CN2516727Y

CN2516727Y - Engine starting device

Info

Publication number: CN2516727Y
Application number: CN 01275043
Authority: CN
Inventors: 崔珏农; 王飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-26
Filing date: 2001-11-26
Publication date: 2002-10-16
Anticipated expiration: 2011-11-26

Abstract

The utility model relates to an engine starting device, particularly an engine starting device with a fluid pressure accumulation mechanism, which belongs to the technical field of engine starting. The utility model aims to solve the technical problems that the utility model provides a starting device which can start an engine under the situation that the pressure is not reduced, and the starting device has the advantages of long service life and low failure rate. Three interfaces of a two-position three-way valve are respectively connected to a plunger pump, a hydraulic motor and an accumulator; a transmission shaft is installed on a case body of a transmission case and is in splined connection with a shifting slide gear; a push-pull rod is connected between a shifting fork of the gear and a swing arm of a connected shaft; a rotor journal of the connected shaft fixed with a control rod contacts a valve core rod; a rotor journal of the transmission shaft contacts the working end of the plunger pump; a driving gear is fixed on a power output shaft of the motor. The engine starting device with a fluid pressure accumulation mechanism can easily start an engine under the situation that the pressure is not reduced. The utility model has advantages of long service life, low failure rate and reliable operation, and is suitable to start a diesel with a cylinder or more cylinders below 30 h. p.

Description

Engine starting gear

Technical field

The utility model relates to a kind of engine starting gear, and particularly a kind of engine starting gear with hydrodynamic pressure accumulating mechanism belongs to the engine start technical field.

Background technique

Disclose a kind of engine starting gear among the Chinese patent CN2295056Y, it is mainly by spring remontoir, starting control mechanism, energy storage automatic spacing mechanism and automatic-separation mechanism.It is a kind of starting arrangement with machine power storage of spring type, and its deficiency is:

1. under the situation that motor does not reduce pressure, use this machine starting, overcome bigger starting resistance, like this, can cause the fuel-oil atmozation of motor bad because of rotating speed is low, mix bad, so starting difficulty, even fail to start;

2. increase decompression release linkage, under the situation of motor decompression, use this machine starting, the starting reliability height, but the cost of decompression release linkage is too high;

3. lack the working life of clockwork spring, and the rate of fault of this machine is higher.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of engine starting gear, and this device can be piloted engine under the situation that motor does not reduce pressure smoothly, and this device long service life, and rate of fault is low, reliable operation.

It is as follows to solve the problems of the technologies described above the technological scheme that is adopted:

A kind of engine starting gear, it comprises the hydrodynamic pressure accumulating mechanism in constituting, transmission case and fuel tank, transmission case comprises casing again, be fixed in the plunger pump on the casing, oil hydraulic motor, two position three-way valve and the transmission shaft that links to each other with casing through bearing, said hydrodynamic pressure accumulating mechanism comprises cylinder body and piston, piston is divided into two cavitys with cylinder body, wherein, one is the pressurized air air cavity, another is a hydraulic fluid chamber, be connected with high-pressure oil pipe between an interface of hydraulic fluid chamber and two position three-way valve, be provided with connecting tube between another interface of the filler opening of said oil hydraulic motor and two position three-way valve, the oil outlet of oil hydraulic motor links to each other with fuel tank, be fixed with driving gear on the pto of oil hydraulic motor, be connected with high-pressure oil pipe and relief valve between the 3rd interface of the oil outlet of said plunger pump and two position three-way valve, the filler opening of plunger pump links to each other with fuel tank, the working end of plunger pump contacts with the eccentric journal place of transmission shaft, be connected for spline between transmission shaft and driven shifting slide gear, the pull bar of driven shifting slide gear shift fork links to each other with the swinging arm of couple axle one end, the couple axle the other end is fixed with operating handle, and the eccentric journal place of couple axle contacts with the valve core rod of two position three-way valve.

Between above-mentioned engine starting gear, the axle bed of said couple axle and the valve body of two position three-way valve for being threaded.

Above-mentioned engine starting gear, the axle bed of said couple axle can be fixed with casing.

Above-mentioned engine starting gear, said couple axle is provided with Returnning spring, Returnning spring is cylindroid helicalcoil extension spring or cylindroid helicalcoil torsion spring, to guarantee that engine start rear drive gear and driven gear are in separated state, guarantee that simultaneously the spool of two position three-way valve closes the oil-feed oil circuit of oil hydraulic motor.

Above-mentioned engine starting gear, the connecting end of said transmission shaft and engine crankshaft is provided with engaging and disengaging gear.

Above-mentioned engine starting gear, the set engaging and disengaging gear of the connecting end of said transmission shaft and engine crankshaft is a clutch cover, is spline between clutch cover and transmission shaft and engine crankshaft and is connected, clutch cover is provided with shift fork.

When transmission shaft and engine crankshaft are normal jointing state, after finishing, plunger pump is quit work in the accumulating mechanism accumulation of energy, to avoid doing idle work, above-mentioned engine starting gear is provided with engaging and disengaging gear between the working end of said plunger pump and the eccentric journal of transmission shaft.

Above-mentioned engine starting gear, said engaging and disengaging gear are a trip(ping) lever and the driving lever that cooperates with trip(ping) lever.

Engine starting gear provided by the utility model can be piloted engine under the situation that motor does not reduce pressure smoothly.This device long service life, rate of fault is low, reliable operation.This device is applicable to the starting of single cylinder diesel below 30 horsepowers and multi-cylinder diesel engine.

Description of drawings

Fig. 1 is the A-A sectional structure schematic representation of embodiment Fig. 2 of the utility model;

Fig. 2 is that figure cuts open in the office of overlooking that Fig. 1 removes the hydrodynamic pressure accumulating mechanism;

Fig. 3 is another embodiment's of model utility a schematic top plan view.

Embodiment

The utility model is described in further detail below in conjunction with embodiment's accompanying drawing:

Referring to Fig. 1, Fig. 2, this device comprises hydrodynamic pressure accumulating mechanism 24, transmission case 18, plunger pump 6 on transmission case 18 comprises casing 17 again and is fixed in casing 17, oil hydraulic motor 19, two position three-way valve 2, the transmission shaft 29 that links to each other with casing 17 through bearing 28,34, said hydrodynamic pressure accumulating mechanism 24 comprises cylinder body 23 and piston 22, and the also available oil resistant rubber air bag of piston 22 substitutes.Piston 22 is divided into two cavitys with cylinder body 23, and wherein, one adds the compression air for compression air cavity 25 to this chamber, makes its pressure reach 2MPa, and another is a hydraulic fluid chamber 26, is connected with high-pressure oil pipe 1 between an interface of hydraulic fluid chamber 26 and two position three-way valve 2.Be provided with connecting tube 21 between another interface of the filler opening of said oil hydraulic motor 19 and two position three-way valve 2, the oil outlet 20 of oil hydraulic motor 19 links to each other with fuel tank, among the figure fuel tank is omitted, and is not shown.Be fixed with driving gear 31 on the pto 32 of oil hydraulic motor 19.Be connected with high-pressure oil pipe 4 and relief valve 5 between the 3rd interface of the oil outlet of said plunger 6 and two position three-way valve 2, also can adorn pressure gauge on the high-pressure oil pipe 4.The filler opening 7 of plunger pump 6 links to each other with fuel tank, and the working end 35 of plunger pump 6 contacts with eccentric journal 33 places of transmission shaft 29.In order to reduce friction, rolling bearing 36 is equipped with at eccentric journal 33 places, and 27 of transmission shaft 29 and driven shifting slide gears are for spline is connected, and the pull bar 15 of the shift fork 30 of driven shifting slide gear 27 links to each other with the swinging arm 16 of couple axle 11 1 ends.Couple axle 11 the other ends are fixed with operating handle 10, and eccentric journal 12 places of couple axle 11 contact with the valve core rod 3 of two position three-way valve 2.The axle bed 13 of couple axle 11 is threaded with the valve body of two position three-way valve 2, and axle bed 13 also can be fixing with casing 17, and couple axle 11 is provided with cylindrical screw reverse reset spring 14-1, and spring 14-1 one end links to each other with axle bed 13, and the other end links to each other with swinging arm 16.The working end 35 of

plunger

6 and 33 of the eccentric journals of transmission shaft 11 can be established engaging and disengaging gear, and this engaging and disengaging gear can be a trip(ping) lever 9 and the driving lever 8 that cooperates with trip(ping) lever 9.Transmission shaft 29 can adopt spline to be connected with engine crankshaft.

The working procedure of this device is such: the starting first time of motor, and can be by means of manpower.When to the accumulation of energy of this device, operating handle 10 is in original position, at this moment, the spool 39 of valve core rod 3 lower ends of two position three-way valve 2 is closed the oil-feed oil circuit of oil hydraulic motor 19, driving gear 31 is in separated state with driven gear 27, motor after the starting drives transmission shaft 29 and rotates, the eccentric journal 33 of transmission shaft 29 presses the working end 35 of plunger pump 6 repeatedly by rolling bearing 36, make plunger pump 6 work, the hydraulic oil that plunger pump 6 pumps is through high-voltage tube 4, two position three-way valve 2 and high-pressure oil pipe 1 are transported to the hydraulic fluid chamber 26 of hydrodynamic pressure accumulating mechanism 24, simultaneously, pressurized air in the compressed air cell 25 is continued compression, when pressure reaches 13-17MPa, promptly reaches when limiting pressure, relief valve 5 is opened and is begun overflow, stops accumulator 24 pressurization accumulation of energys.At this moment can promote driving lever 8, make outwards pulling trip(ping) levers 9 of driving lever 8, and then the working end 35 of pulling plunger pump 6, make it break away from contacting of rolling bearing 36 on the eccentric journal 33 with transmission shaft 29, promptly allow plunger pump 6 quit work, at this moment, whole accumulation of energy process end.Motor can use this device to start from starting for the second time.When piloting engine with this device, outwards spur operating handle 10 with hand, couple axle 11 is rotated, at this moment eccentric journal 12 places on the couple axle 11 just promote valve core rod 3 and spool 39 downwards, open the oil-feed oil circuit of oil hydraulic motor 19, make the interface conducting of interface that two position three-way valve 2 links to each other with accumulator 24 and two position three-way valve 2 and oil hydraulic motor 19, the high pressure oil in the accumulator 24 just promotes oil hydraulic motor 19 work.In addition, when valve core rod 3 and spool 39 are pushed down, swinging arm 16 on the couple axle 11 makes driven gear 27 outside slippages by shift fork pull bar 15, shift fork 30, and with driving gear 31 engagement, the oil hydraulic motor 19 of starting working is by driving gear 31, driven gear 27 rotates transmission shaft 29, and then drives the engine crankshaft rotation, makes engine start.Afterwards, discharge operating handle 10, valve core rod 3 and spool 39 are resetted, promptly cut off being communicated with of accumulator 24 and oil hydraulic motor 19, simultaneously, driven gear 27 is separated with driving gear 31, at this moment, can discharge driving lever 8, plunger pump 6 is reworked, give accumulator 24 pumps oil pressurization accumulation of energy once more, in order to starting once more.

Referring to Fig. 3, being connected of bent axle can establish engaging and disengaging gear on the transmission shaft 29 of this device and the motor, this engaging and disengaging gear can be selected multiple known technology for use, as shown, the set engaging and disengaging gear of the connecting end of transmission shaft 29 and engine crankshaft is a clutch cover 38, be spline between clutch cover 38 and transmission shaft 29 and engine crankshaft and be connected, clutch cover 29 is provided with shift fork 37.The Returnning spring of couple axle 11 can be a circle spiral stretching spring 14-2, and the end of spring 14-2 links to each other with casing 17, and the other end links to each other with swinging arm 16.

Claims

1. engine starting gear, it is characterized in that comprising hydrodynamic pressure accumulating mechanism [24], transmission case [18] and fuel tank, transmission case [18] comprises casing [17] in constituting, be fixed in the plunger pump [6] on the casing [17], oil hydraulic motor [19], two position three-way valve [2] and through bearing [28], [34] transmission shaft [29] that links to each other with casing [17], said hydrodynamic pressure accumulating mechanism [24] comprises cylinder body [23] and piston [22], piston [22] is divided into two cavitys with cylinder body [23], wherein, one is pressurized air air cavity [25], another is hydraulic fluid chamber [26], be connected with high-pressure oil pipe [1] between an interface of hydraulic fluid chamber [26] and two position three-way valve [2], be provided with connecting tube [21] between another interface of the filler opening of said oil hydraulic motor [19] and two position three-way valve [2], the oil outlet [20] of oil hydraulic motor [19] is connected with fuel tank, be fixed with driving gear [31] on the pto [32] of oil hydraulic motor [19], be connected with high-pressure oil pipe [4] and relief valve [5] between the 3rd interface of the oil outlet of said plunger pump [6] and two position three-way valve [2], the filler opening [7] of plunger pump [6] links to each other with fuel tank, locate to contact with the eccentric journal [33] of transmission shaft [29] in the working end [35] of plunger pump [6], be connected for spline between transmission shaft [29] and driven shifting slide gear [27], the pull bar [15] of driven shifting slide gear [27] shift fork [30] links to each other with the swinging arm [16] of a couple axle [11] one ends, couple axle [11] the other end is fixed with operating handle [10], and the eccentric journal [12] of couple axle [11] is located to contact with the valve core rod [3] of two position three-way valve [2].

2. the engine starting gear according to claim 1 is characterized in that, between the axle bed [13] of said couple axle [11] and the valve body of two position three-way valve [2] for being threaded.

3. engine starting gear according to claim 1 and 2 is characterized in that, fixedlys connected between the axle bed [13] of said couple axle [11] and casing [17].

4. engine starting gear according to claim 1 and 2 is characterized in that, said couple axle [11] is provided with Returnning spring [14], and Returnning spring [14] is cylindroid helicalcoil extension spring [14-2] or cylindroid helicalcoil torsion spring [14-1].

5. engine starting gear according to claim 1 and 2 is characterized in that, said transmission shaft [29] is provided with engaging and disengaging gear with the connecting end of engine crankshaft.

6. engine starting gear according to claim 5, it is characterized in that, the set engaging and disengaging gear of the connecting end of said transmission shaft [29] and engine crankshaft is a clutch cover [38], be spline between clutch cover [38] and transmission shaft [29] and engine crankshaft and be connected, clutch cover [38] is provided with shift fork [37].

7. engine starting gear according to claim 1 and 2 is characterized in that, is provided with engaging and disengaging gear between the working end [35] of said plunger pump [6] and the eccentric neck [33] of transmission shaft [29].

8. engine starting gear according to claim 7 is characterized in that, said engaging and disengaging gear is a trip(ping) lever [9] and the driving lever [8] that matches with trip(ping) lever [9].