Crankcase of gasoline engine

Abstract

The valve rocker arm shaft comprises an outer shell, a shell cover and a crankshaft assembly, the upper end of the outer shell is covered with the shell cover, an installation interval is arranged at the connecting position of the outer shell and the shell cover, and the crankshaft assembly is installed in the installation interval; a fixing hole is formed in the lower side of the shell, and a valve rocker arm shaft is arranged in the fixing hole; the crankshaft assembly comprises a crankshaft rod, a first oil throwing piece is arranged on the crankshaft rod, and an oil guide plate is arranged on one side of the first oil throwing piece. By arranging the oil guide plate, engine oil can be accelerated to enter the crankshaft assembly, the effect of lubricating the crankshaft assembly faster is achieved in the process, and the service life of the valve rocker arm shaft of the gasoline engine crankcase and the gasoline engine crankcase comprising the valve rocker arm shaft is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gasoline engine crankcase, in particular to a valve rocker shaft for gasoline engine crankcase and gasoline engine crankcase. BACKGROUND

[0002] The gasoline engine is a kind of power machinery using gasoline as fuel, which is composed of cylinder, crank connecting rod mechanism, gas distribution system, oil supply system, lubricating system and ignition system etc.Parts.The general gasoline engine crankcase refers to reciprocating piston type gasoline engine crankcase with wide application except for vehicle and aviation, generally with power within 20kW, and most of them are very strong in general purpose, and some are strong in professional purpose, so they are also generally called small gasoline engine crankcase.The general gasoline engine crankcase is characterized by simple structure, easy operation and low cost, and is mainly used in agricultural and forestry plant protection machinery, garden machinery, small machines, generator sets, construction machinery, fire-fighting series machines, recreational go-karts, water power and aviation model power etc.The crankcase is one of the main components of the gasoline engine, which is internally provided with moving parts such as crankshaft and connecting rod, and the crankcase cover and the crankcase body together form the crankcase, the crankcase cover is cast according to the contour shape of the crankcase body and then processed, and the shape is like a disc.

[0003] The valve rocker shaft is arranged on the outer shell of the gasoline engine crankcase, and the valve rocker shaft cannot store the oil dirt generated at high temperature, so that the service life of the valve rocker shaft is shortened;the gasoline engine crankcase is only provided with two oil throwing sheets, the speed of oil entering the connecting rod is slow, and the speed of lubricating the piston and the needle roller is slow, so that the service life of the gasoline engine crankcase is shortened. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem to be solved

[0005] The utility model wants to solve the problem to provide a valve rocker shaft for gasoline engine crankcase and gasoline engine crankcase, which can store oil dirt and oil, so as to prolong the service life of the valve rocker shaft.

[0006] (II) Technical scheme

[0007] In order to solve the technical problem, the utility model provides a gasoline engine crankcase, which comprises a shell and a crankshaft assembly, the shell is provided with an installation interval, the crankshaft assembly is installed in the installation interval, and an oil passage is formed in the crankshaft assembly;

[0008] The crankshaft assembly comprises a crankshaft rod, a through hole is formed in the crankshaft rod and connected with the oil passage, a first oil throwing sheet is arranged on the crankshaft rod, a guide plate is arranged on one side of the first oil throwing sheet, the guide plate extends along the radial direction of the crankshaft rod, and the guide plate is located on the lower side of the through hole to facilitate the introduction of oil into the through hole.

[0009] The lower side of the shell is provided with a fixing hole, and the valve rocker shaft is arranged in the fixing hole; the valve rocker shaft comprises a valve rocker shaft body, and a guide groove is arranged on the outer peripheral wall of the valve rocker shaft body; the guide groove is helically arranged on the outer peripheral wall of the valve rocker shaft body, and the groove depth of the guide groove is 1mm and the width is 1.5mm; one end of the valve rocker shaft body is provided with a valve rocker threaded connection part, and the other end of the valve rocker shaft body is provided with a cam rocker threaded connection part.

[0010] In the scheme, by arranging the oil guide plate, the oil can enter the crankshaft assembly faster, so that the crankshaft assembly is lubricated faster, and the service life of the valve rocker shaft of the gasoline engine crankcase and the gasoline engine crankcase comprising the same is prolonged.

[0011] As a further optimization, the crankshaft assembly further comprises a second oil throwing piece, which is arranged on one side of the first oil throwing piece, and the second oil throwing piece is arranged on the crankshaft rod.

[0012] As a further optimization, the first oil throwing piece and the second oil throwing piece both extend along the radial direction of the crankshaft rod, the extension direction of the first oil throwing piece is consistent with that of the oil guide plate, and the extension direction of the first oil throwing piece is opposite to that of the second oil throwing piece.

[0013] As a further optimization, the shell comprises an outer shell and a shell cover, the shell cover is detachably arranged on the upper end of the outer shell, and the shell cover and the outer shell are buckled to form the mounting space.

[0014] As a further optimization, the crankshaft assembly further comprises a crank, a needle roller, a first pin and a second pin, the needle roller is connected with the first pin and the second pin on both sides, the first pin is connected with the crankshaft rod, and the second pin is connected with the crank on the side away from the needle roller.

[0015] As a further optimization, the first bearing and the second bearing are respectively arranged on the crankshaft rod and the crank, the first bearing is arranged on the side of the first pin close to the second oil throwing piece, and the second bearing is arranged on the side of the second pin away from the first pin.

[0016] As a further optimization, the connecting rod is integrally arranged on the needle roller.

[0017] (Three) beneficial effects

[0018] The gasoline engine crankcase valve rocker shaft and the gasoline engine crankcase comprising the same have the following beneficial effects:

[0019] (1) by setting the guide groove on the valve rocker arm shaft, the guide groove can store oil dirt and oil, thereby prolonging the service life of the valve rocker arm shaft;

[0020] (2) by setting the oil guide plate, the oil can enter the crankshaft assembly faster, which plays a faster lubricating role for the crankshaft assembly, prolonging the service life of the valve rocker arm shaft of the gasoline engine crankcase and the gasoline engine crankcase containing the same. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 is a structural diagram of a gasoline engine crankcase of the present application;

[0023] Figure 2 is a structural diagram of the present application after the gasoline engine crankcase is hidden behind the shell cover;

[0024] Figure 3 is a first structural diagram of the shell of the gasoline engine crankcase of the present application;

[0025] Figure 4 is a second structural diagram of the shell of the gasoline engine crankcase of the present application;

[0026] Figure 5 is a structural diagram of the crankshaft assembly of the gasoline engine crankcase of the present application;

[0027] Figure 6 is a structural diagram of the valve rocker arm shaft of the gasoline engine crankcase of the present application.

[0028] The corresponding component names of the various reference signs in the drawings are: 1, shell; 11, installation interval; 12, fixing hole; 2, shell cover; 3, crankshaft assembly; 31, crankshaft rod; 311, through hole; 312, first oil throwing piece; 313, oil guide plate; 314, second oil throwing piece; 315, first pin; 316, first bearing; 32, crank; 321, second pin; 322, second bearing; 33, needle roller; 34, connecting rod; 4, valve rocker arm shaft; 41, valve rocker arm shaft body; 42, guide groove; 43, valve rocker arm threaded connection part; 44, cam rocker arm threaded connection part. DETAILED DESCRIPTION

[0029] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0030] The present application is illustrated by way of example and not limitation in the figures of the accompanying drawings in which like references indicate similar elements, and in which:

[0031] To illustrate, various aspects of embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be implemented in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art will appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect described herein can be implemented both as any number of software and / or hardware structures.

[0032] It is also noted that the representative hardware and / or software illustrated in the figures can be operated by one or more applications. Furthermore, any required software can be supplied using executable objects, software packages, code generation processes, and the like.

[0033] Furthermore, in the following description, numerous specific details are provided, such as specific components, to provide a thorough understanding of the present example. However, one skilled in the relevant art will recognize that the example can be practiced without these specific details. In some instances, well-known structures and functions have not been described in exhaustive detail so as not to obscure the example.

[0034] The technical solutions provided by the embodiments of the present application are described below in combination with the drawings. Embodiment 1:

[0035] Reference is made to Figure 6A valve rocker shaft 4 for a gasoline engine crankcase, comprising a valve rocker shaft body 41, a guide groove 42 is arranged on the outer peripheral wall of the valve rocker shaft body 41. The guide groove 42 is helically arranged on the outer peripheral wall of the valve rocker shaft body 41, and the groove depth of the guide groove 42 is 1mm and the width is 1.5mm. One end of the valve rocker shaft body 41 is provided with a valve rocker threaded connection part 43, and the other end of the valve rocker shaft body 41 is provided with a cam rocker threaded connection part 44.

[0036] Specifically, in this embodiment, the valve rocker shaft body 41 is provided with a valve rocker threaded connection part 43 on each side for connecting a valve rocker and a cam rocker threaded connection part 44 for connecting a cam rocker; and the valve rocker threaded connection part 43 and the cam rocker threaded connection part 44 are integrally arranged with the valve rocker shaft body 41, and a guide groove 42 is helically arranged on the outer peripheral wall of the valve rocker shaft body 41 for guiding oil and storing oil and oil dirt, and the depth of the guide groove 42 is 1mm and the width is 1.5mm. By arranging the guide groove 42 on the valve rocker shaft 4, the oil dirt and oil can be stored in the guide groove 42, thereby prolonging the service life of the valve rocker shaft 4. Embodiment 2:

[0037] Reference Figures 1 to 6 ,

[0038] 1. A gasoline engine crankcase, comprising a housing and a crankshaft assembly 3, the housing is provided with a mounting interval 11, the crankshaft assembly 3 is mounted in the mounting interval 11, and an oil passage is formed in the crankshaft assembly 3;

[0039] The crankshaft assembly 3 comprises a crankshaft rod 31, a through hole 311 is formed in the crankshaft rod 31 and communicates with the oil passage, a first oil throwing piece 312 is arranged on the crankshaft rod 31, one side of the first oil throwing piece 312 is provided with an oil guide plate 313, the oil guide plate 313 extends along the radial direction of the crankshaft rod 31, and the oil guide plate 313 is located on the lower side of the through hole 311 to facilitate guiding oil into the through hole 311;

[0040] The lower side of the housing is provided with a fixing hole 12, and the valve rocker shaft 4 is arranged in the fixing hole 12; the valve rocker shaft 4 is the valve rocker shaft 4 for a gasoline engine crankcase as described in embodiment 1.

[0041] Further, as a preferred embodiment, the crankshaft assembly 3 further comprises a second oil throwing piece 314, which is arranged on one side of the first oil throwing piece 312 and is arranged on the crankshaft rod 31.

[0042] Further, as a preferred implementation, the first oil throwing piece 312 and the second oil throwing piece 314 both extend along the radial direction of the crankshaft rod 31, the first oil throwing piece 312 extends in the same direction as the oil guide plate 313, and the first oil throwing piece 312 extends in the opposite direction of the second oil throwing piece 314.

[0043] Further, as a preferred implementation, the shell includes an outer shell 1 and a shell cover 2, the shell cover 2 is detachably arranged on the upper end of the outer shell 1, and the shell cover 2 and the outer shell 1 are buckled to form the mounting space.

[0044] Further, as a preferred implementation, the crankshaft assembly 3 further includes a crank 32, a needle roller 33, a first pin 315, and a second pin 321, the first pin 315 and the second pin 321 are respectively connected to the two sides of the needle roller 33, the first pin 315 is connected to the crankshaft rod 31, and the second pin 321 is connected to the crank 32 away from the needle roller 33.

[0045] Further, as a preferred implementation, the first bearing 316 and the second bearing 322 are respectively arranged on the crankshaft rod 31 and the crank 32, the first bearing 316 is arranged on the side of the first pin 315 close to the second oil throwing piece 314, and the second bearing 322 is arranged on the side of the second pin 321 away from the first pin 315. The connecting rod 34 is integrally arranged on the needle roller 33.

[0046] Specifically, in the present embodiment, the shell includes an outer shell 1 and a shell cover 2, an opening is arranged on the upper side of the outer shell 1, the opening is sealed by the shell cover 2 arranged at the opening position, the outer shell 1 and the shell cover 2 are buckled to each other and detachably connected by bolts, the shell cover 2 is provided with a first mounting hole, the outer shell 1 is provided with a second mounting hole, and the first mounting hole and the second mounting hole are arranged opposite to each other to form a mounting space after installation, the mounting space is used to mount the crankshaft assembly 3, the outer shell 1 is provided with two clamping grooves, and a resting groove is arranged on the outer shell 1 between the two clamping grooves; the outer shell 1 is provided with a storage groove for storing oil, and the storage groove is arranged on the front side of the resting groove; the crankshaft assembly 3 drives the piston to cooperate between the cylinder and the valve to realize the combustion of gasoline in the cylinder; the lower side of the outer shell 1 is provided with a fixing hole 12 on each side, and a valve rocker arm shaft 4 is arranged in each fixing hole 12.

[0047] Specifically, in the embodiment, the crankshaft assembly 3 is internally provided with an oil passage for supplying oil to other devices, and the crankshaft assembly 3 is composed of a crankshaft rod 31, a crank 32, a needle roller 33, a connecting rod 34, a first pin 315, a second pin 321, a first bearing 316, a second bearing 322, a first oil throwing piece 312 and a second oil throwing piece 314. The first pin 315 and the second pin 321 are respectively arranged on the side close to each other of the crankshaft rod 31 and the crank 32, and the first pin 315 and the second pin 321 are connected by a connecting shaft. The connecting shaft is sleeved with the needle roller 33, and the connecting rod 34 is integrally arranged below the needle roller 33, so that the needle roller 33 is arranged between the crankshaft rod 31 and the crank. The first pin 315, the second pin 321, the needle roller 33 and the connecting rod 34 are arranged in the resting groove, and the lower end of the connecting rod 34 is connected with a piston. The crank 32 is sleeved with the first oil throwing piece 312 and the second oil throwing piece 314, and the second oil throwing piece 314 is arranged on the side close to the first oil throwing piece 312 of the crank 32. The side close to the second oil throwing piece 314 of the first oil throwing piece 312 is provided with an oil guide plate 313. A through hole 311 is formed in the crankshaft rod 31, and the through hole 311 is connected with the oil passage to send oil into the oil passage. The oil guide plate 313, the first oil throwing piece 312 and the second oil throwing piece 314 all extend along the radial direction of the crankshaft rod 31. The through hole 311 and the oil guide plate 313 are arranged between the first oil throwing piece 312 and the second oil throwing piece 314, and the oil guide plate 313 is located on the lower side of the through hole 311 to facilitate guiding oil into the through hole 311. The first oil throwing piece 312 and the second oil throwing piece 314 stir the oil in the storage groove and throw the oil into the through hole 311, but the size of the through hole 311 is limited, so the amount of oil thrown in is limited. The extension direction of the first oil throwing piece 312 is consistent with that of the oil guide plate 313, and the extension direction of the first oil throwing piece 312 is opposite to that of the second oil throwing piece 314. A roller is further arranged between the first oil throwing piece 312 and the second oil throwing piece 314. The side away from each other of the crankshaft rod 31 and the crank 32 is provided with a threaded connection part for connecting other devices. The crankshaft rod 31 and the crank 32 are respectively sleeved with the first bearing 316 and the second bearing 322, and the first bearing 316 and the second bearing 322 are clamped in the clamping groove of the shell 1.

[0048] Specifically, in the embodiment, by arranging the oil guide plate 313, the oil can be accelerated to enter the crankshaft assembly 3, which plays a role of faster lubrication of the crankshaft assembly 3, and prolongs the service life of the valve rocker shaft 4 of the gasoline engine crankcase and the gasoline engine crankcase containing the valve rocker shaft 4. By arranging the through hole 311, the oil can be more conveniently introduced into the crankshaft assembly 3.

[0049] In the specification, the same or similar parts among various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0050] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by the person skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gasoline engine crankcase characterized by: The application relates to a crankshaft assembly, which comprises a shell and a crankshaft assembly (3), wherein an installation area (11) is arranged on the shell, the crankshaft assembly (3) is installed in the installation area (11), and an oil channel is arranged in the crankshaft assembly (3). The crankshaft assembly (3) comprises a crankshaft rod (31), a through hole (311) is arranged in the crankshaft rod (31) and communicates with the oil channel, a first oil throwing piece (312) is arranged on the crankshaft rod (31), a guide plate (313) is arranged on one side of the first oil throwing piece (312), the guide plate (313) extends along the radial direction of the crankshaft rod (31), and the guide plate (313) is arranged on the lower side of the through hole (311) so as to facilitate the guiding of oil into the through hole (311). A fixing hole (12) is arranged on the lower side of the shell, a valve rocker shaft (4) is arranged in the fixing hole (12), the valve rocker shaft (4) comprises a valve rocker shaft body (41), a guide groove (42) is arranged on the outer peripheral wall of the valve rocker shaft body (41), the guide groove (42) is helically arranged on the outer peripheral wall of the valve rocker shaft body (41), the groove depth of the guide groove (42) is 1 mm, and the width of the guide groove (42) is 1.5 mm, a valve rocker threaded connection part (43) is arranged on one end of the valve rocker shaft body (41), and a cam rocker threaded connection part (44) is arranged on the other end of the valve rocker shaft body (41).

2. The gasoline engine crankcase according to claim 1, characterized by: The crankshaft assembly (3) further comprises a second oil throwing piece (314), the second oil throwing piece (314) is arranged on one side of the first oil throwing piece (312), and the second oil throwing piece (314) is arranged on the crankshaft rod (31).

3. The gasoline engine crankcase according to claim 2, characterized in that: The first oil throwing piece (312) and the second oil throwing piece (314) both extend along the radial direction of the crankshaft rod (31), the extending direction of the first oil throwing piece (312) is consistent with that of the guide plate (313), and the extending direction of the first oil throwing piece (312) is opposite to that of the second oil throwing piece (314).

4. The gasoline engine crankcase according to claim 3, characterized in that: The shell comprises an outer shell (1) and a shell cover (2), the shell cover (2) is detachably arranged on the upper end of the outer shell (1), and the shell cover (2) and the outer shell (1) are buckled to form an installation space.

5. The gasoline engine crankcase according to claim 4, characterized in that: The crankshaft assembly (3) further comprises a crank (32), a needle roller (33), a first pin (315) and a second pin (321), the needle roller (33) is connected with the first pin (315) and the second pin (321) on two sides, the first pin (315) is connected with the crankshaft rod (31), and the second pin (321) is connected with the crank (32) on the side away from the needle roller (33).

6. The gasoline engine crankcase according to claim 5, characterized in that: First bearings (316) and second bearings (322) are respectively arranged on the crankshaft rod (31) and the crank (32), the first bearing (316) is arranged on the side of the first pin (315) close to the second oil throwing piece (314), and the second bearing (322) is arranged on the side of the second pin (321) away from the first pin (315).

7. The gasoline engine crankcase according to claim 6, characterized in that: An integral connecting rod (34) is provided on the needle roller (33).

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