CN210317978U

CN210317978U - Piston sensitive excavator oil cylinder

Info

Publication number: CN210317978U
Application number: CN201920684406.4U
Authority: CN
Inventors: 李孟军
Original assignee: Xinchang County Chengguan Liye Machinery Factory
Current assignee: Xinchang County Chengguan Liye Machinery Factory
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2020-04-14
Anticipated expiration: 2029-05-14

Abstract

The utility model relates to an excavator hydro-cylinder technical field specifically is a piston sensitive excavator hydro-cylinder, including cylinder and piston rod, the one end of piston rod stretches into the inside of cylinder, and the end of cylinder is installed with the cylinder cap through the bolt fastening, and the surface of piston rod is located the inside cover of cylinder and is equipped with the cushion collar, and the surface of piston rod is located the lower pot head of cushion collar and is equipped with the piston, and the surface of piston rod is located the lower end spiro union of piston and has the nut, and the surface cover of piston is equipped with the piston main seal; the beneficial effects are that: the inner cylinder is arranged in the piston, and the spring is arranged between the inner cylinder and the piston, so that when the outer surface of the piston is stressed, the spring can be compressed, the whole piston is contracted, and the phenomenon that the piston rod cannot move due to the fact that the piston is clamped with the inner wall of the cylinder barrel is avoided; through setting up the breach, to the piston rod of different diameters, the deformation that the inner tube produced can be offset to the breach, and the adaptability is stronger, and sensitivity is higher.

Description

Piston sensitive excavator oil cylinder

Technical Field

The utility model relates to an excavator hydro-cylinder correlation technique field specifically is a piston sensitive type excavator hydro-cylinder.

Background

The special hydraulic oil cylinder for the excavator is one of executing elements of an excavator hydraulic system, is used for executing linear reciprocating motion, is simple in structure, small in mass and convenient to maintain, and can be used for solving the problem that a piston rod of the oil cylinder of the excavator is clamped and cannot stretch out and draw back in the using process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sensitive formula excavator hydro-cylinder of piston is in order to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a piston sensitive excavator cylinder, includes cylinder and piston rod, the one end of piston rod stretches into the inside of cylinder, there is the cylinder cap terminal of cylinder through bolt fixed mounting, the inside cover that the surface of piston rod is located the cylinder is equipped with the cushion collar, the lower pot head that the surface of piston rod is located the cushion collar is equipped with the piston, the lower extreme spiro union that the surface of piston rod is located the piston has the nut, the surface cover of piston is equipped with the piston main seal, and one side cover that the surface of piston is located the piston main seal is equipped with wear-resistant ring, the center fixed mounting of piston has the inner tube, and the piston rod passes the inside of inner tube, the surface of piston rod and the outer surface.

Preferably, two sets of annular grooves are seted up to the surface of piston, and piston main seal and ring of wearing are located two sets of annular grooves respectively, and the ring of wearing is close to one side of cushion collar, and piston main seal is close to one side of nut.

Preferably, the inner diameter of the piston main seal is smaller than the inner diameter of the anti-wear ring, the outer diameter of the piston main seal is the same as the outer diameter of the anti-wear ring, the outer surface of the piston is in contact with the inner wall of the cylinder barrel, and the outer surface of the piston main seal is in contact with the inner wall of the cylinder barrel.

Preferably, the upper surface of the piston is provided with a round hole, the inner cylinder is positioned inside the round hole, the upper end of the inner cylinder is integrally formed with a circular ring, and the outer surface of the circular ring is in contact with the inner wall of the round hole.

Preferably, the outer diameter of the inner cylinder is smaller than that of the circular ring, a plurality of groups of springs are arranged between the outer surface of the inner cylinder and the inner wall of the circular hole, the springs are uniformly arranged on the outer surface of the inner cylinder in an annular mode, and two ends of each spring are fixedly bonded with the outer surface of the inner cylinder and the inner wall of the circular hole.

Preferably, a group of gaps are vertically formed in the outer surface of the inner cylinder, and the gaps penetrate through the upper surface of the circular ring and the lower end of the inner cylinder.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the inner cylinder is arranged in the piston, and the spring is arranged between the inner cylinder and the piston, so that when the outer surface of the piston is stressed, the spring can be compressed, the whole piston is contracted, and the phenomenon that the piston rod cannot move due to the fact that the piston is clamped with the inner wall of the cylinder barrel is avoided;

2. through setting up the breach, to the piston rod of different diameters, the deformation that the inner tube produced can be offset to the breach, and the adaptability is stronger, and sensitivity is higher.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the inner cylinder and the piston of the present invention;

fig. 3 is a sectional view of the piston of the present invention.

In the figure: 1 cylinder, 2 piston rods, 3 cushion bushes, 4 pistons, 5 piston main seals, 6 antiwear rings, 7 nuts, 8 round holes, 9 inner cylinders, 10 round rings, 11 springs, 12 annular grooves and 13 gaps.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 3, the present invention provides a technical solution: a cylinder of a piston-sensitive excavator, as shown in figure 1, comprises a cylinder barrel 1 and a piston rod 2, one end of the piston rod 2 extends into the cylinder barrel 1, a cylinder cover is fixedly installed at the tail end of the cylinder barrel 1 through a bolt, a buffer sleeve 3 is sleeved on the outer surface of the piston rod 2 positioned in the cylinder barrel 1, a piston 4 is sleeved on the outer surface of the piston rod 2 positioned at the lower end of the buffer sleeve 3, a nut 7 is screwed on the outer surface of the piston rod 2 positioned at the lower end of the piston 4, two groups of annular grooves 12 are formed in the outer surface of the piston 4, a piston main seal 5 is sleeved on the outer surface of the piston 4, an anti-wear ring 6 is sleeved on one side of the piston main seal 5, the piston main seal 5 and the anti-wear ring 6 are respectively positioned in the two groups of annular grooves 12, the anti-wear ring 6 is close to one side of the buffer sleeve 3, the outer diameter of the piston main seal 5 is the same as that of the antiwear ring 6, the outer surface of the piston 4 is in contact with the inner wall of the cylinder barrel 1, and the outer surface of the piston main seal 5 is in contact with the inner wall of the cylinder barrel 1.

As shown in fig. 2 and 3, an inner cylinder 9 is arranged at the center of a piston 4, a circular hole 8 is formed in the upper surface of the piston 4, the inner cylinder 9 is located inside the circular hole 8, a circular ring 10 is integrally formed at the upper end of the inner cylinder 9, the outer surface of the circular ring 10 contacts with the inner wall of the circular hole 8, a piston rod 2 passes through the inner part of the inner cylinder 9, the outer surface of the piston rod 2 contacts with the outer surface of the inner cylinder 9, the outer diameter of the inner cylinder 9 is smaller than the outer diameter of the circular ring 10, a plurality of groups of springs 11 are arranged between the outer surface of the inner cylinder 9 and the inner wall of the circular hole 8, the springs 11 are uniformly arranged in a ring shape on the outer surface of the inner cylinder 9, two ends of the springs 11 are fixedly bonded with the outer surface of the inner cylinder 9 and the inner wall of the circular hole 8, the inner cylinder 9 is fixedly connected with the piston 4 through, the deformation that the breach can offset the inner tube and produce, and the adaptability is stronger, and sensitivity is higher.

The working principle is as follows: buffer sleeve 3 is established to the surface cover in proper order at piston rod 2, piston 4 and spiro union nut 7, piston 4 is fixed between nut 7 and buffer sleeve 3, place piston primary seal 5 and wear-resistant ring 6 in the annular groove 12 of the surface of piston 4, increase piston leakproofness and alleviated the wearing and tearing of cylinder 1 inner wall to piston 4 surface simultaneously, set up spring 11 and inner tube 9 inside piston 4, can make piston 4 expand or shrink because of the change of external pressure, here require piston 4 to be porous material, when making piston 4 all the time with the contact of cylinder 1 inner wall, can not make piston 4 card die in cylinder 1 again, set up breach 13 on the surface of inner tube 9, breach 13 can offset the deformation that inner tube 9 produced, adaptability is stronger, and sensitivity is higher.

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 invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a piston sensitive excavator cylinder, includes cylinder (1) and piston rod (2), its characterized in that: one end of the piston rod (2) extends into the cylinder barrel (1), the tail end of the cylinder barrel (1) is fixedly provided with a cylinder cover through a bolt, the outer surface of the piston rod (2) is sleeved with a buffer sleeve (3) inside the cylinder barrel (1), the outer surface of the piston rod (2) is sleeved with a piston (4) at the lower end of the buffer sleeve (3), the outer surface of the piston rod (2) is positioned at the lower end of the piston (4) and is in threaded connection with a nut (7), the outer surface of the piston (4) is sleeved with a main piston seal (5), and one side of the outer surface of the piston (4) positioned on the main seal (5) of the piston is sleeved with an antiwear ring (6), the center of the piston (4) is fixedly provided with an inner cylinder (9), and the piston rod (2) penetrates through the inner part of the inner cylinder (9), and the outer surface of the piston rod (2) is contacted with the outer surface of the inner cylinder (9).

2. A piston-sensitive excavator cylinder according to claim 1 wherein: two sets of annular grooves (12) have been seted up to the surface of piston (4), and piston main seal (5) and ring (6) of wearing are located two sets of annular grooves (12) respectively, and ring (6) of wearing are close to one side of cushion collar (3), and piston main seal (5) are close to one side of nut (7).

3. A piston-sensitive excavator cylinder according to claim 2, wherein: the internal diameter of piston main seal (5) is less than the internal diameter of ring (6) of wearing, and the external diameter of piston main seal (5) is the same with the external diameter of ring (6) of wearing, the surface of piston (4) and the inner wall contact of cylinder (1), the surface of piston main seal (5) and the inner wall contact of cylinder (1).

4. A piston-sensitive excavator cylinder according to claim 1 wherein: round hole (8) have been seted up to the upper surface of piston (4), and inner tube (9) are located the inside of round hole (8), and the upper end integrated into one piece of inner tube (9) has ring (10), and the surface of ring (10) and the inner wall contact of round hole (8).

5. The piston-activated excavator cylinder of claim 4, wherein: the outer diameter of the inner cylinder (9) is smaller than that of the circular ring (10), a plurality of groups of springs (11) are arranged between the outer surface of the inner cylinder (9) and the inner wall of the circular hole (8), the springs (11) are uniformly arranged in an annular shape on the outer surface of the inner cylinder (9), and the two ends of each spring (11) are fixedly bonded with the outer surface of the inner cylinder (9) and the inner wall of the circular hole (8).

6. The piston-activated excavator cylinder of claim 5, wherein: a group of notches (13) are vertically formed in the outer surface of the inner cylinder (9), and the notches (13) penetrate through the upper surface of the circular ring (10) and the lower end of the inner cylinder (9).