JP2013104422A - Reciprocating engine using assembling type center planetarium gear double eccentric disk two cylinder one crank pin type hypocycloid planetarium gear mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance manufacturability, maintenanceability, inspectability, maintainability of a reciprocating engine using an assembling type center planetarium gear double eccentric disk two cylinder one crank pin type hypocycloid planetarium gear mechanism.SOLUTION: An assembling type center planetarium gear double eccentric disk is used which facilitates manufacture, is manufactured by being divided into several components and is constituted by assembling the same so as to provide high accuracy and functions in assembling, instead of a center planetarium gear double eccentric disk two cylinder one crank pin type hypocycloid planetarium gear mechanism.

Description

The present invention is a two-cylinder one-crankpin type hypocycloid planetary gear using an assembling-type central planetary gear double eccentric disk for the purpose of enhancing the practicality of a reciprocating engine using a hypocycloid planetary gear mechanism that creates a linear motion. It is a reciprocating engine with a transmission mechanism as its mechanism, and improves its manufacturability, maintenance, inspection and maintenance.
For the sake of simplicity, a reciprocating engine using a central planetary gear double eccentric disk 2-cylinder 1-crankpin type hypocycloidal planetary gear mechanism that creates linear motion will be referred to as a 2n-cylinder cycloid engine. The cycloid mechanism is used. N is a natural number.

So far, Patent Document 1 has proposed a 2n cylinder cycloid engine and a reciprocating pump device (including a compressor).
FIG. 1 shows, as an example of a 2n-cylinder cycloid engine, an assembly-type four-cylinder cycloid engine having a two-stroke, cylinder arrangement angle γ = 90 using an assembly-type central planetary gear double eccentric disk instead of the central planetary gear double eccentric disk 9. Is shown. For the sake of simplicity, the cylinder head 3, the cylinder 2 and the piston ring 5 are shown only in the cylinder 1, and the crankcase is shown only in the support portion of the crank web bearing in FIG.
Since the assembled central planetary gear double eccentric disc has the same shape and function as the central planetary gear double eccentric disc, FIG. 1 is applied mutatis mutandis as an explanatory diagram of the 2n cylinder cycloid engine which is the background art.
The structure, motion and balancing of the 2n cylinder cycloid mechanism will be described with reference to FIG.
A stationary internal gear 10 having a reference pitch circle diameter 4e fixed to the crankcase 1 and a planetary gear 9b having a reference pitch circle diameter 2e rotatably supported by a crankpin bearing 7 on a crank pin of a crank web 6b with a crank pin are engaged. The planetary gear 9b rotates around the crankpin axis O2 at an angular velocity ω and revolves around the crankshaft axis O1 in an opposite direction at an angular velocity ω. At this time, the axis O3 of the eccentric disk 9a on the reference pitch cylindrical surface of the planetary gear 9b performs a linear reciprocating motion of the stroke 4e on the cylinder center line C. The linear reciprocating motion is the motion of the piston 4 guided by the cylinder 2 while being rotatably supported on the eccentric disc 9 a via the eccentric disc bearing 11. As described above, the linear reciprocating motion of the piston 4 is the two constant-speed rotational motions opposite to each other, that is, the eccentric disk 9a having the eccentric amount e rotates around the crankpin axis O2 and at the same time the crank with the crank radius e. It is created by revolving around the crankshaft axis O1 in the opposite direction at the same angular velocity by the rotation of the shaft 6. Therefore, the 2n-cylinder cycloid mechanism can perfectly balance the force and moment due to inertia, as in the case of a rotating body that rotates and revolves at a constant speed. (See Patent Document 1 and Non-Patent Documents 1 to 3)

In comparison with the piston crank mechanism, the basic features of the hypocycloid planetary gear mechanism that creates linear motion can be summarized as follows.
The linear reciprocating motion of the piston is created by a planetary gear mechanism that is a constant speed motion mechanism in which the gear ratio between the stationary internal gear 10 and the planetary gear 9b is 2: 1. It is created by a link mechanism that is a fast motion mechanism. Therefore, in the 2n cylinder cycloid mechanism, it is possible to remove cylinder side pressure (piston side pressure) and inertia imbalance that are unavoidable by the piston crank mechanism.
Based on this feature, combustion based on cylinder and crankcase rigidity, friction loss, piston slap, vibration and combustion gas leakage reduction, low piston speed near top and bottom dead center, appropriate long stroke and optimization of combustion chamber shape, etc. The feasibility of the 2n-cylinder cycloid engine can be highly evaluated, such as the improvement of the state and the expectation of higher torque and lower speed due to higher pressure and longer stroke. In addition, by utilizing the fact that the crank radius is as small as 1/4 of the piston stroke, as shown in FIG. 1, the crank web bearings 8 and 13 are adopted to reduce the weight and size of the mechanism and improve the rigidity. be able to.
So far, a 2n cylinder cycloid engine has been proposed, but the manufacturability of the central planetary gear double eccentric disc and the crankshaft system remains a problem. (See Patent Document 1)

  JP2011-17329

  Takashi Matsuda, Motoaki Sato: Research on cycloid planetary gear mechanism (1st report), Automobile Engineering Society Proceedings, Vol. 39, no. 2, p. 311-316 (2008).   Takashi Matsuda, Motoaki Sato: Research on cycloid planetary gear mechanism (2nd report), Automobile Engineering Society Proceedings, Vol. 41, no. 1, p109-114 (2010).   Takashi Matsuda, Motoaki Sato: Research on cycloid planetary gear mechanism (3rd report), Automotive Engineering Society 2010 Spring Conference Academic Lecture Pacifico Yokohama May 21, 2010, Literature No. 20105048, Academic Lecture Preprints No. 88-09.

The purpose is to improve the manufacturability and maintenance / inspection / maintenance of the central planetary gear double eccentric disc and crankshaft system in the 2n cylinder cycloid engine (see Patent Document 1 and Non-Patent Document 3).
The present invention solves this problem and increases the practicality of a high-pressure, low-speed, long-stroke and multi-cylinder high-quality reciprocating engine.

In the present invention, in order to improve the manufacturability and maintenance / maintenance / maintenance of the central planetary gear double eccentric disc and the crankshaft system, the assembly type central planetary gear double eccentric disc shown in FIG. It is devised as follows.
As shown in FIG. 2, the central planetary gear double eccentric disc 9 has a central planetary gear 9b (hereinafter referred to as a central planetary gear with mating teeth) provided with mating teeth obtained by extending the teeth of the planetary gear in the axial direction at both ends of the planetary gear. It is divided into three parts: an eccentric board 9a with a fitting tooth groove (hereinafter referred to as a gear wheel) and a fitting tooth groove with which it fits. These are assembled to give the same shape and function as the central planetary gear double eccentric disc 9, and this is called an assembled central planetary gear double eccentric disc. The mating tooth is a low tooth with the tooth tip dropped, and the mating tooth groove is adapted to this mating tooth.
In FIG. 2, as an example of a 2n cylinder cycloid engine, an assembly type four cylinder cycloid engine with two strokes and cylinder arrangement angle γ = 90 is taken as an example, and an assembly type central planetary gear double eccentric disk corresponding to cylinders 1 and 2 is illustrated. doing. This means can be similarly applied to all cylinders of the assembly type 2n cylinder cycloid engine. Since this is self-explanatory, I will omit this reference later.

As shown in Fig. 3, the assembly type central planetary gear double eccentric disk of the previous section is basically divided into a plane S including the axis of the planetary gear and an upper part including the eccentric disk center and a lower part not including the eccentric disk center. Of the split-type center planetary gear double eccentric disc manufactured by manufacturing the split-type center gears 9a ^U and 9a ^L with split-type fitting tooth grooves and the central planetary gears 9b ^α and 9b ^β with split-type fitting teeth. An eccentric disk 9a ^U and 9a ^L with a fitting tooth groove are integrally connected with a screw 12 to devise a method of giving the same shape and function as the central planetary gear double eccentric disk 9, and instead of the central planetary gear double eccentric disk 9 Use. This is called an assembly-type split central planetary gear double eccentric disc.

As shown in FIG. 4, the assembled central planetary gear double eccentric disk of item [0007] is basically divided into a plane S including its axis and an upper part including the eccentric disk center and a lower part not including the eccentric disk center. The fitted eccentric grooves 9a ^U and 9a ^L are assembled to the fitted planetary central planetary gear 9b, respectively, and then the eccentric disks 9a ^U and 9a ^L are joined together with screws. An assembly-type halved central planetary gear double eccentric disc that gives the same shape and function as the central planetary gear double eccentric disc 9 is devised and used instead of the central planetary gear double eccentric disc 9.
The fitting teeth and the fitting tooth grooves have a small number of teeth so that the divided eccentric discs 9a ^U and 9a ^L can be assembled to the central planetary gear 9b by moving in the radial direction.

  According to the assembly type central planetary gear double eccentric disk according to claim 1, it becomes easy to manufacture the central planetary gear double eccentric disk 9 of the 2n cylinder cycloid mechanism, and the relative angular positions of these can be manufactured with high accuracy, and the unity Therefore, practicality is improved.

  According to the assembly type split central planetary gear double eccentric disk according to claim 2, the use of an integral crankshaft instead of the assembly crankshaft 6, the ease of assembly, the maintenance and inspection of the crankpin bearing 7 and the central planetary gear, Maintenance and replacement are possible, which can contribute to the improvement of the practicality of the present invention described in claim 1.

  According to the assembling-type half-type central planetary gear eccentric according to claim 3, the assembly of the crankshaft system is facilitated, and the maintenance and inspection of the central planetary gear is facilitated, and the practicality of the present invention according to claim 1 is improved. Can contribute to.

  According to the first, second, and third aspects of the invention, it is possible to expect a reciprocating pump excellent in smooth motion with a small and light weight, high pressure, low speed, low rigidity structure, low friction loss, and low vibration.

  It is a figure which shows the structure of the assembly type center planetary gear double eccentric disk 2 cylinder 1 crankpin type 4 cylinder cycloid engine of 2 strokes, (gamma) = 90, (a) is a front view from an axial direction (B arrow view), (B) shows a cross section AA.   It is a substantive view of an assembly type central planetary gear double eccentric disc of a two-stroke, γ = 90 assembly type central planetary gear double eccentric disc 2 cylinder 1 crankpin type 4 cylinder cycloid engine.   It is a substantive view of an assembling-type split type central planetary gear double eccentric disc of a two-stroke, γ = 90 assembling type central planetary gear double eccentric disc 2 cylinder 1 crankpin type 4 cylinder cycloid engine.   It is a substantive diagram of an assembly type half planetary gear double eccentric disk of a two stroke, γ = 90 assembling type central planetary gear double eccentric disk 2 cylinder 1 crankpin type 4 cylinder cycloid engine.

The present invention is disclosed by the embodiments shown in FIG. 1, FIG. 2, FIG. 3 and FIG. FIG. 1 shows an example of a 2n-cylinder cycloid engine disclosed in Patent Document 1, in an assembly-type four-cylinder cycloid engine with two strokes and a cylinder arrangement angle γ = 90. Instead of a planetary gear double eccentric disc.
In FIG. 1B, the cylinder head 3, the cylinder 2 and the piston ring 5 simply show the cylinder 1, and the crankcase 1 shows only the support portion of the crank web bearing. Also known are cylinder head intake / exhaust valves, cylinder scavenging / exhaust ports, spark plugs, fuel injection nozzles and oil seals, oil passages, lubrication pumps, and cylinder head / cylinder screw fastening according to engine specifications. The explanation is omitted because it is not directly related to the essence of the invention.

The basic structure and motion of the mechanism are as described in [0002] and [0003].
FIG. 2 exemplifies an assembling-type central planetary gear double eccentric disk in which a central planetary gear 9b with a fitting tooth and an eccentric disk 9a with two fitting tooth grooves are assembled in a 2-stroke, γ = 90 4-cylinder cycloid engine. Yes. The central planetary gear 9b with fitting teeth can be cut by a general method. In addition, because of such mating assembly, the assembled central planetary gear double eccentric disc has high accuracy and high function.

FIG. 3 shows an assembly type split type central planetary gear of a 4-cylinder cycloid engine with two strokes, γ = 90, as an assembly type split type central planetary gear double eccentric disc used in place of the assembly type central planetary gear double eccentric disc in the previous section. A double eccentric disc is illustrated. As the divided parts, there are shown a part 9a ^L and a part 9a ^U not including the eccentric center of the double eccentric disk with fitting tooth grooves, and parts 9b ^α and 9b ^β of the central planetary gear with fitting teeth. Basically, a plane divided into two planes including the shaft center of the planetary gear is used as a joint surface S, and this split-fitting toothed groove eccentric disc 9a is integrally coupled with a screw 12. If this is used, an integrated crankshaft can be used instead of an assembly-type crankshaft, facilitating assembly and maintenance and replacement of crankpin bearings and planetary gears.

  FIG. 4 shows a four-cylinder cycloid with two strokes and γ = 90 as an assembled half-split central planetary gear double eccentric disc used instead of the assembled split central planetary gear double eccentric disc in the previous section. An example of an assembly type half-split central planetary gear double eccentric disc is shown. The superscript is a display associated with the upper and lower parts of the part, and the superscripts L and U indicate the part not including the center of the eccentric disk and the part including the center of the assembled central planetary gear double eccentric disk, respectively. This split-type fitting tooth grooved eccentric disc 9a is moved in the radial direction and assembled with the planet gear 9b with fitting teeth and integrally connected by screws 12. If this is used, it will be easier to assemble the crankshaft system and to maintain and inspect the crankpin bearings and planetary gears.

1 crankcase 2 _K cylinder 3 _K cylinder head 4 _K cylinder K piston 4a _K cylinder of the piston head portion 4b _K cylinder K of K piston rod portion 4c _K cylinder K of the piston big end 5 the piston ring 6 crankshaft 6a crank web 6b crank webs 7 crankpin bearing 8 crank webs bearing 9 _K central planetary gear double eccentric plate 9b _K cylinder K with split fitting teeth of mating toothed central planetary gear 9b _K ^alpha / 9b _K ^beta cylinders K dated crankpin eccentric Release bearing of a stationary internal gear 11 _K cylinder K of a central planetary gear 9a _K cylinder fitting teeth grooved eccentric Edition 9a _K of K ^U / _9a ^{K L} cylinders K of the split-type fitting teeth grooved eccentric Release 10 _K cylinder K 12 percent-type fitting teeth grooved eccentric Release assembly screws 13 of the central crank web bearing C _K cylinder K of the cylinder center line O1 crankshaft axis O2 _K cylinder K Crankpin axis O3 _K cylinder K eccentric Release axis S _K prefabricated split central planetary gear double eccentric plate the upper and lower joint surfaces γ-cylinder arrangement angle (deg)
ω Crank angular velocity subscript K Cylinder number indicating engine ignition sequence Upper subscript L Lower part of eccentric disc with split fitting tooth groove Upper subscript U Upper part of eccentric disc with split mating tooth groove Upper subscript α / β Split type Half of the central planetary gear with mating teeth Note that the subscript K indicating the cylinder number is displayed only when necessary. In addition, when cylinders 2 and 3 are involved, K is displayed as 23.

Claims (4)

  A reciprocating engine with a transmission mechanism based on an assembly-type central planetary gear double eccentric disc 2-cylinder 1 crankpin type hypocycloid planetary gear mechanism that creates linear reciprocating motion.   2. A reciprocating engine according to claim 1, wherein the assembly type central planetary gear double eccentric disk is replaced with an assembly type split type central planetary gear double eccentric disk.   A reciprocating engine according to claim 1, wherein the assembled central planetary gear double eccentric disk is replaced with an assembled half-split central planetary gear double eccentric disk.   A pump device using the reciprocating engine mechanism according to claim 1, 2, and 3.

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