CN201714738U

CN201714738U - Buffer oil pressure cylinder

Info

Publication number: CN201714738U
Application number: CN2010202967435U
Authority: CN
Inventors: 张志成
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-19
Filing date: 2010-08-19
Publication date: 2011-01-19
Anticipated expiration: 2020-08-19

Abstract

The utility model relates to a buffer oil pressure cylinder, which comprises an oil cylinder case, a piston rod, a piston, a sealing ring, a piston gasket, a first gasket, a Y-shaped sealing ring and a second gasket, wherein the piston rod is arranged in the oil cylinder case, the piston is sheathed on the piston rod and is positioned in the oil cylinder case, the sealing ring is arranged on the piston, the piston gasket is fixed at the end part of the piston rod, the first gasket is sheathed on the piston rod and is matched with the piston, the Y-shaped sealing ring is sheathed on a movable rod and is matched with the first gasket, the second gasket is sheathed on a pull rod and is matched with the Y-shaped sealing ring, the center of the piston is provided with an oil passing groove, one side of the piston is provided with an oil suction groove, and the piston is matched with the piston gasket. The utility model is characterized in that curved overflowing passages are arranged on the matching surface of the piston and the piston gasket, inlets of the overflowing passages are communicated with the oil passing groove, and outlets of the overflowing passages are communicated with the inside of the oil cylinder case. The utility model can ensure the uniform size of each overflowing passage, has the advantages of stable quality, strong buffer force and good buffer effect, and is convenient to product and process.

Description

The buffering oil hydraulic cylinder

Technical field

The utility model relates to a kind of buffering oil hydraulic cylinder.

Background technique

Existing buffering oil hydraulic cylinder comprises cylinder shell, be located at pull bar in the cylinder shell, be set on the pull bar and be positioned at cylinder shell piston, be located at O RunddichtringO on the piston, be set on the pull bar and first pad that cooperates with cylinder shell, be set on the pull bar and the y-type seal ring that cooperates with first pad and second pad that is set on the pull bar and cooperates with y-type seal ring; On piston, have oil-through hole and overflow hole; This overflow hole is offered on piston with drill bit or other processing method, the pore size difference of the overflow hole that new and old difference came outbreak out of drill bit in operating process, the pore size that people's difference that other operates is come outbreak out is also different, therefore pass through the oil mass difference of overflow hole, the buffer speed difference of a collection of buffering oil hydraulic cylinder of production.

In addition and since this oil spilling hole be a end face from piston through to another end face, stroke is short, and is the structure oil circuit that leads directly to, thus when the flowing medium that plays buffer function by the time, the resistance that is produced is little, so the cushioning effect of external active force is poor.

The model utility content

The purpose of this utility model is to overcome the deficiencies in the prior art and provide a kind of its buffer speed that can make in a collection of product identical, steady quality, and cushion effect is big, good buffer effect, a kind of easily buffering oil hydraulic cylinder of production and processing.

In order to achieve the above object, the utility model is to realize like this, it is a kind of buffering oil hydraulic cylinder, comprise cylinder shell, be located at piston rod in the cylinder shell, be set on the piston rod and be positioned at cylinder shell piston, be located at seal ring on the piston, be fixed on the piston rod end the piston pad, be set on the piston rod and first pad that cooperates with piston, be set on the bar alive and the y-type seal ring that cooperates with first pad and second pad that is set on the pull bar and cooperates with y-type seal ring; Center at piston had oil groove, had the oil suction groove in the one side of piston, and piston cooperates with the piston pad; It is characterized in that: have curved overflow ducts on the fitting surface of described piston and piston pad, the inlet of overflow ducts is communicated with the mistake oil groove, and the outlet of overflow ducts is communicated with cylinder shell is interior.

Described overflow ducts is that plum blossom shape is crooked to distribute, its be positioned at piston hole around.

The utility model advantage compared with prior art is, can guarantee that the size of each flow through is consistent, steady quality, and cushion effect is big, good buffer effect, production and processing is convenient.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the stereogram of the utility model piston;

Fig. 3 be among Fig. 2 from left to the stereogram of seeing piston;

Fig. 4 is a stereogram of seeing piston among Fig. 2 from right.

Specific embodiment

Below in conjunction with drawings and Examples the utility model is done further detailed description:

Shown in Fig. 1 to 4, it is a kind of buffering oil hydraulic cylinder, comprise cylinder shell 1, be located at piston rod 5 in the cylinder shell, be set on the piston rod and be positioned at cylinder shell piston 3, be located at seal ring 4 on the piston, be fixed on the piston rod end piston pad 2, be set on the piston rod and first pad 6 that cooperates with piston, be set on the bar alive and the y-type seal ring 7 that cooperates with first pad and second pad 8 that is set on the pull bar and cooperates with y-type seal ring; Had oil groove 31 at the center of piston, and had oil suction groove 32 in the one side of piston, piston cooperates with the piston pad; Characteristics of the present utility model are: have curved overflow ducts 33 on described piston 3 and face that piston pad 2 cooperates, the inlet of overflow ducts is communicated with mistake oil groove 31, the outlet of overflow ducts and 1 interior connection of cylinder shell, increase the length of overflow ducts like this, also just increased resistance accordingly.

In the present embodiment, described overflow ducts 33 is that plum blossom shape is crooked to distribute, its be positioned at piston hole around.During production, overflow ducts can be with the piston single injection-molded, and the size of the flow through in a collection of product is consistent, cushions the buffer speed unanimity of oil hydraulic cylinder like this, has also increased the length of overflow ducts, good buffer effect, the steady quality of product.In addition, overflow ducts 33 is the plum blossom shape bending, and when guaranteeing that constant flow passes through, each bending position all can increase resistance, therefore can be under the condition of identical buffer speed, and resistance of the present utility model is a lot of greatly, and cushion effect is big.

Claims

1. buffering oil hydraulic cylinder, comprise cylinder shell, be located at piston rod in the cylinder shell, be set on the piston rod and be positioned at cylinder shell piston, be located at seal ring on the piston, be fixed on the piston rod end the piston pad, be set on the piston rod and first pad that cooperates with piston, be set on the bar alive and the y-type seal ring that cooperates with first pad and second pad that is set on the pull bar and cooperates with y-type seal ring; Center at piston had oil groove, had the oil suction groove in the one side of piston, and piston cooperates with the piston pad; It is characterized in that: on described piston (3) and face that piston pad (2) cooperates, have curved overflow ducts (33), the inlet of overflow ducts with cross oil groove (31) and be communicated with, the outlet of overflow ducts is communicated with cylinder shell (1) is interior.

2. buffering oil hydraulic cylinder according to claim 1 is characterized in that: described overflow ducts (33) is that plum blossom shape is crooked to distribute, its be positioned at piston hole around.