearing housing assembly. Specifically, referring to Fig. 4, in the specific embodiment of the engine provided by the utility model, the crankshaft is rotatably installed in the main shaft hole 3 formed on the bearing seat assembly through the bearing, according to the utility model described above The advantages of the bearing seat assembly, the engine provided with this bearing seat assembly can provide a good operating environment for the crankshaft, improve the power performance of the engine, and prolong the service life of the engine. This engine can be applied to different fields, for example, when this engine is applied to a vehicle, based on the above advantages of the engine, this vehicle will have better NVH performance and safety performance.

To sum up, in the bearing seat assembly provided by the utility model, the main parts that play a role in improving the positioning deviation of the bearing cover are the protrusion and the depression formed by the collapse of the protrusion. Through the compression of the protrusion and the depression The fit can limit the movement of the bearing cover in any direction on the mounting surface of the bearing seat, thereby ensuring the shape of the main shaft hole, and further, ensuring the operating environment of the crankshaft or other shafts. In addition, since the protruding part and the recessed part are respectively formed on the bearing cap and the bearing seat, they are integrally formed with the bearing cap and the bearing seat respectively, so the manufacturing process is relatively simple, which means that there is no need to add other Therefore, the bearing seat assembly provided by the utility model can also meet the design requirements of light weight, integration and low cost.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (9)

1. Bearing seat assembly, the bearing seat assembly includes a bearing seat (1) and a bearing cover (2) detachably fixedly connected to the bearing seat (1) by fastening bolts, the bearing seat (1) has The first installation surface (11), the bearing cover (2) has a second installation surface (21) that can be attached to the first installation surface (11), it is characterized in that the first installation surface (11) and one of the second mounting surface (21) is provided with a protruding portion (4), and the other of the first mounting surface (11) and the second mounting surface (21) is on the same surface as the The position corresponding to the protruding part (4) is crushed to form a recessed part (5) by the protruding part (4), and the compression fit between the protruding part (4) and the recessed part (5) can limit the Relative movement of the bearing cover (2) relative to the bearing seat (1) in any direction on the first mounting surface (11). 2. The bearing seat assembly according to claim 1, characterized in that, the protrusion (4) is formed on the second mounting surface (21), and the hardness of the material of the bearing cap (2) is greater than the The hardness of the material of the bearing housing (1). 3. The bearing seat assembly according to claim 2, characterized in that, the protruding part (4) is adjacent to the center of the bonding area between the first mounting surface (11) and the second mounting surface (21) And avoid the fastening bolts. 4. The bearing seat assembly according to claim 2, characterized in that, the protrusion (4) comprises a plurality of protrusions, and the plurality of protrusions are evenly arranged around the fastening bolt. 5. The bearing seat assembly according to claim 2, characterized in that, the extension contour of the protrusion (4) on the second mounting surface (21) is closed. 6. The bearing seat assembly according to claim 5, characterized in that the protrusion (4) is arranged around the fastening bolt. 7. The bearing seat assembly according to claim 5 or 6, characterized in that, the extension contour of the protrusion (4) on the second mounting surface (21) is circular. 8. The bearing seat assembly according to claim 5 or 6, characterized in that, the cross-section of the protrusion (4) is formed in a circular arc shape. 9. An engine, the engine is provided with a crankshaft and a bearing assembly, the crankshaft is rotatably mounted on the bearing assembly, characterized in that, the bearing assembly is according to any one of claims 1-8 The bearing housing assembly.