Crankshaft box body supporting structure

Abstract

The utility model relates to the technical field of engines, in particular to a crankshaft box body supporting structure which comprises a plurality of supporting lugs, the supporting lugs are arranged on the lower side portion of a crankshaft box body, the supporting lugs and the crankshaft box body are integrally formed, and the supporting lugs extend in the axial direction and the radial direction of a crankshaft respectively to support the crankshaft box body. Supporting lug connecting holes and fan cover connecting holes are integrally formed in the set of supporting lugs located on the motor side. According to the scheme, the vibration synchronism between the crankcase cover and the crankcase body is better, the connection between the crankcase cover and the crankcase body is more stable, oil leakage is not prone to happening to the connecting face of the crankcase cover and the crankcase body, an engine can be more conveniently installed on a rack through the crankcase body supporting structure, and the engine runs more stably after being installed.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a crankcase supporting structure. Background Art

[0002] Generator sets are widely used in industrial and agricultural production, national defense, science and technology, and daily life. The working principle of the generator set is based on the law of electromagnetic induction and the law of electromagnetic force. The energy generated by water flow, air flow, and fuel combustion is converted into mechanical energy, which is then converted into electrical energy by the generator and output to the electrical equipment for use. The generator set is mainly composed of a power system, a control system, a silencer system, a shock absorption system, and an exhaust system. The variable frequency generator set uses an engine as a power source to drive the motor to generate electricity, and the center of gravity of the entire engine is located on the engine crankcase. In the prior art, the main installation methods of the engine and the frame include: setting a support structure at the bottom of the crankcase. The disadvantage of this installation method is that the vertical installation method will increase the height of the entire engine compared to the frame, thereby reducing the stability of the engine operation. In addition, the vertical installation method also has the problem of inconvenient installation and operation because it is necessary to install connecting bolts and other structures at the bottom of the frame; the support structure is set at the bottom of the crankcase and the bottom of the fan cover. The disadvantage of this installation method is that the fan cover is easy to deform, and the strength requirements of the fan cover are high, and the material requirements are high, which will undoubtedly increase the manufacturing cost of the fan cover. The cost is caused by respectively setting supporting structures on the crankcase body and the crankcase cover. However, the disadvantage of this installation method is that the crankcase body is connected to the frame alone, and the crankcase cover is connected to the frame alone. Since the engine will vibrate when running, the vibration will be indirectly transmitted to the frame, and the vibration of the frame and the crankcase body are not synchronized. Since the crankcase cover and the frame are also connected, the vibration of the frame will also be indirectly transmitted to the crankcase cover, resulting in poor vibration synchronization between the crankcase cover and the crankcase body. Therefore, it is easy to cause poor connection stability and sealing between the crankcase cover and the crankcase body, and the connection surface between the crankcase cover and the crankcase body is prone to oil leakage. Utility Model Content

[0003] The utility model aims to provide a crankcase supporting structure. The crankcase supporting structure of the utility model is adopted to more conveniently install an engine on a frame, and the engine runs more stably after installation.

[0004] The crankcase support structure includes a plurality of ears, which are all arranged on the lower side of the crankcase and are integrally formed with the crankcase. The plurality of ears extend along the axial and radial directions of the crankshaft to support the crankcase, and a group of ears located on the motor side are integrally formed with ear connection holes and fan cover connection holes.

[0005] The beneficial effects of the utility model are as follows: 1. Multiple lugs are arranged on the lower side of the crankcase body. Compared with the method of respectively arranging the supporting structure on the crankcase body and the fan cover, the strength requirement for the fan cover can be reduced, and the manufacturing cost can be reduced. Compared with the method of respectively arranging the supporting structure on the crankcase body and the crankcase cover, the scheme of the utility model can make the vibration synchronization between the crankcase cover and the crankcase body better, the connection between the two is more stable, and the connection surface between the two is not easy to leak oil; 2. Multiple lugs extend along the axial direction and radial direction of the crankshaft to support the engine. Compared with the supporting structure arranged vertically at the bottom of the crankcase body, one On the one hand, after the engine is installed, the height of the entire engine can be lowered, the center of gravity of the engine can be lowered, and the engine can be more stable during operation. On the other hand, this horizontal lateral support method can be installed from the side during installation, which is more convenient to operate. Thirdly, the method of multiple lugs extending along the axial and radial directions of the crankshaft can be designed according to the actual needs of different types of engines. For example, the extension length and extension quantity can vary according to different types of engines, and try to ensure that the support center is consistent with the center of gravity of the entire engine, thereby improving the stability of the engine during operation. 3. A group of lugs located on the motor side are integrally formed with lug connection holes and fan cover connection holes. The fan cover connection holes and lug connection holes are formed on the lugs, which has a compact structure and is convenient for the installation of the fan cover and the crankcase. The lug connection holes and the fan cover connection holes are directly integrally formed with the crankcase, which has high production efficiency and higher strength.

[0006] Furthermore: a reinforcing rib is provided on each of the supporting ears.

[0007] The beneficial effect is that by arranging reinforcing ribs on each support lug, the connection strength between each support lug and the crankcase body and the frame can be further improved.

[0008] Furthermore: the interiors of the plurality of lugs are all hollow.

[0009] The beneficial effect is that each support ear is hollow inside, which not only saves materials and reduces costs, but also during the die-casting process, since the support ear itself is thick, if it is die-cast into a solid structure, it is easy to produce pores, thereby easily causing oil leakage inside the crankcase body. The design that the support ears are hollow will not produce pores during die-casting, which can avoid oil leakage inside the crankcase body.

[0010] Furthermore, a group of lugs which are aligned with the tilted cylinder head on the upper portion of the crankcase have a lateral horizontal extension length which is greater than a horizontal extension length of the lugs on the opposite side.

[0011] The beneficial effect is that since the cylinder head is located on the upper part of the crankcase and is inclined with respect to the crankcase, that is, the cylinder head is inclined to one side, the center of gravity of the entire engine will be inclined to the side where the cylinder head is inclined. In this solution, a group of lugs on the side facing the inclined cylinder head has a lateral extension length greater than the lateral extension length of the lugs on the opposite side, which can make the support center of the engine consistent with the center of gravity of the entire engine, so that after the engine is installed, the operation is more stable and the shock absorption effect is better.

[0012] Furthermore: a group of support ears close to the crankcase cover side include a first connecting column integrally formed with the crankcase body, and the first connecting columns located on both sides of the crankcase body extend to both sides of the crankcase body respectively, and support ear connecting holes are integrally formed on the first connecting columns.

[0013] The beneficial effect is that the first connecting columns located on both sides of the crankcase extend to both sides of the crankcase respectively, thereby realizing connection support for the crankcase in the horizontal radial direction of the crankshaft, and are installed in conjunction with a group of support ears located on the motor side to achieve better support effect.

[0014] Furthermore: a group of ears located on the motor side include an ear body, an integrally formed groove inside the ear body, the groove opening faces downward, an integrally formed fan cover mounting hole at the end of the ear body, an integrally formed second connecting column on the outer side of the ear body, and an ear connecting hole formed on the second connecting column.

[0015] The beneficial effect is that: in this scheme, a groove with an opening facing downward is integrally formed in the support ear body, so that the inside of the support ear body is hollowed out, which saves materials and can avoid the generation of air holes during die-casting, thereby preventing oil leakage during use. At the same time, a fan cover mounting hole is integrally formed at the end of the support ear body for installing the fan cover, and a second connecting column is integrally formed on the outer side of the support ear body, and a support ear connecting hole is formed on the second connecting column for connecting the support ear. The fan cover installation and the support ear installation positions are in different directions and do not interfere with each other during installation.

[0016] Furthermore, the lug body of one of the lugs located on the motor side extends radially outwardly along the crankshaft, and then smoothly transitions to extend axially toward the crankshaft.

[0017] The beneficial effect is that: since the motor is installed on the crankcase body, its position is more inclined to the crankcase cover side, so the lug body of one of the lugs on the motor side first extends horizontally outward along the crankshaft radial direction, thereby increasing the distance between the lug and the other lug on the motor side, leaving enough space for the fan cover to be installed. At the same time, such a design enables the motor as a whole to be located as much as possible in the horizontal middle position of the fan cover after the fan cover is installed on one side of the crankcase body, so that when the fan cover guides air, the motor, crankcase, cylinder head and other components can be more evenly dissipated. The lug body of one of the lugs on the motor side further extends axially toward the crankshaft, which can provide a connection position for the fan cover on the one hand, and cooperate with other lugs on the motor side on the other hand, and extend together on both sides of the crankshaft along the horizontal radial direction in the axial direction of the crankshaft to provide support for the entire crankcase body, and the support effect is better. The middle part of the lug body is a smooth transition, which can reduce stress concentration when local force is applied and extend the service life compared with the angled transition method.

[0018] Furthermore: there are four support ears, which are respectively arranged along the circumference of the lower part of the crankcase.

[0019] The beneficial effect is that: there are four support ears, which are respectively arranged along the circumference of the lower part of the crankcase body. After the crankcase body is installed, the circumferential force of the entire engine can be more balanced and the operation can be more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an embodiment of the crankcase supporting structure of the utility model. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to explain the present invention and will not limit the protection scope of the present invention.

[0022] The terms "first", "second" and the like in the specification, claims and embodiments of the present application are used to distinguish similar objects rather than to describe a specific order or sequential sequence.

[0023] The present invention is further described in detail below through preferred specific embodiments:

[0024] The figure marks in the drawings of the specification include: crankcase 1, first lug 101, lug body 1011, second connecting column 1012, fan cover connecting hole 1013, second lug 102, third connecting column 1021, third lug 103, second connecting column 1031, fourth lug 104, reinforcing rib 105, cylinder head 2.

[0025] As attached Figure 1As shown: the crankcase support structure includes a plurality of lugs, which are arranged at the lower side of the crankcase 1 and are integrally formed with the crankcase 1. Specifically, there are four lugs, which are arranged along the circumference of the lower part of the crankcase 1. The plurality of lugs extend along the axial direction and radial direction of the crankshaft to support the crankcase 1, and a group of lugs located on the motor side are integrally formed with lug connection holes and fan cover connection holes 1013. The plurality of lugs are hollow inside. A reinforcing rib 105 is provided on each lug.

[0026] One side of the crankcase body 1 is installed with the motor, and the other side opposite to it is installed with the crankcase cover. Figure 1 The side of the crankcase 1 facing the motor is shown. In this embodiment, a group of lugs located on the motor side are respectively the first lug 101 and the second lug 102, and the lugs close to the crankcase cover are respectively the third lug 103 and the fourth lug 104. A group of lugs that are aligned with the tilted cylinder head 2 on the upper part of the crankcase 1 have a lateral horizontal extension length greater than the horizontal extension length of the lugs on the opposite side. In this embodiment, specifically, the lateral horizontal extension length of the second lug 102 and the fourth lug 104 is greater than the lateral horizontal extension length of the first lug 101 and the third lug 103.

[0027] In this embodiment, the first ear 101 includes an ear body 1011, a groove is integrally formed inside the ear body 1011, and the opening of the groove faces downward. A fan cover mounting hole is integrally formed at the end of the ear body 1011, and a second connecting column 1012 is integrally formed on the outer side of the ear body 1011. An ear connecting hole is formed on the second connecting column 1012. The ear body 1011 of the first ear 101 extends radially outwardly along the crankshaft and then smoothly transitions to extend axially toward the crankshaft. The reinforcing rib 105 on the first ear 101 has the same curvature as the ear body 1011. The second ear 102 includes an ear body 1011 integrally formed with the crankcase body 1, the ear body 1011 extends axially along the crankshaft, a fan cover connecting hole 1013 is formed at the end of the ear body 1011, a third connecting column 1021 is integrally formed on the side of the ear body 1011, and an ear connecting hole is formed on the third connecting column 1021, wherein the ear connecting holes on the first ear 101 and the second ear 102 face opposite directions.

[0028] In this embodiment, the third lug 103 and the fourth lug 104 both include a first connecting column integrally formed with the crankcase 1, the first connecting columns located on both sides of the crankcase 1 extend to both sides of the crankcase 1 respectively, and lug connecting holes are integrally formed on the first connecting columns, and the lug connecting holes on the third lug 103 and the fourth lug 104 face opposite directions. The preferred embodiments of the present application are described in detail above in conjunction with the accompanying drawings, and typical well-known structures and well-known common sense technologies in the preferred embodiments are not described in detail here. Ordinary technicians in the relevant field can improve and implement the technical solution of the utility model under the enlightenment given by this embodiment and in combination with their own abilities. Some typical well-known structures, well-known methods or well-known common sense technologies should not become obstacles for ordinary technicians in the relevant field to implement the present application.

[0029] The scope of protection required by this application shall be based on the contents of its claims, and the contents of the utility model, specific implementation methods and the contents recorded in the drawings of the specification shall be used to interpret the claims.

[0030] Within the technical concept of the present application, several modifications may be made to the specific implementation methods of the present application, and these modified specific implementation methods should also be regarded as within the protection scope of the present application.

Claims

1. The crankcase support structure is characterized by: It includes a plurality of ears, which are all arranged on the lower side of the crankcase and are integrally formed with the crankcase. The plurality of ears extend along the axial and radial directions of the crankshaft to support the crankcase, and a group of ears located on the motor side are integrally formed with ear connection holes and fan cover connection holes.

2. The crankcase support structure according to claim 1, characterized in that: A reinforcing rib is provided on each of the supporting ears.

3. The crankcase support structure according to claim 1, characterized in that: The interiors of the plurality of ears are all hollow.

4. The crankcase support structure according to claim 1, characterized in that: A set of lugs which are aligned with the tilted cylinder head at the upper portion of the crankcase have a lateral horizontal extension length which is greater than a horizontal extension length of the lugs on the opposite side.

5. The crankcase support structure according to claim 1, characterized in that: A group of lugs near the crankcase cover side include a first connecting column integrally formed with the crankcase body. The first connecting columns located on both sides of the crankcase body extend to both sides of the crankcase body respectively, and lug connecting holes are integrally formed on the first connecting columns.

6. The crankcase support structure according to claim 1, characterized in that: A group of ears located on the motor side include an ear body, an integrally formed groove inside the ear body, the groove opening faces downward, an integrally formed fan cover mounting hole at the end of the ear body, an integrally formed second connecting column on the outer side of the ear body, and an ear connecting hole formed on the second connecting column.

7. The crankcase support structure according to claim 6, characterized in that: The lug body of one of the lugs located on the motor side extends outwardly in the radial direction of the crankshaft, and then smoothly transitions to extend axially toward the crankshaft.

8. The crankcase support structure according to any one of claims 1 to 7, characterized in that: There are four support ears, which are respectively arranged along the circumference of the lower part of the crankcase body.

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