CN210152705U - Bottom lifting mechanism of hydraulic support for thin coal seam - Google Patents
Bottom lifting mechanism of hydraulic support for thin coal seam Download PDFInfo
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- CN210152705U CN210152705U CN201921056302.5U CN201921056302U CN210152705U CN 210152705 U CN210152705 U CN 210152705U CN 201921056302 U CN201921056302 U CN 201921056302U CN 210152705 U CN210152705 U CN 210152705U
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Abstract
The utility model discloses a bottom lifting mechanism of a hydraulic support of a thin coal seam, belonging to the field of hydraulic supports; the technical problem to be solved is to provide a fixed jack cylinder, a piston rod with a sliding block extends out to interact with a push rod, and a bottom lifting mechanism for lifting the bottom is realized; the technical scheme for solving the technical problem is as follows: a bottom lifting mechanism of a hydraulic support for a thin coal seam comprises a hydraulic support base, a bottom lifting jack and a push rod, wherein the push rod is arranged below the base, the bottom lifting jack is arranged at the upper part of the push rod, a cylinder body of the bottom lifting jack is connected with the hydraulic support base, a piston rod is arranged inside the cylinder body of the bottom lifting jack, the end part of the piston rod is opposite to the push rod, a sliding block is sleeved on the piston rod, two ends of the sliding block are square blocks, sliding grooves are formed in the opposite side walls of a left box body and a right box body of the hydraulic support base, and the sliding block is in contact with; the utility model discloses but wide application in hydraulic support field.
Description
Technical Field
The utility model relates to a thin seam hydraulic support lifts end mechanism belongs to hydraulic support technical field.
Background
In recent years, along with the mass mining of medium-thickness coal seams, the coal reserves are sharply reduced, the contradiction between production continuation and resource balance mining is increasingly prominent, thin coal seams are gradually developed into main mining coal seams of various mines, and the development of thin coal seam coal mining machines, scraper machines and hydraulic supports is a main subject of the research of the coal industry today and is also a main frame type of the future support market. Due to the particularity of geological conditions of the domestic coal bed, the unmanned mining technology of the coal plough is less applied in China, the domestic thin coal bed hydraulic support is mainly matched with a coal mining machine and a scraper machine, and the development technical difficulty is mainly how to enlarge the space of pedestrians, ensure the space requirement of the coal mining machine for passing the machine, meet the requirements of the telescopic ratio and the bearing of the support, improve the support supporting strength, simplify the arrangement of a hydraulic system and the like in a limited space. Especially, the space size of the pedestrians is a key factor for determining the service performance of the thin coal seam support. Due to the influence of factors such as space, the bottom lifting mechanism is not generally designed for domestic thin coal seam supports at present, but when severe conditions such as extremely soft coal seam floor and water swelling are met, the configuration of the bottom lifting mechanism is a necessary condition for ensuring the use of the supports.
According to the current mature design technology in China, the bottom lifting mechanism mainly has two design structures: one is a bottom lifting jack with sliding shoes, which is connected with a top frame and a pin shaft for a gap bridge of a base, and a sliding shoe groove on the gap bridge is used as a guide; one is to weld a guide cylinder on the gap bridge, a bottom lifting jack is connected with a base through a top frame, a pin shaft and a bolt, and the guide cylinder is used for guiding the movement of the jack, as shown in figure 2. The two structures are that a piston rod of the bottom lifting jack is fixed, a cylinder barrel extends out, an arc surface at the bottom of the cylinder is contacted with an upper plane of a push rod, and the front end of a support is lifted, so that the friction with the ground is reduced, and the support moving is realized. The two structures have larger overall dimension and large installation space, and obviously can not meet the space requirement of the bracket of the thin coal seam.
The existing bottom lifting device of the thin coal seam support mainly has three structures:
(1) the prying plate type bottom lifting device adopts the interaction of a single-action bottom lifting jack and a prying plate to realize the function of lifting the front part of a base. The lifting device has the advantages of simple structure, large lifting force, small installation space, no occupation of pedestrian space and capability of meeting the requirement of the lifting amount of the hydraulic support in the thin coal seam. The coal gangue is easily filled between the prying plate and the base in use, the coal gangue needs to be manually cleaned, or the coal gangue is easily filled to death, and the bottom lifting function is lost. The use effect in a very soft soleplate is not very good.
(2) The lever type bottom lifting device adopts a lever principle, and when the bottom lifting cylinder is retracted, the pressure plate is driven to rotate and acts on the push rod, so that the support base is lifted. The advantage is that it occupies the altitude space little, is applicable to extremely thin coal seam support. The lifting jack has the disadvantages of large width of occupied pedestrian passageway, small effective lifting force, poor loading state of the jack, easy bending damage of the jack, and is mainly applied to the extremely thin coal seam support with the minimum height below 1000 mm.
(3) The otic placode formula lifts end device adopts the cylinder fixed, and the flexible mode of piston rod will lift the frame power and use on the base push rod to realize that the support lifts up the function. The advantage is similar with ripe structure, and simple structure can effectively shorten appearance design size under the same circumstances of lifting volume. The disadvantage is that when the support lifts the bottom and moves the support, the lateral force born by the jack is directly acted on the piston rod, which easily causes the piston rod to be stressed, bent and damaged.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a thin seam hydraulic support lifts end mechanism has overcome the not enough of prior art existence, provides a fixed jack cylinder, will take the piston rod of sliding block to stretch out, with the push rod interact, realizes lifting end mechanism.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a thin seam hydraulic support lifts end mechanism, including the hydraulic support base, lift end jack, the push rod, the hydraulic support base includes two boxes about, the push rod sets up two box middle parts below about, it sets up on push rod upper portion to lift end jack, it links to each other with the hydraulic support base to lift end jack's cylinder body, two box anterior symmetries are provided with fixed otic placode about the hydraulic support base, it is provided with the engaging lug board that corresponds fixed otic placode to lift end jack cylinder body left and right sides symmetry, the engaging lug board links to each other with fixed otic placode, it is provided with the piston rod to lift end jack cylinder body inside, the piston rod tip is just to the push rod, the cover is equipped with the sliding block on the piston rod, the sliding block both ends are square, be provided with the sliding tray on the relative lateral wall of box about the hydraulic support base.
The sliding groove is a groove with an upper opening and a lower closed part.
The sliding block is connected with the piston rod through a fixing pin, and an R-shaped pin is arranged at the end part of the fixing pin.
The connecting ear plate is connected with the fixed ear plate through a fixed pin shaft.
Compared with the prior art, the utility model following beneficial effect has: the cylinder barrel of the bottom lifting jack is fixed, the piston rod with the sliding block extends out to interact with the push rod, so that the function of lifting the front part of the base is realized, the design integrates the advantages of the ear plate type bottom lifting device and the mature sliding shoe type bottom lifting device, the defects are avoided, the structure is simple and practical, the lifting force is large, the installation space is small, the use reliability is high, the requirement of lifting the hydraulic support of the thin coal seam with the lowest height of between 1000 and 1300mm can be met, the overall dimension of the whole bottom lifting device can be effectively reduced, and the requirement of the installation space of the thin coal seam is met; the sliding block is added at the head of the piston rod of the bottom lifting jack and acts with the guide rail on the base, so that the bottom lifting stress condition can be effectively improved, and the use reliability of the bottom lifting device of the thin coal seam support is improved.
Drawings
The present invention will be further described with reference to the accompanying drawings.
Fig. 1 is an exploded view of the structure of the present invention.
Fig. 2 is a schematic view of the bottom lifting mechanism of the present invention.
Fig. 3 is a schematic view of the bottom lifting jack mechanism of the present invention.
In the figure, 1 is a hydraulic support base, 2 is a bottom lifting jack, 3 is a fixed pin shaft, 4 is a sliding block, 5 is a fixed pin, 6 is a push rod, 7 is a fixed lug plate, 8 is a sliding groove, 9 is a connecting lug plate, 10 is a piston rod, and 11 is an R-shaped pin.
Detailed Description
As shown in figures 1, 2 and 3, the utility model relates to a bottom lifting mechanism of a thin coal seam hydraulic support, which comprises a hydraulic support base 1, a bottom lifting jack 2 and a push rod 6, wherein the hydraulic support base 1 comprises a left box body and a right box body, the push rod 6 is arranged below the middle parts of the left box body and the right box body, the bottom lifting jack 2 is arranged at the upper part of the push rod 6, a cylinder body of the bottom lifting jack 2 is connected with the hydraulic support base 1, the front parts of the left box body and the right box body of the hydraulic support base 1 are symmetrically provided with fixed lug plates 7, the left side and the right side of the cylinder body of the bottom lifting jack 2 are symmetrically provided with connecting lug plates 9 corresponding to the fixed lug plates 7, the connecting lug plates 9 are connected with the fixed lug plates 7, a piston rod 10 is arranged inside the cylinder body of the bottom lifting jack 2, the end part of the piston rod 10 is opposite to the push rod 6, a sliding block 4 is sleeved on, sliding block 4 contacts with sliding tray 8, and sliding tray 8 is upper portion opening lower part confined recess, links to each other through fixed pin 5 between sliding block 4 and the piston rod 10, and 5 tip of fixed pin are provided with R type round pin 11, link to each other through fixed pin axle 3 between connection otic placode 9 and the fixed otic placode 7.
The utility model discloses when using, push away the feed liquor direction with the operating valve operating handle, lift jack lower chamber inlet feed liquor at the bottom, go up the chamber and return liquid, the piston rod stretches out, and plane contact is gone up with the push rod to piston rod head sliding block terminal surface, and the pneumatic cylinder action is obstructed, and pneumatic cylinder lower chamber pressure increases, is greater than the support base and lifts up the power requirement until the jack effort to lift the base front portion, realize lifting the frame requirement. After the support is moved, the handle of the operating valve is driven to the bottom lifting retraction direction, the upper cavity of the jack is filled with liquid, the lower cavity is filled with liquid, the piston rod is retracted, and the base is retracted, so that a working cycle is completed.
The bracket moves the bracket and simultaneously lifts the front part of the base so as to be convenient for moving the bracket. Therefore, when the piston rod of the bottom lifting jack extends out to interact with the push rod, not only vertical acting force but also horizontal friction acting force (when the support is moved, the push rod is fixed, the support base moves towards the coal wall direction, so that the bottom lifting cylinder is driven to move towards the coal wall direction, horizontal friction force is generated under the action of positive pressure of the bottom lifting cylinder and the push rod), and the horizontal force acts on the guide rails at the two sides of the middle part of the base through the sliding shoes on the piston rod, so that the horizontal force is transmitted to the base, the bearing condition of the bottom lifting jack is improved, and the use reliability of the bottom lifting device is effectively improved.
The utility model discloses lift end device, when the support lifts end and moves the frame, lift the horizontal force that end device bore and directly transmit the base by the slider of piston rod head on to effectively improved and lifted end device atress situation, improved and lifted end and used the reliability.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (4)
1. The utility model provides a thin coal seam hydraulic support lifts end mechanism, includes hydraulic support base (1), lifts end jack (2), push rod (6), and hydraulic support base (1) is including controlling two boxes, and push rod (6) set up about two box middle parts below, lift end jack (2) and set up on push rod (6) upper portion, and the cylinder body that lifts end jack (2) links to each other its characterized in that with hydraulic support base (1): the front portions of the left box body and the right box body of the hydraulic support base (1) are symmetrically provided with fixed lug plates (7), the left side and the right side of the cylinder body of the bottom-lifting jack (2) are symmetrically provided with connecting lug plates (9) corresponding to the fixed lug plates (7), the connecting lug plates (9) are connected with the fixed lug plates (7), a piston rod (10) is arranged inside the cylinder body of the bottom-lifting jack (2), the end portion of the piston rod (10) is right opposite to a push rod (6), a sliding block (4) is sleeved on the piston rod (10), two ends of the sliding block (4) are square blocks, sliding grooves (8) are formed in the opposite side walls of the left box body and the right box body of the hydraulic support base (1).
2. The hydraulic support bottom lifting mechanism for the thin coal seam according to claim 1, characterized in that: the sliding groove (8) is a groove with an upper opening and a lower closed part.
3. The hydraulic support bottom lifting mechanism for the thin coal seam according to claim 1, characterized in that: the sliding block (4) is connected with the piston rod (10) through a fixing pin (5), and an R-shaped pin (11) is arranged at the end part of the fixing pin (5).
4. The hydraulic support bottom lifting mechanism for the thin coal seam according to claim 1, characterized in that: the connecting ear plate (9) is connected with the fixed ear plate (7) through a fixed pin shaft (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921056302.5U CN210152705U (en) | 2019-07-08 | 2019-07-08 | Bottom lifting mechanism of hydraulic support for thin coal seam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921056302.5U CN210152705U (en) | 2019-07-08 | 2019-07-08 | Bottom lifting mechanism of hydraulic support for thin coal seam |
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| Publication Number | Publication Date |
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| CN210152705U true CN210152705U (en) | 2020-03-17 |
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| CN201921056302.5U Active CN210152705U (en) | 2019-07-08 | 2019-07-08 | Bottom lifting mechanism of hydraulic support for thin coal seam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914916A (en) * | 2021-10-11 | 2022-01-11 | 新能矿业有限公司 | Scalable floated fixed cylinder |
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2019
- 2019-07-08 CN CN201921056302.5U patent/CN210152705U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914916A (en) * | 2021-10-11 | 2022-01-11 | 新能矿业有限公司 | Scalable floated fixed cylinder |
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