CN1087808C

CN1087808C - Air cooled power machine

Info

Publication number: CN1087808C
Application number: CN97196351A
Authority: CN
Inventors: 贡纳尔·莱昂伯格
Original assignee: Gul & Co Development AB
Current assignee: Gul & Co Development AB; Gul and Co Dev AB
Priority date: 1996-07-12
Filing date: 1997-07-10
Publication date: 2002-07-17
Anticipated expiration: 2017-07-10
Also published as: AU719711B2; JP4091985B2; RU2175066C2; EP0910726A1; AU3565397A; NZ334072A; EP0910726B1; DE69710893T2; SE508375C2; SE9602758L; CN1225149A; WO1998002639A1; JP2000515216A; DE69710893D1; CA2260141A1; ATE214123T1; SE9602758D0

Abstract

The present invention is for the kind of power machine, engines, pumps or compressors which have two or more pistons which work against each other preferably with a common combustion space or corresponding in a stationary cylinder, and where the power is transmitted to or from a rotating motion without an intermediate crankshaft. Independent of whether the machine works as engine, pump or compressor there is a need to cool the cylinder. For applications such as engines for lawn-mowers and power saws the engines must be air-cooled as in practice it is not possible to arrange a water-cooling system. Cooling of the cylinder is obtained by that holes or channels (30, 31) are arranged both in the rotating and the stationary discs and cooling air is made to flow through these channels. In order to further improve the cooling the outside of the cylinder may have flanges. In other embodiments of the invention the connecting means between the rotating disc and the outgoing shaft are so shaped that they also function as fan blades (34-35) and cause a desired air flow.

Description

Air cooled dynamic power machine

The present invention relates to this type of dynamic power machine, such as motor, pump or compressor, they have two or more pistons of relatively working mutually, and preferably has a common combustion space at fixed cylinder internal, power wherein then sends under the situation that does not have middle bent axle and rotatablely moves, or spreads out of by rotatablely moving.

No matter this machinery is to carry out work by the mode of motor, compressor or pump, all need the countercylinder endoporus to cool off.Concerning using such as some of the motor of mowing machine and power saw, they must be cooled off by air, are very difficult or impossible because constituent is set in practice.

In internal-combustion engine, power is undertaken by certain bent axle or similar device usually from to-and-fro motion to the transmission that rotatablely moves.But, in some situation, particularly when will with have different and usually be directly mutually the to-and-fro motion of opposite direction convert to when rotatablely moving, bent axle is not too suitable.Especially in this class dynamic power machine, as internal-combustion engine, compressor or pump, two pistons are relatively worked in same cylinder bores simultaneously mutually.In these situations, use bent axle will be converted into one together and rotatablely move jointly and can make their complicated in mechanical structureization from the power of two pistons.Alternately, to-and-fro motion and rotatablely move between the transmission of power also can adopt ball bearing to carry out, this ball bearing is along some orbitings, and comprise one by the ball of a ball retainer encirclement, the ball retainer then is connected to a piston rod or similar component, rotatablely moves so that each ball is sent to straight line motion.Also ball can be changed into other device, for example the roller bearing or the pilot pin of rolling or slippage in track with corresponding function.

A kind of such device is arranged, and it has two parallel square positions, have one to be fixed tray in two square positions, and another is a rotating disc with respect to this.At a cylinder that is arranged in relative dish central authorities two pistons are arranged, they are the working piston of internal-combustion engine, and have common combustion space.Fixedly connected piston rod on each piston has the retainer device of a ball in the opposite end of piston rod, install reciprocating power by this and be sent to rotating disc.Ball also plays the bearing effect between fixed tray and the rotating disc.Rotating disc is installed on the retainer, and this retainer transfers to be installed in again on the output shaft, and the rotating force of axle output is used to carry out various driving purposes thus.Ball both can move in the rectilinear orbit in fixed tray, also moved in the common ellipse in rotating disc or other the close-shaped track.In other embodiments, track can be substituted by the edge that raises, therein the side of roller bearing or sliding bearing engagement edge.

The present invention is used for above-mentioned machinery, wherein is provided with the air cooling of cylinder.Air cooling difficulty especially is set in the machinery of the above-mentioned type,, makes enough cooling air flows can not be set because make this mechanical structures have integrity at Known designs medium power conveyer.The present invention installs for this reason by one, and problem provides a solution, this device has and is placed in the common cylinder bores, and two pistons of mutually relative synchronous working, and be used in piston linear motion and transmit the device of power between rotatablely moving, it comprises that at least one rotating disc that has a cam rail or corresponding rising edge therein and a relative power source have second dish of fixing at trapped orbit or edge, wherein, opening is produced on the center of dish, like this, cooling air can be by these openings and along the flows outside of cylinder bores.This device also can have other embodiment.

Embodiment shown in hereinafter inciting somebody to action in conjunction with the accompanying drawings is illustrated invention.

Fig. 1 represents the cross section of the machinery that the present invention proposes.

Machinery and the rectangular cross section of Fig. 1 in Fig. 2 presentation graphs 1.

Machinery and the rectangular cross section of Fig. 1 and 2 in Fig. 3 presentation graphs 1.

Fig. 4 represent another embodiment of the present invention with the corresponding cross section of Fig. 2.

Fig. 5 is a perspective view of the present invention, and wherein some part is shed, and is partial sectional view.

Device shown in the drawings has two parallel square positions, and one is called fixed tray 8, and is called rotating disc 13 with respect to this one.Fixed tray 8 is installed in the housing 9, transfers to feel at ease therein to have adorned a cylinder 1 with end wall 2,3 and coil 8.Two pistons 4,5 as working piston are arranged, and they preferably has common combustion space in internal-combustion engine in cylinder.

What be fixedly attached to each piston 4,5 is a piston rod 6,7, has the retainer device 17,18 of ball 15,16 at the opposed end of piston rod, and reciprocating power sends rotating disc 13 to by means of this.Ball 15,16 also plays the bearing effect between fixed tray 8 and the rotating disc 13.Rotating disc 13 is installed on the retainer 10, and this retainer transfers to be installed in again on the output shaft 23, and Shu Chu rotating force is used to carry out various driving purposes thus.In the most preferred embodiment of invention, the straight line of the central axis of cylinder bores and ball motion coincides.Both motions in the rectilinear orbit 11,24 of fixed tray of ball 15,16, also motion in the common elliptical orbit 12 in rotating disc.

Valve can be installed near the top dead center (UDC) of piston of cylinder bores center opposite side.Corresponding valve seat is arranged in cylinder, and axle then designs according to through hole and the bearing that is arranged near the standing part of cylinder, the axle that stretches out from the cylinder outer end of valve preferably directly contact as the adjustment curve or the contact surface of a rotating disc part.

The cooling of cylinder is by being arranged on hole or the

passage

30,31 in rotation and the fixed tray and flowing through the cooling air acquisition of these passages.In order further to improve cooling effect, the cylinder outside can have flange 32 as illustrated in fig. 1.In most preferred embodiment of the present invention, cooling air is delivered to rotating disc by hollow shaft 33 or from rotating disc output, hollow shaft 33 coils therewith and is connected.Air can or directly flow in axle, or flows in axle installs and fixes tube.This tube can directly or indirectly be connected with fixed tray.Cooling air is drawn towards the both sides of cylinder, and when dynamic power machine is equipped with valve, and valve mainly is mounted to moving direction with piston when meeting at right angles, and four such cooling channels then can be set.In other embodiments of invention, the device that connects rotating disc and output shaft is designed to, and they also play

fan blade

34,35, and cause the air flows of requirement.

Be a most preferred embodiment of the present invention shown in Fig. 5.Wherein fixed tray is constructed to the housing that centers on rotating disc fully and is integral, or forms a part that centers on the housing of rotating disc fully.All lubricating components of device all are positioned at this housing, and housing (referring to Fig. 5) is downwards demarcated by sealed-bearing.The output shaft of drawing from rotating disc is hollow, and cooling air is drawn towards inner bowl shaped space by axle, has placed the cylinder with cooling flange therein.

Air stream also can be used for other purpose in some applications, and is not only cooling.When this dynamic power machine was used as the motor of mowing machine, air stream can be drawn towards the grass that is cut, or grass is blown to the trap of mowing machine, or grass is blown back to blade, made it be cut into littler fragment.

Claims

1, a kind of motive power machine device, this device has and is placed in the common cylinder bores, and two pistons of mutually relative synchronous working, and be used in piston linear motion and transmit the device of power between rotatablely moving, it comprises that at least one rotating disc that has a cam rail (12) or corresponding rising edge therein has trapped orbit (11 with a relative power source, 24) or the edge fix second the dish, it is characterized in that, opening (30,31) be produced on the center of dish, like this, cooling air can be by these openings and along the flows outside of cylinder bores (1).

2, device as claimed in claim 1 is characterized in that, fixed tray (8) is constructed to the housing that centers on rotating disc fully and is integral, or forms its part.

As the device of claim 1 or 2, it is characterized in that 3, rotating disc also can have fan blade (34,35), they cause that forcing of cooling air is mobile.

4, device as claimed in claim 3 is characterized in that, rotating disc is connected with the output shaft of drawing from motor by fan blade (34,35).

5, the device of arbitrary claim as described above is characterized in that the output shaft of drawing from rotating disc is hollow, and cooling air obtains by this axle.