CN2464705Y

CN2464705Y - Double-cylinder jack

Info

Publication number: CN2464705Y
Application number: CN 01205342
Authority: CN
Inventors: 唐坤瑞; 方福根; 徐勤业
Original assignee: DADA MACHINERY (HANGZHOU) PLANT Co Ltd
Current assignee: DADA MACHINERY (HANGZHOU) PLANT Co Ltd
Priority date: 2001-02-15
Filing date: 2001-02-15
Publication date: 2001-12-12
Anticipated expiration: 2011-02-15

Abstract

The utility model relates to a jack which is composed of a piston group, a plunger pump, an oil storage tank and a base. The utility model is characterized in that two sets of piston groups are installed on the base of the jack. The piston group is composed of two cylinder bodies, two pistons and two piston rods, and a return valve, an oil storage tank, two plunger pumps and two relief valves are also installed on the base. The double-cylinder jack doesn't only decrease the height of the jack itself, but the jack also makes operation become portable. The utility model can be used in industries, such as installation and repair, particularly the utility model can be widely applied in the industry of car repair.

Description

A kind of twin-tub jack

The utility model relates to a kind of jack.

Jack in order to repairing trades mostly is a single cylinder in the market, along with industrial expansion, and car industrial expansion particularly, the chassis of car is more and more heavier at present, and liftoff height is also more and more lower.It is also just more and more shorter that jack is started preceding requirement for height.Therefore only thinking hard probably not had potentiality on the basis of present single cylinder jack can dig.Its lifting speed all was the same when the single cylinder jack that uses at present had load or no-load in addition, and slow act like this is an impediment to work efficiency at a high speed in the idle travel before not pushing up loads.

The purpose of this utility model is exactly to change present single cylinder to be designed to the twin-tub design, under identical jacking load, the height of jack self is lowered, to accelerate the lifting speed of jack in idle travel simultaneously, to satisfy the repairing needs of industrial requirement or high-grade car.

The utility model is that fork-like farm tool used in ancient China is realized by the following technical programs: this twin-tub jack bag is scraped by piston set, plunger pump, petrol storage tank and base and is formed, be characterized in that described jack is that two cover piston set are housed on the base, piston set is by two cylinder bodies, two pistons, two piston rods are formed, a fuel-return valve, a petrol storage tank, two plunger pumps and two pressure regulating valves also are housed on base, also be provided with many oil circuits on the base and run through cylinder body, plunger pump and petrol storage tank, two plunger pumps are provided with oil sucting valve separately, and two cylinder bodies are provided with inlet valve separately;

Each cylinder body of above-mentioned twin-tub jack is made up of inner casing and outer shell again, one end of two inner casings is screwed on the base with the Luo line respectively, the cylinder body other end is connected with end cap seal by the Luo line, two ends of outer cylinder body are embedded in respectively in the groove on base and the end cap, one end of piston rod passes end cap and seal ring is exposed, and is hinged by tubular axis and rocking arm set pull bar;

Above-mentioned twin-tub jack is owing to adopted the structure of twin-tub double pump, under same design, the diameter of its cylinder body can be more much smaller than single cylinder, jack unit design height has fallen at the end effectively, the design of double plunger pump, can make jack at Qi Dingshi, jacking speed is doubled; When covering the after load increase in the jack idle travel, low pressure regulating pressure valve is opened automatically, make the high pressure oil of a plunger pump let out back petrol storage tank, have only the high pressure oil of a pump to enter two inner casings this moment, though jacking speed slows down, but the power that acts on plunger pump can reduce half, operates freely light.This jack can be applicable to install, repairing trades, especially can be used widely in the automobile repair industry.

Below in conjunction with accompanying drawing embodiment of the present utility model is further described:

Fig. 1 is the front view of twin-tub jack of the present utility model;

Fig. 2 is the birds-eye view of Fig. 1;

Fig. 3 is a twin-tub bulk junction composition;

Fig. 4 is the upward view of Fig. 3;

Fig. 5 is the oil piping system scheme drawing;

From Fig. 1, Fig. 2 is its profile and running condition and common single cylinder jack it makes no odds as can be known.Its difference is mainly on cylinder body and oil piping system.As can be known, be provided with two cylinder bodies on base 14, each cylinder body is made up of an outer shell 5 and inner casing 4 from Fig. 3, Fig. 4, inner casing 4 is screwed in by the Luo line on the base 14 that is placed with pad 7, and the other end of inner casing 4 is tightly connected with Luo line and end cap 2.Having relief hole 23 near on the inwall of end cap 2 these ends, an end of piston rod 1 passes end cap 2 and seal ring 20 is emerging in the limit, place.Hinged with the pull bar 22 of rocking arm set by tubular axis 21, two plunger pumps 8 are installed in 14 both sides, the end.Two ends of outer shell 5 are embedded in respectively in the groove 3 and 7 on base 14 and the end cap 2, and petrol storage tank 12 is fastening by one piece long Luo bolt of tightening seal washer 11 usefulness 13 and base 14.From Fig. 3,15, two pressure regulating valves of a fuel-return valve 9,17 are housed also on base 14 as can be known among Fig. 4.

The working process of this jack can be referring to Fig. 3, Fig. 4, Fig. 5 illustrate that two plunger pumps 8 start simultaneously when power F acts on pedal, with oil by unidirectional oil sucting valve 25 inspirations and supercharging after check valve entered two inner casings in 27 minutes two the tunnel respectively, make two piston rods 1 rise exhibition simultaneously.Piston rod 1 links to each other with the rocking arm set pull bar by tubular axis 21, thereby makes group 24 jacking work.This moment, two pumps were worked simultaneously because load is lighter, and lifting speed is fast again during than single cylinder.Low pressure modulating valve 17 is opened when the jacking load increases, and makes the oil of a plunger pump let out back petrol storage tank 12, and have only the high pressure oil of a pump to enter two inner casings 4 this moment, makes directed force F reduce half.Can see also that from Fig. 4 chamber inner high voltage oil will flow in the draining chamber of being made up of outer shell 5 and inner casing 4 from relief hole 23 when piston 18 promotion piston rods 1 are moved to the left relief hole 23, the draining chamber communicates with petrol storage tank 12; Under the effect of extension spring 26, make piston reset.

In sum, not only the utility model twin-tub jack the height of jack itself has fallen at the end, and make the operation become light.

Claims

1, a kind of twin-tub jack, comprise piston set (19), plunger pump (8), petrol storage tank (12) and base (14), it is characterized in that being equipped with on the described jack base (14) two cover piston set (19), piston set (19) is by two cylinder bodies, two pistons (18), two piston rods (1) are formed, a fuel-return valve (15) also is housed on base (14), a petrol storage tank (12), two plunger pumps (8) and two pressure regulating valves (9), (17), also be provided with many oil circuits on the base (14) and run through cylinder body, plunger pump and petrol storage tank, two plunger pumps (8) are provided with oil sucting valve (25) separately, and two cylinder bodies are provided with inlet valve (27) separately.

2, according to the described twin-tub jack of claim 1, it is characterized in that cylinder body is made up of inner casing (4) and outer shell (5), one end of two inner casings (4) is screwed on the base (14) with the Luo line respectively, inner casing (4) other end is tightly connected by Luo line and end cap (2), have relief hole (23) on the inner casing near one of end cap, the two ends of outer shell (5) are embedded in respectively in the groove on base (14) and the end cap (2), bottom portion of groove is provided with pad (3), (6), one end of two piston rods (1) passes end cap (2) respectively and seal ring (20) is exposed, and is hinged by tubular axis (21) and rocking arm set pull bar (22).