CN2446117Y

CN2446117Y - Lifting hydraulic jack

Info

Publication number: CN2446117Y
Application number: CN 00241719
Authority: CN
Inventors: 张红兵; 贺胜明
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-28
Filing date: 2000-06-28
Publication date: 2001-09-05
Anticipated expiration: 2010-06-28

Abstract

The utility model relates to a lifting hydraulic jack, which is especially suitable for a lifting component of a creeping type scaffold for construction. The lifting hydraulic jack is composed of a base, a cylinder body, a cylinder cover, a stroke adjusting screw nut, a main spring, a main piston, an upper clamping body and a lower clamping body. The utility model is characterized in that three layers of upper clamping seats are arranged on the upper clamping body; the same radius of the three layers of upper clamping seats is provided with a plurality of axial oblique holes; supporting springs and steel balls are arranged in the holes; loosening clamping pawls are respectively arranged on a piston of the upper clamping body and a loosening clamping ring which is connected with the piston of the upper clamping body; the lower clamping body is a cone-shaped wedge block which is composed of four to seven wedge blocks and a point of the same height and the same radius of each wedge side is provided with two tangential straight holes, and spring wires which are movably matched with the holes are arranged in the tangential straight holes.

Description

The lifting mode hydraulic jack

The utility model is a kind of lifting mode hydraulic jack, is particularly useful for the Lift Part of creeping-type scaffold for building.

The inventor once disclosed a kind of lifting mode hydraulic jack (its patent No. is L95216731.X), it is by base, cylinder body, cylinder cap, stroke is reconciled nut, last card body, under block body, main piston, formations such as main spring, on it, following card body is a kind of taper voussoir that the arc rib is arranged that is used for locking and unclamping pilot bar.The lifting mode hydraulic jack of this form because it has many crest lines to contact with pilot bar, can carry great load; But it is operation in the open, and the easily phenomenon that causes coupling mechanism force to descend at taper voussoir place accumulation dirt, and taper voussoir is worked in this environment, and its rate of wear can be accelerated.The improved lifting mode hydraulic jack of inventor utility model patent (patent No. is ZL98212426.0), be characterized in, under block and be provided with card body cylinder sleeve in the body, card body spring reaches, descend two-layer card body seat and staggered several identical inclined holes of quantity up and down that are drilled with on its same circumference, steel ball and support spring that the locking pilot bar is arranged in the hole, the loose snap ring of card body is used to remove the locking of steel ball to pilot bar.Its advantage is: wear-resistant, can remove the dirt that accumulates on pilot bar and the taper voussoir at work, and increased the reliability of open work; But following shortcoming is arranged again: the steel ball of limited amount is a contact to pilot bar, when under heavy lift, working, excessive easily the making on the pilot bar periphery of pressure that its steel ball acts on pilot bar produces indenture, the long-term work meeting makes these indentures form an arcuate furrow, so also relative reduction its coupling mechanism force.

According to above-mentioned the deficiencies in the prior art, the utility model provides a kind of new embodiment: promptly going up the card body is steel ball locking form, and the quantity of increase steel ball is to increase load-carrying capacity, under to block body be the taper Wedge-type, and the taper voussoir is not contacted with pilot bar when releasing orientation to eliminate the accumulation owing to the dirt that is produced in the work, increase the reliability of its work.

Embodiment of the present utility model is: a kind of lifting mode hydraulic jack, it is by base, cylinder body has the cylinder cap of oil inlet, stroke is reconciled nut, main piston, main spring and go up the card body and down the card body form.Its feature is that card body is made up of following part under it, the following card body cylinder sleeve that has oil inlet, its upper end links by screw thread and cylinder body, the lower end links by screw thread and base, the following card body piston that has taper hole is located at down in the card body cylinder sleeve, the upper end of blocking the body spring down withstands on down the lower end of card body piston, its lower end is sitting on the base, the taper voussoir that is the 4-7 lobe is positioned at the taper hole of card body piston down, the bottom of taper voussoir is sitting on the annular boss of base, and locate by the spacing ring that is fixed on down on the card body cylinder sleeve its upper end; The described card body of going up is made up of following part, have oil inlet and in cylinder body, slide up and down on card body cylinder sleeve and on the secondary cylinder sleeve of card body link by screw thread, card body piston is housed in last card body cylinder sleeve, intermediate links by the bottom of screw thread and the secondary cylinder sleeve of last card body, last card body seat E is by the upper end of screw retention at intermediate, its lower end links by screw and last card body seat F and G successively, on the same radius of card body seat on three, be provided with several axial inclined holes, be provided with support spring and steel ball in its hole, the loose claw of last card body seat E is fixed on the lower end of card body piston, the loose claw of last card body seat F and G is fixed on the loose snap ring, the pine snap ring links by passing card body seat E and bolt and last card body piston, on block the body spring last card body piston and on block between the body seat E; Spring wire with its bearing fit is housed in two tangential straight holes that equal height on each side of described taper voussoir and same radius place are provided with.

The utility model has the advantages that: as can be seen from above-mentioned embodiment, because the card body of going up of the present utility model adopts three layers to go up card body seat, make the quantity of its steel ball increase by 2/3rds than the two-layer steel ball number of going up the card body, therefore its load-carrying capacity increases greatly, again because the locking form of steel ball has the effect of removing dirt, created good condition so give the locking of card body taper voussoir down, make it be unlikely to not tight phenomenon to occur locking because of accumulating of dirt, also because equal height and the same radius place of the utility model on each side of blocking body taper voussoir down is provided with two tangential straight holes, in the corresponding aperture of two adjacent conical voussoirs, be equipped with one and be the spring wire of bearing fit with the hole, this measure makes the taper voussoir when unclamping, the cusped edge of its taper voussoir breaks away from pilot bar periphery one segment distance, causes the not tight phenomenon of lock to prevent to pile up dirt on the tapered cotter piece.Because it is big that above-mentioned innovative approach makes the utility model really reach load-carrying capacity, can failure-free work under the poor condition of working environment.

Description of drawings is as follows:

Accompanying drawing is the structural representation of the utility model lifting mode hydraulic jack.

Among the figure 1 is base, and 2 is cylinder body, and 3 is cylinder cap, 4 are stroke conciliation nut, and 5 is main piston, and 6 is main spring, 7 are following card body cylinder sleeve, and 8 are card body piston down, and 10 are card body spring down, 12 are the taper voussoir, 13 is spacing ring, and 14 is last card body cylinder sleeve, and 15 is the secondary cylinder sleeve of last card body, 16 is last card body piston, 17 is intermediate, E, F, G is last card body seat, 18 is the loose claw of last card body seat E, and 19 is the loose claw of last card body seat F, and 20 is the loose claw of last card body seat G, 21 is loose snap ring, and 22 is last card body spring.

Now the utility model is described in further detail in conjunction with the accompanying drawings:

The base 1 that has annular boss links by screw thread and the following card body cylinder sleeve 7 that has oil inlet C, the lower end of cylinder body 2 links by screw thread with following card body cylinder sleeve 7, the upper end links with the cylinder cap 3 that has fuel feed hole A, cylindrical and cylinder cap 3 that stroke is reconciled nut 4 are thread connection, its inner hole surface is bearing fit with the main piston 5 that is contained in the cylinder body 2, block body spring 10 down at base 1 be contained between the following card body piston 8 that has taper hole of following card body cylinder sleeve 7 inboards, the bottom of taper voussoir 12 is sitting on the annular boss of base 1, the upper end is by locating at the spacing ring 13 that blocks down above the body cylinder sleeve 7 by screw retention, and the conical suface of its side contacts with the cooresponding conical suface of taper hole that blocks in the body piston 8 down; The card body cylinder sleeve 14 of going up that the lower end that is positioned at main piston 5 has oil inlet B links by screw thread and last card body pair cylinder sleeve 15, be positioned at the lower end of the going up card body piston 16 Bolt Connection pine snap ring 21 that passes card body seat E of card body cylinder sleeve 14, intermediate 17 is fixed on the bottom of the secondary cylinder sleeve 15 of card body by screw thread, last card body seat F and G are fixed on the intermediate 17 by screw thread, last card body spring 22 withstands on the annular boss of card body piston 16 and last card body seat E, be fixed in the close fit mode card body piston 16 lower ends loose claw 18 the lower end just with 12 annular inclined holes of last card body seat E in support spring on steel ball corresponding, the lower end that is fixed on the loose claw 19 on the loose snap ring 21 with the same manner just with nine annular inclined holes of last card body seat F in support spring above steel ball corresponding, the loose claw 20 that is fixed on loose snap ring 21 with the same manner pass card body seat F just with nine annular inclined holes of last card body seat G in support spring above steel ball corresponding, the upper end of main spring 6 withstands on the card body seat F, and its lower end is sitting in down the upper end of card body cylinder sleeve 7.As shown in the figure, when oil inlet B is the oil return state, last card body spring 22 is pushed to card body piston 16 and is moved up, and drive loose claw 18 and loose snap ring 21 also moves up, make loose claw 18 and the loose claw 19 and 20 pressure that break away from steel ball that are fixed on the loose snap ring 21, support spring upwards push away steel ball tightly push down pilot bar, make it to be in locking state; When oil inlet B advances pressure oil, on block body piston 16 and move down and compress card body spring 22, drive loose claw 18 simultaneously, 19,20 also move down and the thrust that overcomes support spring pushes away steel ball and moves down, and make steel ball break away from pilot bar, make it to be in releasing orientation; When oil inlet C was in the oil return state, following card body spring 10 pushed card body piston 8 and moves up, and taper voussoir 12 makes taper voussoir 12 break away from pilot bar under the effect of spring wire and makes it to be in releasing orientation; When oil inlet C oil-feed, pressure oil push card body piston 8 and compression down card body spring 10 move down, promote taper voussoir 12 and make it to be locking state with pilot bar.When needs move up the lifting mode hydraulic jack, Schilling oil inlet B oil return, make the card body be in locking state, make oil inlet C oil return again, make down the card body be in releasing orientation, the 3rd step made oil inlet A oil-feed, and then pressure oil pushes away cylinder cap 3 together with cylinder body 2 and card body compression main spring 6 and moving up down, till the following end in contact of upper end of blocking the spacing ring 13 on the body down and last card body seat G; And then make oil inlet C oil-feed, make down the card body be in locking state, make oil inlet A oil return, make oil inlet B oil-feed again, make the card body be in releasing orientation, then go up the card body under the promotion of main spring 6 and promote main piston 5 and move up, until the upper end of main piston 5 with till stroke conciliation nut 4 contacts, so repeat the aforesaid operations program, the utility model lifting mode hydraulic jack will constantly upwards be creeped along pilot bar; When moving down as this lifting mode hydraulic jack of needs, at first make oil inlet A oil-feed, because of oil inlet B, C is all the oil return state, last card body and pilot bar are locking state, under to block body be releasing orientation, force down the card body to move up together with cylinder body, when on when moving about 5-10 millimeter, oil inlet A stops oil-feed, and make oil inlet C oil-feed, and make down the card body be in locking state, make oil inlet A oil return, oil inlet B oil-feed, main spring 6 promotes to go up the card body and moves up, and makes card body E, and F and G and pilot bar are in releasing orientation.Make oil inlet A oil-feed again, then pressure oil pushes away main piston 5 and moves down to push to the card body and compress main spring 6 and move down, until the lower end of last card body seat G with till spacing ring 13 on the card body down contacts, make oil inlet B oil return then, make the card body be in locking state, make oil inlet C oil return again, make down the card body be in releasing orientation, make oil inlet A oil return again, then pushing the card body under the effect of main spring 6 moves down together with cylinder body 2, with till main piston 5 contacts, so repeat the aforesaid operations program until stroke adjustment nut 4, the utility model lifting mode hydraulic jack will constantly be creeped downwards along pilot bar.

Claims

1, a kind of lifting mode hydraulic jack, be specially adapted to the Lift Part of creeping-type scaffold for building, it is by base (1), cylinder body (2), the cylinder cap (3) that has oil inlet (A), stroke is reconciled nut (4), main piston (5), main spring (6) and upward card body and card body formation down is characterized in that:

(1) the described body of card down is made up of following part: the following card body cylinder sleeve (7) that has fuel feed hole (C), its upper end links by screw thread and cylinder body (2), its lower end connects with base (1) by screw thread, the following card body piston (8) that has taper hole is located at down in the card body cylinder sleeve (7), the upper end of blocking body spring (10) down withstands on down the lower end of card body piston (8), its lower end is sitting on the base (1), the taper voussoir (12) that is the 4-7 lobe is positioned at the taper hole of card body piston (8) down, the bottom of taper voussoir (12) is sitting on the annular boss of base (1), and locate by the spacing ring (13) that is fixed on down on the card body cylinder sleeve (7) its upper end;

(2) the described card body of going up is made up of following part: have fuel feed hole (B) and in cylinder body (2), slide up and down go up card body cylinder sleeve (14) and last card body pair cylinder sleeve (15) is linked by screw thread, card body piston (16) is housed in last card body cylinder sleeve (14), intermediate (17) links by the bottom of screw thread and the secondary cylinder sleeve of last card body (15), last card body seat (E) is by the upper end of screw retention in intermediate (17), its lower end is successively by screw and last card body seat (F), (G) link, at last card body seat (E), (F) and same radius (G) be provided with several axial inclined holes, be provided with support spring and steel ball in its hole, the loose claw (18) of last card body seat (E) is fixed on the lower end of card body piston (16), last card body seat (F) and loose claw (19) (G) and (20) are fixed on the loose snap ring (21), pine snap ring (21) links by passing the bolt and the last card body piston (16) that block body seat (E), on block body spring (22) and be positioned between card body piston (16) and the last card body seat (E).

2, lifting mode hydraulic jack according to claim 1 is characterized in that being equipped with in two tangential straight holes that equal height on each side of described taper voussoir (12) and same radius place be provided with the spring wire with its bearing fit.