Hydraulic support

Abstract

The present invention provides a hydraulic support, which includes a bottom-lifting jack. The bottom-lifting jack includes: a piston rod, one end of the piston rod is provided with a first arc structure; a cylinder body, the piston rod is arranged in the cylinder body, and the piston rod and the cylinder body can slide relative to each other; the first arc structure is located outside the cylinder body, at one end of the cylinder body, and a second arc structure is provided at the end of the cylinder body away from the first arc structure. The bottom-lifting jack provided by the present invention forms an arc surface contact between the top of the bottom-lifting jack and the connected bottom-lifting frame by arranging the first arc structure at the end of the piston rod outside the cylinder body, avoiding damage to the hinge shaft of the bottom-lifting jack and the bottom-lifting frame due to bending deformation caused by force. The second arc structure is provided at the end of the cylinder body away from the first arc structure, which can make the cylinder body better contact with the push rod. When the bottom-lifting jack works, the piston rod and the cylinder body slide relative to each other. When the bottom of the cylinder body contacts the push rod, the bottom-lifting function is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine equipment, and more particularly, to a hydraulic support. Background Art

[0002] In the prior art, the lifting jack and the lifting frame are hinged by a pin shaft. When the lifting jack works, since the top of the piston rod of the lifting jack is a flat surface and there is a gap between the piston rod and the lifting frame, the pin shaft is easily damaged due to force deformation. 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 lifting jack.

[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 lifting jack, including: a piston rod, one end of the piston rod is provided with a first arc structure; a cylinder body, the piston rod is arranged in the cylinder body, and the piston rod and the cylinder body can slide relative to each other; wherein, the first arc structure is located outside the cylinder body, at one end of the cylinder body, and a second arc structure is provided at the end of the cylinder body far from the first arc structure.

[0007] The lifting jack provided by the present invention includes a piston rod and a cylinder body. By providing a first arc structure at the end of the piston rod outside the cylinder body, an arc surface contact is formed between the top of the lifting jack and the connected lifting frame, avoiding damage to the hinge shaft of the lifting jack and the lifting frame due to force-induced bending deformation. A second arc structure is provided at the end of the cylinder body far from the first arc structure, that is, a second arc structure is provided at the bottom of the lifting jack, which can make the cylinder body better contact with the push rod. When the lifting jack works, the piston rod and the cylinder body slide relative to each other. When the bottom of the cylinder body contacts the push rod, the lifting function is realized.

[0008] Specifically, when the lifting jack works, the first arc structure always forms an arc surface contact with the lifting frame, thus avoiding the force deformation of the hinge shaft. The piston rod and the cylinder body slide relative to each other, and the cylinder body continuously descends until it frictionally contacts the upper surface of the push rod. Due to the setting of the second arc structure, the impact at the contact part is reduced.

[0009] In addition, according to the above technical solution of the lifting jack provided by the present invention, the following additional technical features may also be provided:

[0010] In the above technical solution, further, the bottom-lifting jack further includes: a first pin hole provided on the piston rod at one end of the piston rod close to the first arc structure, and the first pin hole penetrates through the piston rod along a direction perpendicular to the extension direction of the piston rod; a hose interface provided on the piston rod along a direction perpendicular to the extension direction of the piston rod at one end of the piston rod close to the first arc structure.

[0011] In this technical solution, a first pin hole is provided at one end of the piston rod close to the first arc structure and the first pin hole penetrates through the piston rod along a direction perpendicular to the extension direction of the piston rod. The piston rod can be hinged to the bottom-lifting frame through the first pin hole, so as to further enable the bottom-lifting frame to drive the base to achieve the effect of lifting the bottom. And the hose interface is arranged at a position close to the first arc structure along the extension direction of the piston rod. When the bottom-lifting jack works, the cylinder body moves axially along the base sleeve structure, and the hose interface is always exposed outside the sleeve structure, with a large manual operation space, which is convenient for the connection of the hose.

[0012] In any of the above technical solutions, further, the cross-sectional shape of the cylinder body is a ring.

[0013] In this technical solution, the cross-sectional shape of the cylinder body is a ring, that is, the cylinder body is a cylindrical structure and the piston rod is a cylindrical structure. In this way, the cylinder body of the bottom-lifting jack can always move axially inside the sleeve structure of the base, avoiding the disadvantage that the cylinder body with a sliding shoe structure is easy to fall off in the base slideway, and simplifying the structure, making the bottom-lifting jack work more smoothly.

[0014] The second aspect of the present invention provides a hydraulic support, including: a push rod and the bottom-lifting jack in any of the above technical solutions. Wherein, the push rod is arranged opposite to the second arc structure of the bottom-lifting jack.

[0015] In this technical solution, since the hydraulic support includes the bottom-lifting jack in any of the above technical solutions, the hydraulic support has all the beneficial effects of the bottom-lifting jack in any of the above technical solutions, further improving the service life of the hydraulic support. The push rod is arranged opposite to the second arc structure of the bottom-lifting jack, that is, the push rod is arranged below the bottom-lifting jack, and is used for pushing the conveyor on the one hand and for the movement of the hydraulic support itself on the other hand.

[0016] In the above technical solution, further, the hydraulic support further includes: a base; the push rod is located on the center line of the base along the length direction, and one end of the push rod extends out of the base; based on the working condition of the bottom-lifting jack, the second arc structure is in contact with the upper surface of the push rod.

[0017] In this technical solution, the hydraulic support further includes a base. The push rod is located on the center line of the base along the length direction, and one end of the push rod extends out of the base to connect to the conveyor. The bottom-lifting jack is located above the push rod. When the bottom-lifting jack works, the piston rod and the cylinder body slide relative to each other, and the cylinder body continuously descends until the second arc structure makes frictional contact with the upper surface of the push rod, avoiding the large impact caused by the contact.

[0018] In any of the above technical solutions, further, the hydraulic support further includes: a bottom-lifting frame, which is located above the base, and the bottom-lifting frame is respectively hinged to the base and the hydraulic jack.

[0019] In this technical solution, the bottom-lifting frame is hinged to the bottom-lifting jack, and at the same time, the bottom-lifting frame is hinged to the base, so that when the bottom-lifting jack works, it drives one end of the base through the bottom-lifting frame, realizing the function of lifting the bottom.

[0020] In any of the above technical solutions, further, the bottom-lifting frame includes: a top plate; side plates, which are connected to the top plate and are located on both sides of the top plate, and the side plates are provided with second pin holes; ear plates, which are connected to the top plate and are located on both sides of the top plate, and the ear plates and the side plates surround the periphery of the top plate, and the ear plates are provided with third pin holes.

[0021] In this technical solution, the bottom-lifting frame includes a top plate, side plates and ear plates. Specifically, the side plates and the ear plates surround the periphery of the top plate. The second pin holes on the side plates are used for the hinge between the bottom-lifting jack and the bottom-lifting frame, and the third pin holes on the ear plates are used for the hinge between the bottom-lifting frame and the base. Thus, when the bottom-lifting jack works, it drives one end of the base through the bottom-lifting frame to complete the lifting of the base.

[0022] In any of the above technical solutions, further, the base is provided with a sleeve structure, which is located above the push rod, and the bottom-lifting jack is located inside the sleeve structure and can move along the axial direction of the sleeve structure.

[0023] In this technical solution, the sleeve structure of the base is located above the push rod, and it can enable the bottom-lifting jack to move along the axial direction of the sleeve structure inside the sleeve structure, contacting the push rod without deviation. That is, the sleeve structure plays a guiding role when the bottom-lifting jack works, making the work of the bottom-lifting jack more stable. At the same time, it avoids the disadvantage that the sliding shoe structure is easy to fall off in the base slideway, simplifying the structure.

[0024] Specifically, when the bottom-lifting jack works, the cylinder body gradually moves downward along the axial direction of the sleeve structure until the second arc structure at the bottom of the cylinder body contacts the push rod, and the cylinder body and the piston rod continue to slide relative to each other to lift one end of the base.

[0025] In any of the above technical solutions, further, a third arc structure is provided on the lower surface of the top plate, and the third arc structure is in contact with the first arc structure.

[0026] In this technical solution, a third arc structure is arranged on the lower surface of the top plate, and the third arc structure contacts the first arc structure, thereby preventing the hinge shaft of the bottom lifting jack and the bottom lifting mechanism from being bent and deformed due to force and being damaged, thereby increasing the service life of the hydraulic support.

[0027] In any of the above technical solutions, the hydraulic support further includes: a first pin shaft, the first pin shaft passes through the first pin hole and the second pin hole, and is used to hinge the bottom lifting jack and the bottom lifting frame; a second pin shaft, the second pin shaft passes through the third pin hole, and is used to hinge the bottom lifting frame and the base.

[0028] In this technical solution, the first pin shaft passes through the first pin hole on the bottom lifting jack and the second pin hole on the bottom lifting frame, thereby realizing the hinge connection between the bottom lifting jack and the bottom lifting frame. The second pin shaft passes through the third pin hole on the bottom lifting frame and the base, thereby realizing the hinge connection between the bottom lifting frame and the base. In this way, when the bottom lifting jack is working, both the base and the bottom lifting frame can follow the movement, thereby realizing the bottom lifting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 It is a structural schematic diagram of a bottom lifting jack according to an embodiment of the present invention;

[0031] Figure 2 A top view of a partial structure of a hydraulic support according to an embodiment of the present invention;

[0032] Figure 3 for Figure 2 A cross-sectional view of the embodiment shown along the AA line;

[0033] Figure 4 A schematic structural diagram of a bottom lifting frame according to an embodiment of the present invention;

[0034] Figure 5 for Figure 4 A cross-sectional view of the embodiment shown along line BB.

[0035] in, Figures 1 to 5 The corresponding relationship between the reference numerals and the component names is as follows:

[0036] 100 Floor jack, 102 piston rod, 104 cylinder block, 1022 first arc structure, 1024 first pin hole, 1026 hose connection, 1028 second arc structure, 200 push rod, 300 base, 400 floor lifting frame, 402 top plate, 4022 third arc structure, 404 side plate, 4042 second pin hole, 406 ear plate, 4062 third pin hole, 500 first pin shaft. Detailed implementation manners

[0037] 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 implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0038] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also 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.

[0039] The following refers to Figures 1 to 5 to describe the floor jack 100 and the hydraulic support provided according to some embodiments of the present invention.

[0040] Embodiment 1

[0041] As Figure 1 shown, a floor jack 100 proposed in the first embodiment of the present invention includes: a piston rod 102 and a cylinder block 104.

[0042] Wherein, one end of the piston rod 102 is provided with a first arc structure 1022; the piston rod 102 is disposed in the cylinder block 104, and the piston rod 102 and the cylinder block 104 can slide relative to each other; the first arc structure 1022 is located outside the cylinder block 104, at one end of the cylinder block 104, and a second arc structure 1028 is provided at the end of the cylinder block 104 away from the first arc structure 1022.

[0043] The bottom-lifting jack 100 provided in this embodiment includes a piston rod 102 and a cylinder block 104. By providing a first arc structure 1022 at the end of the piston rod 102 outside the cylinder block 104, an arc surface contact is formed between the top of the bottom-lifting jack 100 and the connected bottom-lifting frame 400, avoiding damage to the hinge shaft of the bottom-lifting jack 100 and the bottom-lifting frame 400 due to bending deformation caused by force. A second arc structure 1028 is provided at one end of the cylinder block 104 away from the first arc structure 1022, that is, a second arc structure 1028 is provided at the bottom of the bottom-lifting jack 100, which can make the cylinder block 104 better contact with the push rod 200. When the bottom-lifting jack 100 works, the piston rod 102 and the cylinder block 104 slide relative to each other. When the bottom of the cylinder block 104 contacts the push rod 200, the bottom-lifting function is realized.

[0044] Specifically, when the bottom-lifting jack 100 works, the first arc structure 1022 always forms an arc surface contact with the bottom-lifting frame 400, thus avoiding the deformation of the hinge shaft due to force. The piston rod 102 and the cylinder block 104 slide relative to each other, and the cylinder block 104 continuously descends until it frictionally contacts the upper surface of the push rod 200. Due to the setting of the second arc structure 1028, the impact at the contact part is reduced.

[0045] Embodiment Two

[0046] As Figure 1 shown, in the above embodiment, further, the bottom-lifting jack 100 further includes a first pin hole 1024 and a hose interface 1026.

[0047] Among them, the first pin hole 1024 is provided on the piston rod 102, at one end of the piston rod 102 close to the first arc structure 1022, and the first pin hole 1024 penetrates through the piston rod 102 along a direction perpendicular to the extension direction of the piston rod 102; the hose interface 1026 is provided on the piston rod 102 along a direction perpendicular to the extension direction of the piston rod 102, at one end of the piston rod 102 close to the first arc structure 1022.

[0048] As Figures 1 to 3 shown, in this embodiment, a first pin hole 1024 is provided at one end of the piston rod 102 close to the first arc structure 1022, and the first pin hole 1024 penetrates through the piston rod 102 along a direction perpendicular to the extension direction of the piston rod 102. The piston rod 102 can be hinged to the bottom-lifting frame 400 through the first pin hole 1024, so as to further enable the bottom-lifting frame 400 to drive the base 300 to achieve the effect of bottom lifting. And the hose interface 1026 is arranged at a position close to the first arc structure 1022 along the extension direction of the piston rod 102. When the bottom-lifting jack 100 works, the cylinder block 104 moves axially along the sleeve structure of the base 300, and the hose interface 1026 is always exposed outside the sleeve structure, with a large manual operation space, which is convenient for the connection of the hose.

[0049] Furthermore, the cross-sectional shape of the cylinder block 104 is an annulus.

[0050] In this embodiment, the cross-sectional shape of the cylinder block 104 is an annulus, that is, the cylinder block 104 is a cylindrical structure, and the piston rod 102 is a cylindrical structure. This can enable the cylinder block 104 of the bottom-lifting jack 100 to always move axially inside the sleeve structure of the base 300, avoiding the drawback that the cylinder block 104 with a sliding shoe structure is prone to fall off in the slideway of the base 300, and simplifies the structure, making the bottom-lifting jack 100 work more smoothly.

[0051] Embodiment Three

[0052] As Figures 1 to 3 shown, a hydraulic support provided by the third embodiment of the present invention includes a push rod 200 and the bottom-lifting jack 100 in any of the above embodiments. Wherein, the push rod 200 is disposed opposite to the second arc structure 1028 of the bottom-lifting jack 100.

[0053] In this embodiment, since the hydraulic support includes the bottom-lifting jack 100 in any of the above technical solutions, the bottom-lifting mechanism has all the beneficial effects of the bottom-lifting jack 100 in any of the above technical solutions, further improving the service life of the hydraulic support. The push rod 200 is disposed opposite to the second arc structure 1028 of the bottom-lifting jack 100, that is, the push rod 200 is disposed below the bottom-lifting jack 100, and is used for pushing the conveyor on the one hand and for the movement of the hydraulic support itself on the other hand.

[0054] Embodiment Four

[0055] As Figures 1 to 3 shown, in the above embodiment, further, the hydraulic support further includes a base 300. The push rod 200 is located on the center line of the base 300 along the length direction, and one end of the push rod 200 extends out of the base 300; based on the operation of the bottom-lifting jack 100, the second arc structure 1028 is in contact with the push rod 200.

[0056] In this embodiment, the hydraulic support further includes a base 300. The push rod 200 is located on the center line of the base 300 along the length direction, and one end thereof extends out of the base 300 to connect to the conveyor. The bottom-lifting jack 100 is located above the push rod 200. When the bottom-lifting jack 100 operates, the piston rod 102 slides relative to the cylinder block 104, and the cylinder block 104 continuously descends until the second arc structure 1028 forms frictional contact with the upper surface of the push rod 200, avoiding the large impact caused by the contact.

[0057] Further, the hydraulic support further includes a floor lifting frame 400. The floor lifting frame 400 is located above the base 300, and the floor lifting frame 400 is hinged to the base 300 and the hydraulic jack respectively.

[0058] In this embodiment, the floor lifting frame 400 is hinged to the floor lifting jack 100, and at the same time, the floor lifting frame 400 is hinged to the base 300, so that when the floor lifting jack 100 works, one end of the base 300 is driven by the floor lifting frame 400, realizing the function of lifting the floor.

[0059] Further, as Figure 4 and Figure 5 shown, the floor lifting frame 400 includes a top plate 402, side plates 404 and ear plates 406. The side plates 404 are connected to the top plate 402 and are located on both sides of the top plate 402. The side plates 404 are provided with second pin holes 4042; the ear plates 406 are connected to the top plate 402 and are located on both sides of the top plate 402. The ear plates 406 and the side plates 404 surround the circumference of the top plate 402, and the ear plates 406 are provided with third pin holes 4062.

[0060] In this embodiment, the side plates 404 and the ear plates 406 surround the circumference of the top plate 402. The second pin holes 4042 on the side plates 404 are used for the hinge connection between the floor lifting jack 100 and the floor lifting frame 400, and the third pin holes 4062 on the ear plates 406 are used for the hinge connection between the floor lifting frame 400 and the base 300, so that when the floor lifting jack 100 works, one end of the base 300 is driven by the floor lifting frame 400 to complete the lifting of the base 300.

[0061] Further, the base 300 is provided with a sleeve structure. The sleeve structure is located above the push rod 200, and the floor lifting jack 100 is located inside the sleeve structure and can move along the axial direction of the sleeve structure.

[0062] In this embodiment, the sleeve structure of the base 300 is located above the push rod 200 and can enable the floor lifting jack 100 to move along the axial direction of the sleeve structure inside the sleeve structure. That is, the sleeve structure plays a guiding role when the floor lifting jack 100 works, so that the work of the floor lifting jack 100 is more stable, avoiding the drawback that the sliding shoe structure is easy to fall off in the slideway of the base 300 and simplifying the structure. Specifically, when the floor lifting jack 100 works, the cylinder block 104 gradually moves downward along the axial direction of the sleeve structure until the second arc structure 1028 at the bottom of the cylinder block 104 contacts the push rod 200, and the cylinder block 104 and the piston rod 102 continue to slide relative to each other to lift one end of the base 300.

[0063] Further, as Figure 5 shown, the lower surface of the top plate 402 is provided with a third arc structure 4022, and the third arc structure 4022 contacts the first arc structure 1022.

[0064] In this embodiment, the third arc structure 4022 on the lower surface of the top plate 402 is in contact with the first arc structure 1022 at the top end of the floor lifting jack 100, avoiding bending deformation and damage to the hinge shaft of the floor lifting jack 100 and the floor lifting mechanism, thereby improving the service life of the hydraulic support.

[0065] Embodiment Five

[0066] As Figure 3 shown, in any of the above embodiments, further, the hydraulic support further includes a first pin shaft 500 and a second pin shaft.

[0067] Among them, the first pin shaft 500 passes through the first pin hole 1024 and the second pin hole 4042 for hinging the floor lifting jack 100 and the floor lifting frame 400; the second pin shaft passes through the third pin hole 4062 for hinging the floor lifting frame 400 and the base 300.

[0068] In this embodiment, the first pin shaft 500 passes through the first pin hole 1024 on the floor lifting jack 100 and the second pin hole 4042 on the floor lifting frame 400, realizing the hinge connection between the floor lifting jack 100 and the floor lifting frame 400. The second pin shaft passes through the third pin hole 4062 on the floor lifting frame 400 and the base 300, realizing the hinge connection between the floor lifting frame 400 and the base 300. With such a setting, when the floor lifting jack 100 works, both the base 300 and the floor lifting frame 400 can follow, thereby realizing the floor lifting function. Specific Embodiment

[0070] As Figure 2 and Figure 3 shown, in a specific embodiment, the hydraulic support proposed by the present invention includes a floor lifting jack 100, a floor lifting frame 400, a base 300, a push rod 200, a first pin shaft 500 and a second pin shaft.

[0071] Specifically, the floor lifting jack is located at the middle position of the base 300, and the upper part is connected to the floor lifting frame 400. The push rod 200 is located below the floor lifting jack 100 at the middle position of the base 300. When the piston rod 102 of the floor lifting jack 100 extends, the bottom of the cylinder is in frictional contact with the top surface of the push rod 200.

[0072] As Figure 1As shown in the figure, a first arc structure 1022 is provided at the top of the bottom-lifting jack 100. A first pin hole 1024 is provided on the piston rod 102 near the first arc structure 1022. The first pin hole 1024 runs through the extending direction of the piston rod 102 and is used for the connection space of the first pin shaft 500. A second arc structure 1028 is provided at the bottom of the cylinder block 104 of the bottom-lifting jack 100. When the hydraulic support runs forward by itself, the second arc structure 1028 contacts the upper surface of the push rod 200. The hose interface 1026 is located below the first pin hole 1024 and above the sleeve structure of the base 300, where there is a large manual operation space, which is convenient for installation and maintenance.

[0073] As Figure 4 and Figure 5 As shown in the figure, two side plates 404, one top plate 402, two ear plates 406 and a lifting ring are provided on the bottom-lifting frame 400. Second pin holes 4042 are provided on the side plates 404 and are used for connecting and fixing the first pin shaft 500. A third arc structure 4022 is provided on the lower surface of the top plate 402 and is used for contacting the first arc structure 1022 of the bottom-lifting jack 100. Third pin holes 4062 are provided on the ear plates 406, and the base 300 and the bottom-lifting frame 400 are connected by a second pin shaft.

[0074] For the hydraulic support proposed by the present invention, by adopting the first arc structure 1022 at the top of the bottom-lifting jack 100 and contacting the arc surface of the top plate 402 of the bottom-lifting frame 400, the first pin shaft 500 connected during the working process of the bottom-lifting jack 100 is prevented from being bent and deformed and damaged. In addition, both the top and bottom of the bottom-lifting jack 100 are arc structures, which can well contact the adjacent components. The cylinder block 104 of the bottom-lifting jack 100 and the base 300 adopt a sleeve structure, so that the bottom-lifting jack 100 always moves in the sleeve on the base 300 during the working process, avoiding the drawback that the sliding shoe is easily detached from the slideway of the base 300 when adopting a sliding shoe structure. The hose interface 1026 adopts a user-friendly design and is located at the upper part of the bottom-lifting jack 100 without interfering with the sleeve on the base 300, which is convenient for manual operation.

[0075] In the description of the present invention, the term "a plurality of" means two or more, unless otherwise clearly defined. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as a limitation on the present invention; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed 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.

[0076] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means 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 instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0077] 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 can have various modifications and changes. Any modification, equivalent replacement, improvement, 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 hydraulic support, characterized in that, Comprising: Push rod; Bottom-lifting jack, comprising: a piston rod, one end of the piston rod is provided with a first arc structure; a cylinder block, the piston rod is arranged in the cylinder block, and the piston rod and the cylinder block can slide relative to each other; wherein, the first arc structure is located outside the cylinder block, at one end of the cylinder block, and a second arc structure is provided at one end of the cylinder block away from the first arc structure; a first pin hole, the first pin hole is arranged on the piston rod, at one end of the piston rod close to the first arc structure, and the first pin hole penetrates through the piston rod along a direction perpendicular to the extension direction of the piston rod; when the bottom-lifting jack is working, the first arc structure always forms an arc surface contact with the bottom-lifting frame; a hose interface, the hose interface is arranged on the piston rod along a direction perpendicular to the extension direction of the piston rod, at one end of the piston rod close to the first arc structure; wherein, the push rod is arranged opposite to the second arc structure of the bottom-lifting jack; Base; Wherein, the push rod is located on the center line of the base along the length direction, and one end of the push rod extends out of the base; based on the working condition of the bottom-lifting jack, the second arc structure is in contact with the upper surface of the push rod; Bottom-lifting frame, the bottom-lifting frame is located above the base, and the bottom-lifting frame is respectively hinged to the base and the bottom-lifting jack; The bottom-lifting frame includes: Top plate; 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 second pin holes; Ear plates, the ear plates are connected to the top plate, on both sides of the top plate, and the ear plates and the side plates surround the periphery of the top plate, and the ear plates are provided with third pin holes; A third arc structure is provided on the lower surface of the top plate, and the third arc structure is in contact with the first arc structure; The hydraulic support further includes: A first pin shaft, the first pin shaft passes through the first pin hole and the second pin hole for hinging the bottom-lifting jack to the bottom-lifting frame; A second pin shaft, the second pin shaft passes through the third pin hole for hinging the bottom-lifting frame to the base.

2. The hydraulic support according to claim 1, characterized in that, The cross-sectional shape of the cylinder block is a ring.

3. The hydraulic support according to claim 1 or 2, characterized in that, The base is provided with a sleeve structure, the sleeve structure is located above the push rod, and the bottom-lifting jack is located inside the sleeve structure and can move along the axial direction of the sleeve structure.

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