CN104196552A - Bottom lifting device and hydraulic support - Google Patents
Bottom lifting device and hydraulic support Download PDFInfo
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- CN104196552A CN104196552A CN201410339636.9A CN201410339636A CN104196552A CN 104196552 A CN104196552 A CN 104196552A CN 201410339636 A CN201410339636 A CN 201410339636A CN 104196552 A CN104196552 A CN 104196552A
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Abstract
The invention discloses a bottom lifting device and a hydraulic support. The bottom lifting device is used for lifting the bottom of the hydraulic support and comprises an upper connecting seat, a lifting frame, a lifting oil cylinder, a lower connecting seat and a slippage block, wherein the upper connecting seat is connected to a base of the hydraulic support. The lifting frame is of a foldable lifting structure, the upper end of the lifting frame is connected to the upper connecting seat, and the lower end of the lifting frame is connected to the lower connecting seat. The lifting oil cylinder is connected with the lifting frame and drives the lifting frame to lift. The slippage block can be hinged to the lower connecting seat in a front-back swinging mode, and the bottom of the slippage block is connected to the upper surface of a pushing and moving rod of the hydraulic support in an abutting mode. The lifting frame and the lifting oil cylinder which are matched are adopted in the bottom lifting device, and a stroke of the lifting oil cylinder can be increased through the lifting frame, so that an installing space required by the bottom lifting device is very small, large bottom lifting height can be produced, and the bottom lifting device is suitable for usage in the hydraulic support for thin seam mining. In addition, the bottom lifting device has good force application effect and can effectively utilize the acting force of the oil cylinder.
Description
Technical field
The present invention relates to engineering machinery field, particularly bottom lifting device and there is the hydraulic support of this bottom lifting device.
Background technology
On the one hand, China has abundant coal resources, and wherein girdle occupies suitable ratio, along with medium-thickness seam is exploited in succession, the shared proportion of exploitation of girdle has just got more and more, and therefore, in coal mining field, thin seam mining just seems important all the more.
On the other hand; in process of coal mining; due to most down-holes complicated geologic conditions; base plate is that mud stone or the argillaceous sandstone of soft easy Buddhist nunization is comparatively general, when hydraulic support underground running job, often there will be front end to prick the phenomenon at the end; be that hydraulic support foundation front end sinks; support can not normally be tried to stop people from fighting each other, and affects normal working face, even occurs the problems such as security incident.In actual production process, in the time that hydraulic support front end sinks, generally adopt bottom lifting device that front end is lifted, process is: bottom lifting device promotes to be arranged on the push rod in gear in hydraulic support, due to rear end and the hydraulic support frame hinging of push rod, so the front end of hydraulic support can lift.
Existing bottom lifting device generally includes the support members such as oil cylinder, therefore can take very large space, and this requires hydraulic support to have enough installing spaces.At present, in, in the hydraulic support of thick coal-layer mining, bottom lifting device generally adopts two kinds of arrangements: lateral arrangement and longitudinally arranging.But, these two kinds of arrangements have shortcoming separately, for the first, bottom lifting device is lateral arrangement, though this mode can be good at saving space, lift but be actually used in the less power that the active force at the end is oil cylinder, and in oil cylinder, larger masterpiece is used in idle stroke, thereby not high, the poor effect of efficiency in actual use, often there is lifting the problems such as end disabler; For the second, bottom lifting device is longitudinally to arrange, the oil cylinder that is bottom lifting device is arranged vertically, but because hydraulic support longitudinal space is less, has both limited the volume of lifting end oil cylinder, thereby the stroke of end oil cylinder is lifted in impact, cause the raising height of bottom lifting device greatly limited, cause again the I&M of bottom lifting device extremely difficult because space is little, once break down in down-hole, to occur insurmountable situation, end function is lifted in impact.
The background technology of comprehensive above-mentioned two aspects, in thin seam mining, the space of hydraulic support is more limited, in this hydraulic support, bottom lifting device is installed, how can efficiently utilize the power of bottom lifting device oil cylinder, and ensure height that bottom lifting device lifts and the convenience of installation and maintenance, be the problem of needing solution in this area badly.
Summary of the invention
In view of this, the present invention proposes a kind of bottom lifting device and has the hydraulic support of this bottom lifting device, and the required installing space of this bottom lifting device is less, and has larger raising height, can be applicable to the hydraulic support that installing space is less, the hydraulic support especially using for girdle.
Particularly, a kind of bottom lifting device provided by the invention, for lifting at the end of hydraulic support, comprises upper connecting base, crane, hoist cylinder, lower connecting base and slipping block; Wherein,
Described upper connecting base is connected on the base of described hydraulic support;
Described crane is foldable lifting structure, and the upper end of described crane is connected to described upper connecting base, and the lower end of described crane is connected to described lower connecting base; Described hoist cylinder is connected with described crane, drives described crane lifting;
Described slipping block can be articulated with to swing described lower connecting base, and described slipping block bottom butt is to the upper surface of the pusher rod of described hydraulic support.
Further, described crane comprises four first connecting rods and four second connecting rods, wherein,
The upper end of described first connecting rod and described upper connecting base are hinged, and the lower end of described first connecting rod and the upper end of described second connecting rod are hinged, and the lower end of described second connecting rod and described lower connecting base are hinged, form scissors-type structure;
Described first connecting rod and described second connecting rod form four described scissors-type structures altogether, and the opening direction of every two described scissors-type structures relatively forms one group, are arranged at respectively the side that described upper connecting base and described lower connecting base are corresponding;
The upper end of described hoist cylinder and described upper connecting base are hinged, and the lower end of described hoist cylinder two described second connecting rods identical with bearing of trend are hinged; Or the lower end of described hoist cylinder and described lower connecting base are hinged, the upper end of described hoist cylinder two described first connecting rods identical with bearing of trend are hinged.
Further, both sides relative on described upper connecting base have upper ear plate, and described first connecting rod is hinged to the described upper ear plate of described upper connecting base;
Both sides relative on described lower connecting base have lower ear plate, and described second connecting rod is hinged to the described lower ear plate of described lower connecting base.
Further, the two ends of two described upper ear plates offer respectively the first waist-shaped hole, and the upper end of two described first connecting rods that bearing of trend is identical is hinged to slidably by same jointed shaft in described first waist-shaped hole of two corresponding one end of described upper ear plate;
And/or the two ends of two described lower ear plates offer respectively the second waist-shaped hole, the lower end of two described second connecting rods that bearing of trend is identical is hinged in described second waist-shaped hole of two corresponding one end of described lower ear plate slidably by same jointed shaft.
Further, described crane comprises four first connecting rods, four second connecting rods and four third connecting rods, wherein,
The upper end of described first connecting rod and described upper connecting base are hinged, the lower end of described first connecting rod and the upper end of described second connecting rod are hinged, the lower end of described second connecting rod and the upper end of described third connecting rod are hinged, the lower end of described third connecting rod and described lower connecting base are hinged, form described scissors-type structure;
Described first connecting rod, described second connecting rod and described third connecting rod form four described scissors-type structures altogether, and the opening direction of every two described scissors-type structures relatively forms one group, are arranged at respectively the side that described upper connecting base and described lower connecting base are corresponding;
Described hoist cylinder comprises hoist cylinder and lower hoist cylinder, and the upper end of described upper hoist cylinder and described upper connecting base are hinged, and the lower end of described upper hoist cylinder two described second connecting rods identical with bearing of trend are hinged; The lower end of described lower hoist cylinder and described lower connecting base are hinged, the upper end of described lower hoist cylinder and described in two other second connecting rod hinged.
Further, the bottom of described slipping block is curved surfaces.
Further, be provided with the limited block that the described slipping block of restriction moves upward on described lower connecting base, the described limited block respectively two ends of corresponding described slipping block arranges.
Further, described bottom lifting device also comprises the fixed connecting piece being connected with the base of described hydraulic support, and described upper connecting base is connected with the base of described hydraulic support by described fixed connecting piece.
Further, the base of described fixed connecting piece and described hydraulic support removably connects, and is provided with positioning convex on described fixed connecting piece, is provided with the locating slot that multiple and described positioning convex mates on the base of described hydraulic support.
On the other hand, the present invention also provides a kind of hydraulic support, is provided with the bottom lifting device described in as above any one.
Bottom lifting device of the present invention adopts the cooperation of crane and hoist cylinder, on the one hand, crane can amplifying lifting oil cylinder stroke, allow to adopt and can obtain larger lifting travel compared with the oil cylinder of short stroke as hoist cylinder, therefore, in the very little situation of the required installing space of bottom lifting device of the present invention, can produce the larger end height of lifting, be more suitable for using in the hydraulic support for thin seam mining; On the other hand, the folding and expanding of crane is realized lifting and is lifted end action, and the direction of folding and expanding is with to lift end direction basically identical, thereby bottom lifting device of the present invention has good application of force effect, more effectively utilizes cylinder force.
Hydraulic support of the present invention is provided with above-mentioned bottom lifting device, therefore also has identical technique effect, repeats no more.
Brief description of the drawings
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
The structural representation of a kind of bottom lifting device that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the lower connecting base of the bottom lifting device that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the fixed connecting piece of the bottom lifting device that Fig. 3 provides for the embodiment of the present invention;
The structural representation of a kind of hydraulic support that Fig. 4 provides for the embodiment of the present invention, this Figure only shows hydraulic support foundation and bottom lifting device;
Fig. 5 is the lateral view of hydraulic support shown in Fig. 4, this Figure only shows hydraulic support foundation and bottom lifting device;
Fig. 6 is the part-structure schematic diagram of hydraulic support shown in Fig. 4.
Description of reference numerals
10, upper connecting base; 11, upper ear plate; 20, crane; 21, first connecting rod; 22, second connecting rod; 30, lower connecting base; 31, lower ear plate; 32, the second waist-shaped hole; 40, hoist cylinder; 50, slipping block; 60, fixed connecting piece; 61, positioning convex; 62, reinforcing rib; 70, limited block;
100, hydraulic support; 110, base; 111, locating slot; 120, pusher rod.
Detailed description of the invention
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the present invention can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
The structural representation of a kind of bottom lifting device that Fig. 1 provides for the embodiment of the present invention; The structural representation of the lower connecting base of the bottom lifting device that Fig. 2 provides for the embodiment of the present invention; The structural representation of the fixed connecting piece of the bottom lifting device that Fig. 3 provides for the embodiment of the present invention; The structural representation of a kind of hydraulic support that Fig. 4 provides for the embodiment of the present invention, this Figure only shows hydraulic support foundation and bottom lifting device; Fig. 5 is the lateral view of hydraulic support shown in Fig. 4, this Figure only shows hydraulic support foundation and bottom lifting device; Fig. 6 is the part-structure schematic diagram of hydraulic support shown in Fig. 4.
Embodiments of the invention provide a kind of bottom lifting device and hydraulic support, for convenience of description, below in conjunction with referring to Fig. 1 to Fig. 5, are example taking bottom lifting device while being applied to hydraulic support, introduce in detail structure and the annexation of this bottom lifting device and hydraulic support.
As shown in Figure 1 to Figure 3, the bottom lifting device that the embodiment of the present invention provides comprises upper connecting base 10, crane 20, lower connecting base 30, hoist cylinder 40 and slipping block 50.Upper connecting base 10 is connected to (in conjunction with referring to Fig. 4 and Fig. 5) on the base 110 of hydraulic support 100; Crane 20 is foldable lifting structure, and the upper end of crane 20 is connected to upper connecting base 10, and the lower end of crane 20 is connected to lower connecting base 30; Hoist cylinder 40 is connected with crane 20, drives described crane 20 liftings; Slipping block 50 can be articulated with to swing lower connecting base 30, and in conjunction with Fig. 4 and Fig. 5, these slipping block 50 bottom butts are to the upper surface of the pusher rod 120 of hydraulic support 100.
As the preferred version of the present embodiment, shown in Fig. 4 and Fig. 5, bottom lifting device in this embodiment also comprises the fixed connecting piece 60 being connected with the base 110 of hydraulic support 100, upper connecting base 10 is connected with the base 110 of hydraulic support 100 by this fixed connecting piece 60, and upper connecting base 10 preferably removably connects by bolt with fixed connecting piece 60.Shown in Figure 3, this fixed connecting piece 60 preferably removably connects by bolt and base 110, and on fixed connecting piece 60, be provided with positioning convex 61, the multiple locating slots 111 that arrange on the base 110 of this positioning convex 61 and hydraulic support 100 mate, and the structure of locating slot 111 can be shown in Figure 6.Fixed connecting piece 60 removably connects with base 110, is convenient to adjust the installation site of bottom lifting device, and then adjusts the raising height of bottom lifting device, and flexibility while having improved the mounting arrangements of bottom lifting device.Positioning convex 61 and locating slot 111 mate mutually, both can be used for limiting the position of fixed connecting piece 60 relative bases 110, can be used for again bearing the active force between fixed connecting piece 60 and base 110, avoid bolt strained excessive and damage.With further reference to diagram, in this embodiment, fixed connecting piece 60 has side plate and base plate, is provided with reinforcing rib 62 between side plate and base plate, in order to strengthen the stress performance of fixed connecting piece 60.
In this embodiment, positioning convex 61 is provided with two, locating slot 111 is provided with three, spacing between spacing between positioning convex 61 and locating slot 111 adapts, the quantity of positioning convex 61 and locating slot 111 can be selected other suitable numbers in other embodiments, is not limited to the configuration in the present embodiment; In addition fixed connecting piece 60 can also be fixedly connected with base 110 in other embodiments, as is welded and fixed.
Refer again to Fig. 1, crane 20 comprises four first connecting rods 21 and four second connecting rods 22, the upper end of first connecting rod 21 and upper connecting base 10 are hinged, the upper end of the lower end of first connecting rod 21 and second connecting rod 22 is hinged, the lower end of second connecting rod 22 and lower connecting base 30 are hinged, make crane 20 form scissors-type structure.Particularly, as shown in the figure, on upper connecting base 10, relative both sides have totally two upper ear plates 11, and first connecting rod 21 is hinged to this upper ear plate 11 of upper connecting base 10, and two first connecting rods 21 that are hinged to same upper ear plate 11 extend to different directions, be X-type and arrange; Equally, on lower connecting base 30, relative both sides also have totally two lower ear plates 31, and the lower end of second connecting rod 22 is hinged to the lower ear plate 31 of this lower connecting base 30, and two second connecting rods 22 that are hinged to same lower ear plate 31 are to different directions extension, are X-type and arrange.The lower end of first connecting rod 21 is hinged with the upper end of corresponding second connecting rod 22, form altogether four described scissors-type structures, and the opening direction of every two scissors-type structures forms one group relatively, be arranged at respectively a side of upper connecting base 10 and described lower connecting base 30 correspondences.
As shown in Figure 1, the upper end of hoist cylinder 40 and upper connecting base 10 are hinged, and the lower end of hoist cylinder 40 two second connecting rods 22 identical with bearing of trend are hinged.In this embodiment, hoist cylinder 40 is preferably arranged on the inside of this crane 20, can save like this arrangement space, is more conducive to be arranged on the hydraulic support foundation for thin seam mining.In other embodiments, the lower end of hoist cylinder 40 can also be hinged with lower connecting base 30, the upper end of hoist cylinder 40 two first connecting rods 21 identical with bearing of trend are hinged, the present invention does not limit this, as long as hoist cylinder can drive crane to fold or launch, to realize elevating function.
As the preferred version of the present embodiment, as depicted in figs. 1 and 2, the two ends of the lower ear plate 31 of the lower connecting base 30 in this embodiment offer respectively two the second waist-shaped holes 32, and the lower end of two second connecting rods 22 that bearing of trend is identical is hinged in second waist-shaped hole 32 of two lower ear plate 31 corresponding one end slidably by same jointed shaft.The Length Ratio of the second waist-shaped hole 32 is large with the diameter of its hinged jointed shaft coordinating, allow jointed shaft to slide therein, can slide along the second waist-shaped hole 32 of lower ear plate 31 in the lower end that is second connecting rod 22, thereby can be by launching at crane 20 or when folding lifting, the position of relative the second waist-shaped hole 32 in mobile second connecting rod 22 lower ends, can realize and increase the elevated height of crane 20 on the one hand, to increase the raising height of bottom lifting device, height can reduce on the other hand folding packing up time, is convenient to this bottom lifting device and installs in narrow space.Two second connecting rods 22 adopt same jointed shafts and lower ear plate 31 hinged jointly, are convenient to control these two second connecting rods 22 and are synchronized with the movement.
In like manner, be correspondingly provided with hinged cooperation of upper end of the first waist-shaped hole and first connecting rod 21 on the upper ear plate 11 of upper connecting base 10, its structure and effect are identical with the second waist-shaped hole 32, repeat no more, and also do not show this first waist-shaped hole in accompanying drawing of the present invention completely.
Shown in Fig. 1 and Fig. 2, there is square hole at lower connecting base 30 middle parts, in this square hole, slipping block 50 can be articulated with to swing lower connecting base 30, slipping block 50 bottom butts are to the upper surface of the pusher rod 120 of hydraulic support 100, the bottom of slipping block 50 is curved surfaces, adopting curved surfaces is when hydraulic support 100 is lifted for bottom lifting device, slipping block 50 swings around its hinge axes, relative lower connecting base 30 perks in its rear end, now the curved surfaces of slipping block 50 bottoms can contact with the upper surface forming surface of pusher rod 120, change the way of contact of slipping block 50 and pusher rod 120, can after lifting, move like this in frame process, improve the stressed of the two, avoid the two compared with quick-wearing, elongated component application life.
As further preferred version, as shown in Figure 2, on lower connecting base 30 in this embodiment, be provided with the limited block 70 that limit slip piece 50 moves upward, the limited block 70 respectively two ends of corresponding slipping block 50 arranges, the two ends of major limitation slipping block 50 are upturned, in the time that bottom lifting device lifts hydraulic support, limited block 70 can bear slipping block 50 active force upwards like this, avoids slipping block 50 stressed excessive and impaired with the jointed shaft of lower connecting base 30 hinged use.Those skilled in the art should be understood that, limited block 70 is stressed in order to limit slipping block 50 in the time that bottom lifting device lifts herein, therefore, in the time that bottom lifting device does not lift, between limited block 70 and slipping block 50, preferably have gap, allow slipping block 50 to rotate around its jointed shaft, make slipping block 50 can after lifting, change the contact form of its bottom and pusher rod 120.
Bottom lifting device of the present invention adopts the cooperation of crane and hoist cylinder, and has improved the annexation of bottom lifting device and hydraulic support, and compared with existing bottom lifting device, tool of the present invention has the following advantages:
1, adopt the cooperation of crane and hoist cylinder, crane can amplifying lifting oil cylinder stroke, allow to adopt and can obtain larger lifting travel compared with the oil cylinder of short stroke as hoist cylinder, therefore, in the very little situation of the required installing space of bottom lifting device of the present invention, can produce the larger end height of lifting, in other words in the situation that thering is bottom lifting device and thering is identical raising height, the flexibility of bottom lifting device mounting arrangements of the present invention is higher, is more suitable for using in the hydraulic support for thin seam mining;
2, the folding and expanding of crane is realized lifting and is lifted end action, and the direction of folding and expanding is with to lift end direction basically identical, thereby bottom lifting device of the present invention has good application of force effect, more effectively utilizes cylinder force;
3, bottom lifting device adopts the slipping block of curved surfaces to contact with pusher rod, and in the time lifting the end, the two contact form changes face contact into, is conducive to improve the two contact, reduces wear;
4, bottom lifting device and hydraulic support foundation removably connect, and facilitate the dismounting of bottom lifting device to safeguard, coordinate on this basis the feature of bottom lifting device self structure, the versatility of bottom lifting device of the present invention in different hydraulic supports is higher.
More than the preferred embodiment of the present invention and preferred version thereof, crane 20 in this embodiment is in fact to have adopted two-stage scissors-type structure, form two-stage lifting, as optional embodiment, the crane 20 of bottom lifting device of the present invention can also adopt three grades of scissors-type structures to form three grades of liftings.Particularly, crane can comprise four first connecting rods, four second connecting rods and four third connecting rods, wherein, upper end and the upper connecting base of first connecting rod are hinged, the lower end of first connecting rod and the upper end of second connecting rod are hinged, the lower end of second connecting rod and the upper end of third connecting rod are hinged, and lower end and the lower connecting base of third connecting rod are hinged, form described scissors-type structure; First connecting rod, second connecting rod and third connecting rod form four scissors-type structures altogether, and the opening direction of every two described scissors-type structures relatively forms one group, are arranged at respectively the side that upper connecting base and lower connecting base are corresponding; Hoist cylinder preferably arranges two, comprises hoist cylinder and lower hoist cylinder, and upper end and the upper connecting base of upper hoist cylinder are hinged, and the lower end of upper hoist cylinder two second connecting rods identical with bearing of trend are hinged; Lower end and the lower connecting base of lower hoist cylinder are hinged, and the upper end of lower hoist cylinder and two other second connecting rod are hinged.It should be noted that, the scissors-type structure now forming and some difference of scissors-type structure of above preferred embodiment, this scissors-type structure is first connecting rod, second connecting rod and three layers of lifting structure of third connecting rod composition, and the two-layer lift structure that scissors-type structure in above preferred embodiment only has first connecting rod and second connecting rod to form.Crane in this optional embodiment adopts three grades of scissors-type structures, can will further increase the raising height of bottom lifting device.Other structures of bottom lifting device connect and can, referring to the annexation in above preferred embodiment, repeat no more.
Correspondingly, the embodiment of the present invention also provides a kind of hydraulic support 100, as shown in Figure 5 to Figure 6, in accompanying drawing, only show the base 110 of hydraulic support 100, in this hydraulic support 100, be provided with the bottom lifting device that above-described embodiment provides, concrete annexation, referring to the description in bottom lifting device embodiment, repeats no more herein.Owing to being provided with above-mentioned bottom lifting device, therefore, this hydraulic support 100 has technique effect same as described above, does not also repeat.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a bottom lifting device, for lifting at the end of hydraulic support (100), it is characterized in that, comprise upper connecting base (10), crane (20), hoist cylinder (40), lower connecting base (30) and slipping block (50); Wherein,
Described upper connecting base (10) is connected on the base (110) of described hydraulic support (100);
Described crane (20) is foldable lifting structure, the upper end of described crane (20) is connected to described upper connecting base (10), and the lower end of described crane (20) is connected to described lower connecting base (30); Described hoist cylinder (40) is connected with described crane (20), drives described crane (20) lifting;
Described slipping block (50) can be articulated with to swing described lower connecting base (30), and described slipping block (50) bottom butt is to the upper surface of the pusher rod (120) of described hydraulic support (100).
2. bottom lifting device according to claim 1, is characterized in that, described crane (20) comprises four first connecting rods (21) and four second connecting rods (22), wherein,
The upper end of described first connecting rod (21) and described upper connecting base (10) are hinged, the upper end of the lower end of described first connecting rod (21) and described second connecting rod (22) is hinged, the lower end of described second connecting rod (22) and described lower connecting base (30) are hinged, form scissors-type structure;
Described first connecting rod (21) and described second connecting rod (22) form four described scissors-type structures altogether, and the opening direction of every two described scissors-type structures forms one group relatively, be arranged at respectively the side that described upper connecting base (10) and described lower connecting base (30) are corresponding;
The upper end of described hoist cylinder (40) and described upper connecting base (10) are hinged, and the lower end of described hoist cylinder (40) two described second connecting rods (22) identical with bearing of trend are hinged; Or the lower end of described hoist cylinder (40) and described lower connecting base (30) are hinged, the upper end of described hoist cylinder (40) two described first connecting rods (21) identical with bearing of trend are hinged.
3. bottom lifting device according to claim 2, it is characterized in that, the upper relative both sides of described upper connecting base (10) have upper ear plate (11), and described first connecting rod (21) is hinged to the described upper ear plate (11) of described upper connecting base (10);
The upper relative both sides of described lower connecting base (30) have lower ear plate (31), and described second connecting rod (22) is hinged to the described lower ear plate (31) of described lower connecting base (30).
4. bottom lifting device according to claim 3, it is characterized in that, the two ends of two described upper ear plates (11) offer respectively the first waist-shaped hole, and the upper end of two described first connecting rods (21) that bearing of trend is identical is hinged to slidably by same jointed shaft in described first waist-shaped hole of the corresponding one end of two described upper ear plates (11);
And/or, the two ends of two described lower ear plates (31) offer respectively the second waist-shaped hole (32), and the lower end of two described second connecting rods (22) that bearing of trend is identical is hinged in described second waist-shaped hole (32) of the corresponding one end of two described lower ear plates (31) slidably by same jointed shaft.
5. bottom lifting device according to claim 1, is characterized in that, described crane (20) comprises four first connecting rods (21), four second connecting rods (22) and four third connecting rods, wherein,
The upper end of described first connecting rod (21) and described upper connecting base (10) are hinged, the upper end of the lower end of described first connecting rod (21) and described second connecting rod (22) is hinged, the lower end of described second connecting rod (22) and the upper end of described third connecting rod are hinged, the lower end of described third connecting rod and described lower connecting base (30) are hinged, form described scissors-type structure;
Described first connecting rod (21), described second connecting rod (22) and described third connecting rod form four described scissors-type structures altogether, and the opening direction of every two described scissors-type structures forms one group relatively, be arranged at respectively the side that described upper connecting base (10) and described lower connecting base (30) are corresponding;
Described hoist cylinder (40) comprises hoist cylinder and lower hoist cylinder, the upper end of described upper hoist cylinder and described upper connecting base (10) are hinged, and the lower end of described upper hoist cylinder two described second connecting rods (22) identical with bearing of trend are hinged; The lower end of described lower hoist cylinder and described lower connecting base (30) are hinged, the upper end of described lower hoist cylinder and described in two other second connecting rod (22) hinged.
6. according to the bottom lifting device described in any one in claim 1-5, it is characterized in that, the bottom of described slipping block (50) is curved surfaces.
7. bottom lifting device according to claim 6, it is characterized in that, on described lower connecting base (30), be provided with the limited block (70) that the described slipping block of restriction (50) moves upward, described limited block (70) the respectively two ends of corresponding described slipping block (50) arranges.
8. according to the bottom lifting device described in any one in claim 1-5, it is characterized in that, described bottom lifting device also comprises the fixed connecting piece (60) being connected with the base (110) of described hydraulic support (100), and described upper connecting base (10) is connected with the base (110) of described hydraulic support (100) by described fixed connecting piece (60).
9. bottom lifting device according to claim 8, it is characterized in that, described fixed connecting piece (60) removably connects with the base (110) of described hydraulic support (100), and on described fixed connecting piece (60), be provided with positioning convex (61), on the base (110) of described hydraulic support (100), be provided with the locating slot (111) that multiple and described positioning convex (61) mates.
10. a hydraulic support, is characterized in that, is provided with the bottom lifting device as described in any one in claim 1-9.
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| CN201410339636.9A CN104196552A (en) | 2014-07-16 | 2014-07-16 | Bottom lifting device and hydraulic support |
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| CN201410339636.9A CN104196552A (en) | 2014-07-16 | 2014-07-16 | Bottom lifting device and hydraulic support |
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| CN104533479A (en) * | 2014-12-22 | 2015-04-22 | 中煤北京煤矿机械有限责任公司 | Multi-action blocking block for base |
| CN107876898A (en) * | 2017-12-14 | 2018-04-06 | 江苏跃发建设有限公司 | The equipment for automatically cutting ultralight steel |
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| CN104533479A (en) * | 2014-12-22 | 2015-04-22 | 中煤北京煤矿机械有限责任公司 | Multi-action blocking block for base |
| CN107876898A (en) * | 2017-12-14 | 2018-04-06 | 江苏跃发建设有限公司 | The equipment for automatically cutting ultralight steel |
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Application publication date: 20141210 |