Hydraulic cylinder

Abstract

The invention is suitable for the technical field of hydraulic cylinders, and provides a hydraulic cylinder which comprises a cylinder body assembly, the bottom of the cylinder body assembly is fixedly connected with a base assembly, and the cylinder body assembly comprises a cylinder body part, a telescopic part in sliding fit with the interior of the cylinder body part and a top cover part fixedly connected to the top of the cylinder body part; the base assembly comprises a base part fixedly connected to the bottom of the cylinder body part, and a buffer part is arranged in the base part in a sliding fit mode. The problems that the impact force of external hydraulic substances is too large, and the internal pipe body structure of the whole hydraulic cylinder is damaged are solved, certain force release can be conducted on the external hydraulic substances, the situation that the impact force of the external hydraulic substances is too large, and the internal pipe body structure of the whole hydraulic cylinder is damaged is avoided, and the service life of the hydraulic cylinder is prolonged. And the service time of the whole hydraulic cylinder is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic cylinders, and more particularly to a hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is an actuator of hydraulic equipment. When designing it, it is necessary not only to consider the transmission force (torque) and piston stroke requirements by designing the cylinder size (inner diameter and length); at the same time, the hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion. It has the characteristics of simple structure and reliable operation.

[0003] At present, the hydraulic cylinders on the market have the following technical problems when they are used to input and output external hydraulic substances:

[0004] When the existing hydraulic cylinder is used to input and output external hydraulic materials, due to the presence of a certain force release structure in the internal structure of the hydraulic cylinder, the impact force of the external hydraulic materials is too large during use, causing damage to the internal pipe structure of the entire hydraulic cylinder, thereby reducing the service life of the entire hydraulic cylinder. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a hydraulic cylinder that can, through the slow upward sliding process of a buffer part inside a base part, release a certain amount of force on external hydraulic material entering the interior of the hydraulic cylinder barrel, thereby preventing the external hydraulic material from having excessive impact force when entering the hydraulic cylinder and causing damage to the internal tube structure of the entire hydraulic cylinder, thereby increasing the service life of the entire hydraulic cylinder.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A hydraulic cylinder comprises a cylinder assembly, wherein a base assembly is fixedly connected to the bottom of the cylinder assembly, and the cylinder assembly comprises a cylinder part, a telescopic part slidingly fitted inside the cylinder part, and a top cover part fixedly connected to the top of the cylinder part.

[0008] The base assembly comprises a base member fixedly connected to the bottom of the cylinder member, and a buffer member is slidably matched inside the base member.

[0009] The base member includes a fixed base, an L-shaped flow cavity is provided inside the fixed base, a guide tube connected to the L-shaped flow cavity is provided on the top of the fixed base, a first flow cover is fixed on the top of the flow guide tube, a plurality of annularly distributed first flow grooves are provided at intervals through the circumferential side of the first flow cover, a sealing annular rail is fixed on the top of the first flow cover, a plurality of vertical grooves are provided on the inner wall of the flow guide tube below the first flow cover, a limiting groove is provided on the inner wall of the vertical groove, and a plurality of first springs are fixed on the inner wall of the flow guide tube at the bottom of the limiting groove.

[0010] The present invention is further configured as follows: the buffer component includes a sliding tube that is slidably fitted inside the guide tube, a plurality of vertical slide plates that are slidably fitted with a plurality of vertical grooves are fixed to the outer peripheral side surface of the sliding tube, a resistance rod that is slidably fitted with the limiting grooves is fixed to one side of the vertical slide plate near the bottom, a second flow cover that is slidably fitted inside the first flow cover is fixed to the top of the sliding tube, a plurality of annularly distributed second flow grooves are provided at intervals through the peripheral side surface of the second flow cover, a sealing cover cylinder is fixed to the top of the second flow cover, a sealing ring groove that is slidably fitted on the sealing ring rail is provided at the bottom of the sealing cover cylinder, and the top of the first spring is fixedly connected to the bottom of the vertical slide plate.

[0011] An expansion cover is fixed on the inner wall of the sliding tube.

[0012] The present invention is further configured as follows: a tube body connector connected to the L-shaped flow cavity is provided on the outer peripheral side of the fixed base, a first conical flow tube connected to the tube body connector is provided inside the L-shaped flow cavity, a second conical flow tube distributed vertically is provided on the peripheral side of the first conical flow tube, and one end of the first conical flow tube is located inside the L-shaped flow cavity and is connected to an inclined conduit.

[0013] A rectangular cavity connected to the L-shaped circulation cavity is opened inside the fixed base, and inclined plates are fixed to the two inner side walls of the rectangular cavity, and a rotating shaft is rotatably matched between the two inclined plates. A first inclined plate is fixed to the side surface of the rotating shaft, and a second inclined plate is fixed to the side surface of the rotating shaft. The second inclined plate is fixed with levers near the ends on both sides, a rectangular plate is fixed to one side of the first inclined plate, and a speaker cover is fixed to one side of the rectangular plate.

[0014] An oblique plate is fixed inside the rectangular cavity, and an arc spring is fixed between the oblique plate and the rotating shaft.

[0015] The present invention is further configured as follows: a first circular hole communicating with the rectangular cavity is formed through the top of the fixed base, and a first sealing groove is formed at the top of the rectangular cavity below the first circular hole.

[0016] A first sealing rail is fixed on the top of the fixed base, and a plurality of first fixing holes are formed through the fixed base.

[0017] The cylinder body comprises a hydraulic cylinder barrel, a second sealing groove engaging with a first sealing rail is provided at the bottom of the hydraulic cylinder barrel, a plurality of second fixing holes are provided at the bottom of the hydraulic cylinder barrel, and the second fixing holes are fixedly connected with the first fixing holes by bolts.

[0018] The present invention is further configured as follows: a second circular hole extending upward is opened at the bottom of the hydraulic cylinder barrel, a guide groove is opened through the inner wall of the second circular hole, a guide column tube is slidably fitted inside the second circular hole, a guide rail slidably fitted inside the guide groove is fixed to the outer wall of the guide column tube, a third sealing rail is fixed to the top of the guide column tube, and a sealing annular plate is fixed to the bottom of the guide column tube.

[0019] The present invention is further configured as follows: a fourth sealing rail matched with the first sealing groove is fixed on the top of the sealing annular plate, and a third sealing groove matched with the third sealing rail is opened on the top of the second circular hole.

[0020] Two symmetrical rectangular support plates are fixed on the inner wall of the hydraulic cylinder barrel above the second circular hole, a top plate is fixed on the top of the guide rail, a second spring is fixed on the top of the top plate, and the bottom of one of the rectangular support plates is fixedly connected to the top of the second spring.

[0021] Symmetrical baffles on both sides are fixed to the bottom of the sealing annular plate. A transverse groove is formed through one side of the two baffles. The transverse groove is slidably matched with the shifting rod.

[0022] The present invention is further configured as follows: a base ring is fixed to the outer peripheral side surface of the hydraulic cylinder barrel near the top, a fourth sealing groove is opened through the top of the base ring, and a plurality of third fixing holes are opened on the top of the base ring.

[0023] The top cover member comprises a sealing cover which is sleeved and fitted on the top of the hydraulic cylinder barrel, and a sliding circular hole is penetrated through the top of the sealing cover.

[0024] A plurality of fourth fixing holes are formed through the top of the sealing cover, a fifth sealing rail matched with the fourth sealing groove is fixed to the top of the sealing cover, and the fourth fixing holes are fixedly connected with the third fixing holes by bolts.

[0025] The present invention is further configured as follows: the telescopic member comprises a hydraulic piston slidably matched inside the hydraulic cylinder, and a hydraulic piston rod slidably matched with the sliding circular hole is fixed to one end of the hydraulic piston.

[0026] An annular cavity is provided on the top of the hydraulic cylinder, and oil-absorbing cotton is arranged inside the annular cavity.

[0027] The present invention is further configured as follows: two sliding abutment rods extending outward are slidingly fitted through the annular cavity, and arc-shaped extrusion plates are fixed on the opposite end faces of the two sliding abutment rods located inside the annular cavity, and two symmetrical third springs are fixed between the arc-shaped extrusion plates and the annular cavity.

[0028] The inner wall of the hydraulic cylinder is provided with a plurality of oil leakage grooves which are connected with the annular cavity.

[0029] The present invention is further configured as follows: two symmetrical first sliding grooves are opened on the peripheral side of the hydraulic piston rod, two trapezoidal inclined grooves are opened on the peripheral side of the hydraulic piston rod and are respectively connected to the two first sliding grooves, and two second sliding grooves are opened on the peripheral side of the hydraulic piston rod and are respectively connected to the two trapezoidal inclined grooves, and the depth of the first sliding groove is greater than the depth of the second sliding groove.

[0030] The sliding abutment rod is arranged in a dome shape relative to the other end surface, and the sliding abutment rod is slidably matched with the first sliding groove, the trapezoidal inclined groove and the second sliding groove in sequence relative to the other end surface.

[0031] The advantages of the present invention are as follows: 1. The present invention uses the sliding tube and the second flow cover to slowly slide upward in the guide tube and the first flow cover in turn, so that the second flow groove will gradually produce a misaligned state with the first flow groove, driving the external hydraulic material to gradually enter the cavity between the first flow cover and the second flow cover through the second flow groove, and finally enter the interior of the hydraulic cylinder through the first flow groove, thereby driving the buffer part to slowly slide upward inside the base part, thereby completing the extension process of the telescopic part inside the cylinder body part. During the whole process, the external hydraulic material entering the hydraulic cylinder barrel is relieved to a certain extent through the slow upward sliding process of the buffer part inside the base part, thereby avoiding excessive impact force of the external hydraulic material when entering the hydraulic cylinder, causing damage to the internal pipe structure of the entire hydraulic cylinder, and improving the service life of the entire hydraulic pressure.

[0032] 2. The present invention generates a liquid pushing force on the horn cover through part of the external hydraulic material, thereby driving the rotating shaft to rotate, so that the levers fixed on the two side surfaces of the second inclined plate respectively slide synchronously inside the two transverse grooves, thereby combining with the elastic force of the arc spring to provide a slowly moving upward force for the guide column tube slidingly fitted in the first circular hole and the second circular hole, driving the third sealing rail to gradually snap fit into the interior of the third sealing groove, and thereby synchronously driving the fourth sealing rail to gradually approach each other toward the interior of the first sealing groove, until the third sealing rail and the fourth sealing rail are snap fit with the third sealing groove and the first sealing groove in turn, thereby ensuring that when the entire hydraulic cylinder is extending, its guide column tube is synchronously in a relatively sealed state, so as to facilitate the subsequent extraction, absorption and contraction process of the hydraulic material inside the hydraulic cylinder barrel, thereby facilitating the subsequent contraction action of the hydraulic cylinder.

[0033] 3. The present invention uses the reciprocating sliding process of the telescopic part inside the hydraulic cylinder to make the sliding contact rod slide inside the first slide groove, the trapezoidal inclined groove and the second slide groove which are interconnected, thereby generating a height difference. In combination with the elastic force of the third spring fixedly connected between the arc extrusion plate and the annular cavity, the oil-absorbing cotton placed in the annular cavity is repeatedly squeezed, so that the lubricating material adsorbed inside the oil-absorbing cotton can be squeezed out under the repeated squeezing action of the arc extrusion plate, thereby realizing an intermittent discharging process in the whole process, avoiding repeated addition of lubricating material to the entire hydraulic cylinder, bringing certain convenience to the user and improving the use efficiency of the hydraulic piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The figure is a schematic structural diagram of a hydraulic cylinder of the present invention.

[0035] Figure 2 It is a structural schematic diagram of the cylinder assembly of the present invention.

[0036] Figure 3 It is a structural schematic diagram of the base assembly of the present invention.

[0037] Figure 4 It is a schematic diagram of the cross-sectional structure of the cylinder block of the present invention.

[0038] Figure 5 It is a front view of the cross-sectional structure of the cylinder block of the present invention.

[0039] Figure 6 It is a structural schematic diagram of the cylinder body of the present invention.

[0040] Figure 7 It is a side view of the cylinder body of the present invention.

[0041] Figure 8 It is a structural schematic diagram of the telescopic member of the present invention.

[0042] Fig. 9 It is a schematic diagram of the cross-sectional structure of the telescopic member of the present invention.

[0043] Fig.10 It is a schematic structural diagram of the top cover member of the present invention.

[0044] Fig.11 It is a schematic structural diagram of the base member of the present invention.

[0045] Fig.12 It is a schematic diagram of the cross-sectional structure of the base member of the present invention.

[0046] Fig.13 For the present invention Fig.12 Schematic diagram of the enlarged structure at point A in the middle.

[0047] Fig.14 For the present invention Fig.12 Schematic diagram of the enlarged structure at point B in the middle.

[0048] Fig.15 It is a front view of the cross-sectional structure of the base member of the present invention.

[0049] Fig.16 It is a schematic structural diagram of the buffer component of the present invention.

[0050] Fig.17 It is a schematic diagram of the cross-sectional structure of the buffer component of the present invention.

[0051] In the figure: 1, cylinder assembly; 2, base assembly; 3, cylinder member; 4, telescopic member; 5, top cover member; 6, base member; 7, buffer member; 301, hydraulic cylinder; 302, second sealing groove; 303, second fixing hole; 304, second circular hole; 305, limit groove; 306, guide column tube; 307, guide rail; 308, third sealing rail; 309, sealing circular ring plate; 310, fourth sealing rail; 311, third sealing groove; 312, rectangular support plate; 313, top plate ; 314, second spring; 315, side baffle; 316, transverse groove; 317, base ring; 318, fourth sealing groove; 319, third fixing hole; 320, annular cavity; 321, oil-absorbing cotton; 322, sliding resistance rod; 323, arc-shaped extrusion plate; 324, third spring; 325, oil leakage groove; 401, hydraulic piston; 402, hydraulic piston rod; 403, first slide groove; 404, trapezoidal inclined groove; 405, second slide groove; 501, sealing cover; 502, Sliding circular hole; 503, fourth fixing hole; 504, fifth sealing rail; 601, fixed base; 602, L-shaped circulation cavity; 603, guide tube; 604, first circulation cover; 605, first circulation groove; 606, sealing annular rail; 607, vertical groove; 608, limit groove; 609, first spring; 610, pipe body connector; 611, first conical circulation pipe; 612, second conical circulation pipe; 613, oblique guide tube; 614, rectangular cavity; 615, oblique plate; 616, rotating shaft; 617, first inclined plate; 618, second inclined plate; 619, shift rod; 620, rectangular plate; 621, horn cover; 622, arc spring; 623, first circular hole; 624, first sealing groove; 625, first sealing rail; 626, first fixing hole; 701, sliding tube; 702, vertical sliding plate; 703, abutting rod; 704, second circulation cover; 705, second circulation groove; 706, sealing cover cylinder; 707, sealing ring groove; 708, expansion cover. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0053] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0054] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0055] For example, see Figure 1-17 , the present invention provides the following technical solutions:

[0056] A hydraulic cylinder, specifically, comprises a cylinder assembly 1, wherein a base assembly 2 is fixedly connected to the bottom of the cylinder assembly 1, and is characterized in that: the cylinder assembly 1 comprises a cylinder member 3, a telescopic member 4 slidably fitted inside the cylinder member 3, and a top cover member 5 fixedly connected to the top of the cylinder member 3; the base assembly 2 comprises a base member 6 fixedly connected to the bottom of the cylinder member 3, wherein a buffer member 7 is slidably fitted inside the base member 6; the base member 6 comprises a fixed base 601, wherein an L-shaped flow cavity 602 is provided inside the fixed base 601, a guide tube 603 connected to the L-shaped flow cavity 602 is provided at the top of the fixed base 601, a first flow cover 604 is fixedly provided at the top of the guide tube 603, a plurality of annularly distributed first flow grooves 605 are provided at intervals on the circumferential side surface of the first flow cover 604, a sealing annular rail 606 is fixedly provided on the top of the first flow cover 604, a plurality of vertical grooves 607 are provided on the inner wall of the guide tube 603 below the first flow cover 604, and a plurality of vertical grooves 607 are provided on the vertical grooves 607. A limiting groove 608 is provided on the inner wall of 07, and a plurality of first springs 609 are fixed to the bottom of the inner wall of the guide tube 603 located in the limiting groove 608; the buffer member 7 comprises a sliding tube 701 which is slidably fitted in the guide tube 603, a plurality of vertical slide plates 702 which are slidably fitted with the plurality of vertical grooves 607 are fixed to the outer peripheral side of the sliding tube 701, and a resisting rod 703 which is slidably fitted with the limiting groove 608 is fixed to one side of the vertical slide plate 702 near the bottom, a second flow cover 704 which is slidably fitted in the first flow cover 604 is fixed to the top of the sliding tube 701, and a plurality of annularly distributed second flow grooves 705 are provided at intervals through the peripheral side of the second flow cover 704, a sealing cover cylinder 706 is fixed to the top of the second flow cover 704, and a sealing ring groove 707 which is slidably fitted on the sealing ring rail 606 is provided at the bottom of the sealing cover cylinder 706, and the top of the first spring 609 is fixedly connected to the bottom of the vertical slide plate 702; an expansion cover 708 is fixed to the inner wall of the sliding tube 701;

[0057] Further, the outer peripheral side of the fixed base 601 is connected to a tube body connector 610 connected to the L-shaped circulation cavity 602, the L-shaped circulation cavity 602 is connected to a first conical circulation tube 611 connected to the tube body connector 610, the first conical circulation tube 611 is connected to a second conical circulation tube 612 distributed vertically on the peripheral side, and one end of the first conical circulation tube 611 is located inside the L-shaped circulation cavity 602 and is connected to an inclined conduit 613; a rectangular cavity 614 connected to the L-shaped circulation cavity 602 is opened inside the fixed base 601, and oblique plates 615 are fixed to the two inner side walls of the rectangular cavity 614, and a rotating shaft 616 is rotatably matched between the two oblique plates 615, and the rotating shaft 616 A first inclined plate 617 is fixed to the side surface, a second inclined plate 618 is fixed to the side surface of the rotating shaft 616, and levers 619 are fixed to the ends of the two opposite side surfaces of the second inclined plate 618. A rectangular plate 620 is fixed to one side of the first inclined plate 617, and a speaker cover 621 is fixed to one side of the rectangular plate 620; an inclined plate 615 is fixed inside the rectangular cavity 614, and an arc spring 622 is fixed between the inclined plate 615 and the rotating shaft 616; a first circular hole 623 connected to the rectangular cavity 614 is opened through the top of the fixed base 601, and a first sealing groove 624 is opened at the top of the rectangular cavity 614 below the first circular hole 623; a first sealing rail 625 is fixed to the top of the fixed base 601, and a A plurality of first fixing holes 626; the cylinder body 3 includes a hydraulic cylinder 301, a second sealing groove 302 which is engaged with the first sealing rail 625 is provided at the bottom of the hydraulic cylinder 301, a plurality of second fixing holes 303 are provided at the bottom of the hydraulic cylinder 301, and the first fixing hole 626 is fixedly connected with the second fixing hole 303 by bolts; a second circular hole 304 extending upward is provided at the bottom of the hydraulic cylinder 301, a guide groove 305 is provided through the inner wall of the second circular hole 304, a guide column tube 306 is slidably engaged inside the second circular hole 304, a guide rail 307 which is slidably engaged inside the guide groove 305 is fixed to the outer wall of the guide column tube 306, a third sealing rail 308 is fixed to the top of the guide column tube 306, and a third sealing rail 308 is fixed to the bottom of the guide column tube 306 A sealing annular plate 309 is fixed; a fourth sealing rail 310 adapted to the first sealing groove 624 is fixed on the top of the sealing annular plate 309, and a third sealing groove 311 adapted to the third sealing rail 308 is opened in the top of the second circular hole 304; two symmetrical rectangular support plates 312 are fixed on the inner wall of the hydraulic cylinder barrel 301 above the second circular hole 304, a top plate 313 is fixed on the top of the guide rail 307, a second spring 314 is fixed on the top of the top plate 313, and a rectangular support plate 312 is fixedly connected to the top of the second spring 314 at the bottom; symmetrical two side baffles 315 are fixed on the bottom of the sealing annular plate 309, and a transverse groove 316 is opened on one side of the two side baffles 315, and the transverse groove 316 is slidably matched with the lever 619;A base ring 317 is fixed near the top of the outer peripheral side of the hydraulic cylinder 301, a fourth sealing groove 318 is formed through the top of the base ring 317, and a plurality of third fixing holes 319 are formed on the top of the base ring 317; the top cover 5 includes a sealing cover 501 sleeved and fitted on the top of the hydraulic cylinder 301, a sliding circular hole 502 is formed through the top of the sealing cover 501; a plurality of fourth fixing holes 503 are formed through the top of the sealing cover 501, the fourth fixing holes 503 are fixedly connected with the third fixing holes 319 by bolts, and a fifth sealing rail 504 matching the fourth sealing groove 318 is fixed on the top of the sealing cover 501.;

[0058] Working principle of the first embodiment: When the hydraulic cylinder is in use, when the external hydraulic material passes through the pipe connector 610, the first conical flow pipe 611, the second conical flow pipe 612, and enters the second flow cover 704 (the hydraulic pump is a prior art, not shown in the figure, and will not be elaborated on here), and generates an impact force on the second flow cover 704 fixed on the top of the sliding pipe 701, driving the sliding pipe 701 and the second flow cover 704 to move upward in the guide pipe 603 and the first flow cover 604 in turn, and in the process of moving upward, synchronously The first spring 609 connected to the vertical slide plate 702 and the limiting groove 608 is pulled up, thereby driving the plurality of vertical slide plates 702 to slide upward in the plurality of limiting grooves 608 respectively. When the plurality of vertical slide plates 702 slide upward in the plurality of vertical grooves 607 respectively, they pass through the sliding process of the plurality of resistance rods 703 in the plurality of limiting grooves 608 respectively (in the whole process, the distance that the plurality of resistance rods 703 slide upward in the plurality of limiting grooves 608 respectively is less than the distance that the sealing annular rail 606 slides upward in the sealing annular groove 707), thereby playing a certain limiting role on the plurality of resistance rods 703 to prevent sliding. When the movable tube 701 and the second flow cover 704 slide upward in the guide tube 603 and the first flow cover 604 in turn, the phenomenon of separation occurs. When the sliding tube 701 and the second flow cover 704 slide upward in the guide tube 603 and the first flow cover 604 in turn, the second flow grooves 705 distributed in an annular manner and opened at intervals on the side surface of the second flow cover 704 will gradually produce a misalignment state with the first flow grooves 605 distributed in an annular manner and opened at intervals on the side surface of the first flow cover 604, so that the external hydraulic material gradually enters the first flow cover 604 through the second flow grooves 705. The first flow groove 605 finally enters the interior of the hydraulic cylinder 301, thereby driving the buffer 7 to slowly slide upward inside the base member 6, thereby completing the extension process of the telescopic member 4 inside the cylinder body 3. During the entire process, the buffer 7 slowly slides upward inside the base member 6, which releases a certain amount of force on the external hydraulic material entering the hydraulic cylinder 301, thereby preventing the external hydraulic material from having too much impact when entering the hydraulic cylinder, thereby damaging the internal pipe structure of the entire hydraulic cylinder, and improving the service life of the entire hydraulic system.

[0059] When the entire hydraulic cylinder is performing the extension operation, part of its external hydraulic material will enter the interior of the horn cover 621 fixed on one side of the rectangular plate 620 through the inclined conduit 613 connected to the L-shaped circulation cavity 602 at one end of the first conical circulation tube 611, thereby generating a liquid pushing force on the horn cover 621, thereby driving the rotating shaft 616 that rotates between the two inclined plates 615 to rotate, and thereby driving the levers 619 fixed on the two side surfaces of the second inclined plate 618 near the ends to slide synchronously inside the two transverse grooves 316. During the sliding process, the elastic force of the arc spring 622 fixedly connected between the inclined plate 615 and the rotating shaft 616 plays a certain force release effect, thereby providing a slowly moving upward force for the guide column tube 306 that slides inside the first circular hole 623 and the second circular hole 304, thereby driving the third sealing rail 308 fixed on the top of the guide column tube 306 to gradually snap-fit ​​into the opening at the top of the second circular hole 304. The third sealing groove 311 is provided, and the fourth sealing rail 310 fixed on the top of the sealing annular plate 309 is synchronously driven to gradually approach the first sealing groove 624 opened at the top of the rectangular cavity 614 below the first circular hole 623, until the third sealing rail 308 and the fourth sealing rail 310 are clamped with the third sealing groove 311 and the first sealing groove 624 in turn, so as to ensure that the guide column tube 306 is synchronously in a relatively sealed state when the entire hydraulic cylinder is extended. When the third sealing rail 308 and the fourth sealing rail 310 are clamped to the third sealing groove 311 and the first sealing groove 624 in turn, as the guide column tube 306 slides upward in the first circular hole 623 and the second circular hole 304 in turn, the second spring 314 fixedly connected between the top plate 313 and a rectangular support plate 312 is synchronously compressed, so as to carry out the extraction and contraction process of the hydraulic material in the hydraulic cylinder barrel 301 in the later stage, so as to facilitate the contraction action of the hydraulic cylinder in the later stage;

[0060] During the use of the hydraulic cylinder, when the external hydraulic material passes through the pipe connector 610, the first tapered flow pipe 611, and the second tapered flow pipe 612 in sequence, and enters the interior of the hydraulic cylinder barrel 301 (the hydraulic pump is a prior art, not shown in the figure, and will not be elaborated on here), the entire hydraulic cylinder extension operation is completed. When the entire hydraulic cylinder is extending, part of the hydraulic material will enter the horn cover 621 fixed on one side of the rectangular plate 620 through the inclined conduit 613 connected to the L-shaped flow cavity 602 at one end of the first tapered flow pipe 611. The inner part of the horn cover 621 generates a liquid pushing force, thereby driving the rotating shaft 616 that rotates between the two inclined plates 615 to rotate, and thereby driving the levers 619 fixed to the two sides of the second inclined plate 618 near the ends to slide synchronously inside the two transverse grooves 316. During the sliding process, the elastic force of the arc spring 622 fixedly connected between the inclined plate 615 and the rotating shaft 616 plays a certain force release role, thereby providing a guide column tube 306 that slides in the first circular hole 623 and the second circular hole 304. The force of slowly moving upward drives the third sealing rail 308 fixed on the top of the guide column tube 306 to gradually snap fit into the inside of the third sealing groove 311 opened at the top of the second circular hole 304, and synchronously drives the fourth sealing rail 310 fixed on the top of the sealing ring plate 309 to gradually approach each other toward the inside of the first sealing groove 624 opened below the first circular hole 623 at the top of the rectangular cavity 614, until the third sealing rail 308 and the fourth sealing rail 310 are snap fit with the third sealing groove 311 and the first sealing groove 624 in turn, so as to ensure that the entire hydraulic When the cylinder is extending, its guide column tube 306 is synchronously in a relatively sealed state, and the third sealing rail 308 and the fourth sealing rail 310 are sequentially clamped into the third sealing groove 311 and the first sealing groove 624. As the guide column tube 306 slides upward in the first circular hole 623 and the second circular hole 304, the second spring 314 fixedly connected between the top plate 313 and a rectangular support plate 312 is synchronously compressed, so as to later perform the process of pumping, absorbing and contracting the hydraulic material inside the hydraulic cylinder barrel 301, so as to facilitate the later contraction of the hydraulic cylinder;

[0061] When the entire hydraulic cylinder is in the process of contraction, the impact force of the external hydraulic material gradually disappears. At this time, the second spring 314 fixedly connected between the top plate 313 and a rectangular support plate 312 gradually begins to reset under its own elastic force. When the second spring 314 begins to reset, combined with the pumping process of the hydraulic pump, it synchronously drives the guide column tube 306 slidingly matched in the first circular hole 623 and the second circular hole 304 to move downward. At this time, the third sealing groove 311 and the first sealing groove 624 successively clamped in the third sealing rail 308 and the fourth sealing rail 310 are gradually separated, and thereby the elastic recovery force of the arc spring 622 and the second spring 314 gradually drives the hydraulic material in the hydraulic cylinder barrel 301 to be gradually extracted through the guide column tube 306, the inclined guide tube 613, and the first conical circulation tube 611, thereby realizing the contraction action in the entire hydraulic process.

[0062] For example 2, please refer to Figure 1-17 The second embodiment is improved on the basis of the first embodiment as follows. Specifically, the telescopic member 4 includes a hydraulic piston 401 that is slidably fitted inside the hydraulic cylinder 301, and a hydraulic piston rod 402 that is slidably fitted with the sliding circular hole 502 is fixed at one end of the hydraulic piston 401; an annular cavity 320 is opened at the top of the hydraulic cylinder 301, and an oil-absorbing cotton 321 is arranged inside the annular cavity 320; two sliding resistance rods 322 extending outward are slidably fitted through the inside of the annular cavity 320, and the two sliding resistance rods 322 are located in the annular cavity 320 at the opposite end faces, and arc-shaped extrusion plates 323 are fixed inside the annular cavity 320, and two symmetrical third springs are fixed between the arc-shaped extrusion plates 323 and the annular cavity 320. 324; a plurality of oil leakage grooves 305 connected with the annular cavity 320 are formed on the inner wall of the hydraulic cylinder 301; two symmetrical first slide grooves 403 are formed on the side surface of the hydraulic piston rod 402, two trapezoidal inclined grooves 404 respectively connected with the two first slide grooves 403 are formed on the side surface of the hydraulic piston rod 402, two second slide grooves 405 respectively connected with the two trapezoidal inclined grooves 404 are formed on the side surface of the hydraulic piston rod 402, and the depth of the first slide groove 403 is greater than the depth of the second slide groove 405; the sliding contact rod 322 is arranged in a dome shape relative to the other end surface, and the sliding contact rod 322 slides with the first slide groove 403, the trapezoidal inclined groove 404, and the second slide groove 405 in sequence relative to the other end surface.

[0063] Working principle of the second embodiment: During the use of the hydraulic cylinder, the reciprocating sliding process of the telescopic member 4 inside the hydraulic cylinder barrel 301 causes the sliding contact rod 322 to slide in the first slide groove 403, the trapezoidal inclined surface groove 404, and the second slide groove 405 which are interconnected. When the sliding contact rod 322 slides in the first slide groove 403, the trapezoidal inclined surface groove 404, and the second slide groove 405 which are interconnected, since the depth of the first slide groove 403 is greater than the depth of the second slide groove 405, and the inclined surface of the trapezoidal inclined surface groove 404 is inclined, when the sliding contact rod 322 slides in the first slide groove 403, the trapezoidal inclined surface groove 404, and the second slide groove 405 which are interconnected, and in combination with the telescopic member 4 in the hydraulic cylinder barrel 301 The reciprocating sliding process realizes the extension and retraction of the sliding resistance rod 322 on the hydraulic cylinder 301, and combines with the elastic force of the third spring 324 fixedly connected between the arc extrusion plate 323 and the annular cavity 320 to reciprocately squeeze the oil-absorbing cotton 321 placed inside the annular cavity 320, so that the lubricating material adsorbed inside the oil-absorbing cotton 321 can be squeezed out under the repeated squeezing action of the arc extrusion plate 323, and thus exposed through the oil leakage groove 305 opened on the inner wall of the hydraulic cylinder 301, so as to adhere to the peripheral side of the hydraulic piston rod 402, thereby realizing the intermittent discharging process in the whole process, avoiding repeated addition of lubricating material to the entire hydraulic cylinder, bringing certain convenience to the user, and improving the use efficiency of the hydraulic piston rod 402.

[0064] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0068] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic cylinder, comprising a cylinder assembly (1), wherein the bottom of the cylinder assembly (1) is fixedly connected to a base assembly (2), wherein: The cylinder assembly (1) comprises a cylinder member (3), a telescopic member (4) slidably fitted inside the cylinder member (3), and a top cover member (5) fixedly connected to the top of the cylinder member (3); The base assembly (2) comprises a base member (6) fixedly connected to the bottom of the cylinder member (3), and a buffer member (7) is slidably fitted inside the base member (6); The base member (6) comprises a fixed base (601), an L-shaped circulation cavity (602) is provided inside the fixed base (601), a flow guide tube (603) connected to the L-shaped circulation cavity (602) is provided on the top of the fixed base (601), a first circulation cover (604) is fixed on the top of the flow guide tube (603), a plurality of annularly distributed first circulation grooves (605) are provided at intervals through the circumferential side surface of the first circulation cover (604), a sealing annular rail (606) is fixed on the top of the first circulation cover (604), a plurality of vertical grooves (607) are provided on the inner wall of the flow guide tube (603) below the first circulation cover (604), a limiting groove (608) is provided on the inner wall of the vertical groove (607), and a plurality of first springs (609) are fixed on the inner bottom of the limiting groove (608) on the inner wall of the flow guide tube (603); The buffer member (7) comprises a sliding tube (701) that is slidably engaged in the guide tube (603); a plurality of vertical slide plates (702) that are slidably engaged with a plurality of vertical grooves (607) are fixed to the outer peripheral side surface of the sliding tube (701); a resisting rod (703) that is slidably engaged with a limiting groove (608) is fixed to one side of the vertical slide plate (702) near the bottom; a second flow cover (704) that is slidably engaged in the first flow cover (604) is fixed to the top of the sliding tube (701); a plurality of annularly distributed second flow grooves (705) are provided at intervals through the peripheral side surface of the second flow cover (704); a sealing cover cylinder (706) is fixed to the top of the second flow cover (704); a sealing ring groove (707) that is slidably engaged with the sealing ring rail (606) is provided at the bottom of the sealing cover cylinder (706); the top of the first spring (609) is fixedly connected to the bottom of the vertical slide plate (702); An expansion cover (708) is fixed to the inner wall of the sliding tube (701).

2. A hydraulic cylinder according to claim 1, characterized in that: The outer peripheral side surface of the fixed base (601) is connected to a tube body connector (610) connected to the L-shaped circulation cavity (602); the interior of the L-shaped circulation cavity (602) is connected to a first conical circulation tube (611) connected to the tube body connector (610); the outer peripheral side surface of the first conical circulation tube (611) is connected to a second conical circulation tube (612) distributed vertically; one end of the first conical circulation tube (611) is located inside the L-shaped circulation cavity (602) and is connected to an inclined conduit (613); A rectangular cavity (614) connected to the L-shaped circulation cavity (602) is provided inside the fixed base (601); inclined plates (615) are fixed to the two inner side walls of the rectangular cavity (614); a rotating shaft (616) is rotatably matched between the two inclined plates (615); a first inclined plate (617) is fixed to the side surface of the rotating shaft (616); a second inclined plate (618) is fixed to the side surface of the rotating shaft (616); levers (619) are fixed to the two side surfaces of the second inclined plate (618) near the ends; a rectangular plate (620) is fixed to one side of the first inclined plate (617); and a speaker cover (621) is fixed to one side of the rectangular plate (620); An inclined plate (615) is fixed inside the rectangular cavity (614), and an arc spring (622) is fixed between the inclined plate (615) and the rotating shaft (616).

3. A hydraulic cylinder according to claim 2, characterized in that: A first circular hole (623) communicating with the rectangular cavity (614) is formed through the top of the fixed base (601); a first sealing groove (624) is formed below the first circular hole (623) at the top of the rectangular cavity (614); A first sealing rail (625) is fixed on the top of the fixed base (601), and a plurality of first fixing holes (626) are formed through the fixed base (601); The cylinder body (3) comprises a hydraulic cylinder barrel (301), a second sealing groove (302) for engaging with a first sealing rail (625) is provided at the bottom of the hydraulic cylinder barrel (301), a plurality of second fixing holes (303) are provided at the bottom of the hydraulic cylinder barrel (301), and the second fixing holes (303) are fixedly connected to the first fixing holes (626) by bolts.

4. A hydraulic cylinder according to claim 3, characterized in that: A second circular hole (304) extending upward is provided at the bottom of the hydraulic cylinder (301); a guide groove (305) is provided through the inner wall of the second circular hole (304); a guide column tube (306) is slidably fitted inside the second circular hole (304); a guide rail (307) slidably fitted inside the guide groove (305) is fixed to the outer wall of the guide column tube (306); a third sealing rail (308) is fixed to the top of the guide column tube (306); and a sealing annular plate (309) is fixed to the bottom of the guide column tube (306).

5. A hydraulic cylinder according to claim 4, characterized in that: A fourth sealing rail (310) adapted to the first sealing groove (624) is fixed on the top of the sealing annular plate (309), and a third sealing groove (311) adapted to the third sealing rail (308) is opened on the top of the second circular hole (304); Two symmetrical rectangular support plates (312) are fixed on the inner wall of the hydraulic cylinder (301) above the second circular hole (304); a top plate (313) is fixed on the top of the guide rail (307); a second spring (314) is fixed on the top of the top plate (313); and the bottom of the rectangular support plate (312) is fixedly connected to the top of the second spring (314); Symmetrical side baffles (315) are fixed to the bottom of the sealing annular plate (309), and transverse grooves (316) are formed through one side of the two side baffles (315), and the transverse grooves (316) are slidably matched with the shifting rod (619).

6. A hydraulic cylinder according to claim 5, characterized in that: A base ring (317) is fixed on the outer peripheral side surface of the hydraulic cylinder barrel (301) near the top, a fourth sealing groove (318) is provided through the top of the base ring (317), and a plurality of third fixing holes (319) are provided on the top of the base ring (317); The top cover (5) comprises a sealing cover (501) sleeved and fitted on the top of the hydraulic cylinder (301), and a sliding circular hole (502) is formed through the top of the sealing cover (501); A plurality of fourth fixing holes (503) are formed through the top of the sealing cover (501), a fifth sealing rail (504) adapted to the fourth sealing groove (318) is fixed to the top of the sealing cover (501), and the fourth fixing holes (503) are fixedly connected to the third fixing holes (319) by bolts.

7. A hydraulic cylinder according to claim 6, characterized in that: The telescopic member (4) comprises a hydraulic piston (401) which is slidably fitted inside the hydraulic cylinder (301), and a hydraulic piston rod (402) which is slidably fitted with the sliding circular hole (502) is fixed at one end of the hydraulic piston (401); An annular cavity (320) is provided at the top of the hydraulic cylinder (301), and oil-absorbing cotton (321) is arranged inside the annular cavity (320).

8. A hydraulic cylinder according to claim 7, characterized in that: Two sliding abutment rods (322) extending outwards are slidably fitted through the annular cavity (320), and arc-shaped extrusion plates (323) are fixed to the opposite end surfaces of the two sliding abutment rods (322) located inside the annular cavity (320), and two symmetrical third springs (324) are fixed between the arc-shaped extrusion plates (323) and the annular cavity (320); The inner wall of the hydraulic cylinder barrel (301) is provided with a plurality of oil leakage grooves (305) which are in communication with the annular cavity (320).

9. A hydraulic cylinder according to claim 8, characterized in that: The hydraulic piston rod (402) is provided with two symmetrical first slide grooves (403) on the side surface thereof, the hydraulic piston rod (402) is provided with two trapezoidal inclined surface grooves (404) respectively connected to the two first slide grooves (403) on the side surface thereof, the hydraulic piston rod (402) is provided with two second slide grooves (405) respectively connected to the two trapezoidal inclined surface grooves (404) on the side surface thereof, and the depth of the first slide groove (403) is greater than the depth of the second slide groove (405); The sliding contact rod (322) is arranged in a dome shape relative to the other end surface, and the sliding contact rod (322) is slidably matched with the first sliding groove (403), the trapezoidal inclined groove (404), and the second sliding groove (405) in sequence relative to the other end surface.

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