Hydraulic cylinder buffer structure
Technical Field
The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder buffer structure.
Background
The hydraulic cylinder is used as power equipment with wide application, in the use process, as the momentum is too large, the piston can generate severe impact with the cylinder bottom at the end position of the stroke, so that the normal use and the precision of the equipment are greatly influenced, the speed of the end of the stroke needs to be reduced to avoid the phenomenon, and the damage of the impact to the equipment is reduced, so that a buffer device is designed for a plurality of hydraulic cylinders to effectively reduce the speed;
in view of the above-mentioned related art, the inventor believes that there is a buffering structure on many hydraulic cylinders that the buffering force provided at present cannot be adjusted, the buffering force cannot be changed according to the weight of the object jacked up when the hydraulic cylinder works, the adaptability is poor, meanwhile, the top of the hydraulic cylinder is not buffered, when the hydraulic cylinder reaches the maximum length, the piston can be directly contacted with the hydraulic cylinder, and the top of the hydraulic cylinder is damaged, therefore, the hydraulic cylinder buffering structure is proposed to solve the above-mentioned problems.
The above information disclosed in this background section is only for enhancement of understanding of the background section of the utility model and therefore it may not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The utility model provides a hydraulic cylinder buffer structure, which aims to solve the problems that the buffer force provided by the buffer structure on the existing hydraulic cylinder cannot be adjusted, the buffer force cannot be changed according to the weight of an object jacked up when the hydraulic cylinder works, and the adaptability is poor.
The hydraulic cylinder buffer structure provided by the utility model adopts the following technical scheme:
the utility model provides a pneumatic cylinder buffer structure, includes the cylinder body, the bottom outer wall fixedly connected with cylinder bottom of cylinder body, the bottom outer wall fixedly connected with bottom plate of cylinder body is kept away from to the cylinder bottom, the inner wall sliding connection of cylinder body has the piston, the top outer wall fixedly connected with push rod of piston, the top outer wall fixedly mounted of cylinder body has the cylinder top, the one end that the piston was kept away from to the push rod runs through cylinder top and fixedly connected with roof, the bottom outer wall fixedly connected with of roof a plurality of loop bars, a plurality of loop bars all run through the cylinder top, the top of cylinder bottom a plurality of threaded bars extend to the inner wall of a plurality of loop bars, and with loop bar sliding connection, the bottom outer wall of a plurality of loop bars all welds the extrusion piece, and a plurality of outer wall threaded connection near the cylinder bottom has the nut, and the threaded rod is located the top activity of nut is provided with the gasket, a plurality of the top outer wall fixedly connected with reset spring of gasket, a plurality of the one end that reset spring kept away from the gasket is equal fixedly connected with movable block, a plurality of the movable block all activity sets up the outer wall at the threaded rod, a plurality of the extrusion piece all laminate with a plurality of loop bars, a plurality of annular buffer rings are located two annular rings are kept away from to the corresponding annular buffer rings, two annular rings are located to the annular buffer rings are located to the cylinder top, two annular rings are located to the annular ring has the annular cushion rings is fixed to the bottom the cylinder top is located to the cylinder top fixedly.
Preferably, the outer wall of bottom plate has offered a plurality of fixed orificess, the push rod is close to the lateral wall of roof and the bottom outer wall of roof and has welded a plurality of reinforcing plates jointly, and a plurality of the reinforcing plate is circumference array evenly distributed at the outer wall of push rod.
Preferably, the cylinder bottom is located the inside top outer wall fixedly connected with solid fixed ring of cylinder body, gu fixed ring keeps away from a side outer wall fixedly connected with a plurality of first telescopic links of cylinder bottom, a plurality of gu fixed ring's one end is kept away from to first telescopic link is fixedly connected with annular shock pad jointly, and compression spring is all installed to the outer wall of a plurality of first telescopic links, and is a plurality of compression spring is located between fixed ring and the annular shock pad.
Preferably, the annular shock pad is fixedly connected with a plurality of hinge blocks with the outer wall opposite to the fixed ring, a plurality of hinge blocks are all rotationally connected with connecting rods, two connecting rods are hinged with connecting blocks jointly at the end, away from the hinge blocks, of each connecting rod, and buffer springs are fixedly connected with the outer walls of the two opposite connecting blocks jointly.
Preferably, a plurality of damping springs are all installed to the outer wall of second telescopic link, a plurality of damping springs's one end fixed connection is in the outer wall on jar top, and a plurality of damping springs keep away from jar top's one end fixed connection is in the outer wall of annular buffer plate.
In summary, the utility model has the following beneficial technical effects:
1. when the cylinder body works, the jack-up is carried out on the heavy objects through the push rod and the top plate, and then the heavy objects retract and are put down, because the weight of the jacked objects is large, the push rod can drive the piston to be in contact with the annular shock pad when retracting, the annular shock pad is downwards extruded through the mutual matching of the first telescopic rod, the compression spring, the connecting rod, the connecting block and the buffer spring, so that the piston and the push rod are buffered and protected, when the top plate drives the push rod to retract, the top plate drives a plurality of sleeve rods to downwards slide on the outer walls of a plurality of threaded rods, the extrusion blocks at the bottom ends of the sleeve rods downwards extrude the movable blocks and the reset spring, the push rod and the piston are further buffered under the action of the reset springs, and the nut is enabled to rotate on the outer wall threads of the threaded rods through rotating the nut, the nut is enabled to adjust the height along the outer walls of the threaded rods, so that the gasket is driven to adjust the buffer force of the reset spring, and the hydraulic cylinder can buffer piston rods which are propped against objects with different weights, so that the adaptability of the cylinder body is improved;
2. through annular rubber circle, annular buffer board, second telescopic link and the damping spring that sets up, when the push rod stretches to maximum length, annular rubber circle and annular buffer board striking contact, annular rubber circle can avoid piston and jar top rigid contact, and a plurality of second telescopic links are extruded by annular buffer board and stretch out and draw back, provide sufficient buffer space, reduce impact by a wide margin under a plurality of damping spring's effect to reach the damage that the piston caused the cylinder body when effectively reducing the push rod and stretching to maximum length, play the cushioning effect.
Drawings
FIG. 1 is an overall schematic of an embodiment of the application;
FIG. 2 is a partial cross-sectional view of an embodiment of the application;
FIG. 3 is an enlarged schematic view of the structure shown in FIG. 2A;
FIG. 4 is a first partial block diagram of an embodiment of the application;
FIG. 5 is a second partial block diagram of an embodiment of the application;
fig. 6 is an enlarged schematic view of the structure at B in fig. 5.
Reference numerals illustrate: 1. a cylinder; 2. a cylinder bottom; 3. a bottom plate; 4. a fixing hole; 5. a cylinder top; 6. a piston; 7. a push rod; 8. a top plate; 9. a reinforcing plate; 10. a fixing ring; 11. a first telescopic rod; 12. a compression spring; 13. an annular shock pad; 14. a hinge block; 15. a connecting rod; 16. a connecting block; 17. a buffer spring; 18. an annular rubber ring; 19. a second telescopic rod; 20. a damping spring; 21. an annular buffer plate; 22. a loop bar; 23. extruding a block; 24. a threaded rod; 25. a movable block; 26. a return spring; 27. a gasket; 28. and (3) a nut.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-6.
The embodiment of the utility model discloses a hydraulic cylinder buffer structure. Referring to fig. 1-6, the hydraulic cylinder buffer structure comprises a cylinder body 1, a bottom outer wall of the cylinder body 1 is fixedly connected with a cylinder bottom 2, the bottom outer wall of the cylinder bottom 2 far away from the cylinder body 1 is fixedly connected with a bottom plate 3, an inner wall of the cylinder body 1 is slidably connected with a piston 6, a top outer wall of the piston 6 is fixedly connected with a push rod 7, a cylinder top 5 is fixedly installed on the top outer wall of the cylinder body 1, one end of the push rod 7 far away from the piston 6 penetrates through the cylinder top 5 and is fixedly connected with a top plate 8, a plurality of loop bars 22 are fixedly connected with the bottom outer wall of the top plate 8, a plurality of threaded rods 24 are fixedly connected with the top outer wall of the cylinder bottom 2, the top ends of the plurality of the threaded rods 24 extend to the inner walls of the plurality of loop bars 22 and are slidably connected with the loop bars 22, extrusion blocks 23 are welded on the bottom outer walls of the plurality of the loop bars 22, the outer wall threaded connection that a plurality of threaded rods 24 are close to the cylinder bottom 2 has nut 28, the threaded rod 24 is located the top activity of nut 28 and is provided with gasket 27, the top outer wall fixedly connected with reset spring 26 of a plurality of gaskets 27, the equal fixedly connected with movable block 25 of one end that a plurality of reset springs 26 kept away from gasket 27, a plurality of movable blocks 25 all activity set up the outer wall at threaded rod 24, a plurality of movable blocks 25 all laminate mutually with a plurality of extrusion piece 23, the top outer wall fixed mounting of piston 6 has annular rubber circle 18, the bottom outer wall fixedly connected with a plurality of second telescopic links 19 that cylinder top 5 is located the inside of cylinder body 1, the one end fixedly connected with annular buffer plate 21 that a plurality of second telescopic links 19 kept away from cylinder top 5, annular buffer plate 21 corresponds with annular rubber circle 18.
The outer wall of bottom plate 3 has seted up a plurality of fixed orificess 4, and the outer lateral wall that push rod 7 is close to roof 8 has welded a plurality of reinforcing plates 9 jointly with the bottom outer wall of roof 8, and a plurality of reinforcing plates 9 are circumference array evenly distributed at the outer wall of push rod 7, and it is fixed with cylinder body 1 to utilize fastening bolt through a plurality of fixed orificess 4, and the connection stability between a plurality of reinforcing plates 9 make push rod 7 and roof 8 strengthens for roof 8 can lift heavier article, and the loading force promotes.
The cylinder bottom 2 is located the inside top outer wall fixedly connected with solid fixed ring 10 of cylinder body 1, gu fixed ring 10 keeps away from a side outer wall fixedly connected with a plurality of first telescopic links 11 of cylinder bottom 2, a plurality of first telescopic links 11 keep away from the common fixedly connected with annular shock pad 13 of one end of gu fixed ring 10, compression spring 12 is all installed to the outer wall of a plurality of first telescopic links 11, a plurality of compression springs 12 are located between solid fixed ring 10 and the annular shock pad 13, extrusion first telescopic link 11 when annular shock pad 13 pushes down for first telescopic link 11 stretches out and draws back, and then a plurality of compression springs 12 are pushed down to annular shock pad 13, a plurality of compression springs 12 deformation produces elasticity, offset the buffering to annular shock pad 13's extrusion force, slow down annular shock pad 13's push down speed.
The outer wall that annular shock pad 13 and solid fixed ring 10 are relative fixedly connected with a plurality of hinge blocks 14, a plurality of hinge blocks 14 all rotate and are connected with connecting rod 15, the connecting block 16 is articulated jointly to the one end that two connecting rods 15 about adjacent kept away from hinge block 14, the buffer spring 17 is fixedly connected with jointly to two opposite connecting block 16 outer walls, also can extrude connecting rod 15 when annular shock pad 13 pushes down simultaneously, because the both ends of connecting rod 15 are articulated with hinge block 14 and connecting block 16 respectively, and hinge block 14 is fixed at solid fixed ring 10's outer wall, when connecting rod 15 is extruded, its one end that keeps away from hinge block 14 can extrude connecting block 16, extrude two connecting blocks 16 and be close to each other, and then two connecting blocks 16 extrusion buffer spring 17 deformation produces elasticity, further offset annular shock pad 13's extrusion force.
The damping springs 20 are all installed to the outer wall of a plurality of second telescopic links 19, and the one end fixed connection of a plurality of damping springs 20 is at the outer wall of jar top 5, and the one end fixed connection that a plurality of damping springs 20 kept away from jar top 5 is at the outer wall of annular buffer plate 21.
The implementation principle of the hydraulic cylinder buffer structure of the embodiment of the utility model is as follows: when the cylinder body 1 works, the jack-up is carried out on a counterweight through the push rod 7 and the top plate 8, and then the counterweight is retracted and lowered, because the weight of the jacked object is large, the push rod 7 can drive the piston 6 to contact with the annular shock pad 13 during retraction, the annular shock pad 13 downwards extrudes the first telescopic rod 11, the first telescopic rod 11 stretches and contracts, the annular shock pad 13 extrudes a plurality of compression springs 12, the compression springs 12 deform to generate elastic force, the extrusion force of the annular shock pad 13 is counteracted and buffered, the pressing speed of the annular shock pad 13 is slowed down, meanwhile, the connecting rod 15 is extruded when the annular shock pad 13 is pressed down, because the two ends of the connecting rod 15 are respectively hinged with the hinging block 14 and the connecting block 16, the hinging block 14 is fixed on the outer wall of the fixed ring 10, when the connecting rod 15 is extruded, one end of the connecting rod 15 far away from the hinging block 14 can extrude the connecting block 16, the two connecting blocks 16 are extruded and are mutually close, the two connecting blocks 16 squeeze the buffer springs 17, the buffer springs 17 deform to generate elasticity, the extrusion force of the annular buffer pad 13 is further counteracted, the downward pressing speed of the annular buffer pad 13 is reduced, the piston 6 is buffered and protected, and when the top plate 8 drives the push rod 7 to retract, the top plate 8 drives the plurality of sleeve rods 22 to slide downwards on the outer walls of the plurality of threaded rods 24, the extrusion blocks 23 at the bottom ends of the plurality of sleeve rods 22 downwards extrude the movable blocks 25 and the reset springs 26, the reset springs 26 deform to generate elasticity, the push rod 7 and the piston 6 are further buffered under the action of the plurality of reset springs 26, the nut 28 rotates on the outer wall threads of the threaded rods 24 through rotating the nut 28, the nut 28 adjusts the height along the outer wall of the threaded rods 24, when the nut 28 drives the gasket 27 to ascend, the gasket 27 compresses the reset springs 26, the buffer elasticity of the reset springs 26 becomes smaller, when the nut 28 drives the gasket 27 to descend, the reset spring 26 is gradually pulled away under the action of self elasticity, and the buffer elasticity of the reset spring 26 is increased at the moment, so that the gasket 27 drives the reset spring 26 to adjust buffer force, and the hydraulic cylinder can buffer the push rod 7 propping against objects with different weights conveniently; when the push rod 7 stretches to the maximum length, the annular rubber ring 18 is in impact contact with the annular buffer plate 21, the annular rubber ring 18 can avoid rigid contact between the piston 6 and the cylinder top 5, and the plurality of second telescopic rods 19 are extruded and telescopic by the annular buffer plate 21 to provide sufficient buffer space, impact force is greatly reduced under the elastic force action of the plurality of damping springs 20, so that damage to the top of the cylinder body 1 caused by the piston 6 when the push rod 7 stretches to the maximum length is effectively reduced, and a buffer effect is achieved.
The last points to be described are: first, in the description of the present utility model, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;
secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;
finally: the foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.