CN215719942U

CN215719942U - Floating buffer hydraulic oil cylinder for crane

Info

Publication number: CN215719942U
Application number: CN202122427224.9U
Authority: CN
Inventors: 黄彦; 严莉; 蒋春燚; 喻洁
Original assignee: Wuhan Jiangrong Intelligent Engineering Co ltd
Current assignee: Wuhan Jiangrong Intelligent Engineering Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-02-01
Anticipated expiration: 2031-10-09

Abstract

The utility model discloses a floating buffer hydraulic cylinder for a crane, which comprises a buffer seat and a buffer column, wherein the outer surface of the buffer seat is fixedly connected with the outer surfaces of an installation plate and a cylinder barrel respectively, the outer surface of the buffer column is in threaded connection with the inner part of a piston rod in a penetrating manner, a clamping groove is formed in the buffer seat, the inner surface of the clamping groove is in sliding connection with the outer surface of the buffer column, a stud is fixedly connected with the inner surface of the clamping groove, the outer surface of the stud is in threaded connection with a clamping sleeve, a convex edge is clamped on the inner surface of the clamping sleeve, and a rubber column is fixedly connected on the outer surface of the convex edge. This a buffering hydraulic cylinder that floats for hoist through setting up buffer gear, and spring and rubber column offset the atress of buffering post through elasticity, reach the purpose reduction cylinder that cushions and receive the damage, solved the relatively poor problem that leads to cylinder liner life weak point of current hydraulic cylinder's buffering effect through the combination of above-mentioned structure.

Description

Floating buffer hydraulic oil cylinder for crane

Technical Field

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a floating buffer hydraulic oil cylinder for a crane.

Background

The hydraulic cylinder is an actuating element in a hydraulic transmission system, and is an energy conversion device for converting hydraulic energy into mechanical energy, a hydraulic motor realizes continuous rotary motion, the hydraulic cylinder realizes reciprocating motion, the structural types of the hydraulic cylinder comprise three types of piston cylinders, plunger cylinders and swing cylinders, the piston cylinders and the plunger cylinders realize reciprocating linear motion, output speed and thrust, the swing cylinders realize reciprocating swing, rotating speed and torque, and the hydraulic cylinder can be used singly or in combination of two or more or other mechanisms to complete special functions.

At present, hydraulic cylinder's buffer is mostly to open the oilhole on the cylinder bottom, be equipped with the buffering plunger on the piston rod, when the piston rod moves to the cylinder bottom soon to the stroke end, the buffering plunger gets into in the oilhole of cylinder bottom, fluid can only flow out through the buffering clearance that buffering plunger and cylinder bottom oilhole formed, thereby reach buffering effect, however, buffering clearance often because the welding of cylinder bottom or the condition of neglecting little appears in the assembly, lead to buffering effect poor, if additionally increase the flow controller on the cylinder bottom and carry out the throttle adjustment, must bring the increase of manufacturing cost and processing degree of difficulty, current piston rod is when reciprocating motion, can strike the cylinder liner bottom, current buffering subassembly buffering effect is poor, there are the problem that cylinder liner life is short and throttle is with high costs.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a floating buffer hydraulic cylinder for a crane, which solves the problem that the service life of a cylinder sleeve is short due to the poor buffering effect of the conventional hydraulic cylinder.

In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a buffering hydraulic cylinder that floats for hoist, includes cylinder, piston rod and piston, sliding connection is run through with the surface of piston rod in the inside of cylinder, fixed connection is run through with the surface of piston rod in the inside of piston, the surface of piston and the inner wall sliding connection of cylinder, the outside of cylinder is provided with the mounting panel, the surface of mounting panel is provided with buffer gear.

The buffer mechanism comprises a buffer seat and a buffer column, the outer surface of the buffer seat is respectively fixedly connected with the outer surfaces of the mounting plate and the cylinder barrel, the outer surface of the buffer column is in threaded connection with the inside of the piston rod in a penetrating manner, a clamping groove is formed in the buffer seat, the inner surface of the clamping groove is in sliding connection with the outer surface of the buffer column, a stud is fixedly connected to the inner surface of the clamping groove, a clamping sleeve is in threaded connection with the outer surface of the stud, a convex edge is clamped on the inner surface of the clamping sleeve, a rubber column is fixedly connected to the outer surface of the convex edge, the outer surface of the rubber column is in movable connection with the inside of the clamping sleeve in a penetrating manner, one end of the buffer column is movably connected with one end of the rubber column, a through groove communicated with the inner surface of the clamping groove is formed in the buffer seat, a telescopic rod is fixedly connected to the inner surface of the through groove, and a spring is sleeved on the outer surface of the telescopic rod, the outer surfaces of the spring and the telescopic rod are movably connected with the outer surface of the rubber column.

Preferably, one end of the cylinder barrel is fixedly connected with a buffer sleeve, a sealing element is arranged on the outer surface of the buffer sleeve, and the outer surface of the piston rod is respectively connected with the buffer sleeve and the inner wall of the sealing element in a sliding manner.

Preferably, the inside of cylinder runs through the intercommunication and has defeated oil pipe, the inside fixedly connected with oil inlet pipe that runs through of cushion collar.

Preferably, the inside of the buffer sleeve is provided with a sliding chute communicated with the inner wall of the oil inlet pipe, and the inside of the buffer sleeve is provided with oil grooves respectively communicated with the inner surface of the buffer seat and the inner surface of the sliding chute.

Preferably, the inner surface of the sliding groove is connected with a sliding block in a sliding mode, and the outer surface of the sliding block is provided with a conical groove.

Preferably, the conical groove, the oil groove and the oil inlet pipe are located on the same axial lead, and the outer surface of the sliding block is provided with a cambered surface.

Advantageous effects

The utility model provides a floating buffering hydraulic oil cylinder for a crane. Compared with the prior art, the method has the following beneficial effects:

(1) this a buffering hydraulic cylinder floats for hoist, through setting up buffer gear, the cutting ferrule through the joint with the chimb and with the threaded connection of double-screw bolt, make inside being in the draw-in groove that the rubber post can be stable, drive the cushion column motion when the piston rod motion resets, thereby the cushion column gets into inside the draw-in groove and contact with the rubber post, thereby because cushion column atress effect extrudees the rubber post, thereby rubber post atress deformation compression telescopic link and spring, spring and rubber post offset the atress of cushion column through self elasticity, thereby reach the purpose reduction cylinder of buffering and receive the damage, the relatively poor problem that leads to cylinder liner life weak point of current hydraulic cylinder's buffering effect has been solved through the combination of above-mentioned structure.

(2) This a buffering hydraulic cylinder that floats for hoist, through the cushion collar, the spout, the slider, the combination of conical groove isotructure, the piston rod drives the piston motion when stretching out the motion, the piston promotes the hydraulic oil motion, thereby it is inside to push the spout with the slider to move hydraulic oil, make the oil groove, the conical groove, advance oil pipe and be linked together, hydraulic oil has used the oil groove thereupon, the conical groove, advance oil pipe and discharge, because conical groove one side aperture is less to lead to the oil extraction volume lower, make the inside oil pressure of cylinder one side higher, thereby cushion the loss that reduces the cylinder to piston rod and piston, the relatively poor problem that leads to cylinder liner life weak of current hydraulic cylinder's buffering effect has been solved through the combination of above-mentioned structure.

Drawings

FIG. 1 is a sectional view showing the internal structure of the present invention;

FIG. 2 is an exploded view of the interior of the buffer base according to the present invention;

fig. 3 is a disassembled view of the inner structure of the cushion collar of the present invention.

In the figure: 1-cylinder barrel, 2-piston rod, 3-piston, 4-mounting plate, 5-buffer mechanism, 51-buffer seat, 52-buffer column, 53-clamping groove, 54-stud, 55-clamping sleeve, 56-convex edge, 57-rubber column, 58-through groove, 59-telescopic rod, 510-spring, 6-buffer sleeve, 7-sealing element, 8-oil pipeline, 9-oil inlet pipe, 10-sliding groove, 11-oil groove, 12-sliding block, 13-conical groove and 14-cambered surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a floating buffer hydraulic cylinder for a crane comprises a cylinder barrel 1, a piston rod 2 and a piston 3, wherein the inside of the cylinder barrel 1 is in penetrating sliding connection with the outer surface of the piston rod 2, the inside of the piston 3 is in penetrating fixed connection with the outer surface of the piston rod 2, the outer surface of the piston 3 is in sliding connection with the inner wall of the cylinder barrel 1, an installation plate 4 is arranged on the outer side of the cylinder barrel 1, and a buffer mechanism 5 is arranged on the outer surface of the installation plate 4; the buffer mechanism 5 comprises a buffer seat 51 and a buffer column 52, the outer surface of the buffer seat 51 is fixedly connected with the outer surfaces of the mounting plate 4 and the cylinder barrel 1 respectively, the outer surface of the buffer column 52 is in threaded connection with the inside of the piston rod 2, a clamping groove 53 is formed inside the buffer seat 51, the inner surface of the clamping groove 53 is in sliding connection with the outer surface of the buffer column 52, a stud 54 is fixedly connected with the inner surface of the clamping groove 53, a clamping sleeve 55 is in threaded connection with the outer surface of the stud 54, the clamping sleeve 55 enhances the stability of the rubber column 57, the outer diameter of the clamping sleeve 55 is matched with the inner diameter of the clamping groove 53, a convex edge 56 is clamped on the inner surface of the clamping sleeve 55, a rubber column 57 is fixedly connected with the outer surface of the convex edge 56, the rubber column 57 and the convex edge 56 are made of rubber integrally, the outer diameter of the rubber column 57 is slightly smaller than the inner diameter of the clamping groove 53, the outer surface of the rubber column 57 is movably connected with the inside of the clamping sleeve 55 in a penetrating way, and one end of the buffer column 52 is movably connected with one end of the rubber column 57, the inside of the buffer seat 51 is provided with a through groove 58 communicated with the inner surface of the clamping groove 53, the inner surface of the through groove 58 is fixedly connected with an expansion link 59, the outer surface of the expansion link 59 is sleeved with a spring 510, the outer surfaces of the spring 510 and the expansion link 59 are movably connected with the outer surface of the rubber column 57, one end of the cylinder barrel 1 is fixedly connected with a buffer sleeve 6, the inner wall inner diameter of the buffer sleeve 6 is larger than the outer diameter of the piston rod 2, the outer surface of the buffer sleeve 6 is provided with a sealing element 7, the sealing property of the sealing element 7 enhancing device prevents hydraulic oil from leaking, the inner wall inner diameter size of the sealing element 7 is matched with the outer diameter size of the piston rod 3, the outer surface of the piston rod 2 is respectively connected with the inner walls of the buffer sleeve 6 and the sealing element 7 in a sliding manner, the inside of the cylinder barrel 1 is communicated with an oil delivery pipe 8, the inside of the buffer sleeve 6 is fixedly connected with an oil inlet pipe 9, and the oil delivery pipe 8 are both connected with external oil supply equipment, the inside of cushion collar 6 is seted up and is advanced oil pipe 9 inner wall linked together's spout 10, the inside of cushion collar 6 is seted up respectively with the oil groove 11 that is linked together of buffer seat 51 internal surface and spout 10 internal surface, the internal surface sliding connection of spout 10 has slider 12, slider 12 is spacing with being connected with of spout 10 and is set up, tapered groove 13 has been seted up to slider 12's surface, tapered groove 13 large aperture department is just to oil groove 11, small aperture department is just to advancing oil pipe 9, tapered groove 13 with oil groove 11 and advance oil pipe 9 and be in same axial lead, the surface of slider 12 is provided with cambered surface 14, the cambered surface 14 of slider 12 is in the one side that spout 10 leaned on the interior.

And those not described in detail in this specification are well within the skill of those in the art.

When the device is stretched out: the external oil supply equipment presses hydraulic oil into the left side of the piston 3 through the oil pipeline 8 by utilizing pressure, then the hydraulic oil pushes the piston 3 to drive the piston rod 2 to move to extend through the pressure, the piston 3 pushes the hydraulic oil on the right side to move when moving, the hydraulic oil on the right side is discharged through the oil groove 11, the sliding groove 10 and the oil inlet pipe 9 when moving, the sliding block 12 is pushed by the hydraulic oil on the right side to move to the inside of the sliding groove 10, so that the conical groove 13 is communicated with the oil groove 11 and the oil inlet pipe 9, and the hydraulic oil on the right side is discharged through the conical groove 13 along with the movement, the oil discharge amount is reduced due to the small aperture on one side of the conical groove 13, the oil pressure on the right side of the piston 3 is increased, and the piston 3 is buffered to reduce the loss of the cylinder barrel 1;

when retracting: outside fuel feeding equipment utilizes pressure to impress hydraulic oil through advancing oil pipe 9 the right side of piston 3, hydraulic oil gets into 10 inside cambered surface 14 contact promotion slider 12 roll-off spout 10 on the slider 12, and hydraulic oil passes through

oil groove

11 and 6 inner walls of cushion collar get into inside the cylinder 1, thereby it drives piston rod 2 motion reset to promote piston 3, piston 3 motion promotes the motion of left side hydraulic oil and discharges through defeated oil pipe 8, 2 motions of piston rod drive cushion post 52 motion, cushion post 52 motion gets into the inside and rubber column 57 contact of draw-in groove 53, thereby rubber column 57 atress deformation compression telescopic link 59 and spring 510, spring 510 and rubber column 57 offset the atress of piston rod 2 through self elasticity, thereby reduce the loss of cylinder 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a buffering hydraulic cylinder that floats for hoist, includes cylinder (1), piston rod (2) and piston (3), sliding connection is run through with the surface of piston rod (2) in the inside of cylinder (1), the inside of piston (3) and the surface of piston rod (2) run through fixed connection, the surface of piston (3) and the inner wall sliding connection of cylinder (1), its characterized in that: the outer side of the cylinder barrel (1) is provided with a mounting plate (4), and the outer surface of the mounting plate (4) is provided with a buffer mechanism (5);

the buffer mechanism (5) comprises a buffer seat (51) and a buffer column (52), the outer surface of the buffer seat (51) is respectively fixedly connected with the outer surfaces of the mounting plate (4) and the cylinder barrel (1), the outer surface of the buffer column (52) is in threaded connection with the inner part of the piston rod (2), a clamping groove (53) is formed in the buffer seat (51), the inner surface of the clamping groove (53) is in sliding connection with the outer surface of the buffer column (52), a stud (54) is fixedly connected with the inner surface of the clamping groove (53), a clamping sleeve (55) is in threaded connection with the outer surface of the stud (54), a convex edge (56) is clamped on the inner surface of the clamping sleeve (55), a rubber column (57) is fixedly connected with the outer surface of the convex edge (56), the outer surface of the rubber column (57) is movably connected with the inner part of the clamping sleeve (55), one end of the buffer column (52) is movably connected with one end of the rubber column (57), the inside of cushion socket (51) is seted up logical groove (58) that are linked together with draw-in groove (53) internal surface, the internal surface fixedly connected with telescopic link (59) that lead to groove (58), the surface cover of telescopic link (59) is equipped with spring (510), the surface of spring (510) and telescopic link (59) all with the surface swing joint of rubber column (57).

2. A floating buffer hydraulic ram for a crane as claimed in claim 1 wherein: one end fixedly connected with cushion collar (6) of cylinder (1), the surface of cushion collar (6) is provided with sealing member (7), the surface of piston rod (2) respectively with the inner wall sliding connection of cushion collar (6) and sealing member (7).

3. A floating buffer hydraulic ram for a crane as claimed in claim 2 wherein: an oil conveying pipe (8) penetrates through the inside of the cylinder barrel (1), and an oil inlet pipe (9) is fixedly connected with the inside of the buffer sleeve (6) in a penetrating mode.

4. A floating buffer hydraulic ram for a crane as claimed in claim 2 wherein: the oil inlet pipe is characterized in that a sliding groove (10) communicated with the inner wall of the oil inlet pipe (9) is formed in the buffer sleeve (6), and oil grooves (11) communicated with the inner surface of the buffer seat (51) and the inner surface of the sliding groove (10) are formed in the buffer sleeve (6).

5. A floating buffer hydraulic ram for a crane as claimed in claim 4 wherein: the inner surface of the sliding groove (10) is connected with a sliding block (12) in a sliding mode, and a conical groove (13) is formed in the outer surface of the sliding block (12).

6. A floating buffer hydraulic ram for a crane as claimed in claim 5 wherein: the conical groove (13) is positioned on the same axial lead with the oil groove (11) and the oil inlet pipe (9), and the outer surface of the sliding block (12) is provided with a cambered surface (14).