CN202125063U

CN202125063U - Hydraulic lifting mechanism of scaffold

Info

Publication number: CN202125063U
Application number: CN2011202115637U
Authority: CN
Inventors: 花周建; 冯冬生
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-22
Filing date: 2011-06-22
Publication date: 2012-01-25
Anticipated expiration: 2021-06-22

Abstract

The utility model relates to a hydraulic lifting mechanism of a scaffold, which comprises an iron chain, a main column, an upper transverse board, a lower transverse board, a support rod, an upper clamping claw provided with a reversing pin, a lower clamping claw provided with a reversing pin, an upper control board provided with a reversing pin sliding groove, a lower control board provided with a reversing pin sliding groove, an oil cylinder with a piston rod which is a hollow pipe, a clutch reversing pin and clutches of the upper control board and the lower control board. The oil cylinder is connected with the main column, and the piston rod of the oil cylinder penetrates through the oil cylinder and extends into an inner cavity of the main column. The upper transverse board and the lower transverse board are fixedly connected in the inner cavity of the main column, and the piston rod is connected with the lower transverse board. The upper clamping claw and the lower clamping claw are respectively hinged to the upper transverse board and the lower transverse board, the two clutches are respectively connected onto the upper transverse board and the lower transverse board in sliding mode, the upper control board and the lower control board are respectively connected with one clutch, and one sides of the sliding grooves on the control boards correspond to the reversing pins on the clamping claws. The iron chain penetrates through the inner cavity of the main column and an inner cavity of the piston rod and is respectively in pawl type one-way transmission connection with the upper clamping claw and the lower clamping claw. The hydraulic lifting mechanism of the scaffold has the advantages that climbing and falling safety is higher by adopting the pawl type one-way transmission, locking components are not easy to damage, work efficiency is high, and cost is low.

Description

A kind of scaffold hydraulicefficiency elevation structure

Technical field

The utility model relates to the scaffold lifting appliance, relates in particular to a kind of scaffold hydraulicefficiency elevation structure.

Background technology

Disclosed Chinese patent patent of invention, the patent No.: 200510040943.8, name is called: anti-falling feed-through hydraulic rises and the decline jack; A kind of feed-through hydraulic jack is provided, has utilized the mechanical self-latching performance, made hydraulic jack drive scaffold upstream or downstream on cramp bar; And the ability secure lock is on arbitrary position of cramp bar; Have only hydraulic system to open by force, just can make it to descend, have very strong fall arrest function along cramp bar.But should invent in practical implementation, and need control with the hydraulic control system of 6 oil circuits the up-down of elevating mechanism at least, hydraulic control system is complicated.The repeatedly up-down of scaffold on cramp bar simultaneously; And need be fixed on the differing heights position, retaining mechanism is to be clamped on the cramp bar through the frictional force that certain normal pressure produces in the time of fixedly, so cramp bar becomes pitted skin through clamping repeatedly; Become consumable accessory; Both increased cost, time-consuming bothersome during replacing, reduced operating efficiency again.

Summary of the invention

The purpose of the utility model is to provide a kind of non-friction locking mode and corresponding hydraulic control system a kind of scaffold hydraulicefficiency elevation structure simple in structure.

Above-mentioned purpose realizes through following technical proposals:

Said scaffold hydraulicefficiency elevation structure comprises iron chains, principal post, upper cross plate, lower cross plate, support bar, is provided with the upper clipping claw and the following claw of switching-over pin, last control panel and following control panel, the piston rod that is provided with the pin runner that commutates is the oil cylinder of hollow section and the clutch part of clutch reversing pin and said upper and lower control panel; The upper end of said oil cylinder is connected with the principal post lower end; The piston rod upper end of said oil cylinder is passed the oil cylinder upper cylinder cover and is extend into the principal post inner chamber; Said upper cross plate is fixedly connected on the upper end of principal post inner chamber, and said lower cross plate places the upper cross plate below of principal post inner chamber and is connected with piston rod through support bar; Said upper cross plate and lower cross plate comprise respectively and being parallel to each other and across a certain distance left upper tranverse plate and right upper tranverse plate and left lower tranverse plate and right lower tranverse plate mutually; Said upper clipping claw is articulated in right upper tranverse plate and left upper tranverse plate or left lower tranverse plate and right lower tranverse plate respectively with following claw; Two said clutch parts are slidingly connected to right upper tranverse plate and right lower tranverse plate or left upper tranverse plate and left lower tranverse plate respectively; Last control panel is connected with a clutch part respectively with following control panel, and said chute one side on the control panel is sold a side corresponding to the said switching-over on the claw; Said iron chains passes principal post and piston rod cavity and carries out with upper clipping claw and following claw respectively that pawl type is unidirectional to be in transmission connection.

Said scaffold hydraulicefficiency elevation structure further design is; Basically be provided with the iron chains seat on right upper tranverse plate and left upper tranverse plate or the left lower tranverse plate and the right lower tranverse plate position of a side of height such as grade corresponding to upper clipping claw and following claw; And upper clipping claw is connected with return spring respectively with following claw corresponding position; Said iron chains is clamped between upper and lower claw and the corresponding iron chains seat, to realize unidirectional being in transmission connection of said pawl type between iron chains and the upper and lower claw.

Said scaffold hydraulicefficiency elevation structure further design is; Said upper clipping claw is hinged on respectively on right upper tranverse plate and the left upper tranverse plate with following claw; On left lower tranverse plate and the right lower tranverse plate, be respectively equipped with sliding pin, said clutch part is provided with guide; Clutch part is set on the sliding pin through guide, sliding pin and the corresponding axial location of guide be provided with two radially be used to peg graft the pin-and-hole of alignment pin.

Said scaffold hydraulicefficiency elevation structure further design is; Said clutch part comprises clutch wallboard, following clutch wallboard and clutch top board; Said upper and lower clutch wallboard is vertically connected on respectively on the upper and lower end face of clutch top board; Form the semi-surrounding structure of a rectangle; Said right transverse slat or left lower tranverse plate place this semi-surrounding structure, and the clutch top board is provided with and the corresponding hole of said guide endoporus, and guide is connected on the position of one side corresponding to this hole, the outside with respect to said semi-surrounding structure.

Said scaffold hydraulicefficiency elevation structure further design is; Said upward control panel or following control panel comprise control panel body, tongue and contain inserting of inclined-plane; Said control panel body be provided with by wide with narrow the second L-shaped depth recess of forming, be provided with first depth recess of rectangle in next-door neighbour said wide of second depth recess and narrow one side, tongue is inclined in first depth recess; The high-end bottom surface that exceeds second depth recess of tongue; And form first chute with second depth recess, one side, and the corresponding side with second depth recess of the low side of tongue forms second chute, and said inserting places first depth recess; Said inclined-plane on this is inserted connects first chute and second chute, forms said switching-over pin runner.

Said scaffold hydraulicefficiency elevation structure further design is; The said piston rod partial fixing that extend into the principal post inner chamber is connected and connects on the transverse slat; Said support bar one end is connected with right lower tranverse plate with said left lower tranverse plate, and an end is connected with piston rod through connecting transverse slat.

The unidirectional transmission of pawl type that the passing through of the utility model is provided with claw and the iron chains of switching-over pin realize the scaffold elevating mechanism on iron chains climb or decline or safety locking at a certain height and position, make the reliability of safe locking higher.Because be non-friction lock, corresponding locking element is not fragile, can significantly reduce the time of changing consumable accessory, thereby increase work efficiency.The utility model utilizes a hollow pipe to be used as the piston rod of oil cylinder simultaneously; And be used control panel and the clutch reversing pin cooperates the up-down of controlling elevating mechanism with the clutch part of control panel; Make cylinder structure simple; And only need make piston two oil circuits that move simply up or down, make corresponding hydraulic control system simple, thereby can reduce the cost of scaffold hydraulicefficiency elevation structure largely.

Description of drawings

Fig. 1 is the structural representation of the scaffold hydraulicefficiency elevation structure of the utility model.

Fig. 2 is that the A of elevating mechanism shown in Figure 2 is to view.

Fig. 3 is the three-dimensional structure sketch map of upper and lower control panel.

Fig. 4 is the sectional view of the N-N position of control panel shown in Figure 3.

Fig. 5 is the sectional view of the M-M position of control panel shown in Figure 3.

Fig. 6 is that the P of control panel shown in Figure 3 is to view.

Fig. 7 is that upper and lower control panel moves laterally, and switching-over pin runner it on is thrown off and cooperating of commutating and sell.

Fig. 8 is the situation that piston rod moves up in the elevating mechanism.

Fig. 9 is the situation that elevating mechanism moves up along iron chains through upper clipping claw.

Figure 10 is an elevating mechanism through upper clipping claw along the move up situation of a stroke of iron chains.

Figure 11 is that elevating mechanism begins to recover reset condition, the situation of upper clipping claw and iron chains interlock.

Figure 12 is that upper and lower control panel moves to the inside, and the pin runner that commutates on it is matched with the switching-over pin.

Figure 13 is the trajectory diagram of switching-over pin on last control panel on the upper clipping claw.

Figure 14 is the trajectory diagram of switching-over pin on following control panel on the following claw.

Figure 15 is the situation that piston rod begins to move down in the elevating mechanism.

Figure 16 is the situation that piston rod moves down process in the elevating mechanism.

Figure 17 is the situation that piston rod moves down a stroke in the elevating mechanism.

Figure 18 is the situation that the relative piston rod of principal post moves down in the elevating mechanism.

Among the figure, the 1-piston rod, cylinder cap under the 2-, the 3-oil cylinder, the 4-piston head, the 6-upper cylinder cover, the 7-cylinder pedestal, 10-connects transverse slat; The 11-support bar, 12-principal post, claw under the 13-, 14-upper clipping claw, the last control panel of 15-, 17-iron chains seat, 20-right lower tranverse plate; 21 guidees, 22-sliding pin, 23-junction plate, up-down control panel assembly under the 25-, the 26-pin that commutates, the last clutch plate wallboard of 27-, 28-clutch plate top board; The 30-alignment pin, 29-guide, 31-latch, 32-right upper tranverse plate, the last clutch wallboard of 33-, 34-left upper tranverse plate, control panel under the 35-; Clutch wallboard under the 36-, the 37-left lower tranverse plate, clutch wallboard under the 38-, 39-connects transverse slat, 40-control panel body, 41-inserts, the 42-tongue; The 45-spring, 50-iron chains, 401-first depth recess, 402 second depth recess, the wide portion of 402a-, the narrow portion of 402b-, 403 first chutes; Second chute 404,411-inserts,

The specific embodiment,

Map 1, scaffold hydraulicefficiency elevation structure mainly by iron chains 50, principal post 12, upper cross plate 34 (32), lower cross plate 20 (37), support bar 11, connect transverse slat 10, upper clipping claw 14, down claw 13, go up control panel 15, control panel 35, oil cylinder 3 and clutch part are formed down.The upper end of oil cylinder 3 is connected with the lower end of principal post 12 through cylinder pedestal 7; The piston rod 1 of oil cylinder 3 is a hollow section; This piston rod 1 passes whole cylinder body, that is: the inner chamber that passes down cylinder cap 2, cylinder body piston head 4 and upper cylinder cover 6 and extend into principal post 12 is fixedly connected on and connects transverse slat 10.Upper cross plate (left upper tranverse plate 34 and right upper tranverse plate 32) is fixedly connected on the upper end of principal post 12 inner chambers, and lower cross plate (left upper tranverse plate 37 and right lower tranverse plate 20) places the upper cross plate below of principal post inner chamber.Upper cross plate and lower cross plate comprise respectively and being parallel to each other and across a certain distance two transverse slats, that is: right upper tranverse plate 32 and left upper tranverse plate 34 mutually; Right lower tranverse plate 20 and left lower tranverse plate 37 see also Fig. 2.Right lower tranverse plate 20 be connected transverse slat 10 and connect by support bar 11.The connection transverse slat 10 that moves through of piston rod 1 passes to right lower tranverse plate 20 with support bar 11.Be respectively equipped with switching-over pin 26 on upper clipping claw 14 and the following claw 13.The upper end of upper clipping claw 14 and following claw 13 is hinged on respectively on left upper tranverse plate 34 and the right lower tranverse plate 20, and its corresponding end portion connects an end of extension spring 45, and the other end of this spring is separately fixed on corresponding left upper tranverse plate 34 and the right lower tranverse plate 20.Like this when upper clipping claw 14 and following claw 13 towards spring 45 draw directions when pin joint rotates, just possessed the energy of return.On corresponding to the left upper tranverse plate 34 of a side of upper clipping claw 14 and following claw 13 basic height such as grade and right lower tranverse plate 20 positions, be provided with iron chains seat 17,19.Iron chains 50 passes the inner chamber of principal post 12 and piston rod 1 and is clamped between upper and lower claw and the corresponding iron chains seat, can realize unidirectional being in transmission connection of pawl type between iron chains and the upper and lower claw.

Map 2 is slidingly connected at through this pin respectively on right upper tranverse plate 32 and the left lower tranverse plate 37 at alignment pin 30, two clutch parts that spin through screw thread respectively on right upper tranverse plate 32 and the left lower tranverse plate 37.Clutch part is mainly by last clutch wallboard 33 (36), clutch wallboard 27 (38), clutch top board 28 and guide 29 are formed down; Upper and lower clutch wallboard is vertically connected on respectively on the upper and lower end face of clutch top board; Form the semi-surrounding structure of a rectangle; Right upper tranverse plate 32 or left lower tranverse plate 37 place this semi-surrounding structure; Clutch top board 28 is provided with and the corresponding hole of guide endoporus, on the position of one side corresponding to this hole, the outside that guide 29 connects with respect to said semi-surrounding structure, makes guide 29 be socketed on the alignment pin 30.On alignment pin 30, be respectively equipped with the pin-and-hole of two and one latches 31 that are used to peg graft with the radial position of the correspondence of guide 29.When alignment pin 30 moves,, produce " leave " of clutch part and two axial locations (like Fig. 7 and shown in Figure 12) of " closing " at clutch part through cooperating of one of two pin-and-holes on the pin-and-hole on the guide 29 and the alignment pin 30.

Last control panel 15 and following control panel 35 respectively be slidingly connected at right upper tranverse plate 32 and be connected with clutch part on the left lower tranverse plate 37.Because of last control panel 15, control panel 35 is longer relatively down; For clutch part drive control panel 15 or following control panel 35 are slided steadily; Be connected junction plate 23 respectively in the lower end of control panel 15 and the upper end of following control panel 35; Respectively through the screw thread line sliding pin 22 that spins, junction plate 23 1 sides connect guide 21 on the right lower tranverse plate of correspondence 20 and left upper tranverse plate 34, and junction plate 22 is connected on the sliding pin 22 through guide 21 slip caps.

Map 3～6; Last control panel 15 and following control panel 35 are main by control panel body 40, tongue 42 with contain inserting of inclined-

plane

411 and 41 form; Said control panel body is provided with by wide 402a and narrow the second L-shaped depth recess 402 that 402b forms, and is provided with first depth recess 401 of rectangle in wide 402a of next-door neighbour's second depth recess 402 and narrow 402b one side, and tongue 42 is inclined in first depth recess 401; The high-end bottom surface that exceeds second depth recess of tongue 42; And form first chute 403 with second depth recess, one side, and the corresponding side with second depth recess of the low side of tongue forms second chute 404, and said inserting 41 places first depth recess 401; Inclined-plane 411 on this is inserted connects first chute 403 and second chute 404, forms said switching-over pin runner.

During the work of the utility model hoist, scaffold is connected with the piston rod 1 of oil cylinder, and the iron chains upper end is fixed on the beam of encorbelmenting and is set in the hoist, and working condition is divided two kinds of rise and fall, explains respectively below.

Uphill process:

During rising, the pulling clutch part moves control panel 15 and following control panel 35 respectively laterally along alignment pin 30, and the pin-and-hole on the guide 29 cooperates with alignment pin 30 outsides pin, and latch 31 is inserted in the hole of this cooperation.At this moment, last control panel 15 is thrown off with switching-over pin 26 with the switching-over pin runner on the following control panel 35 and is cooperated, like Fig. 7.

Rising begins, the oil-feed of following cylinder cap oilhole, and the oil return of upper cylinder cover oilhole, piston rod is moved upward to the top, like Fig. 8.Then, upper cylinder cover 6 oilhole oil-feeds, the oil return of following cylinder cap oilhole; Piston rod 1 produces relative motion with cylinder pedestal 7, and upper clipping claw 14 is fixed as one with principal post 12, and following claw 13 is fixed as one with piston rod 1; Because of iron chains is fixed; Following claw 13 and piston rod 1 move down with respect to iron chains, and this is claw and iron chains 50 interlocks at present, and the gravity of hoist is by descending claw 13 to bear.Both do not have relative motion after following claw 13 and iron chains 50 interlocks, and when claw 13 together moved with piston rod 1 instantly, master cylinder 3 moved up with respect to iron chains 50.The active force that this moment, upper clipping claw 14 overcame extension spring 45 moves up along iron chains, sees also Fig. 9.Subsequently, the upper cylinder cover oilhole continues oil-feed, and following cylinder cap oilhole continues oil return, and this is claw and iron chains interlock at present.When claw 13 together moved with piston rod 1 instantly, master cylinder 3 moved upward with respect to iron chains 50.The active force that this moment, upper clipping claw 14 overcame extension spring 45 moves up along iron chains.When piston rod 1 moved to cylinder bottom portion, master cylinder 3 (being hoist) had been accomplished a upward stroke, referring to Figure 10.After this, the oil-feed of following cylinder cap oilhole, the oil return of upper cylinder cover oilhole, when piston rod 1 moves upward slight distance, upper clipping claw 14 and iron chains 50 interlocks, the gravity of hoist is born by upper clipping claw 14, sees Figure 11.At last, following cylinder cap oilhole continues oil-feed, and the upper cylinder cover oilhole continues oil return, makes piston rod 1 and following claw 13 continue to move upward, and gets back to initial state as shown in Figure 8.

The decline process:

During decline, the pulling clutch part moves control panel 15 and following control panel 35 respectively to the inside along alignment pin 30, and the pin-and-hole on the guide 29 cooperates with alignment pin 30 the inside pin-and-holes, and latch 31 is inserted in the hole of this cooperation.At this moment, last control panel 15 is sold 26 with the switching-over pin runner on the following control panel 35 with switching-over and is cooperated, like Figure 12.

When descending beginning, the switching-over pin 26 on upper clipping claw 14 and the following claw 13 is controlled by control panel 15 and the switching-over pin runner on the following control panel 35 respectively, and its switching-over pin 26 sees also Figure 13,14 along the track that belongs to switching-over pin runner walking on the control panel.

A1 to A2 position among Figure 13,14, the sliding pin 26 on the upper clipping claw 14 moves to inclined-plane 411 directions of inserting on second chute 404 of tongue low side, and sliding pin 26 is by the constraint of tongue, upper clipping claw 14 and iron chains 50 interlocks; Switching-over pin 26 on the following claw 13 moves to end one side (A2 position) of tongue by the end position of first chute 403, and moving process switching-over pin is by tongue 42 constraints, and against the tongue outside, following claw begins to leave iron chains.At this moment, the oil return of following cylinder cap oilhole, the oil-feed of upper cylinder cover oilhole, piston rod begins to move downward from the top, referring to Figure 15,16.

A2 to A3 position among Figure 13,14, the sliding pin 26 on the upper clipping claw 14 moves to first chute 403 along the inclined-plane 411 of inserting, and this process sliding pin 26 moves to high-end by the low side of tongue 42; Switching-over pin 26 on the following claw 13 moves to tongue one end and gets into second chute 404 along the side right-angle steering of this end of tongue from the end of first chute 403, the switching-over pin is not by the constraint of tongue.At this moment, piston rod is moved downward to the bottom, and for scaffold moves downward ready work, upper clipping claw 14 leaves iron chains 50 gradually, and following claw 13 and iron chains 50 interlocks are referring to Figure 17.

A3 to A4 among the figure is until the A5 position, and the sliding pin 26 on the upper clipping claw 14 arrives tongue one end (position of A5) along end (position of A4) the back counter motion that first chute 403 moves to this chute; Switching-over pin 26 on the following claw 13 moves to end (position of A4) the back counter motion of second chute 404 to 411 ends, inclined-plane (position of A5) of inserting.At this moment, upper clipping claw 14 is separated from iron chains fully, following claw and iron chains 50 interlocks; The oil-feed of following cylinder cap oilhole, the oil return of upper cylinder cover oilhole, piston rod is attempted to move up; But following claw is in being snapped at iron chains 50 and can not move, and then principal post 12 and oil cylinder move downward with respect to iron chains, referring to Figure 18.

A5 to A6 among the figure is until the A7 position, and the sliding pin 26 on the upper clipping claw 14 gets into second chute 404 along the side right-angle steering of the above-mentioned end of tongue, and along this runner movement to end (position of A7), upper clipping claw 14 gradually near iron chains 50 until with its interlock; Switching-over pin 26 on the following claw 13 moves to first chute 403 along the inclined-plane 411 of inserting, and moves to the end (position of A7) of this chute along first chute 403, and following claw 13 leaves iron chains 50 gradually, until breaking away from iron chains 50 fully.At this moment, principal post 12 and oil cylinder move downward a stroke with respect to iron chains, to position, piston rod relative principal post 12 the top, get back to position shown in Figure 15.

Claims

1. scaffold hydraulicefficiency elevation structure is characterized in that comprising iron chains, principal post, upper cross plate, lower cross plate, support bar, is provided with the upper clipping claw and the following claw of switching-over pin, last control panel and following control panel, the piston rod that is provided with the pin runner that commutates is the oil cylinder of hollow section and the clutch part of clutch reversing pin and said upper and lower control panel; The upper end of said oil cylinder is connected with the principal post lower end; The piston rod upper end of said oil cylinder is passed the oil cylinder upper cylinder cover and is extend into the principal post inner chamber; Said upper cross plate is fixedly connected on the upper end of principal post inner chamber, and said lower cross plate places the upper cross plate below of principal post inner chamber and is connected with piston rod through support bar; Said upper cross plate and lower cross plate comprise respectively and being parallel to each other and across a certain distance left upper tranverse plate and right upper tranverse plate and left lower tranverse plate and right lower tranverse plate mutually; Said upper clipping claw is articulated in right upper tranverse plate and left lower tranverse plate or left upper tranverse plate and right lower tranverse plate respectively with following claw; Two said clutch parts are slidingly connected to right upper tranverse plate and right lower tranverse plate or left upper tranverse plate and left lower tranverse plate respectively; Last control panel is connected with a clutch part respectively with following control panel, and said chute one side on the control panel is sold a side corresponding to the said switching-over on the claw; Said iron chains passes principal post and piston rod cavity and carries out with upper clipping claw and following claw respectively that pawl type is unidirectional to be in transmission connection.

2. a kind of scaffold hydraulicefficiency elevation structure according to claim 1; It is characterized in that being provided with the iron chains seat on right upper tranverse plate and left lower tranverse plate or the left upper tranverse plate and the right lower tranverse plate position of a side of height such as grade basically corresponding to upper clipping claw and following claw; And upper clipping claw is connected with return spring respectively with following claw corresponding position; Said iron chains is clamped between upper and lower claw and the corresponding iron chains seat, to realize unidirectional being in transmission connection of said pawl type between iron chains and the upper and lower claw.

3. a kind of scaffold hydraulicefficiency elevation structure according to claim 2; It is characterized in that said upper clipping claw and following claw are hinged on respectively on right upper tranverse plate and the left lower tranverse plate; Be respectively equipped with sliding pin on left upper tranverse plate and the right lower tranverse plate; Said clutch part is provided with guide, and clutch part is set on the sliding pin through guide, sliding pin and the corresponding axial location of guide be provided with two radially be used to peg graft the pin-and-hole of alignment pin.

4. a kind of scaffold hydraulicefficiency elevation structure according to claim 3; It is characterized in that said clutch part comprises clutch wallboard, following clutch wallboard and clutch top board; Said upper and lower clutch wallboard is vertically connected on respectively on the upper and lower end face of clutch top board; Form the semi-surrounding structure of a rectangle; Said right transverse slat or left lower tranverse plate place this semi-surrounding structure, and the clutch top board is provided with and the corresponding hole of said guide endoporus, and guide is connected on the position of one side corresponding to this hole, the outside with respect to said semi-surrounding structure.

5. a kind of scaffold hydraulicefficiency elevation structure according to claim 1; It is characterized in that said upward control panel or following control panel comprise control panel body, tongue and contain inserting of inclined-plane; Said control panel body be provided with by wide with narrow the second L-shaped depth recess of forming, be provided with first depth recess of rectangle in next-door neighbour said wide of second depth recess and narrow one side, tongue is inclined in first depth recess; The high-end bottom surface that exceeds second depth recess of tongue; And form first chute with second depth recess, one side, and the corresponding side with second depth recess of the low side of tongue forms second chute, and said inserting places first depth recess; Said inclined-plane on this is inserted connects first chute and second chute, forms said switching-over pin runner.

6. a kind of scaffold hydraulicefficiency elevation structure according to claim 1; It is characterized in that the said piston rod partial fixing that extend into the principal post inner chamber is connected on the connection transverse slat; Said support bar one end is connected with right lower tranverse plate with said left sheer pole, and an end is connected with piston rod through connecting transverse slat.