Floor-lifting mechanism and hydraulic support

Abstract

The present invention provides a bottom-lifting mechanism and a hydraulic support. The bottom-lifting mechanism includes: a bottom-lifting jack, which includes a piston rod. The piston rod is provided with a first arc structure and a first pin hole. The first arc structure is located at the end of the piston rod. The first pin hole penetrates the piston rod along the direction perpendicular to the extension direction of the piston rod, and the first pin hole is located at one end of the piston rod close to the first arc structure; a base, which is provided with a sleeve structure. The bottom-lifting jack is arranged in the sleeve structure, and the bottom-lifting jack can move along the axial direction of the sleeve structure; a bottom-lifting frame, which is arranged on the base and above the sleeve structure. The top plate of the bottom-lifting frame is provided with a second arc structure; the first arc structure is in contact with the second arc structure. The bottom-lifting mechanism of the present invention, on the one hand, avoids the drawback that the sliding shoe structure is likely to fall off in the base slideway, and on the other hand, avoids the damage caused by the pin shaft being bent under force during the operation of the bottom-lifting jack due to the excessive clearance at the hinge joint of the existing sleeve-type mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine equipment, and in particular, to a bottom-lifting mechanism and a hydraulic support. Background Art

[0002] In the prior art, the common bottom-lifting jacks mainly have two structural forms: a sliding shoe structure and a sleeve structure. The failure point of the sliding shoe structure mainly lies in that the sliding shoe structure of the bottom-lifting jack is prone to falling off in the base slideway. For the sleeve structure, the bottom-lifting jack is connected to the base by a pin shaft, and the top is connected to the bottom-lifting cover plate by bolts. The bottom-lifting jack cylinder runs up and down in the sleeve of the base. The main failure point of this structure is that there is a large gap between the cylinder barrel of the bottom-lifting jack and the base sleeve. There is also a gap between the pin hole on the sleeve and the pin shaft. Such a clearance fit relationship causes the pin shaft to be bent under force during the operation of the bottom-lifting jack, and the above bolts are deformed accordingly. The pipe joint hose of the bottom-lifting jack interferes with the base sleeve, resulting in failures such as damage and falling off. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, a first aspect of the present invention provides a bottom-lifting mechanism.

[0005] A second aspect of the present invention provides a hydraulic support.

[0006] In view of this, a first aspect of the present invention provides a bottom-lifting mechanism, including: a bottom-lifting jack, the bottom-lifting jack includes a piston rod, a first arc structure and a first pin hole are provided on the piston rod, wherein the first arc structure is located at the end of the piston rod, the first pin hole penetrates the piston rod along a direction perpendicular to the extension direction of the piston rod, and the first pin hole is located at one end of the piston rod close to the first arc structure; a base, the base is provided with a sleeve structure, the bottom-lifting jack is arranged in the sleeve structure, and the bottom-lifting jack can move along the axial direction of the sleeve structure; a bottom-lifting frame, the bottom-lifting frame is arranged on the base and above the sleeve structure, and a second arc structure is provided on the top plate of the bottom-lifting frame; wherein, the first arc structure is in contact with the second arc structure.

[0007] The bottom-lifting mechanism provided by the present invention includes a bottom-lifting jack, a base and a bottom-lifting frame. The bottom-lifting jack can move axially along the sleeve structure of the base, avoiding the drawback that the sliding shoe is prone to falling off in the base slideway when using the sliding shoe structure, and there is no need for the welding process of the base slideway. The piston rod is hinged to the bottom-lifting frame through the first pin hole, and the first arc structure at the top of the piston rod is in contact with the second arc structure on the top plate of the bottom-lifting frame, avoiding the damage caused by the pin shaft being bent under force during the operation of the bottom-lifting jack due to excessive clearance at the hinge joint of the existing sleeve-type bottom-lifting jack.

[0008] In addition, the bottom-lifting mechanism in the above technical solution provided by the present invention may further have the following additional technical features:

[0009] In the above technical solution, further, the bottom-lifting mechanism further includes a push rod. The push rod is located on the center line of the base along the length direction, one end of the push rod extends out of the base, and the sleeve structure is located above the push rod.

[0010] In this technical solution, the push rod is located on the center line of the base along the length direction, and one end of it extends out of the base to connect to the conveyor. The push rod is used to push the conveyor on the one hand and the movement of the hydraulic support itself on the other hand. And the sleeve structure is located above the push rod. When the bottom-lifting jack works, the cylinder body of the bottom-lifting jack continuously descends along the sleeve structure and forms a friction contact with the push rod without deviation. The sleeve structure plays a guiding role.

[0011] In any of the above technical solutions, further, the base further includes: a cross-over plate, the cross-over plate is arranged on the base, the cross-over plate is oppositely arranged to the bottom-lifting jack, and the cross-over plate is located above the push rod; a first rib plate, the first rib plate is perpendicular to the cross-over plate and is connected to the cross-over plate; a second rib plate, the second rib plate is perpendicular to the cross-over plate and is connected to the cross-over plate; wherein, the first rib plate and the second rib plate are located on the same side of the cross-over plate, and the sleeve structure is located between the first rib plate and the second rib plate.

[0012] In this technical solution, the cross-over plate is respectively connected to the first rib plate and the second rib plate, serving as a part of the supporting structure of the sleeve structure.

[0013] In any of the above technical solutions, further, the base further includes: a first cover plate, the first cover plate is perpendicular to the cross-over plate and is connected to the cross-over plate; a second cover plate, the second cover plate is perpendicular to the cross-over plate and is connected to the cross-over plate; wherein, the first cover plate and the second cover plate are arranged at intervals along the axial direction of the sleeve structure, the first cover plate and the second cover plate are located between the first rib plate and the second rib plate, the first cover plate is provided with a first through hole, the second cover plate is provided with a second through hole, and the sleeve structure passes through the first through hole and the second through hole and is connected to the first through hole and the second through hole.

[0014] In this technical solution, the sleeve structure passes through the first through hole and the second through hole and is connected to the first cover plate and the second cover plate. The first cover plate and the second cover plate are respectively connected to the cross-over plate, the first rib plate and the second rib plate. With such a setting, the cross-over plate, the first rib plate, the second rib plate, the first cover plate, the second cover plate and the sleeve structure enclose a box-type structure, making this part of the base structure compact and firm, and better cooperating with the work of the bottom-lifting jack.

[0015] In any of the above technical solutions, further, the base further includes: a first ear plate perpendicular to and connected to the crossover plate; a second ear plate perpendicular to and connected to the crossover plate, the first ear plate and the second ear plate being on the same side of the crossover plate, and the bottom-lifting jack being located between the first ear plate and the second ear plate; a second pin hole penetrating through the first ear plate and the second ear plate.

[0016] In this technical solution, a first ear plate and a second ear plate are provided on the base, and a second pin hole penetrating through the first ear plate and the second ear plate is provided, so that the base is connected to the bottom-lifting frame through the second pin hole.

[0017] In any of the above technical solutions, further, the bottom-lifting frame further includes: side plates connected to the top plate and located on both sides of the top plate, the side plates being provided with third pin holes; third ear plates connected to the top plate and located on both sides of the top plate, the third ear plates and the side plates surrounding the periphery of the top plate, and the third ear plates being provided with fourth pin holes.

[0018] In this technical solution, the side plates and the third ear plates surround the periphery of the top plate. The third pin holes on the side plates are used for the hinge connection between the bottom-lifting jack and the bottom-lifting frame, and the fourth pin holes on the third ear plates are used for the hinge connection between the bottom-lifting frame and the base, so as to drive one end of the base through the bottom-lifting frame when the bottom-lifting jack works and complete the lifting of the base.

[0019] In any of the above technical solutions, further, the bottom of the bottom-lifting jack is provided with a third arc structure, and the third arc structure is in contact with the push rod based on the working condition of the bottom-lifting jack.

[0020] In this technical solution, when the bottom-lifting jack works, the piston rod slides relative to the cylinder body, and the cylinder body continuously descends. The third arc structure at the bottom of the bottom-lifting hydraulic cylinder forms a frictional contact with the upper surface of the push rod, avoiding the large impact caused by the contact.

[0021] In any of the above technical solutions, further, the first ear plate and the second ear plate are respectively provided in pairs.

[0022] In this technical solution, the first ear plate and the second ear plate are respectively provided in pairs, making the hinge at this place more firm and reliable.

[0023] In any of the above technical solutions, further, the bottom-lifting mechanism further includes: a first pin shaft passing through the first pin hole and the third pin hole for hinge connection between the bottom-lifting jack and the bottom-lifting frame; a second pin shaft passing through the second pin hole and the fourth pin hole for hinge connection between the bottom-lifting frame and the base.

[0024] In this technical solution, the first pin shaft passes through the first pin hole on the bottom-lifting jack and the third pin hole on the bottom-lifting frame, realizing the hinged connection between the bottom-lifting jack and the bottom-lifting frame. The second pin shaft passes through the second pin hole on the base and the fourth pin hole on the bottom-lifting frame, realizing the hinged connection between the base and the bottom-lifting frame. With such a setting, the adaptability between the base, the bottom-lifting frame and the bottom-lifting jack is better. When the bottom-lifting jack works, one end of the base is driven by the bottom-lifting frame, thus realizing the bottom-lifting function.

[0025] The second aspect of the present invention provides a hydraulic support, comprising: a top beam and a column; and a bottom-lifting mechanism as in any of the above technical solutions; wherein, the column is connected to the top beam and the bottom-lifting mechanism.

[0026] In this technical solution, since the hydraulic support includes the bottom-lifting mechanism as in any of the above technical solutions, the hydraulic support has all the beneficial effects of the bottom-lifting mechanism in any of the above technical solutions, and further improves the service life of the hydraulic support. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 is a schematic structural view of the bottom-lifting mechanism according to an embodiment of the present invention;

[0029] Figure 2 is Figure 1 a top view of the shown bottom-lifting mechanism;

[0030] Figure 3 is Figure 2 a sectional view of the shown bottom-lifting mechanism taken along the A-A direction;

[0031] Figure 4 is a schematic structural view of the base according to an embodiment of the present invention;

[0032] Figure 5 is Figure 4 a top view of the shown base;

[0033] Figure 6 is Figure 5 a sectional view of the shown base taken along the B-B direction;

[0034] Figure 7 is a schematic structural view of the first cover plate according to an embodiment of the present invention;

[0035] Figure 8 is a schematic structural view of the bottom-lifting jack according to an embodiment of the present invention;

[0036] Figure 9 is a front view of the bottom-lifting frame according to an embodiment of the present invention;

[0037] Figure 10 is Figure 9 a sectional view of the bottom-lifting frame shown in the C-C direction;

[0038] Figure 11 is Figure 9 a top view of the bottom-lifting frame shown.

[0039] Among them, Figures 1 to 11 the corresponding relationship between the reference numerals and the component names in the figure is as follows:

[0040] 1 bottom-lifting mechanism, 100 bottom-lifting jack, 102 first arc structure, 104 first pin hole, 106 third arc structure, 200 base, 202 sleeve structure, 204 cross-over plate, 206 first rib plate, 208 second rib plate, 210 first cover plate, 212 second cover plate, 214 first through hole, 216 first ear plate, 218 second ear plate, 220 second pin hole, 300 bottom-lifting frame, 302 top plate, 304 second arc structure, 306 side plate, 308 third pin hole, 310 third ear plate, 312 fourth pin hole, 314 lifting ring, 400 push rod, 500 first pin shaft, 600 second pin shaft. Specific embodiments

[0041] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0042] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0043] Next, refer to Figures 1 to 11 to describe the bottom-lifting mechanism 1 and the hydraulic support provided according to some embodiments of the present invention.

[0044] Embodiment 1

[0045] As Figure 1 shown, a bottom-lifting mechanism 1 proposed in the first embodiment of the present invention includes: a bottom-lifting jack 100, a base 200 and a bottom-lifting frame 300.

[0046] As Figure 8As shown in the figure, the bottom-lifting jack 100 includes a piston rod, on which a first arc structure 102 and a first pin hole 104 are provided. Among them, the first arc structure 102 is located at the end of the piston rod, and the first pin hole 104 penetrates the piston rod along a direction perpendicular to the extension direction of the piston rod. The first pin hole 104 is located at one end of the piston rod close to the first arc structure 102.

[0047] As Figures 1 to 3 shown in the figure, the base 200 is provided with a sleeve structure 202, and the bottom-lifting jack 100 is arranged inside the sleeve structure 202. The bottom-lifting jack 100 can move along the axial direction of the sleeve structure 202.

[0048] The bottom-lifting frame 300 is arranged on the base 200, above the sleeve structure 202. The top plate 302 of the bottom-lifting frame 300 is provided with a second arc structure 304.

[0049] The first arc structure 102 is in contact with the second arc structure 304.

[0050] Specifically, the bottom-lifting jack 100 can move axially along the sleeve structure 202 of the base 200, avoiding the drawback that the sliding shoe is likely to fall off in the slideway of the base 200 when using the sliding shoe structure, and there is no need for the welding process of the slideway of the base 200. The piston rod is hinged to the bottom-lifting frame 300 through a first pin shaft 500. The first arc structure 102 at the top end of the piston rod is in contact with the second arc structure 304 on the top plate 302 of the bottom-lifting frame 300, avoiding the damage that the pin shaft is bent due to excessive clearance at the hinge joint during the operation of the bottom-lifting jack 100 in the existing sleeve-type bottom-lifting jack 100.

[0051] Embodiment 2

[0052] As Figures 1 to 3 shown in the figure, in the above embodiment, further, the bottom-lifting mechanism 1 further includes a push rod 400. The push rod 400 is located on the center line of the base 200 along the length direction. One end of the push rod 400 extends out of the base 200, and the sleeve structure 202 is located above the push rod 400.

[0053] In this embodiment, the push rod 400 is located on the center line of the base 200 along the length direction, and one end of it extends out of the base 200 to connect the conveyor. The push rod 400 is used to push the conveyor on the one hand and for the movement of the hydraulic support itself on the other hand. And the sleeve structure 202 is located above the push rod 400. When the bottom-lifting jack 100 works, the cylinder body of the bottom-lifting jack 100 continuously descends along the sleeve structure 202 and forms a frictional contact with the push rod 400 without deviation. The sleeve structure 202 plays a guiding role.

[0054] Further, as Figures 4 to 6As shown, the base 200 further includes: a cross-over plate 204, a first rib plate 206, and a second rib plate 208.

[0055] The cross-over plate 204 is disposed on the base 200, opposite to the bottom-lifting jack 100, and is located above the push rod 400; the first rib plate 206 is perpendicular to the cross-over plate 204 and is connected to the cross-over plate 204; the second rib plate 208 is perpendicular to the cross-over plate 204 and is connected to the cross-over plate 204; wherein, the first rib plate 206 and the second rib plate 208 are located on the same side of the cross-over plate 204, and the sleeve structure 202 is located between the first rib plate 206 and the second rib plate 208.

[0056] In this embodiment, the cross-over plate 204 is respectively connected to the first rib plate 206 and the second rib plate 208, serving as a part of the supporting structure of the sleeve structure 202.

[0057] Further, as Figure 4 、 Figure 6 and Figure 7 shown, the base 200 further includes: a first cover plate 210 and a second cover plate 212.

[0058] The first cover plate 210 is perpendicular to the cross-over plate 204 and is connected to the cross-over plate 204; the second cover plate 212 is perpendicular to the cross-over plate 204 and is connected to the cross-over plate 204; wherein, the first cover plate 210 and the second cover plate 212 are arranged at intervals along the axial direction of the sleeve structure 202, the first cover plate 210 and the second cover plate 212 are located between the first rib plate 206 and the second rib plate 208, the first cover plate 210 is provided with a first through hole 214, the second cover plate 212 is provided with a second through hole, and the sleeve structure 202 passes through the first through hole 214 and the second through hole and is connected to the first through hole 214 and the second through hole.

[0059] In this embodiment, the sleeve structure 202 passes through the first through hole 214 and the second through hole and is connected to the first cover plate 210 and the second cover plate 212, and the first cover plate 210 and the second cover plate 212 are respectively connected to the cross-over plate 204, the first rib plate 206, and the second rib plate 208. With such an arrangement, the cross-over plate 204, the first rib plate 206, the second rib plate 208, the first cover plate 210, the second cover plate 212, and the sleeve structure 202 enclose a box-type structure, making this part of the structure of the base 200 compact and firm, and better cooperating with the operation of the bottom-lifting jack 100.

[0060] Further, as Figures 4 to 6 shown, the base 200 further includes: a first ear plate 216, a second ear plate 218, and a second pin hole 220.

[0061] The first ear plate 216 is perpendicular to the crossover plate 204 and is connected to the crossover plate 204; the second ear plate 218 is perpendicular to the crossover plate 204 and is connected to the crossover plate 204. The first ear plate 216 and the second ear plate 218 are located on the same side of the crossover plate 204, and the bottom lifting jack 100 is located between the first ear plate 216 and the second ear plate 218; the second pin hole 220 penetrates through the first ear plate 216 and the second ear plate 218.

[0062] In this embodiment, the first ear plate 216 and the second ear plate 218 are provided on the base 200, and the second pin hole 220 penetrating through the first ear plate 216 and the second ear plate 218 is provided, so that the base 200 and the bottom lifting frame 300 are connected through the second pin hole 220.

[0063] Further, as Figures 9 to 11 shown, the bottom lifting frame 300 further includes: side plates 306 and third ear plates 310.

[0064] Wherein, the side plates 306 are connected to the top plate 302 and are located on both sides of the top plate 302. The side plates 306 are provided with third pin holes 308; the third ear plates 310 are connected to the top plate 302 and are located on both sides of the top plate 302. The third ear plates 310 and the side plates 306 surround the periphery of the top plate 302, and the third ear plates 310 are provided with fourth pin holes 312.

[0065] In this embodiment, the side plates 306 and the third ear plates 310 surround the periphery of the top plate 302. The third pin holes 308 on the side plates 306 are used for the hinge connection between the bottom lifting jack 100 and the bottom lifting frame 300, and the fourth pin holes 312 on the third ear plates 310 are used for the hinge connection between the bottom lifting frame 300 and the base 200, so as to realize driving one end of the base 200 through the bottom lifting frame 300 when the bottom lifting jack 100 works and complete the lifting of the base 200.

[0066] Further, as Figure 3 and Figure 8 shown, the bottom of the bottom lifting jack 100 is provided with a third arc structure 106. Based on the working condition of the bottom lifting jack 100, the third arc structure 106 is in contact with the push rod 400.

[0067] In this embodiment, when the bottom lifting jack 100 works, the piston rod slides relative to the cylinder block, the cylinder block continuously descends, and the third arc structure 106 at the bottom of the bottom lifting hydraulic cylinder forms frictional contact with the upper surface of the push rod 400, avoiding the large impact caused by the contact.

[0068] Further, as Figure 4 and Figure 5 shown, the first ear plate 216 and the second ear plate 218 are respectively arranged in pairs.

[0069] In this embodiment, the first ear plate 216 and the second ear plate 218 are respectively arranged in pairs, making the hinge at this place more firm and reliable.

[0070] Embodiment III

[0071] As Figure 1 and Figure 10 shown, in any of the above embodiments, further, the bottom-lifting mechanism 1 further includes: a first pin shaft 500 and a second pin shaft 600.

[0072] Among them, the first pin shaft 500 passes through the first pin hole 104 and the third pin hole 308, and is used for the hinge connection between the bottom-lifting jack 100 and the bottom-lifting frame 300; the second pin shaft 600 passes through the second pin hole 220 and the fourth pin hole 312, and is used for the hinge connection between the bottom-lifting frame 300 and the base 200.

[0073] In this technical solution, the first pin shaft 500 passes through the first pin hole 104 on the bottom-lifting jack 100 and the third pin hole 308 on the bottom-lifting frame 300, realizing the hinge connection between the bottom-lifting jack 100 and the bottom-lifting frame 300. The second pin shaft 600 passes through the second pin hole 220 on the base 200 and the fourth pin hole 312 on the bottom-lifting frame 300, realizing the hinge connection between the base 200 and the bottom-lifting frame 300. With this setting, the adaptability between the base 200 and the bottom-lifting frame 300 and the bottom-lifting jack 100 is better. When the bottom-lifting jack 100 works, one end of the base 200 is driven by the bottom-lifting frame 300, thereby realizing the bottom-lifting function.

[0074] Embodiment IV

[0075] A hydraulic support provided by the fourth embodiment of the present invention includes: a top beam and a column, and the bottom-lifting mechanism 1 in any of the above embodiments.

[0076] Among them, the column is connected to the top beam and the bottom-lifting mechanism 1.

[0077] In this embodiment, since the hydraulic support includes the bottom-lifting mechanism 1 in any of the above embodiments, the hydraulic support has all the beneficial effects of the bottom-lifting mechanism 1 in any of the above embodiments, and further improves the service life of the hydraulic support. Specific Embodiment

[0079] As Figures 1 to 3 shown, in the specific embodiment, the hydraulic support proposed by the present invention includes a bottom-lifting jack 100, a base 200, a bottom-lifting frame 300, a push rod 400, a first pin shaft 500 and a second pin shaft 600.

[0080] Specifically, as Figure 1As shown, the base 200 and the base-lifting frame 300 are connected by a second pin shaft 600, and the base-lifting jack 100 and the base-lifting frame 300 are connected by a first pin shaft 500. The push rod 400 is located at the middle position of the base 200. On the one hand, it pushes the scraper conveyor. On the other hand, when the hydraulic support moves forward by itself, the bottom of the cylinder of the base-lifting jack 100 contacts the top surface of the push rod 400.

[0081] As Figure 3 shown, a sleeve structure 202 is provided on the base 200 for the trajectory operation of the base-lifting jack 100. The cylinder body of the base-lifting jack 100 moves along the inner wall of the sleeve structure 202, which has a guiding function. A first arc structure 102 is provided at the top of the base-lifting jack 100, and the first arc structure 102 makes an arc surface contact with the second arc structure 304 on the top plate 302 of the base-lifting frame 300.

[0082] As Figures 4 to 6 shown, a first rib plate 206 and a second rib plate 208 are also provided on the base 200. A first cover plate 210 and a second cover plate 212 are provided between the first rib plate 206 and the second rib plate 208. A first through hole 214 is provided on the first cover plate 210, and a second through hole is provided on the second cover plate 212. The sleeve structure 202 passes through the first through hole 214 and the second through hole, and is welded to the first cover plate 210 and the second cover plate 212, and is welded and fixed to the first rib plate 206 and the second rib plate 208.

[0083] Reinforcing ribs can also be added between the first cover plate 210 and the second cover plate 212 to make the structure more firm.

[0084] A crossover plate 204 is also provided on the base 200. The first cover plate 210, the second cover plate 212 and the crossover plate 204 are welded together. The crossover plate 204 is provided with a first ear plate 216 and a second ear plate 218. The first ear plate 216 and the second ear plate 218 are respectively arranged in pairs, with a total of 4 pieces, and are welded on the crossover plate 204. The first ear plate 216 and the second ear plate 218 are provided with second pin holes 220 for fixing the second pin shaft 600.

[0085] In addition, cover plates are added between the first ear plates 216 and between the second ear plates 218 respectively, and the structure will be more firm.

[0086] As Figure 1 , Figure 3 and Figure 8 shown, the piston rod of the base-lifting jack 100 is provided with a first arc structure 102, which makes an arc contact with the top plate 302 of the base-lifting frame 300. A first pin hole 104 is provided on the piston rod for the connection of the first pin shaft 500. A third arc structure 106 is provided at the bottom of the cylinder body, which contacts the top surface of the push rod 400 when the hydraulic support pushes the scraper conveyor or moves forward by itself.

[0087] As shown Figures 9 to 11 in FIG. 2, the bottom-lifting frame 300 is provided with two side plates 306, one top plate 302, two third ear plates 310 and a lifting ring 314. The side plate 306 is provided with a third pin hole 308 for fixing the first pin shaft 500. The top plate 302 is provided with a second arc structure 304 for making arc contact with the first arc structure 102 at the top of the bottom-lifting jack 100. The third ear plate 310 is provided with a fourth pin hole 312 for fixing the second pin shaft 600.

[0088] As shown Figures 1 to 3 in FIG. 3, during installation, first connect the bottom-lifting jack 100 and the bottom-lifting frame 300 together through the first pin shaft 500, then lift it into the sleeve structure 202 on the base 200 through the lifting ring 314 on the bottom-lifting frame 300, and then fix the bottom-lifting frame 300 by passing the second pin shaft 600 through the second pin holes 220 on the first ear plate 216 and the second ear plate 218 on the base 200, and the installation is completed.

[0089] The top of the bottom-lifting jack 100 of the hydraulic support provided by this embodiment adopts an arc structure and makes arc contact with the arc surface of the top plate 302 of the bottom-lifting frame 300. During the operation of the bottom-lifting jack 100, it is avoided that the connected first pin shaft 500 is damaged due to bending deformation. The bottom of the bottom-lifting jack 100 adopts a structure without a sliding shoe, eliminating the need for the welding process of the slideway on the base 200, and at the same time avoiding the bottom-lifting jack 100 falling out of the slideway. The sleeve structure 202 on the base 200 and the cross bridge plate 204, the first cover plate 210, the second cover plate 212, the first rib plate 206, and the second rib plate 208 form a box body and are welded into shape, with a firm structure.

[0090] In the description of the present invention, the term "a plurality of" means two or more, unless otherwise clearly defined. The terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention; the terms "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0091] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bottom-lifting mechanism, characterized in that, Comprising: A bottom-lifting jack, the bottom-lifting jack includes a piston rod, and a first arc structure and a first pin hole are provided on the piston rod. Wherein, the first arc structure is located at the end of the piston rod, the first pin hole penetrates through the piston rod along a direction perpendicular to the extension direction of the piston rod, and the first pin hole is located at one end of the piston rod close to the first arc structure; A base, the base is provided with a sleeve structure, the bottom-lifting jack is arranged in the sleeve structure, and the bottom-lifting jack can move along the axial direction of the sleeve structure; A bottom-lifting frame, the bottom-lifting frame is arranged on the base, above the sleeve structure, and a second arc structure is provided on the top plate of the bottom-lifting frame; the bottom-lifting frame includes a lifting ring; Wherein, the first arc structure is in contact with the second arc structure; A push rod, the push rod is located on the center line of the base along the length direction, one end of the push rod extends out of the base, and the sleeve structure is located above the push rod; A third arc structure is provided at the bottom of the bottom-lifting jack, and based on the working condition of the bottom-lifting jack, the third arc structure is in contact with the push rod; A cross-over plate, the cross-over plate is arranged on the base, the cross-over plate is arranged opposite to the bottom-lifting jack, and the cross-over plate is located above the push rod; A first rib plate, the first rib plate is perpendicular to the cross-over plate and is connected to the cross-over plate; A second rib plate, the second rib plate is perpendicular to the cross-over plate and is connected to the cross-over plate; Wherein, the first rib plate and the second rib plate are located on the same side of the cross-over plate, and the sleeve structure is located between the first rib plate and the second rib plate; A first cover plate, the first cover plate is perpendicular to the cross-over plate and is connected to the cross-over plate; A second cover plate, the second cover plate is perpendicular to the cross-over plate and is connected to the cross-over plate; Wherein, the first cover plate and the second cover plate are arranged at intervals along the axial direction of the sleeve structure, the first cover plate and the second cover plate are located between the first rib plate and the second rib plate, the first cover plate and the second cover plate are respectively connected to the cross-over plate, the first rib plate and the second rib plate, the first cover plate is provided with a first through hole, the second cover plate is provided with a second through hole, and the sleeve structure passes through the first through hole and the second through hole and is connected to the first through hole and the second through hole.

2. The lifting bottom mechanism according to claim 1, wherein The base further includes: A first ear plate, the first ear plate is perpendicular to the cross-over plate and is connected to the cross-over plate; A second ear plate, the second ear plate is perpendicular to the cross-over plate and is connected to the cross-over plate, the first ear plate and the second ear plate are located on the same side of the cross-over plate, and the bottom-lifting jack is located between the first ear plate and the second ear plate; A second pin hole, the second pin hole penetrates through the first ear plate and the second ear plate.

3. The bottom-lifting mechanism according to claim 2, wherein The bottom-lifting frame further includes: Side plates, the side plates are connected to the top plate, on both sides of the top plate, and the side plates are provided with third pin holes; Third ear plates, the third ear plates are connected to the top plate, on both sides of the top plate, the third ear plates and the side plates surround the periphery of the top plate, and the third ear plates are provided with fourth pin holes.

4. The bottom-lifting mechanism according to claim 2, characterized in that, The first ear plates and the second ear plates are respectively arranged in pairs.

5. The lifting bottom mechanism according to claim 3, characterized in that, Also includes: a first pin shaft, the first pin shaft passes through the first pin hole and the third pin hole, and is used for hinged connection between the bottom lifting jack and the bottom lifting frame; A second pin shaft, the second pin shaft passes through the second pin hole and the fourth pin hole, and is used for hinged connection between the bottom lifting frame and the base.

6. A hydraulic support, characterized in that, include: Top beams and columns; as well as The bottom lifting mechanism according to any one of claims 1 to 5; Wherein, the upright column is connected to the top beam and the bottom lifting mechanism.

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