CN219061791U - an engine - Google Patents

Abstract

The application relates to the technical field of power systems, in particular to an engine. The engine comprises an oil pump, a vacuum pump and a driving shaft penetrating the oil pump and the vacuum pump, wherein the driving shaft is provided with an oil conveying channel penetrating an oil cavity of the oil pump and a vacuum cavity of the vacuum pump. The engine saves space by integrating the vacuum pump and the oil pump; in addition, the vacuum pump and the oil pump are coaxially arranged, and the driving shaft is provided with an oil conveying channel so as to convey engine oil in the engine oil chamber to the vacuum chamber, so that lubrication of the vacuum pump is realized, an external oil way is not required to be additionally arranged, the number of parts is reduced, and the arrangement difficulty is reduced.

Description

an engine

technical field

The present application relates to the technical field of power systems, in particular to an engine.

Background technique

The engine includes an oil pump and a vacuum pump. The oil pump is mostly arranged at the lower end of the engine block. The function of the oil pump is to increase the oil to a certain pressure, and then forcefully press it to the moving surface of each part of the engine. The vacuum pump is usually arranged on the cylinder head, and the function of the vacuum pump is to generate negative pressure, thereby increasing the braking force.

The oil pump and the vacuum pump of the existing engine are arranged far away, and the vacuum pump and the oil pump are connected through an external oil circuit, so that the oil in the oil pump is delivered to the vacuum pump to realize the lubrication of the vacuum pump. In the engine with the above structure, the oil pump and the vacuum pump are arranged separately, occupying a large space, having many parts and components, and making the arrangement difficult.

Utility model content

The present application discloses an engine to solve the problems that the vacuum pump and the oil pump in the existing engine are arranged separately, require an additional external oil circuit, occupy a large space and are difficult to arrange.

In order to achieve the above object, the application provides the following technical solutions:

In a first aspect, the present application provides an engine, which includes an oil pump, a vacuum pump, and a drive shaft that passes through the oil pump and the vacuum pump, and the drive shaft is provided with an oil delivery system that passes through the oil chamber of the oil pump and the vacuum chamber of the vacuum pump. aisle.

Further, along the axial direction of the drive shaft, the drive shaft includes a first shaft segment and a second shaft segment connected to the first shaft segment; the oil pump is sleeved on the first shaft segment, and the vacuum pump is sleeved on the second shaft segment.

Further, the oil delivery channel includes a main channel extending axially along the drive shaft, and an oil inlet hole provided on the first shaft section, and the oil inlet hole communicates with the main channel and the oil chamber.

Further, the oil delivery channel also includes a first oil outlet hole provided on the second shaft section, and the first oil outlet hole communicates with the main channel and the vacuum chamber.

Further, the engine also includes an integrated housing, a first end cover and a second end cover, and the integrated housing, the first end cover and the second end cover form a sealed chamber, and an oil pump and a vacuum pump are arranged in the sealed chamber; One end cover is located on the side of the vacuum pump facing away from the oil pump, and the second end cover is located on the side of the oil pump facing away from the vacuum pump.

Further, the drive shaft also includes a third shaft section connected to the second shaft section, the first end cover is provided with a through hole passing through the third shaft section, the third shaft section is provided with a second oil outlet hole, and the second outlet The oil hole communicates with the main channel and the through hole.

Further, a seal is provided between the third shaft segment and the first end cover.

Further, the surface of the shaft hole of the oil pump for passing through the first shaft section is provided with a groove, and the groove communicates with the oil chamber.

Further, the engine also includes a crankshaft, the sealed chamber is located below the crankshaft, and the crankshaft and the drive shaft are connected through a chain drive assembly.

Further, the drive shaft is a rigid shaft.

In the engine provided by the present application, the oil pump and the vacuum pump are driven by the same drive shaft, and the drive shaft is provided with an oil delivery channel passing through the oil chamber and the vacuum chamber, and the oil in the oil pump chamber can enter the engine through the oil delivery channel. The vacuum chamber of the vacuum pump lubricates the parts in the vacuum pump. The engine in this application saves space by integrating the vacuum pump and the oil pump; in addition, the vacuum pump and the oil pump are coaxially arranged and the drive shaft is provided with an oil delivery channel to transfer the oil in the oil chamber to the vacuum chamber. In this way, the lubrication of the vacuum pump is realized without additional external oil circuits, reducing the number of components and reducing the difficulty of layout.

Description of drawings

Fig. 1 is a schematic structural view of a coaxial arrangement of an oil pump and a vacuum pump according to an embodiment of the present application;

Fig. 2 is the front view of the engine of an embodiment of the present application;

Fig. 3 is the rear view of the engine of an embodiment of the present application;

Fig. 4 is the sectional view of B-B place in Fig. 3;

Fig. 5 is a partial enlarged view of place A in Fig. 4;

Fig. 6 is a schematic structural view of a drive shaft according to an embodiment of the present application;

Fig. 7 is a schematic structural diagram of a first sprocket according to an embodiment of the present application.

Figure number:

100-oil pump; 200-vacuum pump; 300-drive shaft; 310-first shaft section; 320-second shaft section; 330-third shaft section; 400-integrated shell; 500-first end cover; 600-the first Two end covers; 700-seals; 800-chain drive assembly; 810-first sprocket; 811-bulge; 820-chain; 830-second sprocket; 900-crankshaft; 1000-bolt;

01-oil chamber; 02-vacuum chamber; 03-main channel; 04-oil inlet; 05-first oil outlet; 06-second oil outlet; 07-grooving; 08-groove.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The oil pump and vacuum pump in the existing engine are arranged far away, and the vacuum pump needs to be connected to an external oil circuit to realize the lubrication of the vacuum pump. The engine with this structure takes up a lot of space and has many parts, making it difficult to arrange.

In view of this, an embodiment of the present application provides an engine. FIG. 1 is a schematic structural view of a coaxial arrangement of an oil pump and a vacuum pump according to an embodiment of the present application. FIG. 2 is a front view of an engine according to an embodiment of the present application. Fig. 3 is a rear view of the engine of an embodiment of the present application, Fig. 4 is a cross-sectional view at B-B in Fig. 3, and Fig. 5 is a partial enlarged view at A in Fig. 4, referring to Fig. 1 to Fig. 5 together, the The engine includes an oil pump 100, a vacuum pump 200, and a drive shaft 300 passing through the oil pump 100 and the vacuum pump 200. The drive shaft 300 is provided with an oil delivery channel that runs through the oil chamber 01 of the oil pump 100 and the vacuum chamber 02 of the vacuum pump 200.

Preferably, the oil pump 100 and the vacuum pump 200 are integrated in the oil pan of the engine.

FIG. 6 is a schematic structural view of a drive shaft according to an embodiment of the present application. Referring to FIG. 6 , along the axial direction of the drive shaft 300, the drive shaft 300 includes a first shaft segment 310 and a second shaft connected to the first shaft segment 310 Segment 320 ; the oil pump 100 is sleeved on the first shaft segment 310 , and the vacuum pump 200 is sleeved on the second shaft segment 320 . Wherein, the first shaft section 310 and the second shaft section 320 may be of an integral structure or of a split structure.

Referring to Figures 4 to 6, the oil delivery channel includes a main channel 03 extending axially along the drive shaft 300, and an oil inlet hole 04 provided on the first shaft section 310, the oil inlet hole 04 communicates with the main channel 03 and the oil chamber 01 , so that the oil in the oil chamber 01 enters the main channel 03 through the oil inlet hole 04 .

In an optional solution of this embodiment, the oil delivery channel also includes a first oil outlet hole 05 arranged on the second shaft section 320, and the first oil outlet hole 05 communicates with the main channel 03 and the vacuum chamber 02, so that the main channel 03 The oil in the vacuum chamber enters the vacuum chamber 02 through the first oil outlet hole 05 to lubricate the vacuum pump 200 .

Wherein, the number of the first oil outlet holes 05 is not limited in this application. Preferably, the number of the first oil outlet holes 05 is two, and the two first oil outlet holes 05 are symmetrically arranged on both sides of the main channel 03 .

Continuing to refer to FIG. 2 to FIG. 5, the engine further includes an integrated housing 400, a first end cover 500 and a second end cover 600, and the integrated housing 400, the first end cover 500 and the second end cover 600 form a sealed chamber, The oil pump 100 and the vacuum pump 200 are located in the sealed chamber; the first end cover 500 is located on the side of the vacuum pump 200 facing away from the oil pump 100 , and the second end cover 600 is located on the side of the oil pump 100 facing away from the vacuum pump 200 .

Continuing to refer to FIG. 5 and FIG. 6 , the drive shaft 300 also includes a third shaft segment 330 connected to the second shaft segment 320 , the first end cover 500 is provided with a through hole passing through the third shaft segment 330 , and the third shaft segment 330 A second oil outlet hole 06 is provided, and the second oil outlet hole 06 communicates with the main channel 03 and the through hole, so that the oil in the main channel 03 can enter the through hole through the second oil outlet hole 06, thereby lubricating the third shaft section 330 The contact surface between the hole and the through hole, thereby reducing friction and prolonging the service life of the part.

Wherein, the number of the second oil outlet holes 06 is not limited in this application. Preferably, the number of the second oil outlet holes 06 is two, and the two second oil outlet holes 06 are symmetrically arranged on both sides of the main channel 03 .

Continuing to refer to FIG. 4 and FIG. 5 , a seal 700 is provided between the third shaft segment 330 and the first end cover 500 , so as to prevent the oil in the sealed chamber from leaking. Wherein, the seal 700 is preferably an annular seal 700 sleeved on the third shaft section 330 . The material of the sealing member 700 is not limited in this application, and may be nitrile rubber, fluororubber, silicon rubber, acrylic rubber, polyurethane or polytetrafluoroethylene.

In an optional solution of this embodiment, the surface of the shaft hole of the oil pump 100 for passing through the first shaft section 310 is provided with a slot 07, and the slot 07 communicates with the oil chamber 01, so as to achieve the first shaft section 310 surface lubrication.

The existing vacuum pump 200 is usually driven by gears, and the noise is relatively high.

In view of this, referring to Fig. 2 to Fig. 5 together, the engine in the embodiment of the present application further includes a crankshaft 900, the sealed chamber is located below the crankshaft 900, and the crankshaft 900 and the drive shaft 300 are connected by a chain drive assembly 800, effectively reducing noise .

Wherein, the chain transmission assembly 800 includes a first sprocket 810 , a second sprocket 830 and a chain 820 . The first sprocket 810 is arranged on the side of the first end cover 500 facing away from the vacuum pump 200 and the first sprocket 810 is sleeved on the drive shaft 300, and the second sprocket 830 is sleeved on the rotating shaft of the crankshaft 900. The first chain The wheel 810 and the second sprocket 830 are connected by a chain 820, the crankshaft 900 drives the second sprocket 830 to rotate, the second sprocket 830 drives the first sprocket 810 to rotate through the chain 820, and the first sprocket 810 drives the drive shaft 300 to rotate, Thus, the vacuum pump 200 and the oil pump 100 are driven to rotate by the drive shaft 300 .

FIG. 7 is a schematic structural view of a first sprocket according to an embodiment of the present application. Referring to FIG. A groove 08 corresponding to the above-mentioned raised portion 811 is provided on the surface thereof, and the firmness of the connection between the first sprocket 810 and the drive shaft 300 is improved through the cooperation of the raised portion 811 and the groove 08 .

Continuing to refer to FIG. 1, FIG. 2, FIG. 4 and FIG. 5, the first sprocket 810 and the drive shaft 300 are connected by bolts 1000, thereby further enhancing the firmness of the connection between the first sprocket 810 and the drive shaft 300, so as to The first sprocket 810 drives the driving shaft 300 to rotate.

In an optional solution of this embodiment, the drive shaft is a rigid shaft, preferably, the drive shaft is made of 40cr alloy steel. The role of the rigid shaft is to increase the pressure bearing capacity of the drive shaft.

In summary, the engine in the embodiment of the present application has the following beneficial effects:

1) By integrating the oil pump and the vacuum pump, and both are driven by the same drive shaft, space is saved;

2) The drive shaft is provided with an oil delivery channel that runs through the oil chamber and the vacuum chamber. The oil in the oil pump chamber can enter the vacuum chamber of the vacuum pump through the oil delivery channel to lubricate the parts in the vacuum pump without additional external connections. Oil circuit, reducing the number of components and reducing the difficulty of layout;

3) The drive shafts of the vacuum pump and the oil pump are rotated by the crankshaft through the chain transmission assembly. Compared with the gear drive, the chain transmission assembly can significantly reduce noise.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. The engine is characterized by comprising an oil pump, a vacuum pump and a driving shaft penetrating through the oil pump and the vacuum pump, wherein the driving shaft is provided with an oil conveying channel penetrating through an oil chamber of the oil pump and a vacuum chamber of the vacuum pump.

2. The engine of claim 1, wherein the drive shaft includes a first shaft section and a second shaft section connected to the first shaft section in an axial direction of the drive shaft;

the oil pump is sleeved on the first shaft section, and the vacuum pump is sleeved on the second shaft section.

3. The engine of claim 2, wherein the oil delivery passage includes a main passage extending axially along the drive shaft, and an oil inlet provided to the first shaft section, the oil inlet communicating the main passage with the oil chamber.

4. The engine of claim 3, wherein the oil delivery passage further comprises a first oil outlet provided in the second shaft section, the first oil outlet communicating the main passage and the vacuum chamber.

5. The engine of claim 3 or 4, further comprising an integrated housing, a first end cap, and a second end cap, the integrated housing, the first end cap, and the second end cap enclosing a sealed chamber, the oil pump and the vacuum pump being disposed within the sealed chamber;

the first end cover is located on one side, away from the oil pump, of the vacuum pump, and the second end cover is located on one side, away from the vacuum pump, of the oil pump.

6. The engine of claim 5, wherein the drive shaft further comprises a third shaft section connected to the second shaft section, the first end cap is provided with a through hole penetrating the third shaft section, the third shaft section is provided with a second oil outlet, and the second oil outlet is communicated with the main passage and the through hole.

7. The engine of claim 6, wherein a seal is provided between the third shaft section and the first end cap.

8. The engine of claim 6, wherein a surface of the oil pump for penetrating the shaft hole of the first shaft section is provided with a slot, and the slot is communicated with the oil chamber.

9. The engine of claim 6, further comprising a crankshaft, wherein the sealed chamber is located below the crankshaft, the crankshaft and the drive shaft being connected by a chain drive assembly.

10. An engine according to any one of claims 6 to 9, wherein the drive shaft is a rigid shaft.

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