CN100497082C

CN100497082C - Integral full gyration lift type steering oar device

Info

Publication number: CN100497082C
Application number: CNB200710307518XA
Authority: CN
Inventors: 许惠民
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-27
Filing date: 2007-12-27
Publication date: 2009-06-10
Anticipated expiration: 2027-12-27
Also published as: CN101195410A

Abstract

The invention relates to an integrally full-revolving and lifting rudder paddle device, including a power actuating mechanism, a rotation control mechanism, a lifting mechanism and a lift type supporting mechanism which engages with the lifting mechanism. The invention is characterized in that the lift type supporting mechanism is a thrust stand composed of sleeves, a stempost, a lifting slide bar, a connection board and a thrust plate, the sleeves are arranged on both sides of the propeller screw and the U-typed groove on the stem in two groups, the upper end of the sleeves is fixed with the stem and the lower end is fixed with the stempost, two groups of lifting slide bars penetrate the two groups of sleeves, the upper end is detachably connected with lift platform via a connection plate, the lower end is connected with the thrust plate. The power actuating mechanism penetrates the U-typed groove of the stem, a supporting axis arranged at the lower end of the power actuating mechanism is rotationally connected with the thrust plate and the whole propeller screw can rotate with a degree of 360 DEG in the thrust stand. The rudder paddle device has the advantages that the propeller screw can rotate with a degree of 360 DEG, the lift range of the propeller screw is large and the ship needs no ballasting when navigating with no load.

Description

Integral full turning lift type steering oar device

Technical field

The present invention relates to a kind of inland navigation craft engine installation, the liftable rudder oar of particularly a kind of whole full circle swinging device.

Background technology

Chinese patent ZL200520039691.2 discloses a kind of whole rotary and lifting formula rudder oar device, this rudder oar device is mainly by the lifting table that is contained in the ship stern, hydraulic ram, frame, gear case up and down, screw propeller, adapter sleeve, main frame, compositions such as swing type mechanism, whole rudder oar device respectively is less than or equal to the revolution of 90 degree about can wholely doing under the driving of swing type mechanism, can also move up and down with lifting table simultaneously, though the rudder oar device of this structure has solved the not high and caused additional moment problem of single-cantilever structure of Z type propelling unit driving efficiency, but because the pivot shaft on its lower tooth roller box directly is inserted in the bearing hole of boats and ships sternpost, the range of screw propeller is restricted (general maximum lifting value has only 1/3rd of diameter of propeller blade, often still needs ballast when ship in ballast is navigated by water) on the one hand; On the other hand when screw propeller when low level moves, because stopping of boats and ships sternpost, about the degreeof turn of blade can only be limited to each 90 the degree scopes in, upper gear box must be established the needs that reversing gear could satisfy the various operating conditions of boats and ships, and when reversing engine installation propulsion coefficient far away from positive Che Shilaidegao.

Summary of the invention

Technical matters to be solved by this invention is: overcome the deficiency of existing whole rotary and lifting formula rudder oar device, provide a kind of can 360 degree full circle swingings, do not need the novel inland river marine rudder oar device of ballast during big, the ship in ballast navigation of screw-propeller lifting scope.

In order to solve the problems of the technologies described above, the present invention is by the following technical solutions: a kind of integral full turning lift type steering oar device, it comprises a Power train that drives the screw propeller rotation, maneuvering propeller and the rotating revolution steering unit of Power train thereof, one drives the revolution steering unit, Power train, the lifting mechanism of screw-propeller lifting, and lifting mode supporting mechanism that matches with lifting mechanism, described revolution steering unit is provided with the rotating together rotary supporting device of a supporting Power train, described lifting mechanism has a lifting table, it is characterized in that: described lifting mode supporting mechanism is by sleeve, sternpost, the lifting slide bar, connecting panel, the thrust frame that thrust plate is formed, sleeve divides two to be mounted on the U type groove that the ship stern offers and the both sides of screw propeller, its upper end is fixed with the ship stern, lower end and sternpost are fixed, two groups of lifting slide bars pass two groups of sleeves, its upper end is connected by connecting panel and lifting table are removable, the lower end is connected with thrust plate, Power train passes ship stern U type groove, one pivot shaft and the thrust plate of its underpart are rotationally connected, and described screw propeller integral body can 360 degree full circle swingings in thrust frame.

In order to solve the problems of the technologies described above, the present invention adopts following further technical scheme:

Described revolution steering unit is a back operator's compartment revolution steering unit, divide and just navigating and falling boat revolution steering unit, the described revolution steering unit that just navigating drives the hinge wheel that just navigating by the steering wheel that just navigates, the hinge wheel that just navigating drives the minor sprocket that just navigating by messenger chain, the minor sprocket that just navigating passes through worm shaft successively, the worm and gear gear case, rotary drive shaft, the revolution driven wheel, the driving rotational bearing set, the boat revolution steering unit that falls drives the hinge wheel that navigates by the steering wheel that navigates, the hinge wheel that navigates drives the minor sprocket that navigates by messenger chain, the minor sprocket that navigates passes through worm shaft successively, the worm and gear gear case, rotary drive shaft, the revolution driven wheel, the driving rotational bearing set.

Described revolution steering unit is a front and back major-minor operator's compartment revolution steering unit, preceding operator's compartment revolution steering unit is the revolution steering unit that just navigating, back operator's compartment revolution steering unit is the steering unit that navigates, the described revolution steering unit that just navigating, the steering unit that navigates drive HM Hydraulic Motor by just the navigate steering wheel or the steering wheel that navigates by oil pump and hydraulic circuit thereof, and then drive revolution driven wheel, revolution driving gear drives rotary supporting device, described revolution steering unit and the steering unit that navigates of just navigating just navigated and the switching of falling to navigate by control cock control.

Described Power train is made up of main frame, power-transfer clutch, upper gear box, adapter sleeve, tween drive spindle, lower tooth roller box, main frame is connected with an end of power-transfer clutch by flywheel, the other end of power-transfer clutch links to each other with the input shaft of upper gear box, upper gear box is connected in aggregates with the lower tooth roller box by an adapter sleeve that passes rotary supporting device inner ring, ship stern U type groove, be positioned at the tween drive spindle of adapter sleeve, its upper end links to each other with the upper gear box output shaft, the lower end links to each other with lower tooth roller box input shaft, and the lower tooth roller box drives the screw propeller rotation.

Described gear case up and down respectively is provided with a pair of intermeshing finishing bevel gear cuter respectively.

Described rotary supporting device is installed on the lifting table, and it is provided with the single-revolution circle, which is provided with a frame that main frame, power-transfer clutch, upper gear box are installed, and the outside of turning circle is provided with and turns round the driven wheel gears in mesh.

The cross section of described adapter sleeve is streamline contour.

The lifting table of described lifting mechanism has the fence type crane, and crane is provided with hydraulic ram, and the ship stern is provided with pillar stiffener, and pillar stiffener passes the sliding sleeve of being located on the lifting table, and lifting table can be moved up and down.

The present invention compared with prior art has following beneficial effect:

1. maneuvering performance is extremely superior, and whole device can be done 360 degree revolutions, the conventional boats and ships of ratio of cornering radius of boats and ships is significantly reduced and can pivot turn.

2. offered U type groove at the ship stern, under the driving of lifting mechanism, screw propeller can pass this U type groove and be raised on the deck, brings great convenience to the repairing of parts such as screw propeller especially repairing work like this.

3. compare with Z type propelling unit, the main frame power of integral full turning lift type steering oar device directly is connected with upper gear box by power-transfer clutch, and the centre has cut universal drive shaft, and main frame improves machinery driving efficiency together with the whole revolution of rudder oar device.

4. be provided with the lifting mode bracing or strutting arrangement, the thrust that screw propeller is sent passes to hull by this device, has improved the force-bearing situation that propeller thrust is transmitted.

5. maneuvering system is controlled respectively by two covering devices that just navigate and navigate, the boats and ships bigger to length are provided with head, two operator'ies compartment of tail are controlled respectively, the driving sight of just navigating of boats and ships all is guaranteed, and the propulsion coefficient of rudder oar device does not reduce yet when navigating, like this when boats and ships run into the width deficiency and can't reverse end for end situation in excavated basin or branch line navigation channel, a segment distance is sailed in the navigation of can falling earlier, by the time drive to bifurcated leg or channel span and reverse end for end operation when enough again, thereby solved the big boats and ships of length and in narrow fairway, reversed end for end problem of difficult, improved the navigability of boats and ships greatly.

6. matching by lifting mechanism and lifting mode supporting mechanism, can adjust the draft of screw propeller according to the variation of drauht up and down, when ship in ballast, propeller blade tip can be lower than the degree of depth of hull bottom and reach the submergence value of regulation, also can normally navigate by water without ballast when making ship in ballast, thereby increased the cabin cargo space on the one hand, saved the expense of boats and ships configuration ballasting system, the hull resistance when also having reduced unloaded the navigation on the other hand.

Description of drawings

Fig. 1 is that cell-type rudder oar apparatus structure scheme drawing is driven in the back;

Fig. 2 is the longitudinal sectional view of adapter sleeve structure;

Fig. 3 is the birds-eye view of adapter sleeve structure;

Fig. 4 is the longitudinal sectional view of lower gear box structure;

Fig. 5 is the birds-eye view of lower gear box structure;

Fig. 6 is the longitudinal sectional view of lower tooth roller box bottom cover structure;

Fig. 7 is the birds-eye view of lower tooth roller box bottom cover structure;

Fig. 8 drives cell-type rudder oar apparatus structure scheme drawing for the front and back major-minor;

Fig. 9 is a support system structure stern direction projection scheme drawing;

Figure 10 is the jacking system structural perspective;

Figure 11 is a ship stern U type groove scheme drawing.

1. upper gear box among the figure, 2. power-transfer clutch, 3. main frame, 4. frame, 5. hydraulic ram, 6. lifting table, 7. pillar stiffener, 8. Upper shaft sleeve, 9. Lower shaft sleeve, 10. fence type crane, 11. ship stern, 12. adapter sleeve, 13. intermediate connecting shaft, 14. screw propeller, 15. end shaft sealed set, 16. lower tooth roller box, 17. lower tooth roller box bottom, 18. thrust plate, 19. sternpost, 20. worm and gear gear case, 21. worm shaft, the minor sprocket 22. navigate, the minor sprocket 23. just navigating, the driving chain 24. just navigating, the hinge wheel 25. just navigating, the steering wheel 26. just navigating, the steering wheel 27. navigate, the hinge wheel 28. navigate, the driving chain 29. navigate, 30. revolution driven wheel, 31. rotary drive shaft, 32. rotary supporting device, 33. connecting panel, 34. HM Hydraulic Motor, 35. the boat of falling drives oil pump, 36. turnover two-way oil pipe, the switching control valve 37. just navigating, 38. turnover two-way oil pipe, 39. lifting slide bar, 40. vertical sleeve, 41. rubber tube, 42. turnover two-way oil pipe, the driving oil pump 43. just navigating, 44. pivot shaft, 45. turning circle, A. gear, B. go up finishing bevel gear cuter, C. descend finishing bevel gear cuter, D. ship stern U type groove.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples:

The present invention is the improvement of Chinese patent ZL 200520039691.2, it mainly comprises a Power train that drives the screw propeller rotation, maneuvering propeller and the rotating revolution steering unit of Power train thereof, a lifting mechanism that drives revolution steering unit, Power train, screw-propeller lifting, and a lifting mode supporting mechanism that matches with lifting mechanism.

The Power train (see figure 1) is made up of main frame 3, power-transfer clutch 2, upper gear box 1, tween drive spindle 13 and adapter sleeve 12, lower tooth roller box 16, end shaft sealed set 15, lower tooth roller box bottom 17, screw propeller 14.An independent clutch 2 is arranged between main frame 3 and the upper gear box 1, main frame 3 is connected with an end of power-transfer clutch 2 by flywheel, the other end of power-transfer clutch 2 links to each other with the input shaft of upper gear box 1, upper gear box 1 is connected in aggregates with lower tooth roller box 16 by adapter sleeve 12, be positioned at the tween drive spindle 13 of adapter sleeve 12, its upper end links to each other with upper gear box 1 output shaft, and the lower end links to each other with lower tooth roller box 16 input shafts, and lower tooth roller box 16 drives screw propeller 14 rotations.A pair of intermeshing finishing bevel gear cuter B and C are set respectively in the upper and lower gear case, for reducing the resistance of rudder oar device lower apron, the cross sectional shape of adapter sleeve 12 is done streamlining (seeing Fig. 2, Fig. 3), and the shape of lower gear casing 16 is horizontally on the basis of streamlined cross-section to connect a cylindrical tube, and an end of cylindrical shell is with sphere end socket (seeing Fig. 4, Fig. 5).The two ends of tween drive spindle 13 all have universal joint cross, and the universal-joint fixation fork of one end and the spindle nose of wounded in the battle key are made of one.Lower tooth roller box bottom 17 centers are provided with pivot shaft 44 (seeing Fig. 6, Fig. 7), and the both sides of this pivot shaft 44 are provided with reinforced rib to strengthen being subjected to the rigidity of force direction.

Lifting mechanism (seeing Fig. 1 and Figure 10) is made up of lifting table 6, fence type crane 10, hydraulic ram 5, Upper shaft sleeve 8, Lower shaft sleeve 9.Upper shaft sleeve 8 and Lower shaft sleeve 9 are socketed in first, second root cross bar middle part of fence type crane 10 1 sides respectively, and the two ends of two cross bars are hinged with lifting table 6 and ship stern respectively about this side, and a relative side respectively is equipped with a pulley in the two ends of two cross bars up and down.The plunger of hydraulic ram 5 is flexible just can to make fence type crane 10 move up and down, and then drive lifting table 6 and whole rudder oar device is done oscilaltion, at four vertical pillar stiffeners 7 of ship stern 11 welding, it passes the sliding sleeve that is positioned at correspondence position on the lifting table 6 can move up and down lifting table 6, and the part of horizontal thrust that screw propeller is produced is passed to hull simultaneously.The middle part of lifting table 6 is provided with single-revolution bearing set 32, it is provided with single-revolution circle 45, and frame 4 is installed on the turning circle 45, and upper gear box 1 and main frame 3 are installed on the frame 4, a power-transfer clutch 2 is arranged between upper gear box 1 and main frame 3, and adapter sleeve 12 passes rotary supporting device 32 inner rings.

The revolution steering unit is divided into back operator's compartment and two kinds of forms of front and back major-minor operator's compartment:

What reflect among Fig. 1 is back operator's compartment revolution steering unit, divide and just navigating and falling boat revolution steering unit, the revolution steering unit that just navigating drives the hinge wheel 25 that just navigating by the steering wheel 26 that just navigates, the hinge wheel 25 that just navigating drives the minor sprocket 23 that just navigating by messenger chain 24, just navigating minor sprocket 23 successively by worm shaft 21, worm and gear gear case 20, rotary drive shaft 31, revolution driven wheel 30, driving rotational bearing set 32, the boat revolution steering unit that falls drives the hinge wheel 28 that navigates by the steering wheel 27 that navigates, the hinge wheel 28 that navigates drives the minor sprocket 22 that navigates by messenger chain 29, navigate minor sprocket 22 successively by worm shaft 21, worm and gear gear case 20, rotary drive shaft 31, revolution driven wheel 30, driving rotational bearing set 32, wherein rotary supporting device 32 is provided with turning circle 45, and the outside has gear A and 30 engagements of revolution driven wheel on the turning circle 45.

Front and back major-minor operator's compartment revolution steering unit is seen Fig. 8, the revolution steering unit of this form has former and later two operator'ies compartment just navigating respectively to handle and falls boat to be handled, preceding operator's compartment revolution steering unit is the revolution steering unit that just navigating, back operator's compartment revolution steering unit is the steering unit that navigates, the revolution steering unit that just navigating drives oil pump 43 by the steering wheel 26 that just navigates by just navigating, the boat revolution steering unit that falls passes through by the steering wheel 27 that navigates, and boat drives oil pump 35 and turnover two-way oil pipe 36,38,42 and two road rubber tubes 41 drive HM Hydraulic Motor 34, and then drive revolution driven wheel 30, revolution driven wheel 30 driving rotational bearing sets 32, just navigating the revolution steering unit and the steering unit that navigates are just being navigated and the switching of boat by a control cock 37 controls.This rudder oar device is controlled by the just boat steering wheel of preceding operator's compartment when just navigating, then control when navigating by the steering wheel that navigates of back operator's compartment, the boat of just navigating and falling is controlled and can only be selected the one road and carry out normal operation by the switching control valve of just navigating, in addition, need to install wired through call between the operator's compartment of front and back, so that before and after coordinating, handle, get final product and only need when normally navigating by water to handle at preceding operator's compartment by slipping from alongside, when falling boat and the navigation of dangerous leg.Whole revolution steering unit can be arranged on the lifting table 6, can be with the oscilaltion of lifting table 6, and the driving compartment ceiling is made detachable, repairs with the integral hoisting that makes things convenient for main frame.

Lifting mode supporting mechanism (seeing Fig. 8, Fig. 9 and Figure 11) is made up of vertical sleeve 40, sternpost 19, lifting slide bar 39, thrust plate 18 and connecting panel 33, be distributed in the U type groove D that the ship stern offers, four or the top and the welding of ship stern of six roots of sensation vertical sleeve 40 of screw propeller 14 2 sides, its underpart and sternpost are welded into one, and form a thrust frame.And lifting slide bar 39 passes sleeve 40, its lower end is connected with thrust plate 18, the upper end joins with connecting panel 33, connecting panel 33 usefulness bolts and 6 removable connections of lifting table, thrust plate 18 centers are provided with a bearing hole, the adapter sleeve 12 of Power train passes rotary supporting device 32 inner rings, and U type groove D, pivot shaft 44 on the lower tooth roller box bottom 17 of its lower end is inserted in this bearing hole, pivot shaft 44 and thrust plate 18 are rotationally connected, the line of centers of this bearing hole needs to overlap with the center of gyration line of rotary supporting device 32, and screw propeller integral body can 360 degree full circle swingings in thrust frame.

The bevel-gear sett B of the power that main frame 3 sends in power-transfer clutch 2, upper gear box 1 passes to intermediate connecting shaft 12, imports lower tooth roller box 16 into by intermediate connecting shaft 12 again, after the bevel-gear sett C in the lower gear case 16 passes to screw propeller 14.The different requirements that the revolution steering unit is just falling to navigate according to boats and ships, handle and just (to fall) steering wheel 26 that navigates, 27, through just (falling) boat hinge wheel 25,28, just (falling) boat driving chain 24,29, just (falling) boat minor sprocket 22,23, worm shaft 21, worm and gear gear case 20, rotary drive shaft 31, revolution driven wheel 30, drive revolution about the gear A work on the rotary supporting device turning circle 45, and then make adapter sleeve 12, frame 4 and be fixed on main frame 3 on the frame 4, revolution about upper gear box 1 is also followed together, while adapter sleeve 12 also drives lower tooth roller box 16 and screw propeller 14 turns round together, lifting mechanism stretches by the plunger in the hydraulic ram 5 and regulates fence type crane 10 and rise and fall, and then drive lifting table 6 moves up and down, thereby make rotary supporting device 32, frame 4 and the whole Power train and the screw propeller that are contained on the frame 4, the revolution steering unit, lifting slide bar 39 that links to each other with lifting table 6 and thrust plate 13 oscilaltion together that is attached thereto, and offered U type groove D at the ship stern, under the driving of lifting mechanism, screw propeller 14 can pass this U type groove D and be raised on the deck, connecting panel 33 tie bolts of the left and right sides can be thrown off with lifting table 6, the pillar stiffener 7 of the left and right sides also can be thrown off with the sliding sleeve of lifting table 6, brings great convenience to the repairing of parts such as screw propeller especially repairing work like this.

Claims

1, a kind of integral full turning lift type steering oar device, it comprises a Power train that drives the screw propeller rotation, maneuvering propeller and the rotating revolution steering unit of Power train thereof, one drives the revolution steering unit, Power train, the lifting mechanism of screw-propeller lifting, and lifting mode supporting mechanism that matches with lifting mechanism, described revolution steering unit is provided with a supporting rotating together rotary supporting device of Power train (32), described lifting mechanism has a lifting table (6), it is characterized in that: described lifting mode supporting mechanism is by sleeve (40), sternpost (19), lifting slide bar (39), connecting panel (33), the thrust frame that thrust plate (18) is formed, sleeve (40) divides two to be mounted on the U type groove (D) that the ship stern offers and the both sides of screw propeller (14), its upper end is fixed with the ship stern, lower end and sternpost (19) are fixing, two groups of lifting slide bars (39) pass two groups of sleeves (40), its upper end is by connecting panel (33) and removable connection of lifting table (6), the lower end is connected with thrust plate (18), Power train passes ship stern U type groove (D), one pivot shaft (44) of its underpart is rotationally connected with thrust plate (18), and described screw propeller (14) integral body can 360 degree full circle swingings in thrust frame.

2, a kind of integral full turning lift type steering oar device as claimed in claim 1, it is characterized in that: described revolution steering unit is back operator's compartment revolution steering unit, divide and just navigating and falling boat revolution steering unit, the described revolution steering unit that just navigating drives the hinge wheel (25) that just navigating by the steering wheel that just navigates (26), the hinge wheel that just navigating drives the minor sprocket (23) that just navigating by messenger chain (24), just navigating minor sprocket (23) successively by worm shaft (21), worm and gear gear case (20), rotary drive shaft (31), revolution driven wheel (30), driving rotational bearing set (32); The boat revolution steering unit that falls drives the hinge wheel (28) that navigates by the steering wheel that navigates (27), the hinge wheel (28) that navigates drives the minor sprocket (22) that navigates by messenger chain (29), navigate minor sprocket (22) successively by worm shaft (21), worm and gear gear case (20), rotary drive shaft (31), revolution driven wheel (30), driving rotational bearing set (32).

3, a kind of integral full turning lift type steering oar device as claimed in claim 1, it is characterized in that: described revolution steering unit is a front and back major-minor operator's compartment revolution steering unit, preceding operator's compartment revolution steering unit is the revolution steering unit that just navigating, back operator's compartment revolution steering unit is the steering unit that navigates, the described revolution steering unit that just navigating, the steering unit that navigates drives HM Hydraulic Motor (34) by steering wheel that just navigates (26) or the steering wheel that navigates (27) by oil pump and hydraulic circuit thereof, and then drive revolution driven wheel (30), revolution driven wheel (30) driving rotational bearing set (32), described revolution steering unit and the steering unit that navigates of just navigating just navigated and the switching of falling to navigate by a control cock (37) control.

4, as claim 1 or 2 or 3 described a kind of integral full turning lift type steering oar devices, it is characterized in that: described Power train is by main frame (3), power-transfer clutch (2), upper gear box (1), adapter sleeve (12), tween drive spindle (13), lower tooth roller box (16) is formed, main frame (3) is connected by the end of flywheel with power-transfer clutch (2), the other end of power-transfer clutch (2) links to each other with the input shaft of upper gear box (1), upper gear box (1) passes rotary supporting device (32) inner ring with lower tooth roller box (16) by one, the adapter sleeve (12) of ship stern U type groove (D) connects in aggregates, be positioned at the tween drive spindle (13) of adapter sleeve (12), its upper end links to each other with upper gear box (1) output shaft, the lower end links to each other with lower tooth roller box (16) input shaft, and lower tooth roller box (16) drives screw propeller (14) rotation.

5, a kind of integral full turning lift type steering oar device as claimed in claim 4 is characterized in that: described gear case (1,16) up and down respectively is provided with a pair of intermeshing finishing bevel gear cuter (B, C) respectively.

6, a kind of integral full turning lift type steering oar device as claimed in claim 4, it is characterized in that: described rotary supporting device (32) is installed on the lifting table (6), it is provided with single-revolution circle (45), which is provided with a frame (4) that main frame (3), power-transfer clutch (2), upper gear box (1) are installed, the outside of turning circle (45) is provided with and turns round driven wheel (30) gears in mesh.

7, a kind of integral full turning lift type steering oar device as claimed in claim 4 is characterized in that: the cross section of described adapter sleeve (12) is streamline contour.

8, as claim 1 or 2 or 3 described a kind of integral full turning lift type steering oar devices, it is characterized in that: the lifting table of described lifting mechanism (6) has fence type crane (10), crane (10) is provided with hydraulic ram (5), the ship stern is provided with pillar stiffener (7), pillar stiffener (7) passes the sliding sleeve of being located on the lifting table (6), and lifting table (6) can be moved up and down.

9, a kind of integral full turning lift type steering oar device as claimed in claim 4, it is characterized in that: the lifting table of described lifting mechanism (6) has fence type crane (10), crane (10) is provided with hydraulic ram (5), the ship stern is provided with pillar stiffener (7), pillar stiffener (7) passes the sliding sleeve of being located on the lifting table (6), and lifting table (6) can be moved up and down.