CN201694785U

CN201694785U - Hydraulic jack of combined anti-rebound check valve

Info

Publication number: CN201694785U
Application number: CN2010202417473U
Authority: CN
Inventors: 陈有源
Original assignee: Changshu Tongrun Auto Accessory Co Ltd
Current assignee: Anhui Tongrun Auto Parts Co., Ltd.
Priority date: 2010-06-29
Filing date: 2010-06-29
Publication date: 2011-01-05
Anticipated expiration: 2020-06-29

Abstract

The utility model discloses a hydraulic jack of a combined anti-rebound check valve, which is characterized in that: a tandem check valve in clearance fit with a base positioning hole is arranged between pressure oil way and a cylinder working oil chamber; a sealing assembly is arranged on the valve body; a first check valve chamber is arranged on the upper part of the tandem check valve; a second check valve chamber is arranged on the lower part of the tandem check valve; the first check valve chamber and the second check valve chamber are communicated through a valve oilway hole; the first check valve chamber is directly communicated with the cylinder working oil chamber above the first check valve chamber; a central line of hole of the second check valve chamber is biased at one side of the central line of the valve oilway hole; a first steel ball of the tandem check valve forms one check valve seat at an upper orifice of the valve oilway hole, and a second steel ball of the tandem check valve forms the other check valve seat at an orifice of the second pressure oil way. A secondary pressure oil check valve in the tandem check valve is effectively connected in series, so as to eliminate the serious defect that an operator is damaged by handle rebound as a primary check valve does not lock high-pressure oil.

Description

The hydraulic jack of combination antibouncing check valve

Technical field

The utility model relates to hydraulic jack, especially relates to a kind of hydraulic jack that makes up the antibouncing check valve.

Background technology

The pressure oil tech of the existing hydraulic jack in the whole world, it nearly all is the pressurize structure that adopts its valve seat of one-level check valve steel ball locking stereotypedly, the author's defective of its structure of exaggerating purposely of painstakingly not going to gossip, really be because hydraulic jack withstands in dynamic load operation or the actual combat use, bring injury once for a lot of users, the author was also seriously wounded face by the unexpected malfunctioning sudden resilience operating handle that causes of the one-way valve seat of this conventional confguration as the operator before the more than ten years, the oral cavity, lip, tooth, thereby long-term next, I take to heart to this potential safety hazard of hydraulic jack.

After traditional hydraulic jack was screwed fuel-return valve, displacement pump core assembly upper and lower, back and forth was pressed into the oil cylinder working oil chamber again after just making hydraulic oil constantly be inhaled into pump chamber.Normally functioning hydraulic jack withstands on by the hydraulic oil in the pump chamber in the operation of weight handle through after high pressure presses oil circuit, high pressure check valve to enter the oil cylinder working oil chamber under the load, the user promptly can discharge the operating effort that is applied on the handle, just very fast high pressure oil sealing and the pressurize of automatic blocking will enter the oil cylinder working oil chamber under the effect of high pressure oil of described high pressure check valve.Yet cross described high pressure one-way valve seat, high pressure and press oil circuit to be back to pump chamber percussion pump core assembly hastily to move press hand and the operating handle that cause with its rotation connects on fast and rotate up hastily around relevant bearing pin and wound the operator owing to rubbish residual in material defective intrinsic on this one-way valve seat and the hydraulic oil all can cause high pressure oil in the oil cylinder working oil chamber.Although it is less the probability of this phenomenon to occur, its harmfulness is enough to make each party to imprint on the bones and the memory.People are to malfunctioning being analyzed as follows of this hydraulic jack one-way valve structures: the base of hydraulic jack or oil cylinder seat, generally adopt such as watering steel, the Casting Parts of spheroidal graphite iron class, intrinsic such as shrinkage porosite on this one-way valve seat, sand holes, in material defectives such as pore and the hydraulic oil residual granulated garbage be positioned in sometimes very skilfully the unidirectional valve seat of above-mentioned high pressure near, be difficult to be realized in common metal processing and the detection, damage is hit by high pressure oil suddenly by the place at jack hydraulic system works valve seat sometimes in service, valve seat is also just no longer complete, and pressurize is not just known where to begin yet; Equally sometimes, the valve seat place is by chance stifled has gone up the granulated garbage in the hydraulic oil, and the high pressure oil that has entered the oil cylinder working oil chamber also just can not be wherein locked, and described high pressure oil all can be back to pump chamber and lead to the consequence of wounding human body in moment under two kinds of situations.For a long time, people have analyzed the reason and the harm of the rebound of this high pressure, but can't overcome it effectively, thereby maker highlights to the client that human body should depart from operating handle as far as possible in the operation, yet accident still takes place.

Summary of the invention

In view of the situation of above-mentioned prior art or the outwardness of latent dangerous factor, the purpose of this utility model is to propose a kind of design plan of antibouncing combine valve of the secondary check valve of connecting, the high pressure check valve fabricate block of tool two pass defence line function is set between high-low pressure two zones dexterously, solves the danger of " the high pressure rebound " that do not overcome for many years with simple in structure, with low cost, the tangible embedded valve piece of effect effectively.

Above-mentioned purpose of the present utility model is achieved through the following technical solutions: a kind of hydraulic jack that makes up the antibouncing check valve, comprise base, cylinder component, the pump housing, the pump core assembly, press hand, handle, pump chamber, the oil sucting one-way valve steel ball, oil suction line, press oil circuit, press oily check valve steel ball, the oil cylinder working oil chamber, it is characterized in that: press and be provided with the check valve body of connecting of implementing free-running fit with the base knock hole between oil circuit and the oil cylinder working oil chamber, and on this valve body, be provided with poted assemblies, be provided with the first unidirectional valve chamber on the series connection check valve body, its underpart is provided with the second unidirectional valve chamber, valve body oil circuit hole is communicated with the first unidirectional valve chamber and the second unidirectional valve chamber, the oil cylinder working oil chamber of the first unidirectional valve chamber and its top is straight-through, the line of centers that the centerline hole of the second unidirectional valve chamber departs from valve body oil circuit hole can not stop up stomidium mouth under the described valve body oil circuit hole to satisfying series connection check valve second steel ball in the hydraulic oil transmission, series connection check valve first steel ball place, aperture on valve body oil circuit hole forms unidirectional valve seat, and series connection check valve second steel ball presses place, oil circuit aperture to form another unidirectional valve seat second.

The beneficial effect that the utility model compared with prior art has is: increase the check valve body of connecting that is sealed and matched with the base knock hole on the structure of conventional hydraulic jack, realization is pressed effective serial connection of oily check valve to secondary, and eliminate hydraulic jack because the one-level check valve closes handle that oil cylinder working oil chamber mesohigh oil incessantly brings operator's the critical defect of causing injury that knock-ons.

Description of drawings

The description of drawings of embodiment:

Shown in Figure 1 is the front view of the embodiment hydraulic jack of the utility model;

Fig. 2 is the part sectional view of relative Fig. 1;

Fig. 3 is " A-A " cutaway view among Fig. 1;

Fig. 4 is the birds-eye view of relative Fig. 1;

Fig. 5 is " B-B " part sectional view on Fig. 4;

Fig. 6 is that the part sectional view of amplifying at 2: 1 is pressed in " C-C " rotation on Fig. 4;

Fig. 7 is " D-D " part sectional view on Fig. 4.

The parts title is as follows shown in each label of accompanying drawing:

1 base, 2 pump chambers, 3 pump housings, 4 pump core assemblies, 5 first bearing pins, 6 press hand, 7 cylinder components, 8 hydraulic oil, 9 piston rod parts, 10 shoe cream rooms, 11 outer jacket members, 12 first screw thread pairs, 13 top cap assemblies, 14 move revolute pair, 15 oil cylinder working oil chambers, 16 second screw thread pairs, 17 the 3rd screw thread pairs, 18 croisillon de joint homocinetiques, 19 press the hand connecting rod, 20 second bearing pins, 21 plug cocks, 22 oil return valve rod assemblies, 23 handles, 24 valve body oil circuit holes, 25 second press oil circuit, 26 second unidirectional valve chambers, 27 series connection check valve body, 28 series connection check valves, second steel ball, 29 series connection check valves, first steel ball, 30 knock holees, 31 first unidirectional valve chambers, 32 first press oil circuit, 33 oil sucting one-way valve steel balls, 34 oil suction lines, 35 high-pressure oil passages, 36 oil return circuits, 37 fuel-return valve steel balls, 38 poted assemblives.

The specific embodiment

The utility model will be further described below in conjunction with the accompanying drawing of embodiment, will help the understanding to the utility model technology contents and effect, but embodiment do not constitute the restriction to technical solutions of the utility model.

By each figure of the embodiment of the described utility model of this case on common vertical hydraulic jack as seen, jack base 1 connects by screw thread pair 17 with the pump housing 3; To press hand 6 and pump core assembly 4 with first bearing pin 5, second bearing pin 20 respectively and rotate and connects, will press hand 6 and press 19 rotations of hand connecting rod and connect; Make with croisillon de joint homocinetique 18 and to press hand connecting rod 19 and base 1 and rotate and connect; Handle 23 front end rigions and the knock hole free-running fit of pressing hand 6; Make base 1 and cylinder component 7 implement sealed attachment with second screw thread pair 16; Piston rod part 9 is inserted and is formed the axis hole free-running fit in the hole of cylinder component; Outer jacket member 11 so that first screw thread pair 12 presses down top cap assembly 13 to be positioned at base 1 reaches lock sealing, and hole and piston rod part 9 cylindricals form mobile revolute pair 14 within the top cap assembly 13, inject quantitative hydraulic oil 8 in shoe cream room 10; Outer jacket member 11 is provided with plug cock 21.

By Fig. 5, Fig. 6, Fig. 7 as seen, base 1 inside is provided with oil suction line 34 and the oil sucting one-way valve steel ball 33 that is communicated with shoe cream room 10; Be provided with oil return valve rod assembly 22 and fuel-return valve steel ball 37; Can oil return valve rod assembly 22 hold out against or unclamp fuel-return valve steel ball 37 and implement the high-pressure oil passage 35 of the straight-through oil cylinder working oil chamber 15 of its front end to be blocked closely with the oil return circuit 36 that is communicated with shoe cream room 10 or be communicated with.Base 1 is provided with oil suction line 34, oil sucting one-way valve steel ball 33 between pump chamber below the pump core assembly 42 and shoe cream room 10 again; Between pump chamber 2 and oil cylinder working oil chamber 15, be provided with first and press oil circuit 32, press the aperture and check valve second steel ball 28 of connecting of the second pressure oil circuit 25 of oil circuit 32 connections to form unidirectional valve seat with first; Cooperated series connection check valve body 27 by between centers unoccupied place, poted assemblies 38 hole in the knock hole 30 of base 1, be provided with the first unidirectional valve chamber 31, series connection check valve first steel ball 29 on the series connection check valve body 27, valve body oil circuit hole 24 is combined into unidirectional valve seat with check valve first steel ball 29 of connecting, and valve body oil circuit hole 24 is communicated with the second unidirectional valve chamber 26; Second presses oil circuit 25 to be communicated to the second unidirectional valve chamber 26 through series connection check valve second steel ball 28, because the centerline hole in valve body oil circuit hole 24 is biased in a side of the centerline hole of the second unidirectional valve chamber 26, has guaranteed that series connection check valve second steel ball 28 never stops up stomidium mouth under the valve body oil circuit hole 24 in hydraulic oil upper punch process.

To the utility model embodiment is operation like this: screw oil return valve rod assembly 22, with being communicated with of fuel-return valve steel ball 37 and valve seat thereof blocking-up high-pressure oil passage 35 and oil return circuit 36, operating handle 23 insertions are pressed in the mating holes of hand 6, on the handle of raising one's hand make and press hand 6, press hand connecting rod 19 in combination around first bearing pin 5, second bearing pin 20, croisillon de joint homocinetique 18 rotates, so that pump core assembly 4 in pump chamber 2 to top offset, because negative pressure appearance, hydraulic oil in the shoe cream room 10 is by way of oil suction line 34, oil sucting one-way valve steel ball 33 enters pump chamber 2, handle 23 is being pressed down in the process, pressure oil in the pump chamber 2 is promptly depressed oil sucting one-way valve steel ball 33, make it valve seat steel ball closure therewith, the fluid of being pressed in the pump chamber 2 is pressed oil circuit 32 through first, second presses oil circuit 25, series connection check valve second steel ball 28 enters the second unidirectional valve chamber 26, again through valve body oil circuit hole 24, series connection check valve first steel ball 29 enters first unidirectional valve chamber 31 and the oil cylinder working oil chamber 15, to promote upwards jacking weight of piston rod assembly 9; And when handle pressed to the minimum space of pump chamber, in the moment that discharges the handle operating effort, to connect the at once valve seat at check valve first steel ball 29 places of pressure oil in the first unidirectional valve chamber 31 is closed, pump up and down with this reciprocation cycle pump core assembly is moving, hydraulic oil in the oil cylinder working oil chamber 15 is on the increase, thus constantly promote piston rod assembly 9 to top offset.Because the defect in material that may exist, when check valve first steel ball 29 of will connecting with high pressure oil is locked in its valve seat, if it is breakdown to meet the valve seat place, high pressure oil is back to suddenly in 24, the second unidirectional valve chamber 26 of valve body oil circuit hole, series connection check valve second steel ball 28 can be in moment and its valve seat closure, continues the disastrous effect of pressing oil circuit 25 backflows human body in order to avoid the kick of initiation operating handle is caused injury to second thereby reach fast automatic ground cut off high oil.After being finished using, hydraulic jack can unscrew oil return valve rod assembly 22, make the high pressure oil in the oil cylinder working oil chamber 15 be back to oil return circuit 36 and enter shoe cream room 10, drop to desired height until jack piston rod unit 9 through high-pressure oil passage 35, fuel-return valve steel ball 37.

Claims

1. hydraulic jack that makes up the antibouncing check valve, comprise base, cylinder component, the pump housing, pump core assembly, press hand, handle, pump chamber, oil sucting one-way valve steel ball, oil suction line, pressure oil oil circuit, press oily check valve steel ball, oil cylinder working oil chamber, it is characterized in that: press to be provided with the check valve body that is in series with the secondary check valve (27) of implementing free-running fit with base knock hole (30) between oil circuit (32) and the oil cylinder working oil chamber (15), and on this valve body, be provided with poted assemblies (38).

2. the hydraulic jack of combination antibouncing check valve according to claim 1, its feature also is: be provided with the first unidirectional valve chamber (31) on the series connection check valve body (27), its underpart is provided with the second unidirectional valve chamber (26), valve body oil circuit hole (24) is communicated with the first unidirectional valve chamber and the second unidirectional valve chamber, and the first unidirectional valve chamber (31) is straight-through with the oil cylinder working oil chamber (15) of its top.

3. the hydraulic jack of combination antibouncing check valve according to claim 1, its feature also is: the centerline hole of the second unidirectional valve chamber (26) is biased in a side of the line of centers in valve body oil circuit hole (24).

4. the hydraulic jack of combination antibouncing check valve according to claim 1, its feature also is: series connection check valve first steel ball (29) place, aperture on valve body oil circuit hole (24) forms unidirectional valve seat, and series connection check valve second steel ball (28) presses place, oil circuit (25) aperture to form another unidirectional valve seat second.