CN2748678Y

CN2748678Y - Spring type locking hydraulic cylinder

Info

Publication number: CN2748678Y
Application number: CN 200420084766
Authority: CN
Inventors: 米景芬; 南松; 谷宝南; 范春伟
Original assignee: No15 Institute Of China Academy Of Launch Vehicle Technology
Current assignee: No15 Institute Of China Academy Of Launch Vehicle Technology
Priority date: 2004-08-09
Filing date: 2004-08-09
Publication date: 2005-12-28
Anticipated expiration: 2014-08-09

Abstract

The utility model relates to a spring type locking oil cylinder which is divided into a spring locking form and a spring unlocking form. The spring type locking oil cylinder comprises an oil cylinder, a sleeve cylinder and a mechanical lock. The sleeve cylinder comprises a cylinder body and a connecting body. The connecting body is provided outside the cylinder body. One or a plurality of mechanical lock bodies distribute along the radial direction of the connecting body. The mechanical lock comprises a mechanical lock body, a mechanical lock core, a supporting body, a friction body and a spring. The spring of the spring locking type oil cylinder is installed on the supporting body. An oil opening is opened to the inverse cavity of the mechanical lock core. The pressure oil can be injected to the inverse cavity and the oil cylinder is unlocked to make extending and contracting motions. The spring of the spring unlocking type oil cylinder is installed in the inverse cavity of the mechanical lock core. An oil opening is opened to the positive cavity of the mechanical lock core. When the pressure oil is injected, the pressure produced by the pressure oil makes the friction body press the cylinder to produce frictional force, so the oil cylinder is locked. When the pressure oil is removed, elastic force can form an interval between the friction body and the cylinder wall. The oil cylinder is unlocked and can make extending and contracting motions. The utility model does not produce displacement phenomenon in the range of the locking force, and the utility model is available for the hydraulic engineering equipment with longer positioning time and higher request of the position accuracy.

Description

The spring locking cylinder

Technical field

The utility model relates to a kind of locking cylinder, particularly the spring locking cylinder.

Background technique

At present, in the hydraulic equipment elevating system, the locking that oil cylinder is gone up at an arbitrary position all is the locking mode that adopts hydraulic lock or equilibrium valve basically, even the sealability of this locking mode hydraulic lock or equilibrium valve absolute reliable (long-time use also has leakage), but gas is arranged owing to inevitably mix in the compressibility of hydraulic oil and the oil, and the influence of ambient temperature, the airtight hydraulic oil volume of oil cylinder is changed, cause oil cylinder when travel position stops arbitrarily, to produce offset phenomena.

The model utility content

Technology of the present utility model is dealt with problems and is: overcome the deficiencies in the prior art, a kind of spring locking cylinder is provided, this oil cylinder cooperates the frictional force of generation or the frictional force of hydraulic coupling pressing friction body generation to realize the mechanical interlocking of hydraulic jack on any travel position by spring with friction piece, can not produce the offset phenomena of generation when stopping.

One of technical solution of the present utility model is: the utility model divides spring locking and the spring two kinds of forms of unblanking, spring latch compact form locking cylinder wherein is characterized in that: oil cylinder is positioned at sleeve, link into an integrated entity by sleeve and mechanical lock, sleeve is made up of cylindrical shell and connecting body, connecting body is positioned at outside the cylindrical shell, and it is radially distributed with mechanical lock; Mechanical lock comprises mechanical lock body, mechanical lock, support, friction piece, spring, machinery lock body and connecting body are fixed together, and mechanical lock is connected with support, and support and friction piece link together, spring is installed on the support, and hydraulic fluid port leads to the anti-chamber of mechanical lock.

The quantity of described mechanical lock is at least 1, and what determine according to the size of mechanical interlocking power its quantity; Described spring is single spring or at least 2 cluster spring that spring is formed; Described spring is spring or dish spring.

The working method of spring latch compact form locking cylinder is divided into two states and promptly locks and release.Locking state, the oil cylinder stop motion, the anti-chamber of mechanical lock removal oil pressure, spring affacts on the oil cylinder outer tube wall by support and friction piece, the effect that the frictional force that produces between friction piece and the cylinder barrel wall stops cylinder block to carry outside produces axial motion down, realizes mechanical interlocking; Released state before the oil cylinder setting in motion, supplies pressure oil to the anti-chamber of mechanical lock hydraulic fluid port, mechanical lock moves under the effect of oil pressure, moves behind the drive friction piece, friction piece and cylinder tube outer wall is thrown off produce the gap, oil cylinder is in released state, and oil cylinder can be stretched and receive motion this moment.

Two of technical solution of the present utility model is: spring lock-opening style locking cylinder, it is characterized in that: it is made up of oil cylinder, sleeve and mechanical lock, oil cylinder is positioned at sleeve, link into an integrated entity by sleeve and mechanical lock, sleeve is made up of cylindrical shell and connecting body, connecting body is positioned at outside the cylindrical shell, and it is radially distributed with mechanical lock; Mechanical lock comprises mechanical lock body, mechanical lock, support, friction piece, spring, machinery lock body and connecting body are fixed together, and mechanical lock is connected with support, and support and friction piece link together, spring is installed on the anti-chamber of mechanical lock, and hydraulic fluid port leads to the positive chamber of mechanical lock.

Spring lock-opening style locking cylinder is by hydraulic fluid port logical pressure oil in the positive chamber of mechanical lock, the pressure that pressure oil produces makes friction piece compress cylinder barrel, produce frictional force, oil cylinder locking, when removal pressure oil, elastic force makes between friction piece and the barrel and forms the gap, and the oil cylinder release can be stretched and be received motion.

The utility model advantage compared with prior art is: the utility model cooperates the frictional force that produces to realize the mechanical interlocking of oil hydraulic cylinder on any travel position by spring with friction piece, can not produce offset phenomena in the coupling mechanism force scope.Can be used on the oilhydraulic engineering equipment that positioning time is long, position accuracy demand is higher.

Description of drawings

Fig. 1 is a structure sectional view of the present utility model;

Fig. 2 is the mechanical lock structure sectional view of one of technical solution of the present utility model;

Fig. 3 is two a mechanical lock structure sectional view of technical solution of the present utility model.

Embodiment

As shown in Figure 1, it among the utility model Fig. 1 spring latch compact form locking cylinder, form by oil cylinder 1, sleeve 2 and mechanical lock 3, its main body oil cylinder 1 is a load-bearing member, finish and stretch, receive function, the main distinction of it and common oil cylinder is the part that the cylinder barrel outer wall belongs to friction pair, and machining accuracy has certain requirement, and preservative treatment need be carried out in the surface simultaneously; Sleeve 2 is intermediary agencies that oil cylinder 1 and mechanical lock 3 link into an integrated entity, it is made up of cylindrical shell 21 and connecting body 22, cylindrical shell 21 is connected with the oil cylinder journal stirrup, when movement of cylinder block, play the guiding role, connecting body 22 is enclosed within outside the cylindrical shell 21, mechanical lock distributes along the radial direction of cylindrical shell 21, its quantity can be one or more, mainly decide according to required mechanical interlocking power size, if the tight power of machinery is little, then the quantity of mechanical lock is few, if mechanical interlocking power is big, then the quantity of mechanical lock is many, and the present embodiment mechanical lock adopts 4.The effect of mechanical lock 3 is under the effect of spring force, makes friction piece and oil cylinder outer tube wall form friction pair, finishes the mechanical interlocking function of oil cylinder.

As shown in Figure 2, mechanical lock 3 is by mechanical lock body 31, mechanical lock 32, support 33, friction piece 34, spring or

dish spring

35,35 is the dish spring in the present embodiment, machinery lock body 31 is fixed together with connecting body 22, elastic force compresses the formation friction pair with friction piece and cylinder barrel outer wall, the frictional force that produces between friction piece 34 and the cylinder barrel outer wall stops oil cylinder 1 motion, reaches the purpose of locking; When oil cylinder 1 needs motion, by hydraulic fluid port C logical pressure oil in lock, mechanical lock 32 moves backward under the effect of oil pressure, drives the motion backward simultaneously of support 33 and friction piece 34, make between friction piece 34 and the cylinder barrel outer wall and form the gap, the oil cylinder release can be stretched and be received motion.

As shown in Figure 3, in spring lock-opening style locking cylinder, spring or

dish spring

35,35 is spring in the present embodiment, is arranged on the anti-chamber of mechanical lock 32, is used to unblank, hydraulic fluid port C is arranged on positive chamber, is used for locking.By logical pressure oil in mechanical lock 32 positive chambeies, friction piece is compressed cylinder barrel, produce frictional force, oil cylinder locking; When removal pressure oil, spring or dish spring 35 make between friction piece and the barrel and form the gap, and the oil cylinder release can be stretched and be received motion.

Claims

1, spring locking cylinder is characterized in that: it is made up of oil cylinder, sleeve and mechanical lock, and oil cylinder is positioned at sleeve, links into an integrated entity by sleeve and mechanical lock, and sleeve is made up of cylindrical shell and connecting body, and connecting body is positioned at outside the cylindrical shell, and it is radially distributed with mechanical lock; Mechanical lock comprises mechanical lock body, mechanical lock, support, friction piece, spring, machinery lock body and connecting body are fixed together, and mechanical lock is connected with support, and support and friction piece link together, spring is installed on the support, and hydraulic fluid port leads to the anti-chamber of mechanical lock.

2, spring locking cylinder according to claim 1 is characterized in that: the quantity of described mechanical lock is at least 1.

3, spring locking cylinder according to claim 1 is characterized in that: described spring is single spring or at least 2 cluster spring that spring is formed.

4, spring locking cylinder according to claim 1 is characterized in that: described spring is spring or dish spring.

5, spring locking cylinder according to claim 1 is characterized in that: described spring is installed on the anti-chamber of mechanical lock, and hydraulic fluid port leads to the positive chamber of mechanical lock.