Engine

Abstract

The engine comprises a crankcase, a cylinder body and a cylinder cover, the crankcase comprises a mounting base, the mounting base comprises a mounting hole and mounting base ventilation openings located in the left side and the right side of the mounting hole in the radial direction, mounting base air channels are formed in the left side and the right side of the mounting base, and the mounting base ventilation openings communicate with the mounting base air channels below the mounting base ventilation openings; the cylinder body is fixed on the mounting seat and comprises a fixed surface matched with the mounting seat, a cylinder body ventilation opening matched with the mounting seat ventilation opening is formed in the fixed surface, cylinder body air channels are formed in the left side and the right side of the cylinder body, the cylinder body ventilation opening is communicated with the cylinder body air channel above the cylinder body ventilation opening, and the cylinder body ventilation opening and the mounting seat ventilation opening form a ventilation channel; the ventilation duct communicates with the cylinder body air duct and the installation base air duct. The mounting base ventilation opening and the cylinder body ventilation opening are formed in the top end face of the crankcase and the fixing face of the cylinder body correspondingly, the ventilation channel communicating the mounting base air channel and the cylinder body air channel is formed, and the heat dissipation area of the cylinder body and the crankcase is further increased under the condition that the strength is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to an air-cooled engine. Background Art

[0002] In the existing technology, in recent years, with the development of automobile industry and engine technology, my country's engine industry has also made great progress. Small air-cooled engines have the characteristics of high speed, strong explosion pressure, forced heat dissipation by air cooling, etc. Many of the existing air-cooled engines adopt a cylinder block and crankcase separation structure, in which the cylinder block process is die-cast aluminum. Heat dissipation has always been a difficult point to overcome in the development of air-cooled engine projects. At the same time, the upper and lower parting surfaces of the crankcase and cylinder block of the air-cooled split diesel engine are thickened as a whole to ensure strength, which increases the weight of the whole machine compared to the integral body and reduces the ventilation area.

[0003] Therefore, it is necessary to provide an engine to overcome the above-mentioned defects. Summary of the invention

[0004] An object of the present invention is to provide an engine.

[0005] According to one aspect of the present invention, there is provided an engine, comprising:

[0006] A crankcase, the crankcase comprising a mounting seat at the top and a crankshaft hole provided on the crankcase wall, the axial direction of the crankshaft hole being the front-to-back direction, the radial horizontal sides of the crankshaft hole being the left-to-right direction, and the side where the case wall is located being the front side;

[0007] The top surface of the crankcase is arranged in a horizontal plane, the mounting seat comprises a mounting hole vertically penetrating the mounting seat and mounting seat vents located on the left and right sides of the mounting hole radially, the left and right sides of the mounting seat are provided with mounting seat air ducts, the mounting seat air ducts are located below the mounting seat vents, and the mounting seat vents are communicated with the mounting seat air ducts below them;

[0008] A cylinder body, the cylinder body is fixed on the mounting seat, the cylinder body includes a fixing surface matched with the mounting seat, the fixing surface is provided with a cylinder body vent matched with the mounting seat vent, the left and right sides of the cylinder body are provided with a cylinder body air duct, the cylinder body air duct is located above the cylinder body vent, the cylinder body vent is connected with the cylinder body air duct above it, the cylinder body vent and the mounting seat vent constitute a ventilation duct, and the ventilation duct connects the cylinder body air duct and the mounting seat air duct;

[0009] A cylinder cover is fixed on the top of the cylinder body.

[0010] Preferably, the mounting seat air duct and the cylinder body air duct are both arranged to be through-connected front to back.

[0011] Preferably, the mounting seat also includes a first support wall located on the left side of the mounting hole and a tappet chamber located on the right side of the mounting hole, heat sinks are provided on the outer wall of the mounting hole, between the mounting hole and the first support wall, and between the mounting hole and the tappet chamber, and the mounting seat air duct is located between the mounting hole and the first support wall and between the mounting hole and the tappet chamber.

[0012] Preferably, the cylinder body includes a cylinder barrel, a second support wall located on the left side of the cylinder barrel, and a push rod chamber located on the right side of the cylinder barrel. Heat sinks are provided on the peripheral outer surface of the cylinder barrel, between the cylinder barrel and the second support wall, and between the cylinder barrel and the push rod chamber. The cylinder body air duct is located between the cylinder barrel and the second support wall and between the cylinder barrel and the push rod chamber.

[0013] Preferably, the mounting seat vent located on the right side is arranged between the mounting hole and the strut chamber and two are spaced apart from each other in the front and rear direction, and the mounting seat vent located on the left side is arranged between the mounting hole and the first support wall and two are spaced apart from each other in the front and rear direction.

[0014] Preferably, the cylinder vent located on the right side is arranged between the cylinder barrel and the push rod chamber and two are spaced apart from each other, and the cylinder vent located on the left side is arranged between the cylinder barrel and the second support wall and two are spaced apart from each other.

[0015] Preferably, a lower fixing bracket is provided on the outer side of the tappet chamber and the outer side of the first supporting wall, and an upper fixing bracket is provided on the outer side of the push rod chamber and the outer side of the second supporting wall. The upper fixing bracket and the lower fixing bracket are arranged in correspondence with each other up and down, and the cylinder block and the crankcase are strengthened and fixed by passing the fixing bolts through the corresponding upper fixing bracket and the lower fixing bracket.

[0016] Preferably, a cylinder body oblique rib is obliquely arranged between the second supporting wall and the cylinder barrel, the cylinder body oblique rib is located between the upper and lower adjacent heat sinks, and extends from the side where the second supporting wall is located to the side where the cylinder barrel is located from bottom to top, and the cylinder body oblique rib is located above the upper fixed bracket.

[0017] Preferably, the heat sink includes a first heat sink whose height is not higher than the upper end surface of the upper fixed bracket and a second heat sink arranged above the first heat sink and adjacent to the first heat sink, the bottom end of the cylinder body oblique rib is connected to the first heat sink and the second support wall at the same time, and the top end of the cylinder body oblique rib is connected to the second heat sink and the cylinder barrel at the same time.

[0018] Preferably, the crankcase further comprises a crankcase side wall connected to the first supporting wall, a plurality of reinforcing ribs are distributed on the crankcase side wall, and the reinforcing ribs are connected to the lower fixing bracket.

[0019] Compared with the prior art, the engine provided by the present invention has the following beneficial effects:

[0020] Due to the adoption of the above technical scheme, the present invention has the advantages of simple structure, ingenious design and low cost. By respectively opening the mounting seat vent and the cylinder vent on the top surface of the crankcase and the fixed surface of the cylinder body, and forming a ventilation duct connecting the mounting seat air duct and the cylinder body air duct, the heat dissipation area at the cylinder body and the crankcase is further increased while ensuring the strength, making the cooling more uniform, thereby reducing the deformation of the outer wall of the cylinder liner and reducing the weight of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0022] Figure 1 A front view of the engine of the present invention;

[0023] Figure 2 for Figure 1 The cross-sectional view of the AA surface;

[0024] Figure 3 for Figure 1 A cross-sectional view of the BB surface;

[0025] Figure 4 is a perspective view of a crankcase of the present invention;

[0026] Figure 5 A top view of a crankcase of the present invention;

[0027] Figure 6 A three-dimensional diagram of a cylinder body of the present invention;

[0028] Figure 7 A bottom view of a cylinder body of the present invention;

[0029] Figure 8 It is a right side view of the engine of the present invention;

[0030] Fig. 9 It is a left side view of the engine of the present invention.

[0031] Among them, 1. crankcase, 11. case wall, 111. crankshaft hole, 12. side wall, 121. reinforcement rib, 13. mounting seat, 131. mounting hole, 132. first support wall, 133. tappet chamber, 134. mounting seat vent, 135. mounting seat air duct, 136. lower fixing bracket, 14. top surface, 2. cylinder block, 21. cylinder barrel, 22. second support wall, 23. push rod chamber, 24. fixing surface, 25. cylinder block vent, 26. cylinder block air duct, 27. upper fixing bracket, 28. cylinder block oblique rib, 3. cylinder head, 4. heat sink, 41. first heat sink, 42. second heat sink, 5. cylinder head bolt, 6. fixing bolt, a. air duct. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0034] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0035] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0038] See also Figure 1 , Figure 8 and Fig. 9The present embodiment discloses an engine, which is an air-cooled engine, comprising a crankcase 1, a cylinder block 2 and a cylinder head 3. The cylinder block 2 is fixed to the top of the crankcase 1, and the cylinder head 3 is fixed to the top of the cylinder block 2. The crankcase 1, the cylinder block 2 and the cylinder head 3 are compressed and fixed by four cylinder head bolts 5. The cylinder head bolts 5 pass through the cylinder head 3 and the cylinder liner 2 and penetrate into the crankcase 1. The bottom of the cylinder head bolts 5 is connected and fixed to the crankcase 1, and the top is locked and fixed by nuts.

[0039] See also Figure 2 , Figure 4 and Figure 5 The crankcase 1 includes a case wall 11 and a side wall 12. The case wall 11 is provided with a crankshaft hole 111. The axial direction of the crankshaft hole 111 is the front-to-back direction, the radial horizontal sides of the crankshaft hole 111 are the left-to-right direction, the radial vertical direction of the crankshaft hole 111 is the up-down direction, the side where the case wall 11 is located is the front side, and the opening side of the crankcase 1 is the rear side. The top end surface 14 of the crankcase 1 is arranged in a horizontal plane.

[0040] The crankcase 1 further includes a mounting seat 13 at the top, and the top surface 14 of the crankcase 1 is the upper surface of the mounting seat 13. The mounting seat 13 includes a mounting hole 131 located in the middle thereof and vertically passing through the mounting seat 13, a first supporting wall 132 located on the left side of the mounting hole 131, and a tappet chamber 133 located on the right side of the mounting hole 131. Heat sinks 4 are provided on the outer wall of the mounting hole 131, between the mounting hole 131 and the first supporting wall 132, and between the mounting hole 131 and the tappet chamber 133. The mounting seat 13 further includes mounting seat vents 134 located on the radial left and right sides of the mounting hole 131. The mounting seat vent 134 located on the right side is provided between the mounting hole 131 and the tappet chamber 133, and two are provided at intervals in front and back, and the mounting seat vent 134 located on the left side is provided between the mounting hole 131 and the first supporting wall 132, and two are provided at intervals in front and back.

[0041] The left and right sides of the mounting seat 13 are provided with mounting seat air ducts 135 that penetrate front and back, and the mounting seat air ducts 135 are located between the mounting hole 131 and the first support wall 132 and between the mounting hole 131 and the tappet chamber 133. The mounting seat air ducts 135 are located below the mounting seat vents 134, and the mounting seat vents 134 are connected to the mounting seat air ducts 135 below. At the same time, the mounting seat air ducts 135 are located between the upper and lower adjacent heat sinks 4.

[0042] See also Figure 3 , Figure 6 and Figure 7The cylinder body 2 includes a cylinder barrel 21, a second support wall 22 located on the left side of the cylinder barrel 21, and a push rod chamber 23 located on the right side of the cylinder barrel 21. A heat sink 4 is provided on the peripheral outer surface of the cylinder barrel 21, between the cylinder barrel 21 and the second support wall, and between the cylinder barrel 21 and the push rod chamber 23. The cylinder body 2 is fixed on the mounting seat 13, and the cylinder body 2 includes a fixing surface 24 matched with the upper surface of the mounting seat 13, and a cylinder body vent 25 matched with the mounting seat vent 134 is provided on the fixing surface 24. The cylinder body vent 25 located on the right side is provided between the cylinder barrel 21 and the push rod chamber 23, and two of them are provided at intervals in front and back, and the cylinder body vent 25 located on the left side is provided between the cylinder barrel 21 and the second support wall 22, and two of them are provided at intervals in front and back.

[0043] The cylinder body 2 has cylinder body air ducts 26 that penetrate from front to back on the left and right sides. The cylinder body air ducts 26 are located between the cylinder barrel 21 and the second support wall 22 and between the cylinder barrel 21 and the push rod chamber 23. The cylinder body air ducts 26 are located above the cylinder body vents 25, and the cylinder body vents 25 are connected to the cylinder body air ducts 26 above them. At the same time, the cylinder body air ducts 26 are located between the upper and lower adjacent heat sinks 4 on the cylinder body 2.

[0044] The cylinder vent 25 and the mounting seat vent 134 form a ventilation duct a, which connects the cylinder duct 26 and the mounting seat duct 135. The cooling air enters the mounting seat duct 135 and the cylinder duct 26 from the side where the box wall 11 is located, and is discharged from the opening side of the crankcase 1. The upper and lower adjacent ducts can be connected through the ventilation duct a, which further increases the heat dissipation area and reduces the weight of the whole machine. When the flow velocity in the mounting seat duct 135 and the cylinder duct 26 forms a pressure difference, the side with a larger flow velocity will supply air to the other side through the ventilation duct a, thereby achieving a flow velocity balance and achieving the best heat dissipation effect.

[0045] See also Figure 8 and Fig. 9 The outer side of the tappet chamber 133 and the outer side of the first support wall 132 are both provided with lower fixing brackets 136, and the outer side of the push rod chamber 23 and the outer side of the second support wall 22 are both provided with upper fixing brackets 27. The upper fixing brackets 27 and the lower fixing brackets 136 are arranged in correspondence with each other, and the fixing bolts 6 pass through the corresponding upper fixing brackets 27 and the lower fixing brackets 136 to strengthen and fix the cylinder block 2 and the crankcase 1.

[0046] See also Figure 6 A cylinder body oblique rib 28 is obliquely arranged between the second supporting wall 22 and the cylinder barrel 21. The cylinder body oblique rib 28 is located between the upper and lower adjacent heat sinks 4 on the cylinder body 2, and extends from the side where the second supporting wall 22 is located to the side where the cylinder barrel 21 is located from bottom to top. The cylinder body oblique rib 28 is located above the upper fixed bracket 27. The cylinder body oblique rib 28 plays a supporting role and a heat dissipation role for the cylinder body 2.

[0047] The heat sink 4 includes a first heat sink 41 whose height is not higher than the upper end surface of the upper fixed bracket 27 and a second heat sink 42 disposed above and adjacent to the first heat sink 41. The bottom end of the cylinder oblique rib 28 is connected to the first heat sink 41 and the second support wall 22 at the same time, and the top end of the cylinder oblique rib 28 is connected to the second heat sink 42 and the cylinder barrel 21 at the same time.

[0048] A plurality of reinforcing ribs 121 are distributed on the side wall 12 of the crankcase 1, and the reinforcing ribs 121 are connected to the lower fixing bracket 136. The reinforcing ribs 121 can transmit force while strengthening the overall strength of the crankcase 1. The side wall 12 of the crankcase 1 on the left is connected to the first supporting wall 132, and the explosive pulling force of the cylinder body 2 can be transmitted to the crankcase 1 through the cylinder body oblique ribs 28, the upper fixing bracket 27, the lower fixing bracket 136 and the reinforcing ribs 121 for dispersion, making the whole machine operation safer and more reliable.

[0049] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.

Claims

1. An engine, characterized in that: include: A crankcase, the crankcase comprising a mounting seat at the top and a crankshaft hole provided on the crankcase wall, the axial direction of the crankshaft hole being the front-to-back direction, the radial horizontal sides of the crankshaft hole being the left-to-right direction, and the side where the case wall is located being the front side; The top surface of the crankcase is arranged in a horizontal plane, the mounting seat comprises a mounting hole vertically penetrating the mounting seat and mounting seat vents located on the left and right sides of the mounting hole radially, the left and right sides of the mounting seat are provided with mounting seat air ducts, the mounting seat air ducts are located below the mounting seat vents, and the mounting seat vents are communicated with the mounting seat air ducts below them; A cylinder body, the cylinder body is fixed on the mounting seat, the cylinder body includes a fixing surface matched with the mounting seat, the fixing surface is provided with a cylinder body vent matched with the mounting seat vent, the left and right sides of the cylinder body are provided with a cylinder body air duct, the cylinder body air duct is located above the cylinder body vent, the cylinder body vent is connected with the cylinder body air duct above it, the cylinder body vent and the mounting seat vent constitute a ventilation duct, and the ventilation duct connects the cylinder body air duct and the mounting seat air duct; A cylinder cover is fixed on the top of the cylinder body.

2. The engine according to claim 1, characterized in that The mounting seat air duct and the cylinder body air duct are both arranged to be connected front to back.

3. The engine according to claim 2, characterized in that The mounting seat also includes a first supporting wall located on the left side of the mounting hole and a tappet chamber located on the right side of the mounting hole. Heat sinks are provided on the outer wall of the mounting hole, between the mounting hole and the first supporting wall, and between the mounting hole and the tappet chamber. The mounting seat air duct is located between the mounting hole and the first supporting wall and between the mounting hole and the tappet chamber.

4. The engine according to claim 3, characterized in that The cylinder body includes a cylinder barrel, a second supporting wall located on the left side of the cylinder barrel, and a push rod chamber located on the right side of the cylinder barrel. Heat sinks are provided on the peripheral outer surface of the cylinder barrel, between the cylinder barrel and the second supporting wall, and between the cylinder barrel and the push rod chamber. The cylinder body air duct is located between the cylinder barrel and the second supporting wall and between the cylinder barrel and the push rod chamber.

5. The engine according to claim 4, characterized in that The mounting seat vent located on the right side is arranged between the mounting hole and the tappet chamber, and two of them are spaced apart from each other in the front and back. The mounting seat vent located on the left side is arranged between the mounting hole and the first supporting wall, and two of them are spaced apart from each other in the front and back.

6. The engine according to claim 5, characterized in that The cylinder vent located on the right side is arranged between the cylinder barrel and the push rod chamber, and two of them are spaced apart from each other. The cylinder vent located on the left side is arranged between the cylinder barrel and the second supporting wall, and two of them are spaced apart from each other from each other.

7. The engine according to claim 6, characterized in that The outer side of the tappet chamber and the outer side of the first support wall are both provided with lower fixing brackets, and the outer side of the push rod chamber and the outer side of the second support wall are both provided with upper fixing brackets. The upper fixing brackets and the lower fixing brackets are arranged in correspondence with each other up and down, and the cylinder block and the crankcase are strengthened and fixed by passing the corresponding upper fixing brackets and the lower fixing brackets through fixing bolts.

8. The engine according to claim 7, characterized in that A cylinder body oblique rib is obliquely arranged between the second supporting wall and the cylinder barrel. The cylinder body oblique rib is located between upper and lower adjacent heat sinks and extends from the side where the second supporting wall is located to the side where the cylinder barrel is located from bottom to top. The cylinder body oblique rib is located above the upper fixed bracket.

9. The engine according to claim 8, characterized in that The heat sink includes a first heat sink whose height is not higher than the upper end surface of the upper fixed bracket and a second heat sink arranged above the first heat sink and adjacent to the first heat sink. The bottom end of the cylinder oblique rib is connected to the first heat sink and the second support wall at the same time, and the top end of the cylinder oblique rib is connected to the second heat sink and the cylinder barrel at the same time.

10. The engine according to claim 9, characterized in that The crankcase further comprises a crankcase side wall connected to the first supporting wall, a plurality of reinforcing ribs are distributed on the crankcase side wall, and the reinforcing ribs are connected to the lower fixing bracket.

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