CN2758546Y

CN2758546Y - Mechanical locking hydraulic cylinder

Info

Publication number: CN2758546Y
Application number: CN 200420099294
Authority: CN
Inventors: 荣君华
Original assignee: YANTAI XINGDE PNEUMATIC MACHINERY CO Ltd
Current assignee: YANTAI XINGDE PNEUMATIC MACHINERY CO Ltd
Priority date: 2004-12-28
Filing date: 2004-12-28
Publication date: 2006-02-15
Anticipated expiration: 2014-12-28

Abstract

The utility model relates to a mechanical locking hydraulic cylinder. A locking device (11), which is provided with a front oil port (10), is fixed at a front end cap (17). A lock sleeve (3) is fixed at the back end of a piston rod (2), and a lock sleeve port (8) at the front end of the lock sleeve (3) is matched with a lock core (16) of the locking device (11). The movement sequence of an oil cylinder piston and a switch of the lock core is explicit, so the utility model effectively prevents the mutual interference of the movements of the oil cylinder piston and the switch of the lock core. Consequently, the utility model overcomes the problem of fail in bending caused by collision. An oil cylinder with the structure has the advantages of firm and reliable locking, high safety and long service life.

Description

Mechanical lock compact form oil hydraulic cylinder

Technical field the utility model relates to a kind of oil hydraulic cylinder, particularly a kind of oil hydraulic cylinder that has mechanical locking device.

The existing locking oil hydraulic cylinder of background technique comprises various ways such as mechanical type, hydraulic type, and wherein the common deficiency of mechanical lock oil hydraulic cylinder is, reliability is relatively poor, and the main part that closes is fragile, and working life is short.Locking mechanism is in case damage, and gently then makes the oil cylinder can't proper functioning, and is heavy then may cause major accident such as mechanical damage.

Model utility content the purpose of this utility model provides a kind of mechanical lock compact form oil hydraulic cylinder of new structure, in order to overcome the deficiency of above-mentioned existing procucts.Solve the solid and reliable problem of hydraulic locking cylinder.

To achieve these goals, the utility model has adopted following technological scheme.

A kind of mechanical lock compact form oil hydraulic cylinder comprises cylinder sleeve, the piston rod that in cylinder sleeve, moves, and the front cover of cylinder sleeve rear and front end and rear end cover, back hydraulic fluid port is opened on the rear end cover, and its specialization is: the locking device of hydraulic fluid port is fixed on the front cover before offering; Lock tube is fixed on the rear end of piston rod; The lock tube mouth of lock tube front end matches with the lock core of locking device.

Described locking device comprises lock body and is installed in the lock core of lock body inside; The upper end of lock core links to each other by spring with the top of lock body, and the tegmental wall of front cover is run through in the lower end.

The upper end of lock core also is fixed with indicating arm, and the latter's top leans out from the top of lock body.

Lock tube and piston are fixed on the piston rod ear end face by nut.

Unique design of the present utility model makes that the opening and closing of locking device are reliable.The switch sequence of motion of the motion of oil cylinder piston and lock core is clear and definite, has prevented the mutual interference of both sides' motions effectively, thereby has overcome the crooked problem of damaging of collision.The oil cylinder locking of this structure is solid and reliable, and Security is good, long service life.

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

Embodiment as shown in Figure 1, embodiment of the present utility model is by cylinder sleeve 1, the piston rod 2 of operation in cylinder sleeve 1, the front cover 17 of cylinder sleeve 1 rear and front end, rear end cover 6, and the locking device 11 and the lock tube 3 of hydraulic fluid port 10 constitutes before offering.Back hydraulic fluid port 7 is opened on the rear end cover 6, and locking device 11 is fixed on the front cover 17; Lock tube 3 is fixed on piston rod 2 ear end faces with piston 4 by nut 5.Lock tube 3 processes with piston rod 2 one.

Described locking device 11 comprises lock body 14 and is installed in the lock core 16 of lock body 14 inside.The upper end of lock core 16 links to each other by spring 13 with the top of lock body 14, and the tegmental wall of front cover 17 is run through in the lower end.The upper end of lock core 16 also is fixed with indicating arm 12, and the latter's top leans out from the top of lock body 14.The setting of indicating arm 12 is the runnability of observing locking device in the hydraulic cylinder works process intuitively for convenience of the operator.

The lock tube mouth 8 of lock tube 3 front ends matches with the lock core 16 of locking device 11.Lock tube 3 preceding tops are designed to the shape of chamfering 9, just in case break down when pushing away lock core 16 on can not be effectively, this chamfering 9 can gently be implemented this function, and is unlikely to lock core 16 is broken when locking device.

During back hydraulic fluid port 7 oil-feeds, oil pressure raises in the cylinder sleeve 1 under the promotion of piston 4, and this oil pressure acts on lock core 16 and upwards promotes to make it to overcome the spring force position it and raises, and makes that the oil crust is communicated with preceding hydraulic fluid port 10 in the lock core.Oil pocket 15 hydraulic fluid port 10 outflows in the past of oil crust and locking device 11 in the oil process lock core in the cylinder sleeve 1, piston 4 is pushed ahead.When lock tube 3 arrives the position of lock core 16, piston 4 stop motions, lock core 16 snaps onto in the lock tube mouth 8 of lock tube 3 under spring 13 elastic force effects, plays the locking effect.

Before during hydraulic fluid port 10 oil-feeds, oil pressure raise in the oil pocket 15 of locking device 11, this oil pressure acts on lock core 16 and upwards promotes to make it to overcome the spring force position it and raises.Hydraulic fluid port 10 and the interior oily Ba Xianglian of lock core before making thus, hydraulic oil flow in the cylinder sleeve 1 through oil crust in oil pocket 15 and the lock core, while lock core 16 release lock running-ons 8, piston 4 is retreated under hydraulic pressure backward.

Claims

1, a kind of mechanical lock compact form oil hydraulic cylinder, comprise cylinder sleeve (1), the piston rod (2) of operation in cylinder sleeve (1), the front cover (17) of cylinder sleeve (1) rear and front end and rear end cover (6), back hydraulic fluid port (7) is opened on the rear end cover (6), it is characterized in that: the locking device (11) that offers preceding hydraulic fluid port (10) is fixed on the front cover (17); Lock tube (3) is fixed on the rear end of piston rod (2); The lock tube mouth (8) of lock tube (3) front end matches with the lock core (16) of locking device (11).

2, mechanical lock compact form oil hydraulic cylinder according to claim 1 is characterized in that: described locking device (11) comprises lock body (14) and is installed in the inner lock core (16) of lock body (14); The upper end of lock core (16) links to each other by spring (13) with the top of lock body (14), and the tegmental wall of front cover (17) is run through in the lower end.

3, mechanical lock compact form oil hydraulic cylinder according to claim 2, it is characterized in that: the upper end of lock core (16) also is fixed with indicating arm (12), and the latter's top leans out from the top of lock body (14).

4, according to claim 1 or 2 or 3 described mechanical lock compact form oil hydraulic cylinders, it is characterized in that: lock tube (3) is fixed on piston rod (2) ear end face with piston (4) by nut (5).